ARMmbed
/
mbed-os
mirror of https://github.com/ARMmbed/mbed-os.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

[NUCLEO_F746ZG] 8MHz, not 25

pull/1567/merge
adustm 2016-01-21 09:37:21 +01:00 committed by 0xc0170
parent ddea20a775
commit d47d87c869
2 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
libraries/mbed/targets/cmsis/TARGET_STM/TARGET_STM32F7/TARGET_NUCLEO_F746ZG/stm32f7xx_hal_conf.h
View File

@ -102,7 +102,7 @@
* (when HSE is used as system clock source, directly or through the PLL).
*/
#if !defined (HSE_VALUE)
#define HSE_VALUE ((uint32_t)25000000) /*!< Value of the External oscillator in Hz */
#define HSE_VALUE ((uint32_t)8000000) /*!< Value of the External oscillator in Hz */
#endif /* HSE_VALUE */
#if !defined (HSE_STARTUP_TIMEOUT)

6
libraries/mbed/targets/cmsis/TARGET_STM/TARGET_STM32F7/TARGET_NUCLEO_F746ZG/system_stm32f7xx.c
View File

@ -133,7 +133,7 @@ HAL_StatusTypeDef HAL_Init(void);
*/
/* Select the clock sources (other than HSI) to start with (0=OFF, 1=ON) */
#define USE_PLL_HSE_EXTC (0) /* Use external clock --> NOT USED ON THIS BOARD */
#define USE_PLL_HSE_EXTC (1) /* Use external clock --> NOT USED ON THIS BOARD */
#define USE_PLL_HSE_XTAL (1) /* Use external xtal */
/**
@ -607,10 +607,10 @@ uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
{
RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; /* External clock on OSC_IN */
}
// Warning: this configuration is for a 25 MHz xtal clock only
// Warning: this configuration is for a 8 MHz xtal clock only
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 25; // VCO input clock = 1 MHz (25 MHz / 25)
RCC_OscInitStruct.PLL.PLLM = 8; // VCO input clock = 1 MHz (8 MHz / 8)
RCC_OscInitStruct.PLL.PLLN = 432; // VCO output clock = 432 MHz (1 MHz * 432)
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; // PLLCLK = 216 MHz (432 MHz / 2)
RCC_OscInitStruct.PLL.PLLQ = 9; // USB clock = 48 MHz (432 MHz / 9) --> OK for USB