78 lines
1.8 KiB
C
78 lines
1.8 KiB
C
#include "bsp.h"
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#include "exti_io.h"
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void WakeUp_EXIT_Config( void )
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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NVIC_InitTypeDef NVIC_InitStructure;
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EXTI_InitTypeDef EXTI_InitStructure;
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//enable GPIOA Clock
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RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
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// config PA10 as input floating
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN; //very import
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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//enable syscfg clock
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
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// connect EXTI0 line to PA0 pin
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SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource0);
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//config EXTI10 Line
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EXTI_InitStructure.EXTI_Line = EXTI_Line0;
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EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
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EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
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EXTI_InitStructure.EXTI_LineCmd = ENABLE;
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EXTI_Init(&EXTI_InitStructure);
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// enable and set EXTI0 interrupu to the lowest priority
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NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x00;
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&NVIC_InitStructure);
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PWR_WakeUpPinCmd(PWR_WakeUpPin_1,ENABLE);
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}
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//检测WKUP脚的信号
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//返回值1:连续按下3s以上
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// 0:错误的触发
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u8 Check_WKUP(void)
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{
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u8 t=0; //记录按下的时间
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while(1)
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{
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if(WKUP_KD)
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{
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t++; //已经按下了
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delay_ms(30);
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if(t>=100) //按下超过3秒钟
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{
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return 1; //按下3s以上了
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}
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}else
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{
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return 0; //按下不足3秒
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}
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}
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}
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void EXTI0_IRQHandler( void )
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{
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EXTI_ClearITPendingBit(EXTI_Line10); //Clear the EXTI line 10 pending bit
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if(Check_WKUP()==0)//关机?
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{
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Wake_Up_Flag=0;
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PWR_EnterSTANDBYMode(); //进入待机（STANDBY）模式
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}else
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{
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Wake_Up_Flag=1;
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}
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}
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