1 /* 2 * Copyright (c) 2006-2018, RT-Thread Development Team 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 * 6 * Change Logs: 7 * Date Author Notes 8 * 2018-11-06 SummerGift first version 9 */ 10 11 #include "board.h" 12 SystemClock_Config(void)13void SystemClock_Config(void) 14 { 15 RCC_OscInitTypeDef RCC_OscInitStruct = {0}; 16 RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; 17 RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0}; 18 19 /**Configure the main internal regulator output voltage 20 */ 21 __HAL_RCC_PWR_CLK_ENABLE(); 22 __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1); 23 /**Initializes the CPU, AHB and APB busses clocks 24 */ 25 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; 26 RCC_OscInitStruct.HSEState = RCC_HSE_ON; 27 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; 28 RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; 29 RCC_OscInitStruct.PLL.PLLM = 25; 30 RCC_OscInitStruct.PLL.PLLN = 432; 31 RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; 32 RCC_OscInitStruct.PLL.PLLQ = 2; 33 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) 34 { 35 Error_Handler(); 36 } 37 /**Activate the Over-Drive mode 38 */ 39 if (HAL_PWREx_EnableOverDrive() != HAL_OK) 40 { 41 Error_Handler(); 42 } 43 /**Initializes the CPU, AHB and APB busses clocks 44 */ 45 RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK 46 |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2; 47 RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; 48 RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; 49 RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4; 50 RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2; 51 52 if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_7) != HAL_OK) 53 { 54 Error_Handler(); 55 } 56 PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_USART1; 57 PeriphClkInitStruct.Usart1ClockSelection = RCC_USART1CLKSOURCE_PCLK2; 58 if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK) 59 { 60 Error_Handler(); 61 } 62 } 63 64