#include "wkup.h"
#include "delay.h"
//////////////////////////////////////////////////////////////////////////////////	 
//±¾³ÌÐòÖ»¹©Ñ§Ï°Ê¹Óã¬Î´¾­×÷ÕßÐí¿É£¬²»µÃÓÃÓÚÆäËüÈκÎÓÃ;
//ALIENTEKÕ½½¢STM32¿ª·¢°å
//´ý»ú»½ÐÑ ´úÂë	   
//ÕýµãÔ­×Ó@ALIENTEK
//¼¼ÊõÂÛ̳:www.openedv.com
//ÐÞ¸ÄÈÕÆÚ:2012/9/7
//°æ±¾£ºV1.0
//°æȨËùÓУ¬µÁ°æ±Ø¾¿¡£
//Copyright(C) ¹ãÖÝÊÐÐÇÒíµç×ӿƼ¼ÓÐÏÞ¹«Ë¾ 2009-2019
//All rights reserved									  
//////////////////////////////////////////////////////////////////////////////////
	 
void Sys_Standby(void)
{  
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);	//ʹÄÜPWRÍâÉèʱÖÓ
	PWR_WakeUpPinCmd(ENABLE);  //ʹÄÜ»½ÐѹܽŹ¦ÄÜ
	PWR_EnterSTANDBYMode();	  //½øÈë´ýÃü£¨STANDBY£©Ä£Ê½ 		 
}
//ϵͳ½øÈë´ý»úģʽ
void Sys_Enter_Standby(void)
{			 
	RCC_APB2PeriphResetCmd(0X01FC,DISABLE);	//¸´Î»ËùÓÐIO¿Ú
	Sys_Standby();
}
// //¼ì²âWKUP½ÅµÄÐźÅ
// //·µ»ØÖµ1:PA0Ϊ¸ßµçƽ
// //      0:PA0ΪµÍµçƽ
u8 Check_WKUP(void) 
{

	if(WKUP_KD == 0)
	{
   delay_ms(250);
		if(WKUP_KD == 0)
		{
     return 0;
    }
  }
	
	if(WKUP_KD == 1)
	{
   delay_ms(250);
		if(WKUP_KD == 1)
		{
     return 1;
    }
  }
}

//ÖжÏ,¼ì²âµ½PA0½ÅµÄÒ»¸öÉÏÉýÑØ.	  
//ÖжÏÏß0ÏßÉϵÄÖжϼì²â


void EXTI0_IRQHandler(void)
{ 		    		    				     		    
	EXTI_ClearITPendingBit(EXTI_Line0); // Çå³ýLINE10ÉϵÄÖжϱê־λ		  
	if(Check_WKUP())//¹Ø»ú?
	{		  
		Sys_Enter_Standby();  
	}
} 
//PA0 WKUP»½Ðѳõʼ»¯
void WKUP_Init(void)
{	
    GPIO_InitTypeDef  GPIO_InitStructure;  		  
	NVIC_InitTypeDef NVIC_InitStructure;
	EXTI_InitTypeDef EXTI_InitStructure;

	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);//ʹÄÜGPIOAºÍ¸´Óù¦ÄÜʱÖÓ

	GPIO_InitStructure.GPIO_Pin =GPIO_Pin_0;	 //PA.0
	GPIO_InitStructure.GPIO_Mode =GPIO_Mode_IPD;//ÉÏÀ­ÊäÈë
	GPIO_Init(GPIOA, &GPIO_InitStructure);	//³õʼ»¯IO
    //ʹÓÃÍⲿÖжϷ½Ê½
	GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource0);	//ÖжÏÏß0Á¬½ÓGPIOA.0

    EXTI_InitStructure.EXTI_Line = EXTI_Line0;	//ÉèÖð´¼üËùÓеÄÍⲿÏß·
	EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;			//ÉèÍâÍⲿÖжÏģʽ:EXTIÏß·ΪÖжÏÇëÇó
	EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;  //ÉÏÉýÑØ´¥·¢
   	EXTI_InitStructure.EXTI_LineCmd = ENABLE;
	EXTI_Init(&EXTI_InitStructure);	// ³õʼ»¯ÍⲿÖжÏ

	NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn; //ʹÄÜ°´¼üËùÔÚµÄÍⲿÖжÏͨµÀ
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2; //ÏÈÕ¼ÓÅÏȼ¶2¼¶
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; //´ÓÓÅÏȼ¶2¼¶
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //ʹÄÜÍⲿÖжÏͨµÀ
	NVIC_Init(&NVIC_InitStructure); //¸ù¾ÝNVIC_InitStructÖÐÖ¸¶¨µÄ²ÎÊý³õʼ»¯ÍâÉèNVIC¼Ä´æÆ÷

	if(Check_WKUP()==0) Sys_Standby();    //²»ÊÇ¿ª»ú,½øÈë´ý»úģʽ  
}
///////////////////////////////////////////
//RTC¶¨Ê±»½ÐÑ
 void EXTI_Configuration(void)
{
	EXTI_InitTypeDef EXTI_InitStructure;
	
	/* Configure EXTI Line17(RTC Alarm) to generate an interrupt on rising edge */
	EXTI_ClearITPendingBit(EXTI_Line17);
	EXTI_InitStructure.EXTI_Line = EXTI_Line17;
	EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
	EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
	EXTI_InitStructure.EXTI_LineCmd = ENABLE;
	EXTI_Init(&EXTI_InitStructure);
   
}

void RTCAlarm_IRQHandler(void)
{ 		    		    				     		    
	EXTI->PR=1<<17;  //Çå³ýLINE17ÉϵÄÖжϱê־λ	
   SystemInit();	
} 

void RTC_Configuration(void)
{
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
	PWR_BackupAccessCmd(ENABLE);
  if(PWR_GetFlagStatus(PWR_FLAG_SB) != RESET)
  {
    PWR_ClearFlag(PWR_FLAG_SB);
    RTC_WaitForSynchro();
  }
  else
  {
    BKP_DeInit();
    RCC_LSEConfig(RCC_LSE_ON);
//	RCC_LSICmd(ENABLE);
    while(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
    {
    }
	/* Ñ¡Ôñ LSE Ϊ RTC ʱÖÓÔ´ */
	RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);

 //   RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);
    RCC_RTCCLKCmd(ENABLE);
    RTC_WaitForSynchro();
//    RTC_SetPrescaler(39999); 
    RTC_SetPrescaler(32767);  
 
    RTC_WaitForLastTask();
  }
  RTC_ITConfig(RTC_IT_ALR, ENABLE);
  RTC_WaitForLastTask();
	RTC_SetAlarm(RTC_GetCounter()+ 5);
	RTC_WaitForLastTask();
}

// void NVIC_Configuration(void)
// {
//   NVIC_InitTypeDef NVIC_InitStructure;
//   NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

//   NVIC_InitStructure.NVIC_IRQChannel = RTCAlarm_IRQn;
//   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
//   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
//   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
//   NVIC_Init(&NVIC_InitStructure);

// }