board.c

/*
 * Copyright (c) 2006-2018, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2018-11-06     SummerGift   first version
 */

#include "board.h"

void SystemClock_Config(void)
{
	RCC_OscInitTypeDef RCC_OscInitStruct = {0};
	RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
	RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};

	/**Configure the main internal regulator output voltage 
	 */
	if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1_BOOST) != HAL_OK)
	{
		Error_Handler();
	}
	/**Initializes the CPU, AHB and APB busses clocks 
	 */
	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.PLLM = 2;
	RCC_OscInitStruct.PLL.PLLN = 30;
	RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
	RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
	RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
	if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
	{
		Error_Handler();
	}
	/**Initializes the CPU, AHB and APB busses clocks 
	 */
	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;

	if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
	{
		Error_Handler();
	}
	PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART3|RCC_PERIPHCLK_DSI|RCC_PERIPHCLK_LTDC;
	PeriphClkInit.Usart3ClockSelection = RCC_USART3CLKSOURCE_PCLK1;
	PeriphClkInit.DsiClockSelection = RCC_DSICLKSOURCE_DSIPHY;
	PeriphClkInit.LtdcClockSelection = RCC_LTDCCLKSOURCE_PLLSAI2_DIV2;
	PeriphClkInit.PLLSAI2.PLLSAI2Source = RCC_PLLSOURCE_HSE;
	PeriphClkInit.PLLSAI2.PLLSAI2M = 2;
	PeriphClkInit.PLLSAI2.PLLSAI2N = 8;
	PeriphClkInit.PLLSAI2.PLLSAI2P = RCC_PLLP_DIV2;
	PeriphClkInit.PLLSAI2.PLLSAI2R = RCC_PLLR_DIV2;
	PeriphClkInit.PLLSAI2.PLLSAI2Q = RCC_PLLQ_DIV2;
	PeriphClkInit.PLLSAI2.PLLSAI2ClockOut = RCC_PLLSAI2_LTDCCLK;
	if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
	{
		Error_Handler();
	}	
}