197 lines
5.6 KiB
C
197 lines
5.6 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—待机模式
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******************************************************************************
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* @attention
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*
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* 实验平台:野火 STM32 H750 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_debug_usart.h"
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#include "./key/bsp_key.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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/* 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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DEBUG_USART_Config();
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/*初始化按键，不需要中断,仅初始化KEY2即可，只用于唤醒的PA0引脚不需要这样初始化*/
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Key_GPIO_Config();
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printf("\r\n 欢迎使用野火 STM32H750 开发板。\r\n");
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printf("\r\n 野火H750 待机模式例程\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，绿灯表示本次复位是上电或引脚复位，红灯表示即将进入待机状态，蓝灯表示本次是待机唤醒的复位\r\n");
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printf("\r\n 2.长按KEY2按键后，会进入待机模式\r\n");
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printf("\r\n 3.在待机模式下，按KEY1按键可唤醒，唤醒后系统会进行复位，程序从头开始执行\r\n");
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printf("\r\n 4.可通过检测WU标志位确定复位来源\r\n");
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printf("\r\n 5.在待机状态下，DAP下载器无法给STM32下载程序，需要唤醒后才能下载");
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//检测复位来源
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if(__HAL_PWR_GET_FLAG(PWR_FLAG_SB) == SET)
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{
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__HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB);
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LED_BLUE;
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printf("\r\n 待机唤醒复位 \r\n");
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}
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else
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{
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LED_GREEN;
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printf("\r\n 非待机唤醒复位 \r\n");
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}
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while(1)
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{
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// K2 按键长按进入待机模式
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if(KEY2_LongPress())
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{
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printf("\r\n 即将进入待机模式，进入待机模式后可按KEY1唤醒，唤醒后会进行复位，程序从头开始执行\r\n");
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LED_RED;
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HAL_Delay(1000);
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/*清除WU状态位*/
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__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);
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/* 使能WKUP引脚的唤醒功能 ，使能PA0*/
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HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN1_HIGH);
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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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/* 进入待机模式 */
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HAL_PWR_EnterSTANDBYMode();
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}
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}
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}
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/**
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* @brief 用于检测按键是否被长时间按下
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* @param 无
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* @retval 1 ：按键被长时间按下 0 ：按键没有被长时间按下
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*/
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static uint8_t KEY2_LongPress(void)
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{
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uint8_t downCnt =0; //记录按下的次数
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uint8_t upCnt =0; //记录松开的次数
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while(1) //死循环，由return结束
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{
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HAL_Delay(20); //延迟一段时间再检测
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if(HAL_GPIO_ReadPin( KEY2_GPIO_PORT, KEY2_PIN ) == SET) //检测到按下按键
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{
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downCnt++; //记录按下次数
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upCnt=0; //清除按键释放记录
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if(downCnt>=50) //按下时间足够
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{
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return 1; //检测到按键被时间长按下
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}
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}
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else
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{
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upCnt++; //记录释放次数
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if(upCnt>5) //连续检测到释放超过5次
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{
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return 0; //按下时间太短，不是按键长按操作
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}
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}// if(HAL_GPIO_ReadPin
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}//while
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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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/*********************************************END OF FILE**********************/
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