stm32f407 hal库如何启用HSI

只看该作者 · 2019-7-31 13:18

RCC_OscInitStructure.OscillatorType=RCC_OSCILLATORTYPE_HSI; //时钟源为HSE
RCC_OscInitStructure.HSEState=RCC_HSI_ON;                   //打开HSE
RCC_OscInitStructure.PLL.PLLState=RCC_PLL_ON;//打开PLL
RCC_OscInitStructure.PLL.PLLSource=RCC_PLLSOURCE_HSI;//PLL时钟源选择HSE
RCC_OscInitStructure.PLL.PLLM=16; //主PLL和音频PLL分频系数(PLL之前的分频),取值范围:2~63.
RCC_OscInitStructure.PLL.PLLN=plln; //主PLL倍频系数(PLL倍频),取值范围:64~432.
RCC_OscInitStructure.PLL.PLLP=pllp; //系统时钟的主PLL分频系数(PLL之后的分频),取值范围:2,4,6,8.(仅限这4个值!)
RCC_OscInitStructure.PLL.PLLQ=pllq; //USB/SDIO/随机数产生器等的主PLL分频系数(PLL之后的分频),取值范围:2~15.
ret=HAL_RCC_OscConfig(&RCC_OscInitStructure);//初始化
不知为何老通不过这儿  if(ret!=HAL_OK) while(1);？？？？

请高手指点下

只看该作者 · 2019-7-31 14:02

复制

void SystemClock_Config(void)

{

RCC_OscInitTypeDef RCC_OscInitStruct;

  RCC_ClkInitTypeDef RCC_ClkInitStruct;

__HAL_RCC_PWR_CLK_ENABLE();

__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;

  RCC_OscInitStruct.HSIState = RCC_HSI_ON;

  RCC_OscInitStruct.HSICalibrationValue = 16;

  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;

  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;

  RCC_OscInitStruct.PLL.PLLM = 8;

  RCC_OscInitStruct.PLL.PLLN = 168;

  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;

  RCC_OscInitStruct.PLL.PLLQ = 4;

  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)

  {

    _Error_Handler(__FILE__, __LINE__);

  }

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_DIV4;

  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;

if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)

  {

    _Error_Handler(__FILE__, __LINE__);

  }

HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);

HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);

HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);

}