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[bsp] update RCC initial for system 

* set internal oscillator trimming value to default
  * replace integer constant by macro from HAL library
  * remove SystemCoreClockUpdate() because "SystemCoreClock" updated in HAL_RCC_ClockConfig()
  * remove delay()
This commit is contained in:
tanek liang 2017-06-13 23:44:45 +08:00
parent a453b3318b
commit f537194d01
1 changed files with 18 additions and 22 deletions
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40
bsp/stm32l072/board/board.c
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@ -40,18 +40,10 @@ void NVIC_Configuration(void)
// NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
}
/**
* @brief Inserts a delay time.
* @param nCount: specifies the delay time length.
* @retval None
*/
static void Delay(__IO uint32_t nCount)
void error_handler(void)
{
/* Decrement nCount value */
while (nCount != 0)
{
nCount--;
}
rt_kprintf("error_handler\n");
while(1);
}
/**
@ -63,32 +55,36 @@ static void Delay(__IO uint32_t nCount)
*/
static void RCC_Configuration(void)
{
RCC_OscInitTypeDef OscInit;
RCC_ClkInitTypeDef ClkInit = {0};
RCC_OscInitTypeDef OscInit = {0};
HAL_RCC_DeInit();
/* Enable HSI Oscillator and Activate PLL with HSI as source */
OscInit.OscillatorType = RCC_OSCILLATORTYPE_HSI;
OscInit.HSIState = RCC_HSI_ON;
OscInit.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
OscInit.PLL.PLLState = RCC_PLL_ON;
OscInit.PLL.PLLDIV = RCC_PLLDIV_2;
OscInit.PLL.PLLMUL = RCC_PLLMUL_4;
OscInit.PLL.PLLSource = RCC_PLLSOURCE_HSI;
HAL_RCC_OscConfig(&OscInit);
RCC_ClkInitTypeDef ClkInit;
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
clocks dividers */
ClkInit.ClockType = RCC_CLOCKTYPE_SYSCLK |
RCC_CLOCKTYPE_HCLK |
RCC_CLOCKTYPE_PCLK1 |
RCC_CLOCKTYPE_PCLK2;
ClkInit.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
ClkInit.AHBCLKDivider = 0;
ClkInit.APB1CLKDivider = 0;
ClkInit.APB2CLKDivider = 0;
HAL_RCC_ClockConfig(&ClkInit, 1);
Delay(0x3FFFF);
/* Update SystemCoreClock value from RCC configure */
SystemCoreClockUpdate();
ClkInit.AHBCLKDivider = RCC_SYSCLK_DIV1;
ClkInit.APB1CLKDivider = RCC_HCLK_DIV1;
ClkInit.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&ClkInit, FLASH_LATENCY_1) != HAL_OK)
{
error_handler();
}
}
#ifdef PRINT_RCC_FREQ_INFO