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https://github.com/armink/FlashDB.git
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76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
/*
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* Copyright (c) 2006-2019, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2019-10-26 ChenYong first version
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* 2020-01-08 xiangxistu add HSI configuration
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* 2020-04-20 chenyaxing add system_clock_config frequency parameter
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*/
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#include <stm32f4xx.h>
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#include <stdio.h>
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void _error_handler(char *s, int num);
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#ifndef Error_Handler
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#define Error_Handler() _error_handler(__FILE__, __LINE__)
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#endif
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void system_clock_config(int target_freq_mhz)
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{
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RCC_OscInitTypeDef RCC_OscInitStruct = { 0 };
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RCC_ClkInitTypeDef RCC_ClkInitStruct = { 0 };
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/** Configure the main internal regulator output voltage
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*/
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__HAL_RCC_PWR_CLK_ENABLE()
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;
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__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
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/** Initializes the CPU, AHB and APB busses clocks
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*/
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
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RCC_OscInitStruct.HSIState = RCC_HSI_ON;
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RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
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RCC_OscInitStruct.PLL.PLLM = 8;
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RCC_OscInitStruct.PLL.PLLN = target_freq_mhz;
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RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
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RCC_OscInitStruct.PLL.PLLQ = 4;
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if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
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{
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Error_Handler();
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}
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/** Initializes the CPU, AHB and APB busses clocks
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*/
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RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
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if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
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{
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Error_Handler();
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}
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}
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int clock_information(void)
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{
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printf("System Clock information\n");
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printf("SYSCLK_Frequency = %d\n", (int) HAL_RCC_GetSysClockFreq());
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printf("HCLK_Frequency = %d\n", (int) HAL_RCC_GetHCLKFreq());
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printf("PCLK1_Frequency = %d\n", (int) HAL_RCC_GetPCLK1Freq());
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printf("PCLK2_Frequency = %d\n", (int) HAL_RCC_GetPCLK2Freq());
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return 0;
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}
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void wait_ms(unsigned long ms_time)
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{
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HAL_Delay(ms_time);
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}
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