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第二十六天-待机唤醒实验

news 2025/9/3 0:04:53

一、待机唤醒概念

二、低功耗模式

三、待机模式

四、相关寄存器和库函数

1、寄存器

2、库函数

五、待机唤醒实验

1、实验要求

2、实验详细代码

1、wkup.c

#include "wkup.h"
#include "key.h"
#include "delay.h"void WKUP_Init()
{//使能GPIOA时钟RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO,ENABLE);GPIO_InitTypeDef GPIO_InitTypeDefStruct;GPIO_InitTypeDefStruct.GPIO_Mode = GPIO_Mode_IPD;GPIO_InitTypeDefStruct.GPIO_Pin = GPIO_Pin_0;GPIO_InitTypeDefStruct.GPIO_Speed = GPIO_Speed_50MHz;//初始化GPIOA0 下拉输入GPIO_Init(GPIOA,&GPIO_InitTypeDefStruct);//设置GPIOA0 外中断GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_Pin_0);//设置外中断EXTI_InitTypeDef EXTI_InitStruct;EXTI_InitStruct.EXTI_Line = EXTI_Line0;EXTI_InitStruct.EXTI_LineCmd = ENABLE;EXTI_InitStruct.EXTI_Mode = EXTI_Mode_Interrupt;EXTI_InitStruct.EXTI_Trigger = EXTI_Trigger_Rising;EXTI_Init(&EXTI_InitStruct);//设置外中断NVIC_InitTypeDef NVIC_InitStruct;NVIC_InitStruct.NVIC_IRQChannel = EXTI0_IRQn;NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 2;NVIC_InitStruct.NVIC_IRQChannelSubPriority = 2;NVIC_Init(&NVIC_InitStruct);//判断是否长按 A0 3sif(isKey() == 0)EnterSTAND();}
//判断是否连按3s
u8 isKey()
{u8 t = 0;while(1){if(IN3 == SET){t++;delay_ms(30);if(t == 100)return 1;}elsereturn 0;}
}void EnterSTAND()
{RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR,ENABLE);PWR_WakeUpPinCmd(ENABLE);PWR_EnterSTANDBYMode();
}void EXTI0_IRQHandler()
{EXTI_ClearITPendingBit(EXTI_Line0);if(isKey()){EnterSTAND();}
}

2、main.c

 int main(void){	delay_init();uart_init(115200);LED_Init();printf("已经解除\r\n");NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);WKUP_Init();RTC_Init();LCD_Init(); LCD_ShowString(60,50,200,24,24,"HELLO WORLD!");LCD_ShowString(60,120,200,24,24,"    -  -  ");LCD_ShowString(60,174,200,24,24,"  :  :  ");while(1){LED0 =! LED0;delay_ms(1000);}}