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STM32F3 : json clock source configuration 

- default value is the same as before patch
- system_stm32f3xx.c file is copied to family level with all other ST cube files
- specific clock configuration is now in a new file: system_clock.c (target level)
pull/4740/head
jeromecoutant 2017-07-10 14:28:47 +02:00
parent df6a570a41
commit bc40b735d4
14 changed files with 1649 additions and 2375 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

231
targets/TARGET_STM/TARGET_STM32F3/TARGET_STM32F302x8/TARGET_NUCLEO_F302R8/system_clock.c Normal file
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/* mbed Microcontroller Library
* Copyright (c) 2006-2017 ARM Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* This file configures the system clock as follows:
*-----------------------------------------------------------------------------
* System clock source | 1- USE_PLL_HSE_EXTC | 3- USE_PLL_HSI
* | (external 8 MHz clock) | (internal 8 MHz)
* | 2- USE_PLL_HSE_XTAL |
* | (external 8 MHz xtal) |
*-----------------------------------------------------------------------------
* SYSCLK(MHz) | 72 | 64
*-----------------------------------------------------------------------------
* AHBCLK (MHz) | 72 | 64
*-----------------------------------------------------------------------------
* APB1CLK (MHz) | 36 | 32
*-----------------------------------------------------------------------------
* APB2CLK (MHz) | 72 | 64
*-----------------------------------------------------------------------------
* USB capable | YES | NO
*-----------------------------------------------------------------------------
*/
#include "stm32f3xx.h"
#include "mbed_assert.h"
/*!< Uncomment the following line if you need to relocate your vector Table in
Internal SRAM. */
/* #define VECT_TAB_SRAM */
#define VECT_TAB_OFFSET 0x0 /*!< Vector Table base offset field.
This value must be a multiple of 0x200. */
// clock source is selected with CLOCK_SOURCE in json config
#define USE_PLL_HSE_EXTC 0x8 // Use external clock (ST Link MCO)
#define USE_PLL_HSE_XTAL 0x4 // Use external xtal (X3 on board - not provided by default)
#define USE_PLL_HSI 0x2 // Use HSI internal clock
#if ( ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) )
uint8_t SetSysClock_PLL_HSE(uint8_t bypass);
#endif /* ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) */
#if ((CLOCK_SOURCE) & USE_PLL_HSI)
uint8_t SetSysClock_PLL_HSI(void);
#endif /* ((CLOCK_SOURCE) & USE_PLL_HSI) */
/**
* @brief Setup the microcontroller system
* Initialize the FPU setting, vector table location and the PLL configuration is reset.
* @param None
* @retval None
*/
void SystemInit(void)
{
/* FPU settings ------------------------------------------------------------*/
#if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); /* set CP10 and CP11 Full Access */
#endif
/* Reset the RCC clock configuration to the default reset state ------------*/
/* Set HSION bit */
RCC->CR |= 0x00000001U;
/* Reset CFGR register */
RCC->CFGR &= 0xF87FC00CU;
/* Reset HSEON, CSSON and PLLON bits */
RCC->CR &= 0xFEF6FFFFU;
/* Reset HSEBYP bit */
RCC->CR &= 0xFFFBFFFFU;
/* Reset PLLSRC, PLLXTPRE, PLLMUL and USBPRE bits */
RCC->CFGR &= 0xFF80FFFFU;
/* Reset PREDIV1[3:0] bits */
RCC->CFGR2 &= 0xFFFFFFF0U;
/* Reset USARTSW[1:0], I2CSW and TIMs bits */
RCC->CFGR3 &= 0xFF00FCCCU;
/* Disable all interrupts */
RCC->CIR = 0x00000000U;
#ifdef VECT_TAB_SRAM
SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
#else
SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
#endif
}
/**
* @brief Configures the System clock source, PLL Multiplier and Divider factors,
* AHB/APBx prescalers and Flash settings
* @note This function should be called only once the RCC clock configuration
* is reset to the default reset state (done in SystemInit() function).
* @param None
* @retval None
*/
void SetSysClock(void)
{
#if ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC)
/* 1- Try to start with HSE and external clock */
if (SetSysClock_PLL_HSE(1) == 0)
#endif
{
#if ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL)
/* 2- If fail try to start with HSE and external xtal */
if (SetSysClock_PLL_HSE(0) == 0)
#endif
{
#if ((CLOCK_SOURCE) & USE_PLL_HSI)
/* 3- If fail start with HSI clock */
if (SetSysClock_PLL_HSI() == 0)
#endif
{
while(1) {
MBED_ASSERT(1);
}
}
}
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_SYSCLK, RCC_MCO_DIV1); // 72 MHz or 64 MHz
}
#if ( ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) )
/******************************************************************************/
/* PLL (clocked by HSE) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_PeriphCLKInitTypeDef RCC_PeriphClkInit;
/* Enable HSE oscillator and activate PLL with HSE as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
if (bypass == 0) {
RCC_OscInitStruct.HSEState = RCC_HSE_ON; /* External 8 MHz xtal on OSC_IN/OSC_OUT */
} else {
RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; /* External 8 MHz clock on OSC_IN */
}
RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9; // 72 MHz (8 MHz * 9)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 72 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 72 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 36 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 72 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
return 0; // FAIL
}
RCC_PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB;
RCC_PeriphClkInit.USBClockSelection = RCC_USBCLKSOURCE_PLL_DIV1_5;
if (HAL_RCCEx_PeriphCLKConfig(&RCC_PeriphClkInit) != HAL_OK) {
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//if (bypass == 0)
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV2); // 4 MHz with xtal
//else
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV1); // 8 MHz with ext clock
return 1; // OK
}
#endif /* ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) */
#if ((CLOCK_SOURCE) & USE_PLL_HSI)
/******************************************************************************/
/* PLL (clocked by HSI) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSI(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable HSI oscillator and activate PLL with HSI as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSEState = RCC_HSE_OFF;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL16; // 64 MHz (8 MHz/2 * 16)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 64 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 64 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 32 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 64 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSI, RCC_MCO_DIV1); // 8 MHz
return 1; // OK
}
#endif /* ((CLOCK_SOURCE) & USE_PLL_HSI) */

447
targets/TARGET_STM/TARGET_STM32F3/TARGET_STM32F302x8/TARGET_NUCLEO_F302R8/system_stm32f3xx.c
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/**
******************************************************************************
* @file system_stm32f3xx.c
* @author MCD Application Team
* @version V2.3.1
* @date 16-December-2016
* @brief CMSIS Cortex-M4 Device Peripheral Access Layer System Source File.
*
* 1. This file provides two functions and one global variable to be called from
* user application:
* - SystemInit(): This function is called at startup just after reset and
* before branch to main program. This call is made inside
* the "startup_stm32f3xx.s" file.
*
* - SystemCoreClock variable: Contains the core clock (HCLK), it can be used
* by the user application to setup the SysTick
* timer or configure other parameters.
*
* - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must
* be called whenever the core clock is changed
* during program execution.
*
* 2. After each device reset the HSI (8 MHz) is used as system clock source.
* Then SystemInit() function is called, in "startup_stm32f3xx.s" file, to
* configure the system clock before to branch to main program.
*
* 3. This file configures the system clock as follows:
*-----------------------------------------------------------------------------
* System clock source | 1- PLL_HSE_EXTC | 3- PLL_HSI
* | (external 8 MHz clock) | (internal 8 MHz)
* | 2- PLL_HSE_XTAL |
* | (external 8 MHz xtal) |
*-----------------------------------------------------------------------------
* SYSCLK(MHz) | 72 | 64
*-----------------------------------------------------------------------------
* AHBCLK (MHz) | 72 | 64
*-----------------------------------------------------------------------------
* APB1CLK (MHz) | 36 | 32
*-----------------------------------------------------------------------------
* APB2CLK (MHz) | 72 | 64
*-----------------------------------------------------------------------------
* USB capable (48 MHz precise clock) | NO | NO
*-----------------------------------------------------------------------------
******************************************************************************
* @attention
*
* <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************
*/
/** @addtogroup CMSIS
* @{
*/
/** @addtogroup stm32f3xx_system
* @{
*/
/** @addtogroup STM32F3xx_System_Private_Includes
* @{
*/
#include "stm32f3xx.h"
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_TypesDefinitions
* @{
*/
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_Defines
* @{
*/
#if !defined (HSE_VALUE)
#define HSE_VALUE ((uint32_t)8000000) /*!< Default value of the External oscillator in Hz.
This value can be provided and adapted by the user application. */
#endif /* HSE_VALUE */
#if !defined (HSI_VALUE)
#define HSI_VALUE ((uint32_t)8000000) /*!< Default value of the Internal oscillator in Hz.
This value can be provided and adapted by the user application. */
#endif /* HSI_VALUE */
/*!< Uncomment the following line if you need to relocate your vector Table in
Internal SRAM. */
/* #define VECT_TAB_SRAM */
#define VECT_TAB_OFFSET 0x0 /*!< Vector Table base offset field.
This value must be a multiple of 0x200. */
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_Macros
* @{
*/
/* Select the clock sources (other than HSI) to start with (0=OFF, 1=ON) */
#define USE_PLL_HSE_EXTC (1) /* Use external clock */
#define USE_PLL_HSE_XTAL (1) /* Use external xtal */
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_Variables
* @{
*/
/* This variable is updated in three ways:
1) by calling CMSIS function SystemCoreClockUpdate()
2) by calling HAL API function HAL_RCC_GetHCLKFreq()
3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
Note: If you use this function to configure the system clock there is no need to
call the 2 first functions listed above, since SystemCoreClock variable is
updated automatically.
*/
uint32_t SystemCoreClock = 72000000;
const uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9};
const uint8_t APBPrescTable[8] = {0, 0, 0, 0, 1, 2, 3, 4};
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_FunctionPrototypes
* @{
*/
#if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0)
uint8_t SetSysClock_PLL_HSE(uint8_t bypass);
#endif
uint8_t SetSysClock_PLL_HSI(void);
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_Functions
* @{
*/
/**
* @brief Setup the microcontroller system
* Initialize the FPU setting, vector table location and the PLL configuration is reset.
* @param None
* @retval None
*/
void SystemInit(void)
{
/* FPU settings ------------------------------------------------------------*/
#if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); /* set CP10 and CP11 Full Access */
#endif
/* Reset the RCC clock configuration to the default reset state ------------*/
/* Set HSION bit */
RCC->CR |= 0x00000001U;
/* Reset CFGR register */
RCC->CFGR &= 0xF87FC00CU;
/* Reset HSEON, CSSON and PLLON bits */
RCC->CR &= 0xFEF6FFFFU;
/* Reset HSEBYP bit */
RCC->CR &= 0xFFFBFFFFU;
/* Reset PLLSRC, PLLXTPRE, PLLMUL and USBPRE bits */
RCC->CFGR &= 0xFF80FFFFU;
/* Reset PREDIV1[3:0] bits */
RCC->CFGR2 &= 0xFFFFFFF0U;
/* Reset USARTSW[1:0], I2CSW and TIMs bits */
RCC->CFGR3 &= 0xFF00FCCCU;
/* Disable all interrupts */
RCC->CIR = 0x00000000U;
#ifdef VECT_TAB_SRAM
SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
#else
SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
#endif
}
/**
* @brief Update SystemCoreClock variable according to Clock Register Values.
* The SystemCoreClock variable contains the core clock (HCLK), it can
* be used by the user application to setup the SysTick timer or configure
* other parameters.
*
* @note Each time the core clock (HCLK) changes, this function must be called
* to update SystemCoreClock variable value. Otherwise, any configuration
* based on this variable will be incorrect.
*
* @note - The system frequency computed by this function is not the real
* frequency in the chip. It is calculated based on the predefined
* constant and the selected clock source:
*
* - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(*)
*
* - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(**)
*
* - If SYSCLK source is PLL, SystemCoreClock will contain the HSE_VALUE(**)
* or HSI_VALUE(*) multiplied/divided by the PLL factors.
*
* (*) HSI_VALUE is a constant defined in stm32f3xx_hal.h file (default value
* 8 MHz) but the real value may vary depending on the variations
* in voltage and temperature.
*
* (**) HSE_VALUE is a constant defined in stm32f3xx_hal.h file (default value
* 8 MHz), user has to ensure that HSE_VALUE is same as the real
* frequency of the crystal used. Otherwise, this function may
* have wrong result.
*
* - The result of this function could be not correct when using fractional
* value for HSE crystal.
*
* @param None
* @retval None
*/
void SystemCoreClockUpdate (void)
{
uint32_t tmp = 0, pllmull = 0, pllsource = 0, predivfactor = 0;
/* Get SYSCLK source -------------------------------------------------------*/
tmp = RCC->CFGR & RCC_CFGR_SWS;
switch (tmp)
{
case RCC_CFGR_SWS_HSI: /* HSI used as system clock */
SystemCoreClock = HSI_VALUE;
break;
case RCC_CFGR_SWS_HSE: /* HSE used as system clock */
SystemCoreClock = HSE_VALUE;
break;
case RCC_CFGR_SWS_PLL: /* PLL used as system clock */
/* Get PLL clock source and multiplication factor ----------------------*/
pllmull = RCC->CFGR & RCC_CFGR_PLLMUL;
pllsource = RCC->CFGR & RCC_CFGR_PLLSRC;
pllmull = ( pllmull >> 18) + 2;
#if defined (STM32F302xE) || defined (STM32F303xE) || defined (STM32F398xx)
predivfactor = (RCC->CFGR2 & RCC_CFGR2_PREDIV) + 1;
if (pllsource == RCC_CFGR_PLLSRC_HSE_PREDIV)
{
/* HSE oscillator clock selected as PREDIV1 clock entry */
SystemCoreClock = (HSE_VALUE / predivfactor) * pllmull;
}
else
{
/* HSI oscillator clock selected as PREDIV1 clock entry */
SystemCoreClock = (HSI_VALUE / predivfactor) * pllmull;
}
#else
if (pllsource == RCC_CFGR_PLLSRC_HSI_DIV2)
{
/* HSI oscillator clock divided by 2 selected as PLL clock entry */
SystemCoreClock = (HSI_VALUE >> 1) * pllmull;
}
else
{
predivfactor = (RCC->CFGR2 & RCC_CFGR2_PREDIV) + 1;
/* HSE oscillator clock selected as PREDIV1 clock entry */
SystemCoreClock = (HSE_VALUE / predivfactor) * pllmull;
}
#endif /* STM32F302xE || STM32F303xE || STM32F398xx */
break;
default: /* HSI used as system clock */
SystemCoreClock = HSI_VALUE;
break;
}
/* Compute HCLK clock frequency ----------------*/
/* Get HCLK prescaler */
tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)];
/* HCLK clock frequency */
SystemCoreClock >>= tmp;
}
/**
* @brief Configures the System clock source, PLL Multiplier and Divider factors,
* AHB/APBx prescalers and Flash settings
* @note This function should be called only once the RCC clock configuration
* is reset to the default reset state (done in SystemInit() function).
* @param None
* @retval None
*/
void SetSysClock(void)
{
/* 1- Try to start with HSE and external clock */
#if USE_PLL_HSE_EXTC != 0
if (SetSysClock_PLL_HSE(1) == 0)
#endif
{
/* 2- If fail try to start with HSE and external xtal */
#if USE_PLL_HSE_XTAL != 0
if (SetSysClock_PLL_HSE(0) == 0)
#endif
{
/* 3- If fail start with HSI clock */
if (SetSysClock_PLL_HSI() == 0)
{
while(1)
{
// [TODO] Put something here to tell the user that a problem occured...
}
}
}
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_SYSCLK, RCC_MCO_DIV1); // 72 MHz or 64 MHz
}
#if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0)
/******************************************************************************/
/* PLL (clocked by HSE) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable HSE oscillator and activate PLL with HSE as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
if (bypass == 0)
{
RCC_OscInitStruct.HSEState = RCC_HSE_ON; /* External 8 MHz xtal on OSC_IN/OSC_OUT */
}
else
{
RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; /* External 8 MHz clock on OSC_IN */
}
RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9; // 72 MHz (8 MHz * 9)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 72 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 72 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 36 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 72 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//if (bypass == 0)
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV2); // 4 MHz with xtal
//else
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV1); // 8 MHz with ext clock
return 1; // OK
}
#endif
/******************************************************************************/
/* PLL (clocked by HSI) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSI(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable HSI oscillator and activate PLL with HSI as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSEState = RCC_HSE_OFF;
RCC_OscInitStruct.HSICalibrationValue = 16;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL16; // 64 MHz (8 MHz/2 * 16)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 64 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 64 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 32 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 64 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSI, RCC_MCO_DIV1); // 8 MHz
return 1; // OK
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

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/* mbed Microcontroller Library
* Copyright (c) 2006-2017 ARM Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* This file configures the system clock as follows:
*-----------------------------------------------------------------------------
* System clock source | 1- USE_PLL_HSE_EXTC | 3- USE_PLL_HSI
* | (external 8 MHz clock) | (internal 8 MHz)
* | 2- USE_PLL_HSE_XTAL |
* | (external 8 MHz xtal) |
*-----------------------------------------------------------------------------
* SYSCLK(MHz) | 72 | 64
*-----------------------------------------------------------------------------
* AHBCLK (MHz) | 72 | 64
*-----------------------------------------------------------------------------
* APB1CLK (MHz) | 36 | 32
*-----------------------------------------------------------------------------
* APB2CLK (MHz) | 72 | 64
*-----------------------------------------------------------------------------
* USB capable | NO | NO
*-----------------------------------------------------------------------------
*/
#include "stm32f3xx.h"
#include "mbed_assert.h"
/*!< Uncomment the following line if you need to relocate your vector Table in
Internal SRAM. */
/* #define VECT_TAB_SRAM */
#define VECT_TAB_OFFSET 0x0 /*!< Vector Table base offset field.
This value must be a multiple of 0x200. */
// clock source is selected with CLOCK_SOURCE in json config
#define USE_PLL_HSE_EXTC 0x8 // Use external clock (ST Link MCO)
#define USE_PLL_HSE_XTAL 0x4 // Use external xtal (X3 on board - not provided by default)
#define USE_PLL_HSI 0x2 // Use HSI internal clock
#if ( ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) )
uint8_t SetSysClock_PLL_HSE(uint8_t bypass);
#endif /* ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) */
#if ((CLOCK_SOURCE) & USE_PLL_HSI)
uint8_t SetSysClock_PLL_HSI(void);
#endif /* ((CLOCK_SOURCE) & USE_PLL_HSI) */
/**
* @brief Setup the microcontroller system
* Initialize the FPU setting, vector table location and the PLL configuration is reset.
* @param None
* @retval None
*/
void SystemInit(void)
{
/* FPU settings ------------------------------------------------------------*/
#if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); /* set CP10 and CP11 Full Access */
#endif
/* Reset the RCC clock configuration to the default reset state ------------*/
/* Set HSION bit */
RCC->CR |= 0x00000001U;
/* Reset CFGR register */
RCC->CFGR &= 0xF87FC00CU;
/* Reset HSEON, CSSON and PLLON bits */
RCC->CR &= 0xFEF6FFFFU;
/* Reset HSEBYP bit */
RCC->CR &= 0xFFFBFFFFU;
/* Reset PLLSRC, PLLXTPRE, PLLMUL and USBPRE bits */
RCC->CFGR &= 0xFF80FFFFU;
/* Reset PREDIV1[3:0] bits */
RCC->CFGR2 &= 0xFFFFFFF0U;
/* Reset USARTSW[1:0], I2CSW and TIMs bits */
RCC->CFGR3 &= 0xFF00FCCCU;
/* Disable all interrupts */
RCC->CIR = 0x00000000U;
#ifdef VECT_TAB_SRAM
SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
#else
SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
#endif
}
/**
* @brief Configures the System clock source, PLL Multiplier and Divider factors,
* AHB/APBx prescalers and Flash settings
* @note This function should be called only once the RCC clock configuration
* is reset to the default reset state (done in SystemInit() function).
* @param None
* @retval None
*/
void SetSysClock(void)
{
#if ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC)
/* 1- Try to start with HSE and external clock */
if (SetSysClock_PLL_HSE(1) == 0)
#endif
{
#if ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL)
/* 2- If fail try to start with HSE and external xtal */
if (SetSysClock_PLL_HSE(0) == 0)
#endif
{
#if ((CLOCK_SOURCE) & USE_PLL_HSI)
/* 3- If fail start with HSI clock */
if (SetSysClock_PLL_HSI() == 0)
#endif
{
while(1) {
MBED_ASSERT(1);
}
}
}
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_SYSCLK, RCC_MCO_DIV1); // 72 MHz or 64 MHz
}
#if ( ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) )
/******************************************************************************/
/* PLL (clocked by HSE) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable HSE oscillator and activate PLL with HSE as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
if (bypass == 0) {
RCC_OscInitStruct.HSEState = RCC_HSE_ON; /* External 8 MHz xtal on OSC_IN/OSC_OUT */
} else {
RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; /* External 8 MHz clock on OSC_IN */
}
RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9; // 72 MHz (8 MHz * 9)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 72 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 72 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 36 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 72 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//if (bypass == 0)
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV2); // 4 MHz with xtal
//else
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV1); // 8 MHz with ext clock
return 1; // OK
}
#endif /* ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) */
#if ((CLOCK_SOURCE) & USE_PLL_HSI)
/******************************************************************************/
/* PLL (clocked by HSI) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSI(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable HSI oscillator and activate PLL with HSI as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSEState = RCC_HSE_OFF;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL16; // 64 MHz (8 MHz/2 * 16)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 64 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 64 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 32 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 64 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSI, RCC_MCO_DIV1); // 8 MHz
return 1; // OK
}
#endif /* ((CLOCK_SOURCE) & USE_PLL_HSI) */

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/* mbed Microcontroller Library
* Copyright (c) 2006-2017 ARM Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* This file configures the system clock as follows:
*-----------------------------------------------------------------------------
* System clock source | 1- PLL_HSE_EXTC | 3- PLL_HSI
* | (external 8 MHz clock) | (internal 8 MHz)
* | 2- PLL_HSE_XTAL |
* | (external 8 MHz xtal) |
*-----------------------------------------------------------------------------
* SYSCLK(MHz) | 72 | 64
*-----------------------------------------------------------------------------
* AHBCLK (MHz) | 72 | 64
*-----------------------------------------------------------------------------
* APB1CLK (MHz) | 36 | 32
*-----------------------------------------------------------------------------
* APB2CLK (MHz) | 72 | 64
*-----------------------------------------------------------------------------
* USB capable (48 MHz precise clock) | NO | NO
*-----------------------------------------------------------------------------
**/
#include "stm32f3xx.h"
/*!< Uncomment the following line if you need to relocate your vector Table in
Internal SRAM. */
/* #define VECT_TAB_SRAM */
#define VECT_TAB_OFFSET 0x0 /*!< Vector Table base offset field.
This value must be a multiple of 0x200. */
/* Select the clock sources (other than HSI) to start with (0=OFF, 1=ON) */
#define USE_PLL_HSE_EXTC (1) /* Use external clock */
#define USE_PLL_HSE_XTAL (1) /* Use external xtal */
#if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0)
uint8_t SetSysClock_PLL_HSE(uint8_t bypass);
#endif
uint8_t SetSysClock_PLL_HSI(void);
/**
* @brief Setup the microcontroller system
* Initialize the FPU setting, vector table location and the PLL configuration is reset.
* @param None
* @retval None
*/
void SystemInit(void)
{
/* FPU settings ------------------------------------------------------------*/
#if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); /* set CP10 and CP11 Full Access */
#endif
/* Reset the RCC clock configuration to the default reset state ------------*/
/* Set HSION bit */
RCC->CR |= 0x00000001U;
/* Reset CFGR register */
RCC->CFGR &= 0xF87FC00CU;
/* Reset HSEON, CSSON and PLLON bits */
RCC->CR &= 0xFEF6FFFFU;
/* Reset HSEBYP bit */
RCC->CR &= 0xFFFBFFFFU;
/* Reset PLLSRC, PLLXTPRE, PLLMUL and USBPRE bits */
RCC->CFGR &= 0xFF80FFFFU;
/* Reset PREDIV1[3:0] bits */
RCC->CFGR2 &= 0xFFFFFFF0U;
/* Reset USARTSW[1:0], I2CSW and TIMs bits */
RCC->CFGR3 &= 0xFF00FCCCU;
/* Disable all interrupts */
RCC->CIR = 0x00000000U;
#ifdef VECT_TAB_SRAM
SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
#else
SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
#endif
}
/**
* @brief Configures the System clock source, PLL Multiplier and Divider factors,
* AHB/APBx prescalers and Flash settings
* @note This function should be called only once the RCC clock configuration
* is reset to the default reset state (done in SystemInit() function).
* @param None
* @retval None
*/
void SetSysClock(void)
{
/* 1- Try to start with HSE and external clock */
#if USE_PLL_HSE_EXTC != 0
if (SetSysClock_PLL_HSE(1) == 0)
#endif
{
/* 2- If fail try to start with HSE and external xtal */
#if USE_PLL_HSE_XTAL != 0
if (SetSysClock_PLL_HSE(0) == 0)
#endif
{
/* 3- If fail start with HSI clock */
if (SetSysClock_PLL_HSI() == 0) {
while(1) {
// [TODO] Put something here to tell the user that a problem occured...
}
}
}
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_SYSCLK, RCC_MCO_DIV1); // 72 MHz or 64 MHz
}
#if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0)
/******************************************************************************/
/* PLL (clocked by HSE) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable HSE oscillator and activate PLL with HSE as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
if (bypass == 0) {
RCC_OscInitStruct.HSEState = RCC_HSE_ON; /* External 8 MHz xtal on OSC_IN/OSC_OUT */
} else {
RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; /* External 8 MHz clock on OSC_IN */
}
RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9; // 72 MHz (8 MHz * 9)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 72 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 72 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 36 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 72 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//if (bypass == 0)
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV2); // 4 MHz with xtal
//else
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV1); // 8 MHz with ext clock
return 1; // OK
}
#endif
/******************************************************************************/
/* PLL (clocked by HSI) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSI(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable HSI oscillator and activate PLL with HSI as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSEState = RCC_HSE_OFF;
RCC_OscInitStruct.HSICalibrationValue = 16;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL16; // 64 MHz (8 MHz/2 * 16)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 64 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 64 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 32 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 64 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSI, RCC_MCO_DIV1); // 8 MHz
return 1; // OK
}

446
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/**
******************************************************************************
* @file system_stm32f3xx.c
* @author MCD Application Team
* @version V2.3.1
* @date 16-December-2016
* @brief CMSIS Cortex-M4 Device Peripheral Access Layer System Source File.
*
* 1. This file provides two functions and one global variable to be called from
* user application:
* - SystemInit(): This function is called at startup just after reset and
* before branch to main program. This call is made inside
* the "startup_stm32f3xx.s" file.
*
* - SystemCoreClock variable: Contains the core clock (HCLK), it can be used
* by the user application to setup the SysTick
* timer or configure other parameters.
*
* - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must
* be called whenever the core clock is changed
* during program execution.
*
* 2. After each device reset the HSI (8 MHz) is used as system clock source.
* Then SystemInit() function is called, in "startup_stm32f3xx.s" file, to
* configure the system clock before to branch to main program.
*
* 3. This file configures the system clock as follows:
*-----------------------------------------------------------------------------
* System clock source | 1- PLL_HSE_EXTC | 3- PLL_HSI
* | (external 8 MHz clock) | (internal 8 MHz)
* | 2- PLL_HSE_XTAL |
* | (external 8 MHz xtal) |
*-----------------------------------------------------------------------------
* SYSCLK(MHz) | 72 | 64
*-----------------------------------------------------------------------------
* AHBCLK (MHz) | 72 | 64
*-----------------------------------------------------------------------------
* APB1CLK (MHz) | 36 | 32
*-----------------------------------------------------------------------------
* APB2CLK (MHz) | 72 | 64
*-----------------------------------------------------------------------------
* USB capable (48 MHz precise clock) | NO | NO
*-----------------------------------------------------------------------------
******************************************************************************
* @attention
*
* <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************
*/
/** @addtogroup CMSIS
* @{
*/
/** @addtogroup stm32f3xx_system
* @{
*/
/** @addtogroup STM32F3xx_System_Private_Includes
* @{
*/
#include "stm32f3xx.h"
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_TypesDefinitions
* @{
*/
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_Defines
* @{
*/
#if !defined (HSE_VALUE)
#define HSE_VALUE ((uint32_t)8000000) /*!< Default value of the External oscillator in Hz.
This value can be provided and adapted by the user application. */
#endif /* HSE_VALUE */
#if !defined (HSI_VALUE)
#define HSI_VALUE ((uint32_t)8000000) /*!< Default value of the Internal oscillator in Hz.
This value can be provided and adapted by the user application. */
#endif /* HSI_VALUE */
/*!< Uncomment the following line if you need to relocate your vector Table in
Internal SRAM. */
/* #define VECT_TAB_SRAM */
#define VECT_TAB_OFFSET 0x0 /*!< Vector Table base offset field.
This value must be a multiple of 0x200. */
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_Macros
* @{
*/
/* Select the clock sources (other than HSI) to start with (0=OFF, 1=ON) */
#define USE_PLL_HSE_EXTC (1) /* Use external clock */
#define USE_PLL_HSE_XTAL (1) /* Use external xtal */
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_Variables
* @{
*/
/* This variable is updated in three ways:
1) by calling CMSIS function SystemCoreClockUpdate()
2) by calling HAL API function HAL_RCC_GetHCLKFreq()
3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
Note: If you use this function to configure the system clock there is no need to
call the 2 first functions listed above, since SystemCoreClock variable is
updated automatically.
*/
uint32_t SystemCoreClock = 72000000;
const uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9};
const uint8_t APBPrescTable[8] = {0, 0, 0, 0, 1, 2, 3, 4};
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_FunctionPrototypes
* @{
*/
#if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0)
uint8_t SetSysClock_PLL_HSE(uint8_t bypass);
#endif
uint8_t SetSysClock_PLL_HSI(void);
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_Functions
* @{
*/
/**
* @brief Setup the microcontroller system
* Initialize the FPU setting, vector table location and the PLL configuration is reset.
* @param None
* @retval None
*/
void SystemInit(void)
{
/* FPU settings ------------------------------------------------------------*/
#if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); /* set CP10 and CP11 Full Access */
#endif
/* Reset the RCC clock configuration to the default reset state ------------*/
/* Set HSION bit */
RCC->CR |= 0x00000001U;
/* Reset CFGR register */
RCC->CFGR &= 0xF87FC00CU;
/* Reset HSEON, CSSON and PLLON bits */
RCC->CR &= 0xFEF6FFFFU;
/* Reset HSEBYP bit */
RCC->CR &= 0xFFFBFFFFU;
/* Reset PLLSRC, PLLXTPRE, PLLMUL and USBPRE bits */
RCC->CFGR &= 0xFF80FFFFU;
/* Reset PREDIV1[3:0] bits */
RCC->CFGR2 &= 0xFFFFFFF0U;
/* Reset USARTSW[1:0], I2CSW and TIMs bits */
RCC->CFGR3 &= 0xFF00FCCCU;
/* Disable all interrupts */
RCC->CIR = 0x00000000U;
#ifdef VECT_TAB_SRAM
SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
#else
SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
#endif
}
/**
* @brief Update SystemCoreClock variable according to Clock Register Values.
* The SystemCoreClock variable contains the core clock (HCLK), it can
* be used by the user application to setup the SysTick timer or configure
* other parameters.
*
* @note Each time the core clock (HCLK) changes, this function must be called
* to update SystemCoreClock variable value. Otherwise, any configuration
* based on this variable will be incorrect.
*
* @note - The system frequency computed by this function is not the real
* frequency in the chip. It is calculated based on the predefined
* constant and the selected clock source:
*
* - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(*)
*
* - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(**)
*
* - If SYSCLK source is PLL, SystemCoreClock will contain the HSE_VALUE(**)
* or HSI_VALUE(*) multiplied/divided by the PLL factors.
*
* (*) HSI_VALUE is a constant defined in stm32f3xx_hal.h file (default value
* 8 MHz) but the real value may vary depending on the variations
* in voltage and temperature.
*
* (**) HSE_VALUE is a constant defined in stm32f3xx_hal.h file (default value
* 8 MHz), user has to ensure that HSE_VALUE is same as the real
* frequency of the crystal used. Otherwise, this function may
* have wrong result.
*
* - The result of this function could be not correct when using fractional
* value for HSE crystal.
*
* @param None
* @retval None
*/
void SystemCoreClockUpdate (void)
{
uint32_t tmp = 0, pllmull = 0, pllsource = 0, predivfactor = 0;
/* Get SYSCLK source -------------------------------------------------------*/
tmp = RCC->CFGR & RCC_CFGR_SWS;
switch (tmp)
{
case RCC_CFGR_SWS_HSI: /* HSI used as system clock */
SystemCoreClock = HSI_VALUE;
break;
case RCC_CFGR_SWS_HSE: /* HSE used as system clock */
SystemCoreClock = HSE_VALUE;
break;
case RCC_CFGR_SWS_PLL: /* PLL used as system clock */
/* Get PLL clock source and multiplication factor ----------------------*/
pllmull = RCC->CFGR & RCC_CFGR_PLLMUL;
pllsource = RCC->CFGR & RCC_CFGR_PLLSRC;
pllmull = ( pllmull >> 18) + 2;
#if defined (STM32F302xE) || defined (STM32F303xE) || defined (STM32F398xx)
predivfactor = (RCC->CFGR2 & RCC_CFGR2_PREDIV) + 1;
if (pllsource == RCC_CFGR_PLLSRC_HSE_PREDIV)
{
/* HSE oscillator clock selected as PREDIV1 clock entry */
SystemCoreClock = (HSE_VALUE / predivfactor) * pllmull;
}
else
{
/* HSI oscillator clock selected as PREDIV1 clock entry */
SystemCoreClock = (HSI_VALUE / predivfactor) * pllmull;
}
#else
if (pllsource == RCC_CFGR_PLLSRC_HSI_DIV2)
{
/* HSI oscillator clock divided by 2 selected as PLL clock entry */
SystemCoreClock = (HSI_VALUE >> 1) * pllmull;
}
else
{
predivfactor = (RCC->CFGR2 & RCC_CFGR2_PREDIV) + 1;
/* HSE oscillator clock selected as PREDIV1 clock entry */
SystemCoreClock = (HSE_VALUE / predivfactor) * pllmull;
}
#endif /* STM32F302xE || STM32F303xE || STM32F398xx */
break;
default: /* HSI used as system clock */
SystemCoreClock = HSI_VALUE;
break;
}
/* Compute HCLK clock frequency ----------------*/
/* Get HCLK prescaler */
tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)];
/* HCLK clock frequency */
SystemCoreClock >>= tmp;
}
/**
* @brief Configures the System clock source, PLL Multiplier and Divider factors,
* AHB/APBx prescalers and Flash settings
* @note This function should be called only once the RCC clock configuration
* is reset to the default reset state (done in SystemInit() function).
* @param None
* @retval None
*/
void SetSysClock(void)
{
/* 1- Try to start with HSE and external clock */
#if USE_PLL_HSE_EXTC != 0
if (SetSysClock_PLL_HSE(1) == 0)
#endif
{
/* 2- If fail try to start with HSE and external xtal */
#if USE_PLL_HSE_XTAL != 0
if (SetSysClock_PLL_HSE(0) == 0)
#endif
{
/* 3- If fail start with HSI clock */
if (SetSysClock_PLL_HSI() == 0)
{
while(1)
{
// [TODO] Put something here to tell the user that a problem occured...
}
}
}
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_SYSCLK, RCC_MCO_DIV1); // 72 MHz or 64 MHz
}
#if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0)
/******************************************************************************/
/* PLL (clocked by HSE) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable HSE oscillator and activate PLL with HSE as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
if (bypass == 0)
{
RCC_OscInitStruct.HSEState = RCC_HSE_ON; /* External 8 MHz xtal on OSC_IN/OSC_OUT */
}
else
{
RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; /* External 8 MHz clock on OSC_IN */
}
RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9; // 72 MHz (8 MHz * 9)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 72 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 72 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 36 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 72 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//if (bypass == 0)
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV2); // 4 MHz with xtal
//else
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV1); // 8 MHz with ext clock
return 1; // OK
}
#endif
/******************************************************************************/
/* PLL (clocked by HSI) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSI(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable HSI oscillator and activate PLL with HSI as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSEState = RCC_HSE_OFF;
RCC_OscInitStruct.HSICalibrationValue = 16;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL16; // 64 MHz (8 MHz/2 * 16)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 64 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 64 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 32 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 64 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSI, RCC_MCO_DIV1); // 8 MHz
return 1; // OK
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

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/* mbed Microcontroller Library
* Copyright (c) 2006-2017 ARM Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* This file configures the system clock as follows:
*-----------------------------------------------------------------------------
* System clock source | 1- USE_PLL_HSE_EXTC (external 8 MHz clock)
* | 2- USE_PLL_HSE_XTAL (external 8 MHz xtal)
* | 3- USE_PLL_HSI (internal 8 MHz)
*-----------------------------------------------------------------------------
* SYSCLK(MHz) | 72
* AHBCLK (MHz) | 72
* APB1CLK (MHz) | 36
* APB2CLK (MHz) | 72
* USB capable | YES
*-----------------------------------------------------------------------------
*/
#include "stm32f3xx.h"
#include "mbed_assert.h"
/*!< Uncomment the following line if you need to relocate your vector Table in
Internal SRAM. */
/* #define VECT_TAB_SRAM */
#define VECT_TAB_OFFSET 0x0 /*!< Vector Table base offset field.
This value must be a multiple of 0x200. */
// clock source is selected with CLOCK_SOURCE in json config
#define USE_PLL_HSE_EXTC 0x8 // Use external clock (ST Link MCO)
#define USE_PLL_HSE_XTAL 0x4 // Use external xtal (X3 on board - not provided by default)
#define USE_PLL_HSI 0x2 // Use HSI internal clock
#if ( ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) )
uint8_t SetSysClock_PLL_HSE(uint8_t bypass);
#endif /* ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) */
#if ((CLOCK_SOURCE) & USE_PLL_HSI)
uint8_t SetSysClock_PLL_HSI(void);
#endif /* ((CLOCK_SOURCE) & USE_PLL_HSI) */
/**
* @brief Setup the microcontroller system
* Initialize the FPU setting, vector table location and the PLL configuration is reset.
* @param None
* @retval None
*/
void SystemInit(void)
{
/* FPU settings ------------------------------------------------------------*/
#if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); /* set CP10 and CP11 Full Access */
#endif
/* Reset the RCC clock configuration to the default reset state ------------*/
/* Set HSION bit */
RCC->CR |= 0x00000001U;
/* Reset CFGR register */
RCC->CFGR &= 0xF87FC00CU;
/* Reset HSEON, CSSON and PLLON bits */
RCC->CR &= 0xFEF6FFFFU;
/* Reset HSEBYP bit */
RCC->CR &= 0xFFFBFFFFU;
/* Reset PLLSRC, PLLXTPRE, PLLMUL and USBPRE bits */
RCC->CFGR &= 0xFF80FFFFU;
/* Reset PREDIV1[3:0] bits */
RCC->CFGR2 &= 0xFFFFFFF0U;
/* Reset USARTSW[1:0], I2CSW and TIMs bits */
RCC->CFGR3 &= 0xFF00FCCCU;
/* Disable all interrupts */
RCC->CIR = 0x00000000U;
#ifdef VECT_TAB_SRAM
SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
#else
SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
#endif
}
/**
* @brief Configures the System clock source, PLL Multiplier and Divider factors,
* AHB/APBx prescalers and Flash settings
* @note This function should be called only once the RCC clock configuration
* is reset to the default reset state (done in SystemInit() function).
* @param None
* @retval None
*/
void SetSysClock(void)
{
#if ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC)
/* 1- Try to start with HSE and external clock */
if (SetSysClock_PLL_HSE(1) == 0)
#endif
{
#if ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL)
/* 2- If fail try to start with HSE and external xtal */
if (SetSysClock_PLL_HSE(0) == 0)
#endif
{
#if ((CLOCK_SOURCE) & USE_PLL_HSI)
/* 3- If fail start with HSI clock */
if (SetSysClock_PLL_HSI() == 0)
#endif
{
while(1) {
MBED_ASSERT(1);
}
}
}
}
/* Output clock on MCO2 pin(PC9) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO2, RCC_MCO2SOURCE_SYSCLK, RCC_MCODIV_4);
}
#if ( ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) )
/******************************************************************************/
/* PLL (clocked by HSE) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_PeriphCLKInitTypeDef RCC_PeriphClkInit;
/* Enable HSE oscillator and activate PLL with HSE as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
if (bypass == 0) {
RCC_OscInitStruct.HSEState = RCC_HSE_ON; /* External 8 MHz xtal on OSC_IN/OSC_OUT */
} else {
RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; /* External 8 MHz clock on OSC_IN */
}
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV1;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9; // 72 MHz (8 MHz * 9)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 72 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 72 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 36 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 72 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
return 0; // FAIL
}
RCC_PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB;
RCC_PeriphClkInit.USBClockSelection = RCC_USBCLKSOURCE_PLL_DIV1_5;
if (HAL_RCCEx_PeriphCLKConfig(&RCC_PeriphClkInit) != HAL_OK) {
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//if (bypass == 0)
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV2); // 4 MHz with xtal
//else
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV1); // 8 MHz with ext clock
return 1; // OK
}
#endif /* ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) */
#if ((CLOCK_SOURCE) & USE_PLL_HSI)
/******************************************************************************/
/* PLL (clocked by HSI) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSI(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_PeriphCLKInitTypeDef RCC_PeriphClkInit;
/* Enable HSI oscillator and activate PLL with HSI as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSEState = RCC_HSE_OFF;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV1;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9; // 72 MHz (8 MHz/1 * 9)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 72 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 72 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 36 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 72 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
return 0; // FAIL
}
RCC_PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB;
RCC_PeriphClkInit.USBClockSelection = RCC_USBCLKSOURCE_PLL_DIV1_5;
if (HAL_RCCEx_PeriphCLKConfig(&RCC_PeriphClkInit) != HAL_OK) {
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSI, RCC_MCO_DIV1); // 8 MHz
return 1; // OK
}
#endif /* ((CLOCK_SOURCE) & USE_PLL_HSI) */

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/* mbed Microcontroller Library
* Copyright (c) 2006-2017 ARM Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* This file configures the system clock as follows:
*-----------------------------------------------------------------------------
* System clock source | 1- USE_PLL_HSE_EXTC (external 8 MHz clock)
* | 2- USE_PLL_HSE_XTAL (external 8 MHz xtal)
* | 3- USE_PLL_HSI (internal 8 MHz)
*-----------------------------------------------------------------------------
* SYSCLK(MHz) | 72
* AHBCLK (MHz) | 72
* APB1CLK (MHz) | 36
* APB2CLK (MHz) | 72
* USB capable | YES
*-----------------------------------------------------------------------------
*/
#include "stm32f3xx.h"
#include "mbed_assert.h"
/*!< Uncomment the following line if you need to relocate your vector Table in
Internal SRAM. */
/* #define VECT_TAB_SRAM */
#define VECT_TAB_OFFSET 0x0 /*!< Vector Table base offset field.
This value must be a multiple of 0x200. */
// clock source is selected with CLOCK_SOURCE in json config
#define USE_PLL_HSE_EXTC 0x8 // Use external clock (ST Link MCO)
#define USE_PLL_HSE_XTAL 0x4 // Use external xtal (X3 on board - not provided by default)
#define USE_PLL_HSI 0x2 // Use HSI internal clock
#if ( ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) )
uint8_t SetSysClock_PLL_HSE(uint8_t bypass);
#endif /* ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) */
#if ((CLOCK_SOURCE) & USE_PLL_HSI)
uint8_t SetSysClock_PLL_HSI(void);
#endif /* ((CLOCK_SOURCE) & USE_PLL_HSI) */
/**
* @brief Setup the microcontroller system
* Initialize the FPU setting, vector table location and the PLL configuration is reset.
* @param None
* @retval None
*/
void SystemInit(void)
{
/* FPU settings ------------------------------------------------------------*/
#if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); /* set CP10 and CP11 Full Access */
#endif
/* Reset the RCC clock configuration to the default reset state ------------*/
/* Set HSION bit */
RCC->CR |= 0x00000001U;
/* Reset CFGR register */
RCC->CFGR &= 0xF87FC00CU;
/* Reset HSEON, CSSON and PLLON bits */
RCC->CR &= 0xFEF6FFFFU;
/* Reset HSEBYP bit */
RCC->CR &= 0xFFFBFFFFU;
/* Reset PLLSRC, PLLXTPRE, PLLMUL and USBPRE bits */
RCC->CFGR &= 0xFF80FFFFU;
/* Reset PREDIV1[3:0] bits */
RCC->CFGR2 &= 0xFFFFFFF0U;
/* Reset USARTSW[1:0], I2CSW and TIMs bits */
RCC->CFGR3 &= 0xFF00FCCCU;
/* Disable all interrupts */
RCC->CIR = 0x00000000U;
#ifdef VECT_TAB_SRAM
SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
#else
SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
#endif
}
/**
* @brief Configures the System clock source, PLL Multiplier and Divider factors,
* AHB/APBx prescalers and Flash settings
* @note This function should be called only once the RCC clock configuration
* is reset to the default reset state (done in SystemInit() function).
* @param None
* @retval None
*/
void SetSysClock(void)
{
#if ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC)
/* 1- Try to start with HSE and external clock */
if (SetSysClock_PLL_HSE(1) == 0)
#endif
{
#if ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL)
/* 2- If fail try to start with HSE and external xtal */
if (SetSysClock_PLL_HSE(0) == 0)
#endif
{
#if ((CLOCK_SOURCE) & USE_PLL_HSI)
/* 3- If fail start with HSI clock */
if (SetSysClock_PLL_HSI() == 0)
#endif
{
while(1) {
MBED_ASSERT(1);
}
}
}
}
/* Output clock on MCO2 pin(PC9) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO2, RCC_MCO2SOURCE_SYSCLK, RCC_MCODIV_4);
}
#if ( ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) )
/******************************************************************************/
/* PLL (clocked by HSE) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_PeriphCLKInitTypeDef RCC_PeriphClkInit;
/* Enable HSE oscillator and activate PLL with HSE as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
if (bypass == 0) {
RCC_OscInitStruct.HSEState = RCC_HSE_ON; /* External 8 MHz xtal on OSC_IN/OSC_OUT */
} else {
RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; /* External 8 MHz clock on OSC_IN */
}
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV1;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9; // 72 MHz (8 MHz * 9)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 72 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 72 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 36 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 72 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
return 0; // FAIL
}
RCC_PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB;
RCC_PeriphClkInit.USBClockSelection = RCC_USBCLKSOURCE_PLL_DIV1_5;
if (HAL_RCCEx_PeriphCLKConfig(&RCC_PeriphClkInit) != HAL_OK) {
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//if (bypass == 0)
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV2); // 4 MHz with xtal
//else
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV1); // 8 MHz with ext clock
return 1; // OK
}
#endif /* ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) */
#if ((CLOCK_SOURCE) & USE_PLL_HSI)
/******************************************************************************/
/* PLL (clocked by HSI) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSI(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_PeriphCLKInitTypeDef RCC_PeriphClkInit;
/* Enable HSI oscillator and activate PLL with HSI as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSEState = RCC_HSE_OFF;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV1;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9; // 72 MHz (8 MHz/1 * 9)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 72 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 72 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 36 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 72 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
return 0; // FAIL
}
RCC_PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB;
RCC_PeriphClkInit.USBClockSelection = RCC_USBCLKSOURCE_PLL_DIV1_5;
if (HAL_RCCEx_PeriphCLKConfig(&RCC_PeriphClkInit) != HAL_OK) {
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSI, RCC_MCO_DIV1); // 8 MHz
return 1; // OK
}
#endif /* ((CLOCK_SOURCE) & USE_PLL_HSI) */

447
targets/TARGET_STM/TARGET_STM32F3/TARGET_STM32F303xE/device/system_stm32f3xx.c
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@ -1,447 +0,0 @@
/**
******************************************************************************
* @file system_stm32f3xx.c
* @author MCD Application Team
* @version V2.3.1
* @date 16-December-2016
* @brief CMSIS Cortex-M4 Device Peripheral Access Layer System Source File.
*
* 1. This file provides two functions and one global variable to be called from
* user application:
* - SystemInit(): This function is called at startup just after reset and
* before branch to main program. This call is made inside
* the "startup_stm32f3xx.s" file.
*
* - SystemCoreClock variable: Contains the core clock (HCLK), it can be used
* by the user application to setup the SysTick
* timer or configure other parameters.
*
* - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must
* be called whenever the core clock is changed
* during program execution.
*
* 2. After each device reset the HSI (8 MHz) is used as system clock source.
* Then SystemInit() function is called, in "startup_stm32f3xx.s" file, to
* configure the system clock before to branch to main program.
*
* 3. This file configures the system clock as follows:
*-----------------------------------------------------------------------------
* System clock source | 1- PLL_HSE_EXTC | 3- PLL_HSI
* | (external 8 MHz clock) | (internal 8 MHz)
* | 2- PLL_HSE_XTAL |
* | (external 8 MHz xtal) |
*-----------------------------------------------------------------------------
* SYSCLK(MHz) | 72 | 64
*-----------------------------------------------------------------------------
* AHBCLK (MHz) | 72 | 64
*-----------------------------------------------------------------------------
* APB1CLK (MHz) | 36 | 32
*-----------------------------------------------------------------------------
* APB2CLK (MHz) | 72 | 64
*-----------------------------------------------------------------------------
* USB capable (48 MHz precise clock) | NO | NO
*-----------------------------------------------------------------------------
******************************************************************************
* @attention
*
* <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************
*/
/** @addtogroup CMSIS
* @{
*/
/** @addtogroup stm32f3xx_system
* @{
*/
/** @addtogroup STM32F3xx_System_Private_Includes
* @{
*/
#include "stm32f3xx.h"
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_TypesDefinitions
* @{
*/
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_Defines
* @{
*/
#if !defined (HSE_VALUE)
#define HSE_VALUE ((uint32_t)8000000) /*!< Default value of the External oscillator in Hz.
This value can be provided and adapted by the user application. */
#endif /* HSE_VALUE */
#if !defined (HSI_VALUE)
#define HSI_VALUE ((uint32_t)8000000) /*!< Default value of the Internal oscillator in Hz.
This value can be provided and adapted by the user application. */
#endif /* HSI_VALUE */
/*!< Uncomment the following line if you need to relocate your vector Table in
Internal SRAM. */
/* #define VECT_TAB_SRAM */
#define VECT_TAB_OFFSET 0x0 /*!< Vector Table base offset field.
This value must be a multiple of 0x200. */
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_Macros
* @{
*/
/* Select the clock sources (other than HSI) to start with (0=OFF, 1=ON) */
#define USE_PLL_HSE_EXTC (1) /* Use external clock */
#define USE_PLL_HSE_XTAL (1) /* Use external xtal */
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_Variables
* @{
*/
/* This variable is updated in three ways:
1) by calling CMSIS function SystemCoreClockUpdate()
2) by calling HAL API function HAL_RCC_GetHCLKFreq()
3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
Note: If you use this function to configure the system clock there is no need to
call the 2 first functions listed above, since SystemCoreClock variable is
updated automatically.
*/
uint32_t SystemCoreClock = 72000000;
const uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9};
const uint8_t APBPrescTable[8] = {0, 0, 0, 0, 1, 2, 3, 4};
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_FunctionPrototypes
* @{
*/
#if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0)
uint8_t SetSysClock_PLL_HSE(uint8_t bypass);
#endif
uint8_t SetSysClock_PLL_HSI(void);
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_Functions
* @{
*/
/**
* @brief Setup the microcontroller system
* Initialize the FPU setting, vector table location and the PLL configuration is reset.
* @param None
* @retval None
*/
void SystemInit(void)
{
/* FPU settings ------------------------------------------------------------*/
#if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); /* set CP10 and CP11 Full Access */
#endif
/* Reset the RCC clock configuration to the default reset state ------------*/
/* Set HSION bit */
RCC->CR |= 0x00000001U;
/* Reset CFGR register */
RCC->CFGR &= 0xF87FC00CU;
/* Reset HSEON, CSSON and PLLON bits */
RCC->CR &= 0xFEF6FFFFU;
/* Reset HSEBYP bit */
RCC->CR &= 0xFFFBFFFFU;
/* Reset PLLSRC, PLLXTPRE, PLLMUL and USBPRE bits */
RCC->CFGR &= 0xFF80FFFFU;
/* Reset PREDIV1[3:0] bits */
RCC->CFGR2 &= 0xFFFFFFF0U;
/* Reset USARTSW[1:0], I2CSW and TIMs bits */
RCC->CFGR3 &= 0xFF00FCCCU;
/* Disable all interrupts */
RCC->CIR = 0x00000000U;
#ifdef VECT_TAB_SRAM
SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
#else
SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
#endif
}
/**
* @brief Update SystemCoreClock variable according to Clock Register Values.
* The SystemCoreClock variable contains the core clock (HCLK), it can
* be used by the user application to setup the SysTick timer or configure
* other parameters.
*
* @note Each time the core clock (HCLK) changes, this function must be called
* to update SystemCoreClock variable value. Otherwise, any configuration
* based on this variable will be incorrect.
*
* @note - The system frequency computed by this function is not the real
* frequency in the chip. It is calculated based on the predefined
* constant and the selected clock source:
*
* - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(*)
*
* - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(**)
*
* - If SYSCLK source is PLL, SystemCoreClock will contain the HSE_VALUE(**)
* or HSI_VALUE(*) multiplied/divided by the PLL factors.
*
* (*) HSI_VALUE is a constant defined in stm32f3xx_hal.h file (default value
* 8 MHz) but the real value may vary depending on the variations
* in voltage and temperature.
*
* (**) HSE_VALUE is a constant defined in stm32f3xx_hal.h file (default value
* 8 MHz), user has to ensure that HSE_VALUE is same as the real
* frequency of the crystal used. Otherwise, this function may
* have wrong result.
*
* - The result of this function could be not correct when using fractional
* value for HSE crystal.
*
* @param None
* @retval None
*/
void SystemCoreClockUpdate (void)
{
uint32_t tmp = 0, pllmull = 0, pllsource = 0, predivfactor = 0;
/* Get SYSCLK source -------------------------------------------------------*/
tmp = RCC->CFGR & RCC_CFGR_SWS;
switch (tmp)
{
case RCC_CFGR_SWS_HSI: /* HSI used as system clock */
SystemCoreClock = HSI_VALUE;
break;
case RCC_CFGR_SWS_HSE: /* HSE used as system clock */
SystemCoreClock = HSE_VALUE;
break;
case RCC_CFGR_SWS_PLL: /* PLL used as system clock */
/* Get PLL clock source and multiplication factor ----------------------*/
pllmull = RCC->CFGR & RCC_CFGR_PLLMUL;
pllsource = RCC->CFGR & RCC_CFGR_PLLSRC;
pllmull = ( pllmull >> 18) + 2;
#if defined (STM32F302xE) || defined (STM32F303xE) || defined (STM32F398xx)
predivfactor = (RCC->CFGR2 & RCC_CFGR2_PREDIV) + 1;
if (pllsource == RCC_CFGR_PLLSRC_HSE_PREDIV)
{
/* HSE oscillator clock selected as PREDIV1 clock entry */
SystemCoreClock = (HSE_VALUE / predivfactor) * pllmull;
}
else
{
/* HSI oscillator clock selected as PREDIV1 clock entry */
SystemCoreClock = (HSI_VALUE / predivfactor) * pllmull;
}
#else
if (pllsource == RCC_CFGR_PLLSRC_HSI_DIV2)
{
/* HSI oscillator clock divided by 2 selected as PLL clock entry */
SystemCoreClock = (HSI_VALUE >> 1) * pllmull;
}
else
{
predivfactor = (RCC->CFGR2 & RCC_CFGR2_PREDIV) + 1;
/* HSE oscillator clock selected as PREDIV1 clock entry */
SystemCoreClock = (HSE_VALUE / predivfactor) * pllmull;
}
#endif /* STM32F302xE || STM32F303xE || STM32F398xx */
break;
default: /* HSI used as system clock */
SystemCoreClock = HSI_VALUE;
break;
}
/* Compute HCLK clock frequency ----------------*/
/* Get HCLK prescaler */
tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)];
/* HCLK clock frequency */
SystemCoreClock >>= tmp;
}
/**
* @brief Configures the System clock source, PLL Multiplier and Divider factors,
* AHB/APBx prescalers and Flash settings
* @note This function should be called only once the RCC clock configuration
* is reset to the default reset state (done in SystemInit() function).
* @param None
* @retval None
*/
void SetSysClock(void)
{
/* 1- Try to start with HSE and external clock */
#if USE_PLL_HSE_EXTC != 0
if (SetSysClock_PLL_HSE(1) == 0)
#endif
{
/* 2- If fail try to start with HSE and external xtal */
#if USE_PLL_HSE_XTAL != 0
if (SetSysClock_PLL_HSE(0) == 0)
#endif
{
/* 3- If fail start with HSI clock */
if (SetSysClock_PLL_HSI() == 0)
{
while(1)
{
// [TODO] Put something here to tell the user that a problem occured...
}
}
}
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_SYSCLK, RCC_MCO_DIV1); // 72 MHz or 64 MHz
}
#if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0)
/******************************************************************************/
/* PLL (clocked by HSE) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable HSE oscillator and activate PLL with HSE as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
if (bypass == 0)
{
RCC_OscInitStruct.HSEState = RCC_HSE_ON; /* External 8 MHz xtal on OSC_IN/OSC_OUT */
}
else
{
RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; /* External 8 MHz clock on OSC_IN */
}
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV1;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9; // 72 MHz (8 MHz * 9)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 72 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 72 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 36 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 72 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//if (bypass == 0)
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV2); // 4 MHz with xtal
//else
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV1); // 8 MHz with ext clock
return 1; // OK
}
#endif
/******************************************************************************/
/* PLL (clocked by HSI) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSI(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable HSI oscillator and activate PLL with HSI as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSEState = RCC_HSE_OFF;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV2;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL16; // 64 MHz (8 MHz/2 * 16)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 64 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 64 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 32 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 64 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSI, RCC_MCO_DIV1); // 8 MHz
return 1; // OK
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

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targets/TARGET_STM/TARGET_STM32F3/TARGET_STM32F334x8/TARGET_DISCO_F334C8/system_clock.c Normal file
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@ -0,0 +1,224 @@
/* mbed Microcontroller Library
* Copyright (c) 2006-2017 ARM Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* This file configures the system clock as follows:
*-----------------------------------------------------------------------------
* System clock source | 1- USE_PLL_HSE_EXTC | 3- USE_PLL_HSI
* | (external 8 MHz clock) | (internal 8 MHz)
* | 2- USE_PLL_HSE_XTAL |
* | (external 8 MHz xtal) |
*-----------------------------------------------------------------------------
* SYSCLK(MHz) | 72 | 64
*-----------------------------------------------------------------------------
* AHBCLK (MHz) | 72 | 64
*-----------------------------------------------------------------------------
* APB1CLK (MHz) | 36 | 32
*-----------------------------------------------------------------------------
* APB2CLK (MHz) | 72 | 64
*-----------------------------------------------------------------------------
* USB capable | NO | NO
*-----------------------------------------------------------------------------
*/
#include "stm32f3xx.h"
#include "mbed_assert.h"
/*!< Uncomment the following line if you need to relocate your vector Table in
Internal SRAM. */
/* #define VECT_TAB_SRAM */
#define VECT_TAB_OFFSET 0x0 /*!< Vector Table base offset field.
This value must be a multiple of 0x200. */
// clock source is selected with CLOCK_SOURCE in json config
#define USE_PLL_HSE_EXTC 0x8 // Use external clock (ST Link MCO)
#define USE_PLL_HSE_XTAL 0x4 // Use external xtal (X3 on board - not provided by default)
#define USE_PLL_HSI 0x2 // Use HSI internal clock
#if ( ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) )
uint8_t SetSysClock_PLL_HSE(uint8_t bypass);
#endif /* ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) */
#if ((CLOCK_SOURCE) & USE_PLL_HSI)
uint8_t SetSysClock_PLL_HSI(void);
#endif /* ((CLOCK_SOURCE) & USE_PLL_HSI) */
/**
* @brief Setup the microcontroller system
* Initialize the FPU setting, vector table location and the PLL configuration is reset.
* @param None
* @retval None
*/
void SystemInit(void)
{
/* FPU settings ------------------------------------------------------------*/
#if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); /* set CP10 and CP11 Full Access */
#endif
/* Reset the RCC clock configuration to the default reset state ------------*/
/* Set HSION bit */
RCC->CR |= 0x00000001U;
/* Reset CFGR register */
RCC->CFGR &= 0xF87FC00CU;
/* Reset HSEON, CSSON and PLLON bits */
RCC->CR &= 0xFEF6FFFFU;
/* Reset HSEBYP bit */
RCC->CR &= 0xFFFBFFFFU;
/* Reset PLLSRC, PLLXTPRE, PLLMUL and USBPRE bits */
RCC->CFGR &= 0xFF80FFFFU;
/* Reset PREDIV1[3:0] bits */
RCC->CFGR2 &= 0xFFFFFFF0U;
/* Reset USARTSW[1:0], I2CSW and TIMs bits */
RCC->CFGR3 &= 0xFF00FCCCU;
/* Disable all interrupts */
RCC->CIR = 0x00000000U;
#ifdef VECT_TAB_SRAM
SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
#else
SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
#endif
}
/**
* @brief Configures the System clock source, PLL Multiplier and Divider factors,
* AHB/APBx prescalers and Flash settings
* @note This function should be called only once the RCC clock configuration
* is reset to the default reset state (done in SystemInit() function).
* @param None
* @retval None
*/
void SetSysClock(void)
{
#if ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC)
/* 1- Try to start with HSE and external clock */
if (SetSysClock_PLL_HSE(1) == 0)
#endif
{
#if ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL)
/* 2- If fail try to start with HSE and external xtal */
if (SetSysClock_PLL_HSE(0) == 0)
#endif
{
#if ((CLOCK_SOURCE) & USE_PLL_HSI)
/* 3- If fail start with HSI clock */
if (SetSysClock_PLL_HSI() == 0)
#endif
{
while(1) {
MBED_ASSERT(1);
}
}
}
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_SYSCLK, RCC_MCO_DIV1); // 72 MHz or 64 MHz
}
#if ( ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) )
/******************************************************************************/
/* PLL (clocked by HSE) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable HSE oscillator and activate PLL with HSE as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
if (bypass == 0) {
RCC_OscInitStruct.HSEState = RCC_HSE_ON; /* External 8 MHz xtal on OSC_IN/OSC_OUT */
} else {
RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; /* External 8 MHz clock on OSC_IN */
}
RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9; // 72 MHz (8 MHz * 9)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 72 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 72 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 36 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 72 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//if (bypass == 0)
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV2); // 4 MHz with xtal
//else
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV1); // 8 MHz with ext clock
return 1; // OK
}
#endif /* ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) */
#if ((CLOCK_SOURCE) & USE_PLL_HSI)
/******************************************************************************/
/* PLL (clocked by HSI) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSI(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable HSI oscillator and activate PLL with HSI as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSEState = RCC_HSE_OFF;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL16; // 64 MHz (8 MHz/2 * 16)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 64 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 64 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 32 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 64 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSI, RCC_MCO_DIV1); // 8 MHz
return 1; // OK
}
#endif /* ((CLOCK_SOURCE) & USE_PLL_HSI) */

446
targets/TARGET_STM/TARGET_STM32F3/TARGET_STM32F334x8/TARGET_DISCO_F334C8/system_stm32f3xx.c
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/**
******************************************************************************
* @file system_stm32f3xx.c
* @author MCD Application Team
* @version V2.3.1
* @date 16-December-2016
* @brief CMSIS Cortex-M4 Device Peripheral Access Layer System Source File.
*
* 1. This file provides two functions and one global variable to be called from
* user application:
* - SystemInit(): This function is called at startup just after reset and
* before branch to main program. This call is made inside
* the "startup_stm32f3xx.s" file.
*
* - SystemCoreClock variable: Contains the core clock (HCLK), it can be used
* by the user application to setup the SysTick
* timer or configure other parameters.
*
* - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must
* be called whenever the core clock is changed
* during program execution.
*
* 2. After each device reset the HSI (8 MHz) is used as system clock source.
* Then SystemInit() function is called, in "startup_stm32f3xx.s" file, to
* configure the system clock before to branch to main program.
*
* 3. This file configures the system clock as follows:
*-----------------------------------------------------------------------------
* System clock source | 1- PLL_HSE_EXTC | 3- PLL_HSI
* | (external 8 MHz clock) | (internal 8 MHz)
* | 2- PLL_HSE_XTAL |
* | (external 8 MHz xtal) |
*-----------------------------------------------------------------------------
* SYSCLK(MHz) | 72 | 64
*-----------------------------------------------------------------------------
* AHBCLK (MHz) | 72 | 64
*-----------------------------------------------------------------------------
* APB1CLK (MHz) | 36 | 32
*-----------------------------------------------------------------------------
* APB2CLK (MHz) | 72 | 64
*-----------------------------------------------------------------------------
* USB capable (48 MHz precise clock) | NO | NO
*-----------------------------------------------------------------------------
******************************************************************************
* @attention
*
* <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************
*/
/** @addtogroup CMSIS
* @{
*/
/** @addtogroup stm32f3xx_system
* @{
*/
/** @addtogroup STM32F3xx_System_Private_Includes
* @{
*/
#include "stm32f3xx.h"
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_TypesDefinitions
* @{
*/
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_Defines
* @{
*/
#if !defined (HSE_VALUE)
#define HSE_VALUE ((uint32_t)8000000) /*!< Default value of the External oscillator in Hz.
This value can be provided and adapted by the user application. */
#endif /* HSE_VALUE */
#if !defined (HSI_VALUE)
#define HSI_VALUE ((uint32_t)8000000) /*!< Default value of the Internal oscillator in Hz.
This value can be provided and adapted by the user application. */
#endif /* HSI_VALUE */
/*!< Uncomment the following line if you need to relocate your vector Table in
Internal SRAM. */
/* #define VECT_TAB_SRAM */
#define VECT_TAB_OFFSET 0x0 /*!< Vector Table base offset field.
This value must be a multiple of 0x200. */
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_Macros
* @{
*/
/* Select the clock sources (other than HSI) to start with (0=OFF, 1=ON) */
#define USE_PLL_HSE_EXTC (1) /* Use external clock */
#define USE_PLL_HSE_XTAL (1) /* Use external xtal */
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_Variables
* @{
*/
/* This variable is updated in three ways:
1) by calling CMSIS function SystemCoreClockUpdate()
2) by calling HAL API function HAL_RCC_GetHCLKFreq()
3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
Note: If you use this function to configure the system clock there is no need to
call the 2 first functions listed above, since SystemCoreClock variable is
updated automatically.
*/
uint32_t SystemCoreClock = 72000000;
const uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9};
const uint8_t APBPrescTable[8] = {0, 0, 0, 0, 1, 2, 3, 4};
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_FunctionPrototypes
* @{
*/
#if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0)
uint8_t SetSysClock_PLL_HSE(uint8_t bypass);
#endif
uint8_t SetSysClock_PLL_HSI(void);
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_Functions
* @{
*/
/**
* @brief Setup the microcontroller system
* Initialize the FPU setting, vector table location and the PLL configuration is reset.
* @param None
* @retval None
*/
void SystemInit(void)
{
/* FPU settings ------------------------------------------------------------*/
#if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); /* set CP10 and CP11 Full Access */
#endif
/* Reset the RCC clock configuration to the default reset state ------------*/
/* Set HSION bit */
RCC->CR |= 0x00000001U;
/* Reset CFGR register */
RCC->CFGR &= 0xF87FC00CU;
/* Reset HSEON, CSSON and PLLON bits */
RCC->CR &= 0xFEF6FFFFU;
/* Reset HSEBYP bit */
RCC->CR &= 0xFFFBFFFFU;
/* Reset PLLSRC, PLLXTPRE, PLLMUL and USBPRE bits */
RCC->CFGR &= 0xFF80FFFFU;
/* Reset PREDIV1[3:0] bits */
RCC->CFGR2 &= 0xFFFFFFF0U;
/* Reset USARTSW[1:0], I2CSW and TIMs bits */
RCC->CFGR3 &= 0xFF00FCCCU;
/* Disable all interrupts */
RCC->CIR = 0x00000000U;
#ifdef VECT_TAB_SRAM
SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
#else
SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
#endif
}
/**
* @brief Update SystemCoreClock variable according to Clock Register Values.
* The SystemCoreClock variable contains the core clock (HCLK), it can
* be used by the user application to setup the SysTick timer or configure
* other parameters.
*
* @note Each time the core clock (HCLK) changes, this function must be called
* to update SystemCoreClock variable value. Otherwise, any configuration
* based on this variable will be incorrect.
*
* @note - The system frequency computed by this function is not the real
* frequency in the chip. It is calculated based on the predefined
* constant and the selected clock source:
*
* - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(*)
*
* - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(**)
*
* - If SYSCLK source is PLL, SystemCoreClock will contain the HSE_VALUE(**)
* or HSI_VALUE(*) multiplied/divided by the PLL factors.
*
* (*) HSI_VALUE is a constant defined in stm32f3xx_hal.h file (default value
* 8 MHz) but the real value may vary depending on the variations
* in voltage and temperature.
*
* (**) HSE_VALUE is a constant defined in stm32f3xx_hal.h file (default value
* 8 MHz), user has to ensure that HSE_VALUE is same as the real
* frequency of the crystal used. Otherwise, this function may
* have wrong result.
*
* - The result of this function could be not correct when using fractional
* value for HSE crystal.
*
* @param None
* @retval None
*/
void SystemCoreClockUpdate (void)
{
uint32_t tmp = 0, pllmull = 0, pllsource = 0, predivfactor = 0;
/* Get SYSCLK source -------------------------------------------------------*/
tmp = RCC->CFGR & RCC_CFGR_SWS;
switch (tmp)
{
case RCC_CFGR_SWS_HSI: /* HSI used as system clock */
SystemCoreClock = HSI_VALUE;
break;
case RCC_CFGR_SWS_HSE: /* HSE used as system clock */
SystemCoreClock = HSE_VALUE;
break;
case RCC_CFGR_SWS_PLL: /* PLL used as system clock */
/* Get PLL clock source and multiplication factor ----------------------*/
pllmull = RCC->CFGR & RCC_CFGR_PLLMUL;
pllsource = RCC->CFGR & RCC_CFGR_PLLSRC;
pllmull = ( pllmull >> 18) + 2;
#if defined (STM32F302xE) || defined (STM32F303xE) || defined (STM32F398xx)
predivfactor = (RCC->CFGR2 & RCC_CFGR2_PREDIV) + 1;
if (pllsource == RCC_CFGR_PLLSRC_HSE_PREDIV)
{
/* HSE oscillator clock selected as PREDIV1 clock entry */
SystemCoreClock = (HSE_VALUE / predivfactor) * pllmull;
}
else
{
/* HSI oscillator clock selected as PREDIV1 clock entry */
SystemCoreClock = (HSI_VALUE / predivfactor) * pllmull;
}
#else
if (pllsource == RCC_CFGR_PLLSRC_HSI_DIV2)
{
/* HSI oscillator clock divided by 2 selected as PLL clock entry */
SystemCoreClock = (HSI_VALUE >> 1) * pllmull;
}
else
{
predivfactor = (RCC->CFGR2 & RCC_CFGR2_PREDIV) + 1;
/* HSE oscillator clock selected as PREDIV1 clock entry */
SystemCoreClock = (HSE_VALUE / predivfactor) * pllmull;
}
#endif /* STM32F302xE || STM32F303xE || STM32F398xx */
break;
default: /* HSI used as system clock */
SystemCoreClock = HSI_VALUE;
break;
}
/* Compute HCLK clock frequency ----------------*/
/* Get HCLK prescaler */
tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)];
/* HCLK clock frequency */
SystemCoreClock >>= tmp;
}
/**
* @brief Configures the System clock source, PLL Multiplier and Divider factors,
* AHB/APBx prescalers and Flash settings
* @note This function should be called only once the RCC clock configuration
* is reset to the default reset state (done in SystemInit() function).
* @param None
* @retval None
*/
void SetSysClock(void)
{
/* 1- Try to start with HSE and external clock */
#if USE_PLL_HSE_EXTC != 0
if (SetSysClock_PLL_HSE(1) == 0)
#endif
{
/* 2- If fail try to start with HSE and external xtal */
#if USE_PLL_HSE_XTAL != 0
if (SetSysClock_PLL_HSE(0) == 0)
#endif
{
/* 3- If fail start with HSI clock */
if (SetSysClock_PLL_HSI() == 0)
{
while(1)
{
// [TODO] Put something here to tell the user that a problem occured...
}
}
}
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_SYSCLK, RCC_MCO_DIV1); // 72 MHz or 64 MHz
}
#if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0)
/******************************************************************************/
/* PLL (clocked by HSE) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable HSE oscillator and activate PLL with HSE as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
if (bypass == 0)
{
RCC_OscInitStruct.HSEState = RCC_HSE_ON; /* External 8 MHz xtal on OSC_IN/OSC_OUT */
}
else
{
RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; /* External 8 MHz clock on OSC_IN */
}
RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9; // 72 MHz (8 MHz * 9)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 72 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 72 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 36 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 72 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//if (bypass == 0)
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV2); // 4 MHz with xtal
//else
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV1); // 8 MHz with ext clock
return 1; // OK
}
#endif
/******************************************************************************/
/* PLL (clocked by HSI) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSI(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable HSI oscillator and activate PLL with HSI as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSEState = RCC_HSE_OFF;
RCC_OscInitStruct.HSICalibrationValue = 16;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL16; // 64 MHz (8 MHz/2 * 16)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 64 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 64 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 32 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 64 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSI, RCC_MCO_DIV1); // 8 MHz
return 1; // OK
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

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targets/TARGET_STM/TARGET_STM32F3/TARGET_STM32F334x8/TARGET_NUCLEO_F334R8/system_clock.c Normal file
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/* mbed Microcontroller Library
* Copyright (c) 2006-2017 ARM Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* This file configures the system clock as follows:
*-----------------------------------------------------------------------------
* System clock source | 1- USE_PLL_HSE_EXTC | 3- USE_PLL_HSI
* | (external 8 MHz clock) | (internal 8 MHz)
* | 2- USE_PLL_HSE_XTAL |
* | (external 8 MHz xtal) |
*-----------------------------------------------------------------------------
* SYSCLK(MHz) | 72 | 64
*-----------------------------------------------------------------------------
* AHBCLK (MHz) | 72 | 64
*-----------------------------------------------------------------------------
* APB1CLK (MHz) | 36 | 32
*-----------------------------------------------------------------------------
* APB2CLK (MHz) | 72 | 64
*-----------------------------------------------------------------------------
* USB capable | NO | NO
*-----------------------------------------------------------------------------
*/
#include "stm32f3xx.h"
#include "mbed_assert.h"
/*!< Uncomment the following line if you need to relocate your vector Table in
Internal SRAM. */
/* #define VECT_TAB_SRAM */
#define VECT_TAB_OFFSET 0x0 /*!< Vector Table base offset field.
This value must be a multiple of 0x200. */
// clock source is selected with CLOCK_SOURCE in json config
#define USE_PLL_HSE_EXTC 0x8 // Use external clock (ST Link MCO)
#define USE_PLL_HSE_XTAL 0x4 // Use external xtal (X3 on board - not provided by default)
#define USE_PLL_HSI 0x2 // Use HSI internal clock
#if ( ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) )
uint8_t SetSysClock_PLL_HSE(uint8_t bypass);
#endif /* ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) */
#if ((CLOCK_SOURCE) & USE_PLL_HSI)
uint8_t SetSysClock_PLL_HSI(void);
#endif /* ((CLOCK_SOURCE) & USE_PLL_HSI) */
/**
* @brief Setup the microcontroller system
* Initialize the FPU setting, vector table location and the PLL configuration is reset.
* @param None
* @retval None
*/
void SystemInit(void)
{
/* FPU settings ------------------------------------------------------------*/
#if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); /* set CP10 and CP11 Full Access */
#endif
/* Reset the RCC clock configuration to the default reset state ------------*/
/* Set HSION bit */
RCC->CR |= 0x00000001U;
/* Reset CFGR register */
RCC->CFGR &= 0xF87FC00CU;
/* Reset HSEON, CSSON and PLLON bits */
RCC->CR &= 0xFEF6FFFFU;
/* Reset HSEBYP bit */
RCC->CR &= 0xFFFBFFFFU;
/* Reset PLLSRC, PLLXTPRE, PLLMUL and USBPRE bits */
RCC->CFGR &= 0xFF80FFFFU;
/* Reset PREDIV1[3:0] bits */
RCC->CFGR2 &= 0xFFFFFFF0U;
/* Reset USARTSW[1:0], I2CSW and TIMs bits */
RCC->CFGR3 &= 0xFF00FCCCU;
/* Disable all interrupts */
RCC->CIR = 0x00000000U;
#ifdef VECT_TAB_SRAM
SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
#else
SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
#endif
}
/**
* @brief Configures the System clock source, PLL Multiplier and Divider factors,
* AHB/APBx prescalers and Flash settings
* @note This function should be called only once the RCC clock configuration
* is reset to the default reset state (done in SystemInit() function).
* @param None
* @retval None
*/
void SetSysClock(void)
{
#if ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC)
/* 1- Try to start with HSE and external clock */
if (SetSysClock_PLL_HSE(1) == 0)
#endif
{
#if ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL)
/* 2- If fail try to start with HSE and external xtal */
if (SetSysClock_PLL_HSE(0) == 0)
#endif
{
#if ((CLOCK_SOURCE) & USE_PLL_HSI)
/* 3- If fail start with HSI clock */
if (SetSysClock_PLL_HSI() == 0)
#endif
{
while(1) {
MBED_ASSERT(1);
}
}
}
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_SYSCLK, RCC_MCO_DIV1); // 72 MHz or 64 MHz
}
#if ( ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) )
/******************************************************************************/
/* PLL (clocked by HSE) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable HSE oscillator and activate PLL with HSE as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
if (bypass == 0) {
RCC_OscInitStruct.HSEState = RCC_HSE_ON; /* External 8 MHz xtal on OSC_IN/OSC_OUT */
} else {
RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; /* External 8 MHz clock on OSC_IN */
}
RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9; // 72 MHz (8 MHz * 9)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 72 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 72 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 36 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 72 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//if (bypass == 0)
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV2); // 4 MHz with xtal
//else
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV1); // 8 MHz with ext clock
return 1; // OK
}
#endif /* ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) */
#if ((CLOCK_SOURCE) & USE_PLL_HSI)
/******************************************************************************/
/* PLL (clocked by HSI) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSI(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable HSI oscillator and activate PLL with HSI as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSEState = RCC_HSE_OFF;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL16; // 64 MHz (8 MHz/2 * 16)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 64 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 64 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 32 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 64 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSI, RCC_MCO_DIV1); // 8 MHz
return 1; // OK
}
#endif /* ((CLOCK_SOURCE) & USE_PLL_HSI) */

446
targets/TARGET_STM/TARGET_STM32F3/TARGET_STM32F334x8/TARGET_NUCLEO_F334R8/system_stm32f3xx.c
View File

@ -1,446 +0,0 @@
/**
******************************************************************************
* @file system_stm32f3xx.c
* @author MCD Application Team
* @version V2.3.1
* @date 16-December-2016
* @brief CMSIS Cortex-M4 Device Peripheral Access Layer System Source File.
*
* 1. This file provides two functions and one global variable to be called from
* user application:
* - SystemInit(): This function is called at startup just after reset and
* before branch to main program. This call is made inside
* the "startup_stm32f3xx.s" file.
*
* - SystemCoreClock variable: Contains the core clock (HCLK), it can be used
* by the user application to setup the SysTick
* timer or configure other parameters.
*
* - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must
* be called whenever the core clock is changed
* during program execution.
*
* 2. After each device reset the HSI (8 MHz) is used as system clock source.
* Then SystemInit() function is called, in "startup_stm32f3xx.s" file, to
* configure the system clock before to branch to main program.
*
* 3. This file configures the system clock as follows:
*-----------------------------------------------------------------------------
* System clock source | 1- PLL_HSE_EXTC | 3- PLL_HSI
* | (external 8 MHz clock) | (internal 8 MHz)
* | 2- PLL_HSE_XTAL |
* | (external 8 MHz xtal) |
*-----------------------------------------------------------------------------
* SYSCLK(MHz) | 72 | 64
*-----------------------------------------------------------------------------
* AHBCLK (MHz) | 72 | 64
*-----------------------------------------------------------------------------
* APB1CLK (MHz) | 36 | 32
*-----------------------------------------------------------------------------
* APB2CLK (MHz) | 72 | 64
*-----------------------------------------------------------------------------
* USB capable (48 MHz precise clock) | NO | NO
*-----------------------------------------------------------------------------
******************************************************************************
* @attention
*
* <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************
*/
/** @addtogroup CMSIS
* @{
*/
/** @addtogroup stm32f3xx_system
* @{
*/
/** @addtogroup STM32F3xx_System_Private_Includes
* @{
*/
#include "stm32f3xx.h"
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_TypesDefinitions
* @{
*/
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_Defines
* @{
*/
#if !defined (HSE_VALUE)
#define HSE_VALUE ((uint32_t)8000000) /*!< Default value of the External oscillator in Hz.
This value can be provided and adapted by the user application. */
#endif /* HSE_VALUE */
#if !defined (HSI_VALUE)
#define HSI_VALUE ((uint32_t)8000000) /*!< Default value of the Internal oscillator in Hz.
This value can be provided and adapted by the user application. */
#endif /* HSI_VALUE */
/*!< Uncomment the following line if you need to relocate your vector Table in
Internal SRAM. */
/* #define VECT_TAB_SRAM */
#define VECT_TAB_OFFSET 0x0 /*!< Vector Table base offset field.
This value must be a multiple of 0x200. */
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_Macros
* @{
*/
/* Select the clock sources (other than HSI) to start with (0=OFF, 1=ON) */
#define USE_PLL_HSE_EXTC (1) /* Use external clock */
#define USE_PLL_HSE_XTAL (1) /* Use external xtal */
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_Variables
* @{
*/
/* This variable is updated in three ways:
1) by calling CMSIS function SystemCoreClockUpdate()
2) by calling HAL API function HAL_RCC_GetHCLKFreq()
3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
Note: If you use this function to configure the system clock there is no need to
call the 2 first functions listed above, since SystemCoreClock variable is
updated automatically.
*/
uint32_t SystemCoreClock = 72000000;
const uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9};
const uint8_t APBPrescTable[8] = {0, 0, 0, 0, 1, 2, 3, 4};
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_FunctionPrototypes
* @{
*/
#if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0)
uint8_t SetSysClock_PLL_HSE(uint8_t bypass);
#endif
uint8_t SetSysClock_PLL_HSI(void);
/**
* @}
*/
/** @addtogroup STM32F3xx_System_Private_Functions
* @{
*/
/**
* @brief Setup the microcontroller system
* Initialize the FPU setting, vector table location and the PLL configuration is reset.
* @param None
* @retval None
*/
void SystemInit(void)
{
/* FPU settings ------------------------------------------------------------*/
#if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); /* set CP10 and CP11 Full Access */
#endif
/* Reset the RCC clock configuration to the default reset state ------------*/
/* Set HSION bit */
RCC->CR |= 0x00000001U;
/* Reset CFGR register */
RCC->CFGR &= 0xF87FC00CU;
/* Reset HSEON, CSSON and PLLON bits */
RCC->CR &= 0xFEF6FFFFU;
/* Reset HSEBYP bit */
RCC->CR &= 0xFFFBFFFFU;
/* Reset PLLSRC, PLLXTPRE, PLLMUL and USBPRE bits */
RCC->CFGR &= 0xFF80FFFFU;
/* Reset PREDIV1[3:0] bits */
RCC->CFGR2 &= 0xFFFFFFF0U;
/* Reset USARTSW[1:0], I2CSW and TIMs bits */
RCC->CFGR3 &= 0xFF00FCCCU;
/* Disable all interrupts */
RCC->CIR = 0x00000000U;
#ifdef VECT_TAB_SRAM
SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
#else
SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
#endif
}
/**
* @brief Update SystemCoreClock variable according to Clock Register Values.
* The SystemCoreClock variable contains the core clock (HCLK), it can
* be used by the user application to setup the SysTick timer or configure
* other parameters.
*
* @note Each time the core clock (HCLK) changes, this function must be called
* to update SystemCoreClock variable value. Otherwise, any configuration
* based on this variable will be incorrect.
*
* @note - The system frequency computed by this function is not the real
* frequency in the chip. It is calculated based on the predefined
* constant and the selected clock source:
*
* - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(*)
*
* - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(**)
*
* - If SYSCLK source is PLL, SystemCoreClock will contain the HSE_VALUE(**)
* or HSI_VALUE(*) multiplied/divided by the PLL factors.
*
* (*) HSI_VALUE is a constant defined in stm32f3xx_hal.h file (default value
* 8 MHz) but the real value may vary depending on the variations
* in voltage and temperature.
*
* (**) HSE_VALUE is a constant defined in stm32f3xx_hal.h file (default value
* 8 MHz), user has to ensure that HSE_VALUE is same as the real
* frequency of the crystal used. Otherwise, this function may
* have wrong result.
*
* - The result of this function could be not correct when using fractional
* value for HSE crystal.
*
* @param None
* @retval None
*/
void SystemCoreClockUpdate (void)
{
uint32_t tmp = 0, pllmull = 0, pllsource = 0, predivfactor = 0;
/* Get SYSCLK source -------------------------------------------------------*/
tmp = RCC->CFGR & RCC_CFGR_SWS;
switch (tmp)
{
case RCC_CFGR_SWS_HSI: /* HSI used as system clock */
SystemCoreClock = HSI_VALUE;
break;
case RCC_CFGR_SWS_HSE: /* HSE used as system clock */
SystemCoreClock = HSE_VALUE;
break;
case RCC_CFGR_SWS_PLL: /* PLL used as system clock */
/* Get PLL clock source and multiplication factor ----------------------*/
pllmull = RCC->CFGR & RCC_CFGR_PLLMUL;
pllsource = RCC->CFGR & RCC_CFGR_PLLSRC;
pllmull = ( pllmull >> 18) + 2;
#if defined (STM32F302xE) || defined (STM32F303xE) || defined (STM32F398xx)
predivfactor = (RCC->CFGR2 & RCC_CFGR2_PREDIV) + 1;
if (pllsource == RCC_CFGR_PLLSRC_HSE_PREDIV)
{
/* HSE oscillator clock selected as PREDIV1 clock entry */
SystemCoreClock = (HSE_VALUE / predivfactor) * pllmull;
}
else
{
/* HSI oscillator clock selected as PREDIV1 clock entry */
SystemCoreClock = (HSI_VALUE / predivfactor) * pllmull;
}
#else
if (pllsource == RCC_CFGR_PLLSRC_HSI_DIV2)
{
/* HSI oscillator clock divided by 2 selected as PLL clock entry */
SystemCoreClock = (HSI_VALUE >> 1) * pllmull;
}
else
{
predivfactor = (RCC->CFGR2 & RCC_CFGR2_PREDIV) + 1;
/* HSE oscillator clock selected as PREDIV1 clock entry */
SystemCoreClock = (HSE_VALUE / predivfactor) * pllmull;
}
#endif /* STM32F302xE || STM32F303xE || STM32F398xx */
break;
default: /* HSI used as system clock */
SystemCoreClock = HSI_VALUE;
break;
}
/* Compute HCLK clock frequency ----------------*/
/* Get HCLK prescaler */
tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)];
/* HCLK clock frequency */
SystemCoreClock >>= tmp;
}
/**
* @brief Configures the System clock source, PLL Multiplier and Divider factors,
* AHB/APBx prescalers and Flash settings
* @note This function should be called only once the RCC clock configuration
* is reset to the default reset state (done in SystemInit() function).
* @param None
* @retval None
*/
void SetSysClock(void)
{
/* 1- Try to start with HSE and external clock */
#if USE_PLL_HSE_EXTC != 0
if (SetSysClock_PLL_HSE(1) == 0)
#endif
{
/* 2- If fail try to start with HSE and external xtal */
#if USE_PLL_HSE_XTAL != 0
if (SetSysClock_PLL_HSE(0) == 0)
#endif
{
/* 3- If fail start with HSI clock */
if (SetSysClock_PLL_HSI() == 0)
{
while(1)
{
// [TODO] Put something here to tell the user that a problem occured...
}
}
}
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_SYSCLK, RCC_MCO_DIV1); // 72 MHz or 64 MHz
}
#if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0)
/******************************************************************************/
/* PLL (clocked by HSE) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable HSE oscillator and activate PLL with HSE as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
if (bypass == 0)
{
RCC_OscInitStruct.HSEState = RCC_HSE_ON; /* External 8 MHz xtal on OSC_IN/OSC_OUT */
}
else
{
RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; /* External 8 MHz clock on OSC_IN */
}
RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9; // 72 MHz (8 MHz * 9)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 72 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 72 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 36 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 72 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//if (bypass == 0)
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV2); // 4 MHz with xtal
//else
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV1); // 8 MHz with ext clock
return 1; // OK
}
#endif
/******************************************************************************/
/* PLL (clocked by HSI) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSI(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable HSI oscillator and activate PLL with HSI as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSEState = RCC_HSE_OFF;
RCC_OscInitStruct.HSICalibrationValue = 16;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL16; // 64 MHz (8 MHz/2 * 16)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 64 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 64 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 32 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 64 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSI, RCC_MCO_DIV1); // 8 MHz
return 1; // OK
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

164
targets/TARGET_STM/TARGET_STM32F3/TARGET_STM32F303x8/device/system_stm32f3xx.c → targets/TARGET_STM/TARGET_STM32F3/device/system_stm32f3xx.c
View File

@ -25,22 +25,24 @@
* configure the system clock before to branch to main program.
*
* 3. This file configures the system clock as follows:
*=============================================================================
* Supported STM32F3xx device
*-----------------------------------------------------------------------------
* System clock source | 1- PLL_HSE_EXTC | 3- PLL_HSI
* | (external 8 MHz clock) | (internal 8 MHz)
* | 2- PLL_HSE_XTAL |
* | (external 8 MHz xtal) |
* System Clock source | HSI
*-----------------------------------------------------------------------------
* SYSCLK(MHz) | 72 | 64
* SYSCLK(Hz) | 8000000
*-----------------------------------------------------------------------------
* AHBCLK (MHz) | 72 | 64
* HCLK(Hz) | 8000000
*-----------------------------------------------------------------------------
* APB1CLK (MHz) | 36 | 32
* AHB Prescaler | 1
*-----------------------------------------------------------------------------
* APB2CLK (MHz) | 72 | 64
* APB2 Prescaler | 1
*-----------------------------------------------------------------------------
* USB capable (48 MHz precise clock) | NO | NO
* APB1 Prescaler | 1
*-----------------------------------------------------------------------------
* USB Clock | DISABLE
*-----------------------------------------------------------------------------
*=============================================================================
******************************************************************************
* @attention
*
@ -85,7 +87,6 @@
#include "stm32f3xx.h"
/**
* @}
*/
@ -124,10 +125,6 @@
* @{
*/
/* Select the clock sources (other than HSI) to start with (0=OFF, 1=ON) */
#define USE_PLL_HSE_EXTC (0) /* Use external clock */
#define USE_PLL_HSE_XTAL (0) /* Use external xtal */
/**
* @}
*/
@ -143,7 +140,8 @@
call the 2 first functions listed above, since SystemCoreClock variable is
updated automatically.
*/
uint32_t SystemCoreClock = 72000000;
uint32_t SystemCoreClock = 8000000;
const uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9};
const uint8_t APBPrescTable[8] = {0, 0, 0, 0, 1, 2, 3, 4};
@ -155,12 +153,6 @@ const uint8_t APBPrescTable[8] = {0, 0, 0, 0, 1, 2, 3, 4};
* @{
*/
#if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0)
uint8_t SetSysClock_PLL_HSE(uint8_t bypass);
#endif
uint8_t SetSysClock_PLL_HSI(void);
/**
* @}
*/
@ -169,6 +161,10 @@ uint8_t SetSysClock_PLL_HSI(void);
* @{
*/
/*+ MBED */
#if 0
/*- MBED */
/**
* @brief Setup the microcontroller system
* Initialize the FPU setting, vector table location and the PLL configuration is reset.
@ -212,9 +208,12 @@ void SystemInit(void)
#else
SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
#endif
}
/*+ MBED */
#endif
/*- MBED */
/**
* @brief Update SystemCoreClock variable according to Clock Register Values.
* The SystemCoreClock variable contains the core clock (HCLK), it can
@ -309,127 +308,6 @@ void SystemCoreClockUpdate (void)
SystemCoreClock >>= tmp;
}
/**
* @brief Configures the System clock source, PLL Multiplier and Divider factors,
* AHB/APBx prescalers and Flash settings
* @note This function should be called only once the RCC clock configuration
* is reset to the default reset state (done in SystemInit() function).
* @param None
* @retval None
*/
void SetSysClock(void)
{
/* 1- Try to start with HSE and external clock */
#if USE_PLL_HSE_EXTC != 0
if (SetSysClock_PLL_HSE(1) == 0)
#endif
{
/* 2- If fail try to start with HSE and external xtal */
#if USE_PLL_HSE_XTAL != 0
if (SetSysClock_PLL_HSE(0) == 0)
#endif
{
/* 3- If fail start with HSI clock */
if (SetSysClock_PLL_HSI() == 0)
{
while(1)
{
// [TODO] Put something here to tell the user that a problem occured...
}
}
}
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_SYSCLK, RCC_MCO_DIV1); // 72 MHz or 64 MHz
}
#if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0)
/******************************************************************************/
/* PLL (clocked by HSE) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable HSE oscillator and activate PLL with HSE as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
if (bypass == 0)
{
RCC_OscInitStruct.HSEState = RCC_HSE_ON; /* External 8 MHz xtal on OSC_IN/OSC_OUT */
}
else
{
RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; /* External 8 MHz clock on OSC_IN */
}
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9; // 72 MHz (8 MHz * 9)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 72 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 72 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 36 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 72 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//if (bypass == 0)
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV2); // 4 MHz with xtal
//else
// HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV1); // 8 MHz with ext clock
return 1; // OK
}
#endif
/******************************************************************************/
/* PLL (clocked by HSI) used as System clock source */
/******************************************************************************/
uint8_t SetSysClock_PLL_HSI(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable HSI oscillator and activate PLL with HSI as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSEState = RCC_HSE_OFF;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL16; // 64 MHz (8 MHz/2 * 16)
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
return 0; // FAIL
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 64 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 64 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 32 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 64 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSI, RCC_MCO_DIV1); // 8 MHz
return 1; // OK
}
/**
* @}
*/

42
targets/targets.json
View File

@ -840,6 +840,13 @@
"supported_form_factors": ["ARDUINO", "MORPHO"],
"core": "Cortex-M4F",
"extra_labels_add": ["STM32F3", "STM32F302x8", "STM32F302R8"],
"config": {
"clock_source": {
"help": "Mask value : USE_PLL_HSE_EXTC | USE_PLL_HSE_XTAL (need HW patch) | USE_PLL_HSI",
"value": "USE_PLL_HSE_EXTC|USE_PLL_HSE_XTAL|USE_PLL_HSI",
"macro_name": "CLOCK_SOURCE"
}
},
"detect_code": ["0705"],
"device_has_add": ["ANALOGOUT", "CAN", "LOWPOWERTIMER", "SERIAL_ASYNCH", "SERIAL_FC"],
"default_lib": "small",
@ -852,6 +859,13 @@
"core": "Cortex-M4F",
"extra_labels_add": ["STM32F3", "STM32F303x8", "STM32F303K8"],
"macros_add": ["RTC_LSI=1"],
"config": {
"clock_source": {
"help": "Mask value : USE_PLL_HSE_EXTC | USE_PLL_HSE_XTAL (need HW patch) | USE_PLL_HSI",
"value": "USE_PLL_HSI",
"macro_name": "CLOCK_SOURCE"
}
},
"detect_code": ["0775"],
"default_lib": "small",
"device_has_add": ["ANALOGOUT", "CAN", "LOWPOWERTIMER", "SERIAL_FC"],
@ -863,6 +877,13 @@
"supported_form_factors": ["ARDUINO", "MORPHO"],
"core": "Cortex-M4F",
"extra_labels_add": ["STM32F3", "STM32F303xE", "STM32F303RE"],
"config": {
"clock_source": {
"help": "Mask value : USE_PLL_HSE_EXTC | USE_PLL_HSE_XTAL (need HW patch) | USE_PLL_HSI",
"value": "USE_PLL_HSE_EXTC|USE_PLL_HSE_XTAL|USE_PLL_HSI",
"macro_name": "CLOCK_SOURCE"
}
},
"detect_code": ["0745"],
"device_has_add": ["ANALOGOUT", "CAN", "LOWPOWERTIMER", "SERIAL_ASYNCH", "SERIAL_FC"],
"release_versions": ["2", "5"],
@ -873,6 +894,13 @@
"supported_form_factors": ["ARDUINO", "MORPHO"],
"core": "Cortex-M4F",
"extra_labels_add": ["STM32F3", "STM32F303xE", "STM32F303ZE"],
"config": {
"clock_source": {
"help": "Mask value : USE_PLL_HSE_EXTC | USE_PLL_HSE_XTAL (need HW patch) | USE_PLL_HSI",
"value": "USE_PLL_HSE_EXTC|USE_PLL_HSE_XTAL|USE_PLL_HSI",
"macro_name": "CLOCK_SOURCE"
}
},
"detect_code": ["0747"],
"device_has_add": ["ANALOGOUT", "CAN", "LOWPOWERTIMER"],
"release_versions": ["2", "5"],
@ -883,6 +911,13 @@
"supported_form_factors": ["ARDUINO", "MORPHO"],
"core": "Cortex-M4F",
"extra_labels_add": ["STM32F3", "STM32F334x8", "STM32F334R8"],
"config": {
"clock_source": {
"help": "Mask value : USE_PLL_HSE_EXTC | USE_PLL_HSE_XTAL (need HW patch) | USE_PLL_HSI",
"value": "USE_PLL_HSE_EXTC|USE_PLL_HSE_XTAL|USE_PLL_HSI",
"macro_name": "CLOCK_SOURCE"
}
},
"detect_code": ["0735"],
"device_has_add": ["ANALOGOUT", "CAN", "LOWPOWERTIMER", "SERIAL_ASYNCH", "SERIAL_FC"],
"default_lib": "small",
@ -1303,6 +1338,13 @@
"core": "Cortex-M4F",
"extra_labels_add": ["STM32F3", "STM32F334x8","STM32F334C8"],
"macros_add": ["RTC_LSI=1"],
"config": {
"clock_source": {
"help": "Mask value : USE_PLL_HSE_EXTC | USE_PLL_HSE_XTAL (need HW patch) | USE_PLL_HSI",
"value": "USE_PLL_HSE_EXTC|USE_PLL_HSE_XTAL|USE_PLL_HSI",
"macro_name": "CLOCK_SOURCE"
}
},
"detect_code": ["0810"],
"device_has_add": ["ANALOGOUT", "LOWPOWERTIMER", "SERIAL_ASYNCH", "SERIAL_FC"],
"default_lib": "small",