69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
#include "McuBspSys.h"
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int McuBspSysInit(void)
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{
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/* 底层库初始化 */
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HAL_Init();
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/* 系统时钟初始化 */
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McuBspSysClockInit();
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__HAL_RCC_PWR_CLK_ENABLE(); // 使能电压时钟（在进入低功耗时，如果使能电源时钟，可以降低10us左右的功耗）
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/* 特殊GPIO始终初始化(使用SWD调试，并开放JTAG的引脚) */
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__HAL_RCC_AFIO_CLK_ENABLE();
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__HAL_AFIO_REMAP_SWJ_NOJTAG();
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__HAL_AFIO_REMAP_PD01_ENABLE();
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__HAL_AFIO_REMAP_USART3_ENABLE();
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return 0;
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}
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void McuBspSysClockInit(void)
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{
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RCC_ClkInitTypeDef clkinitstruct = {0};
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RCC_OscInitTypeDef oscinitstruct = {0};
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/* Configure PLL ------------------------------------------------------*/
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/* PLL configuration: PLLCLK = (HSE / 1) * PLLMUL = 8 * 9 = 72 MHz */
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/* PREDIV1 configuration: PREDIV1CLK = PLLCLK / HSEPredivValue = 72 / 1 = 72 MHz */
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/* Enable HSI and activate PLL with HSi_DIV2 as source */
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oscinitstruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
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oscinitstruct.HSEState = RCC_HSE_ON;
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oscinitstruct.LSEState = RCC_LSE_OFF;
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oscinitstruct.HSIState = RCC_HSI_OFF;
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oscinitstruct.LSIState = RCC_LSI_OFF;
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oscinitstruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
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oscinitstruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
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oscinitstruct.PLL.PLLState = RCC_PLL_ON;
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oscinitstruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
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oscinitstruct.PLL.PLLMUL = RCC_PLL_MUL9;
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if (HAL_RCC_OscConfig(&oscinitstruct)!= HAL_OK)
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{
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/* Initialization Error */
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while(1);
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}
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/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
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clocks dividers */
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clkinitstruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
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clkinitstruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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clkinitstruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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clkinitstruct.APB2CLKDivider = RCC_HCLK_DIV1;
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clkinitstruct.APB1CLKDivider = RCC_HCLK_DIV2;
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if (HAL_RCC_ClockConfig(&clkinitstruct, FLASH_LATENCY_2)!= HAL_OK)
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{
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/* Initialization Error */
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while(1);
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}
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}
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/* 底层硬件初始化 */
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void HAL_MspInit(void)
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{
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}
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/* 底层硬件反初始化 */
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void HAL_MspDeInit(void)
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{
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}
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