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 * 2020-09-09 forest-rain 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 /** Initializes the CPU, AHB and APB busses clocks 19 */ 20 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI; 21 RCC_OscInitStruct.HSIState = RCC_HSI_ON; 22 RCC_OscInitStruct.LSEState = RCC_LSE_OFF; 23 RCC_OscInitStruct.HSICalibrationValue = 70; 24 RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI; 25 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; 26 RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV2; 27 RCC_OscInitStruct.PLL.PLLN = 30; 28 RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV5; 29 RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV5; 30 RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV5; 31 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) 32 { 33 Error_Handler(); 34 } 35 36 /** Configure the SYSCLKSource, HCLK, PCLK1 and PCLK2 clocks dividers 37 */ 38 RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2 | RCC_CLOCKTYPE_HCLK3); 39 RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; 40 RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; 41 RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; 42 RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; 43 44 if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) 45 { 46 Error_Handler(); 47 } 48 } 49