mirror of https://github.com/ARMmbed/mbed-os.git
Adding support for NUCLEO_G431KB. Created this file based on G474RE file. Added support for USB - connected the HSI48 clock to USB (and RNG). Warning: I'm assuming Flash latency is the same as for G474RE.
Tauno Magnusson
parent
70bd5b916d
commit
5bd272aabc
|
|
@ -0,0 +1,208 @@
|
|||
/* mbed Microcontroller Library
|
||||
* SPDX-License-Identifier: BSD-3-Clause
|
||||
******************************************************************************
|
||||
*
|
||||
* Copyright (c) 2019 STMicroelectronics.
|
||||
* All rights reserved.
|
||||
*
|
||||
* This software component is licensed by ST under BSD 3-Clause license,
|
||||
* the "License"; You may not use this file except in compliance with the
|
||||
* License. You may obtain a copy of the License at:
|
||||
* opensource.org/licenses/BSD-3-Clause
|
||||
*
|
||||
******************************************************************************
|
||||
*/
|
||||
|
||||
/**
|
||||
* 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 16 MHz)
|
||||
*-----------------------------------------------------------------
|
||||
* SYSCLK(MHz) | 64
|
||||
* AHBCLK (MHz) | 64
|
||||
* APB1CLK (MHz) | 64
|
||||
* USB capable | NO
|
||||
*-----------------------------------------------------------------
|
||||
*/
|
||||
|
||||
#include "stm32g4xx.h"
|
||||
#include "mbed_error.h"
|
||||
|
||||
/*!< Uncomment the following line if you need to relocate your vector Table in
|
||||
Internal SRAM. */
|
||||
/* #define VECT_TAB_SRAM */
|
||||
#define VECT_TAB_OFFSET 0x00U /*!< Vector Table base offset field.
|
||||
This value must be a multiple of 0x100. */
|
||||
|
||||
#define USE_PLL_HSE_EXTC 0x8 // Use external clock (ST Link MCO)
|
||||
#define USE_PLL_HSE_XTAL 0x4 // Use external xtal (X3 on board)
|
||||
#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 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
|
||||
{
|
||||
{
|
||||
error("SetSysClock failed\n");
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* Output clock on MCO1 pin(PA8) for debugging purpose */
|
||||
//HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_SYSCLK, RCC_MCODIV_1);
|
||||
//HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSI48, RCC_MCODIV_1);
|
||||
}
|
||||
|
||||
#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_OscInitTypeDef RCC_OscInitStruct = {0};
|
||||
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
|
||||
RCC_PeriphCLKInitTypeDef RCC_PeriphCLKInitStruct = { 0 };
|
||||
|
||||
/** Configure the main internal regulator output voltage
|
||||
*/
|
||||
HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1_BOOST);
|
||||
/** Initializes the CPU, AHB and APB busses clocks
|
||||
*/
|
||||
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
|
||||
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
|
||||
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
|
||||
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
|
||||
RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV6;
|
||||
//! 170MHz as a core frequency for FDCAN is not suitable for many frequencies,
|
||||
//! as it provides low accuracy. When no FDCAN is used, the full capacity of 170 MHz
|
||||
//! should be standard.
|
||||
#if DEVICE_CAN
|
||||
RCC_OscInitStruct.PLL.PLLN = 80;
|
||||
#else
|
||||
RCC_OscInitStruct.PLL.PLLN = 85;
|
||||
#endif
|
||||
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
|
||||
RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
|
||||
RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
|
||||
|
||||
// For USB: Default to USB driven by HSI48 Clock. (USB needs a 48 MHz Clock).
|
||||
// Code below enables the HSI48 Clock
|
||||
// (Sidenote: RNG is also driven (and according to STM specs) verified with the 48MHz HSI48)
|
||||
RCC_OscInitStruct.OscillatorType |= RCC_OSCILLATORTYPE_HSI48;
|
||||
RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
|
||||
|
||||
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
|
||||
return 0; // FAIL
|
||||
}
|
||||
|
||||
// For USB: Default to USB driven by HSI48 Clock.
|
||||
// Code below connects USB (and RNG) to the HSI48 Clock.
|
||||
RCC_PeriphCLKInitStruct.PeriphClockSelection = RCC_PERIPHCLK_USB;
|
||||
RCC_PeriphCLKInitStruct.UsbClockSelection = RCC_USBCLKSOURCE_HSI48;
|
||||
if (HAL_RCCEx_PeriphCLKConfig(&RCC_PeriphCLKInitStruct) != HAL_OK) {
|
||||
return 0; // FAIL
|
||||
}
|
||||
|
||||
/** Initializes the CPU, AHB and APB busses clocks
|
||||
*/
|
||||
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
|
||||
| RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
|
||||
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
|
||||
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
|
||||
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
|
||||
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
|
||||
|
||||
// This is an assumption: Using same Flash Latency as for G474RE
|
||||
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_8) != HAL_OK) {
|
||||
return 0; // FAIL
|
||||
}
|
||||
|
||||
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_OscInitTypeDef RCC_OscInitStruct = {0};
|
||||
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
|
||||
RCC_PeriphCLKInitTypeDef RCC_PeriphCLKInitStruct = { 0 };
|
||||
|
||||
/** Configure the main internal regulator output voltage
|
||||
*/
|
||||
HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);
|
||||
/** Initializes the CPU, AHB and APB busses clocks
|
||||
*/
|
||||
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
|
||||
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
|
||||
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
|
||||
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
|
||||
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
|
||||
RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV4;
|
||||
RCC_OscInitStruct.PLL.PLLN = 85;
|
||||
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
|
||||
RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
|
||||
RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
|
||||
RCC_OscInitStruct.OscillatorType |= RCC_OSCILLATORTYPE_HSI48; // Enable HSI48 and feed it to USB/RNG.
|
||||
RCC_OscInitStruct.HSI48State = RCC_HSI48_ON; // USB needs - and RNG is verified with - the 48Mhz HSI48.
|
||||
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
|
||||
return 0; // FAIL
|
||||
}
|
||||
RCC_PeriphCLKInitStruct.PeriphClockSelection = RCC_PERIPHCLK_USB; // Connect HSI48 clock to USB (and RNG)
|
||||
RCC_PeriphCLKInitStruct.UsbClockSelection = RCC_USBCLKSOURCE_HSI48;
|
||||
if (HAL_RCCEx_PeriphCLKConfig(&RCC_PeriphCLKInitStruct) != HAL_OK) {
|
||||
return 0; // FAIL
|
||||
}
|
||||
|
||||
/** Initializes the CPU, AHB and APB busses clocks
|
||||
*/
|
||||
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
|
||||
| RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
|
||||
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
|
||||
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
|
||||
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
|
||||
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
|
||||
|
||||
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_8) != HAL_OK) {
|
||||
return 0; // FAIL
|
||||
}
|
||||
|
||||
return 1; // OK
|
||||
}
|
||||
#endif /* ((CLOCK_SOURCE) & USE_PLL_HSI) */
|
||||
Loading…
Reference in New Issue