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canable-fw-normaldotcom
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Add defines to choose between internal and external oscillator

This commit is contained in:
Ethan Zonca 2015-06-10 08:33:37 -04:00
parent 52803f72f5
commit f74e3c0c2a
1 changed files with 16 additions and 0 deletions
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16
Src/main.c
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@ -41,6 +41,9 @@
#include "can.h"
#include "slcan.h"
#define INTERNAL_OSCILLATOR
//#define EXTERNAL_OSCILLATOR
/* USER CODE END Includes */
/* Private variables ---------------------------------------------------------*/
@ -125,12 +128,25 @@ void SystemClock_Config(void)
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_PeriphCLKInitTypeDef PeriphClkInit;
#ifdef EXTERNAL_OSCILLATOR
// set up the oscillators
// use external oscillator (16 MHz), enable 3x PLL (48 MHz)
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI48;
RCC_OscInitStruct.HSI48State = RCC_HSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
HAL_RCC_OscConfig(&RCC_OscInitStruct);
#elif defined INTERNAL_OSCILLATOR
// set up the oscillators
// use external oscillator (16 MHz), enable 3x PLL (48 MHz)
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.PLLMUL = RCC_PLL_MUL3;
RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV1;
#else
#error "Please define whether to use an internal or external oscillator"
#endif
// set sysclk, hclk, and pclk1 source to PLL (48 MHz)
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK |