/**
* @brief This function configures the Flash prefetch, Flash preread and Buffer cache,
* Configures time base source, NVIC and Low level hardware
* @note This function is called at the beginning of program after reset and before
* the clock configuration
* @note The time base configuration is based on MSI clock when exiting from Reset.
* Once done, time base tick start incrementing.
* In the default implementation,Systick is used as source of time base.
* the tick variable is incremented each 1ms in its ISR.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_Init(void)
{
/* Configure Buffer cache, Flash prefetch, Flash preread */
#if (BUFFER_CACHE_DISABLE != 0)
__HAL_FLASH_BUFFER_CACHE_DISABLE();
#endif /* BUFFER_CACHE_DISABLE */
#if (PREREAD_ENABLE != 0)
__HAL_FLASH_PREREAD_BUFFER_ENABLE();
#endif /* PREREAD_ENABLE */
#if (PREFETCH_ENABLE != 0)
__HAL_FLASH_PREFETCH_BUFFER_ENABLE();
#endif /* PREFETCH_ENABLE */
/* Use systick as time base source and configure 1ms tick (default clock after Reset is MSI) */
HAL_InitTick(TICK_INT_PRIORITY);
/* Init the low level hardware */
HAL_MspInit();
/* Return function status */
return HAL_OK;
}
void clock_init(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_ClkInitTypeDef RCC_ClkInitStruct;
__HAL_FLASH_PREREAD_BUFFER_ENABLE();
__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.HSEState = RCC_HSE_OFF;
RCC_OscInitStruct.MSIState = RCC_MSI_OFF;
RCC_OscInitStruct.LSIState = RCC_LSI_OFF;
RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
RCC_OscInitStruct.HSI48State = RCC_HSI48_OFF;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLLMUL_4;
RCC_OscInitStruct.PLL.PLLDIV = RCC_PLLDIV_2;
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;
HAL_RCC_OscConfig(&RCC_OscInitStruct);
HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1);
HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
HAL_NVIC_SetPriority(SysTick_IRQn, 1, 0);
}
