232 lines
7.6 KiB
C
232 lines
7.6 KiB
C
/**
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******************************************************************************
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* @file main.c
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* @author fire
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* @version V1.0
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* @date 2019-xx-xx
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* @brief 野火H750 PWR—停止模式
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******************************************************************************
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* @attention
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*
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* 实验平台:野火 STM32 H743 开发板
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* 论坛 :http://www.firebbs.cn
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* 淘宝 :http://firestm32.taobao.com
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*
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******************************************************************************
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*/
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#include "main.h"
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#include "stm32h7xx.h"
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#include "./led/bsp_led.h"
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#include "./usart/bsp_usart.h"
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#include "./key/bsp_exti.h"
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#include "./delay/core_delay.h"
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/**
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* @brief 主函数
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* @param 无
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* @retval 无
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*/
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int main(void)
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{
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uint32_t SYSCLK_Frequency=0;
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uint32_t HCLK_Frequency=0;
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uint32_t PCLK1_Frequency=0;
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uint32_t PCLK2_Frequency=0;
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uint32_t SYSCLK_Source=0;
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/* 初始化系统时钟为480MHz */
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SystemClock_Config();
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/* 初始化LED */
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LED_GPIO_Config();
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/* 初始化调试串口，一般为串口1 */
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UARTx_Config();
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/* 初始化按键为中断模式，按下中断后会进入中断服务函数 */
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EXTI_Key_Config();
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printf("\r\n 欢迎使用野火 STM32H743 开发板。\r\n");
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printf("\r\n 野火H743 停止模式例程\r\n");
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printf("\r\n 实验说明：\r\n");
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printf("\r\n 1.本程序中，绿灯表示STM32正常运行，红灯表示睡眠状态，蓝灯表示刚从停止状态被唤醒\r\n");
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printf("\r\n 2.程序运行一段时间后自动进入停止状态，在停止状态下，可使用KEY1或KEY2唤醒\r\n");
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printf("\r\n 3.本实验执行这样一个循环：\r\n ------》亮绿灯(正常运行)->亮红灯(停止模式)->按KEY1或KEY2唤醒->亮蓝灯(刚被唤醒)-----》\r\n");
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printf("\r\n 4.在停止状态下，DAP下载器无法给STM32下载程序，\r\n 可按KEY1、KEY2唤醒后下载，\r\n 或按复位键使芯片处于复位状态，然后在电脑上点击下载按钮，再释放复位按键，即可下载\r\n");
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while(1)
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{
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/*********执行任务***************************/
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printf("\r\n STM32正常运行，亮绿灯\r\n");
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LED_GREEN;
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HAL_Delay(2000);
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/*****任务执行完毕，进入睡眠降低功耗***********/
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printf("\r\n 进入停止模式，亮红灯,按KEY1或KEY2按键可唤醒\r\n");
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//使用红灯指示，进入睡眠状态
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LED_RED;
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//暂停滴答时钟，防止通过滴答时钟中断唤醒
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HAL_SuspendTick();
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/*设置停止模式时，FLASH进入掉电状态*/
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HAL_PWREx_EnableFlashPowerDown();
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/* 进入停止模式，设置电压调节器为低功耗模式，等待中断唤醒 */
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HAL_PWR_EnterSTOPMode(PWR_MAINREGULATOR_ON,PWR_STOPENTRY_WFI);
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//等待中断唤醒 K1或K2按键中断
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/***被唤醒，亮蓝灯指示***/
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LED_BLUE;
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//根据时钟寄存器的值更新SystemCoreClock变量
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SystemCoreClockUpdate();
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//获取唤醒后的时钟状态
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SYSCLK_Frequency = HAL_RCC_GetSysClockFreq();
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HCLK_Frequency = HAL_RCC_GetHCLKFreq();
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PCLK1_Frequency = HAL_RCC_GetPCLK1Freq();
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PCLK2_Frequency = HAL_RCC_GetPCLK2Freq();
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SYSCLK_Source = __HAL_RCC_GET_SYSCLK_SOURCE();
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//由于系统直接使用HSI时钟，影响串口波特率，需要重新初始化串口
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UARTx_HSI_Config();
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printf("\r\n刚唤醒的时钟状态：\r\n");
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printf(" SYSCLK频率:%d,\r\n HCLK频率:%d,\r\n PCLK1频率:%d,\r\n PCLK2频率:%d,\r\n 时钟源:%d (0表示HSI，8表示PLLCLK)\n",
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SYSCLK_Frequency,HCLK_Frequency,PCLK1_Frequency,PCLK2_Frequency,SYSCLK_Source);
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/* 从停止模式唤醒后配置系统时钟:启用HSE、PLL*/
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/* 选择PLL作为系统时钟源(HSE和PLL在停止模式下被禁用)*/
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SYSCLKConfig_STOP();
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//被唤醒后，恢复滴答时钟
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HAL_ResumeTick();
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//获取重新配置后的时钟状态
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SYSCLK_Frequency = HAL_RCC_GetSysClockFreq();
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HCLK_Frequency = HAL_RCC_GetHCLKFreq();
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PCLK1_Frequency = HAL_RCC_GetPCLK1Freq();
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PCLK2_Frequency = HAL_RCC_GetPCLK2Freq();
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SYSCLK_Source = __HAL_RCC_GET_SYSCLK_SOURCE();
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//重新配置时钟源后始终状态
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printf("\r\n重新配置后的时钟状态：\r\n");
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printf(" SYSCLK频率:%d,\r\n HCLK频率:%d,\r\n PCLK1频率:%d,\r\n PCLK2频率:%d,\r\n 时钟源:%d (0表示HSI，8表示PLLCLK)\n",
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SYSCLK_Frequency,HCLK_Frequency,PCLK1_Frequency,PCLK2_Frequency,SYSCLK_Source);
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HAL_Delay(2000);
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printf("\r\n 已退出停止模式\r\n");
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//继续执行while循环
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}
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}
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/**
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* @brief System Clock 配置
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* system Clock 配置如下:
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* System Clock source = PLL (HSE)
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* SYSCLK(Hz) = 480000000 (CPU Clock)
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* HCLK(Hz) = 240000000 (AXI and AHBs Clock)
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* AHB Prescaler = 2
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* D1 APB3 Prescaler = 2 (APB3 Clock 120MHz)
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* D2 APB1 Prescaler = 2 (APB1 Clock 120MHz)
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* D2 APB2 Prescaler = 2 (APB2 Clock 120MHz)
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* D3 APB4 Prescaler = 2 (APB4 Clock 120MHz)
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* HSE Frequency(Hz) = 25000000
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* PLL_M = 5
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* PLL_N = 192
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* PLL_P = 2
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* PLL_Q = 2
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* PLL_R = 2
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* VDD(V) = 3.3
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* Flash Latency(WS) = 4
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* @param None
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* @retval None
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*/
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/**
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* @brief System Clock Configuration
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* @retval None
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*/
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void SystemClock_Config(void)
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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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/** 启用电源配置更新
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*/
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HAL_PWREx_ConfigSupply(PWR_LDO_SUPPLY);
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/** 配置主内稳压器输出电压
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*/
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__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE0);
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while(!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {}
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/** 初始化CPU、AHB和、APB总线时钟
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*/
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
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RCC_OscInitStruct.HSEState = RCC_HSE_ON;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
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RCC_OscInitStruct.PLL.PLLM = 5;
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RCC_OscInitStruct.PLL.PLLN = 192;
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RCC_OscInitStruct.PLL.PLLP = 2;
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RCC_OscInitStruct.PLL.PLLQ = 2;
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RCC_OscInitStruct.PLL.PLLR = 2;
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RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_2;
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RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE;
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RCC_OscInitStruct.PLL.PLLFRACN = 0;
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if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
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{
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}
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/** 初始化CPU、AHB和、APB总线时钟
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*/
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RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
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|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2
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|RCC_CLOCKTYPE_D3PCLK1|RCC_CLOCKTYPE_D1PCLK1;
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV2;
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RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV2;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV2;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV2;
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RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV2;
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if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)
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{
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}
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}
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/**
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* @brief 从停止模式唤醒后配置系统时钟:启用HSE、PLL并选择PLL作为系统时钟源。
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* @param 无
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* @retval 无
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*/
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static void SYSCLKConfig_STOP(void)
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{
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RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
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RCC_OscInitTypeDef RCC_OscInitStruct = {0};
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uint32_t pFLatency = 0;
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/* 配置主内稳压器输出电压 */
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__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE0);
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while(!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {}
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/* 根据内部RCC寄存器获取振荡器配置 */
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HAL_RCC_GetOscConfig(&RCC_OscInitStruct);
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/* 从停止模式唤醒后重新配置系统时钟: 启用HSE和PLL */
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
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RCC_OscInitStruct.HSEState = RCC_HSE_ON;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
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{
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while(1) { ; }
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}
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/* 根据内部RCC寄存器获取时钟配置 */
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HAL_RCC_GetClockConfig(&RCC_ClkInitStruct, &pFLatency);
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/* 选择 PLL 作为系统时钟源, 并配置 HCLK、PCLK1 和 PCLK2时钟分频系数 */
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RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK;
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, pFLatency) != HAL_OK)
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{
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while(1) { ; }
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}
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}
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/*********************************************END OF FILE**********************/
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