1 /* 2 * Copyright (c) 2006-2021, 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 18 /** Configure the main internal regulator output voltage 19 */ 20 if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE0) != HAL_OK) 21 { 22 Error_Handler(); 23 } 24 /** Configure LSE Drive Capability 25 */ 26 HAL_PWR_EnableBkUpAccess(); 27 __HAL_RCC_LSEDRIVE_CONFIG(RCC_LSEDRIVE_LOW); 28 /** Initializes the RCC Oscillators according to the specified parameters 29 * in the RCC_OscInitTypeDef structure. 30 */ 31 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI48|RCC_OSCILLATORTYPE_LSE 32 |RCC_OSCILLATORTYPE_MSI; 33 RCC_OscInitStruct.LSEState = RCC_LSE_ON; 34 RCC_OscInitStruct.HSI48State = RCC_HSI48_ON; 35 RCC_OscInitStruct.MSIState = RCC_MSI_ON; 36 RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT; 37 RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6; 38 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; 39 RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI; 40 RCC_OscInitStruct.PLL.PLLM = 1; 41 RCC_OscInitStruct.PLL.PLLN = 55; 42 RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV7; 43 RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2; 44 RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2; 45 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) 46 { 47 Error_Handler(); 48 } 49 /** Initializes the CPU, AHB and APB buses clocks 50 */ 51 RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK 52 |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2; 53 RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; 54 RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; 55 RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; 56 RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; 57 58 if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK) 59 { 60 Error_Handler(); 61 } 62 } 63