chuanglian.c

红外收发代码,用于遥控窗帘 开发平台 ：KEIL

#include <AT89x051.H>

#define led1 P3_0
#define led2 P3_1
#define led3 P1_6
#define led4 P1_5

unsigned char  k;
unsigned char data psCount; //定时器计数器
unsigned char data i;       
unsigned char data j;
unsigned char data temp;
unsigned char data dp[4];  //用来保存红外遥控的码值

main()
{
led1=0;
led2=0;
led3=0;
led4=1;
k=0;
dp[0]=0;
dp[1]=0;
dp[2]=0;
dp[3]=0;
TMOD=0X11;
TH0 = 254;       //定时500uS
TL0 = 12;
TCON=0X05;
PX1=0;
PT0=1;
IE=0X80;
TR0=1;
EX1=1;
 while(1)
 {
 	if(dp[2]==0Xf3)
   	{
	    dp[2]=0;
		led1=1;
	    led2=1;
   		
    }
	if(dp[2]==0Xff)
   	{
	    dp[2]=0;
   		led1=1;
	    led2=0;
    }
	if(dp[2]==0Xfb)
   	{
	dp[2]=0;
   	led1=0;
    	led2=1;
    }
    if(dp[2]==0xf7)
   	{
   		dp[2]=0;
   		k=k+1;
	
   		if(k==3)
   			{
   				 k=1;
   			}
   		//led1=1;
	    //led2=0;
	    
    }
	if(k==1)
	{led3=1;
	led4=0;
	}
	if(k==2)
	{ 
	led3=0;
	led4=1;
	}
    if(k==1)
  	{
   		if(P1_4==1)
   		{
   			led1=1;
	        led2=0;
	    }
	    if(P1_4==0)
	    {
	      	led1=0;
	        led2=1;
	    }
	 }
 }
}


void timer0() interrupt 1
{
 
 
 psCount++; 

 TH0 = 254;//(65536-500)/256;        //定时500uS
 TL0 = 12;//(65536-500)%256;
 
}
void  INT1_ISR() interrupt 2 using 2   
{
	ET0=0;    
psCount=0;
//while(P3_2==1);//判断是否有键被按下  
ET0=1;
while(P3_3 == 0);     
     if( psCount > 17)//0.5* 17 = 8.5ms约为9.0ms
  {
   ET0 = 0;
   psCount = 0;
   ET0 = 1;
   while(P3_3 == 1);
      if(psCount > 5)//超过0.5*5 = 2.5毫秒，是起始位，小于2.5MS是停止位，检查一下遥控命令是不是连发，不是则执行下面的程序
      {
    ET0 = 0;
       psCount = 0;
       dp[0] = 0x0;
     dp[1] = 0x0;
     dp[2] = 0x0;
     dp[3] = 0x0;
      //数据
    for(i = 0 ; i < 4; i++)
    {
     for(j = 0; j < 8; j++)
     {
      while(P3_3 == 0);
            ET0 = 0;
               psCount = 0;
               ET0 = 1;
      while(P3_3 == 1);
      if(psCount > 2)//根据波形长度判定码值为0或1
       temp = 0;
      else
          temp = 1;
      dp[i] |= (temp<<j);//保存键值
      }
     
     }
               
   }
  
   }
   
//   if(dp[2]==0Xf3)
//   	{
//   		led1=0;
//    	led2=1;
//    }
//	if(dp[2]==0Xff)
//   	{
//   		led1=1;
//	led2=1;
//    }
//	if(dp[2]==0Xfb)
//   	{
//   		led1=1;
//	led2=0;
//    }
//    if(dp[2]==0Xf7)
//   	{
//   		k=k+1;
//   		if(k==3)
//   			{
//   				 k=1;
//   			}
//   		//led1=1;
//	    //led2=0;
//	    
//    }
}