STM32睡眠和停止唤醒源代码 -

#include "wkup.h"
#include "led.h"
#include "delay.h"
void Sys_Sleepy(void)
{
SCB->SCR |=0X00;
#if defined ( __CC_ARM )
__force_stores();
#endif
/* Request Wait For Interrupt */
__WFI();
}
//系统进入待机模式
void Sys_Enter_Sys_Sleepy(void)
{
// RCC_APB2PeriphResetCmd(0X01FC,DISABLE); //复位所有IO口
Sys_Sleepy();
}
void EXTI2_IRQHandler(void)
{
EXTI_ClearITPendingBit(EXTI_Line2); // 清除LINE10上的中断标志位
SCB->SCR |=SCB_SCR_SEVONPEND;
// Sys_Enter_Sys_Sleepy();
if(E2==0)//关机?
{
delay_ms(10000);
if(E2==0)
{
LED0=0;
Sys_Enter_Sys_Sleepy();
}
} else LED1=0;
}
void EXTI3_IRQHandler(void)
{
EXTI_ClearITPendingBit(EXTI_Line3); // 清除LINE10上的中断标志位
SCB->SCR |=SCB_SCR_SEVONPEND;
LED1=!LED1;
/* if(E3!=0)//关机?
{
Sys_Enter_Sys_Sleepy();
} else LED0=1; */
}
//PA0 WKUP唤醒初始化
void WKUP_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE | RCC_APB2Periph_AFIO, ENABLE);//使能GPIOA和复用功能时钟
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_2; //PE.2
GPIO_InitStructure.GPIO_Mode =GPIO_Mode_IPU;//上拉输入
GPIO_Init(GPIOE, &GPIO_InitStructure); //初始化IO
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_3; //PE.3
GPIO_InitStructure.GPIO_Mode =GPIO_Mode_IPU;//上拉输入
GPIO_Init(GPIOE, &GPIO_InitStructure); //初始化IO
//使用外部中断方式
GPIO_EXTILineConfig(GPIO_PortSourceGPIOE, GPIO_PinSource2); //中断线2连接GPIOE.2
GPIO_EXTILineConfig(GPIO_PortSourceGPIOE, GPIO_PinSource3);
EXTI_InitStructure.EXTI_Line = EXTI_Line3|EXTI_Line2; //设置按键所有的外部线路
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; //设外外部中断模式:EXTI线路为中断请求
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; //上升沿触发
EXTI_InitStructure.EXTI_LineCmd =ENABLE;// DISABLE;
EXTI_Init(&EXTI_InitStructure); // 初始化外部中断
NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn; //使能按键所在的外部中断通道
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority =0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority =0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能外部中断通道
NVIC_Init(&NVIC_InitStructure); //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器
/*----------------------------------------*/
NVIC_InitStructure.NVIC_IRQChannel = EXTI2_IRQn; //使能按键所在的外部中断通道
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能外部中断通道
NVIC_Init(&NVIC_InitStructure); //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器
if(E2!=0) Sys_Sleepy(); //不是开机,进入待机模式
}

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