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 * 2018-12-21 zylx first version 9 */ 10 11 #include <board.h> 12 #include <drv_common.h> 13 SystemClock_Config(void)14void SystemClock_Config(void) 15 { 16 RCC_OscInitTypeDef RCC_OscInitStruct = {0}; 17 RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; 18 RCC_PeriphCLKInitTypeDef PeriphClkInit = {0}; 19 20 /**Configure LSE Drive Capability 21 */ 22 HAL_PWR_EnableBkUpAccess(); 23 __HAL_RCC_LSEDRIVE_CONFIG(RCC_LSEDRIVE_HIGH); 24 /**Initializes the CPU, AHB and APB busses clocks 25 */ 26 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_HSI14 27 |RCC_OSCILLATORTYPE_LSI|RCC_OSCILLATORTYPE_LSE; 28 RCC_OscInitStruct.LSEState = RCC_LSE_ON; 29 RCC_OscInitStruct.HSIState = RCC_HSI_ON; 30 RCC_OscInitStruct.HSI14State = RCC_HSI14_ON; 31 RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT; 32 RCC_OscInitStruct.HSI14CalibrationValue = 16; 33 RCC_OscInitStruct.LSIState = RCC_LSI_ON; 34 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; 35 RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI; 36 RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL6; 37 RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV1; 38 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) 39 { 40 Error_Handler(); 41 } 42 /**Initializes the CPU, AHB and APB busses clocks 43 */ 44 RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK 45 |RCC_CLOCKTYPE_PCLK1; 46 RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; 47 RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; 48 RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; 49 50 if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK) 51 { 52 Error_Handler(); 53 } 54 PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART1|RCC_PERIPHCLK_USART2 55 |RCC_PERIPHCLK_RTC; 56 PeriphClkInit.Usart1ClockSelection = RCC_USART1CLKSOURCE_PCLK1; 57 PeriphClkInit.Usart2ClockSelection = RCC_USART2CLKSOURCE_PCLK1; 58 PeriphClkInit.RTCClockSelection = RCC_RTCCLKSOURCE_LSE; 59 if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK) 60 { 61 Error_Handler(); 62 } 63 } 64