51单片机 红外通信代码

#include "reg52.h"  

typedef unsigned char u8;
typedef unsigned int u16;

sbit  LSA=P2^2;
sbit  LSB=P2^3;
sbit  LSC=P2^4;

sbit IRIN=P3^2;

u8 IrValue[6];
u8 Time;

u8 DisplayData[8];
u8 code smgduan[17]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,
					0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x76 };
void delay (u16 i)
{
		while (i--);
}

void DigDisplay()
{			
		u8 i;
		for(i=0;i<3;i++)
		{
			switch(i)
			{
				case(0):
				LSA=0;LSB=0;LSC=0;
				case(1):
				LSA=1;LSB=0;LSC=0;
				case(2):
				LSA=0;LSB=1;LSC=0;			
			
			}

			P0=DisplayData[2-i];
			delay(100);
			P0=0x00;			
			}
}



void IrInit()
{
	IT0=1;	   		///下降沿触发
	EX0=0;		   ///打开中断允许
	EA=1;	   	///打开总中断
	IRIN=1;	   ///初始化端口
}




void main()
{
		IrInit();
		while(1)
		{
			DisplayData[0] = smgduan[IrValue[2]/16];
			DisplayData[1] = smgduan[IrValue[2]%16];
			DisplayData[2] = smgduan[16];
			DigDisplay();
		}
}

void ReadIr() interrupt 0
{
		u8 j,k;
		u16 err ;
		Time =0;
		delay(700);
		if(IRIN==0)
		{
			err=1000;
			while((IRIN==0) && (err>0))
			{
				delay(1);
				err--;
			}
			if(IRIN==1)
			{
			 	err =500;
				while((IRIN==1)&&(err>0)  )
				{
				   delay(1);
				   err--;					   
			  	}
				for (k=0;k<4;k++)				//四组数据
				{								
					for(j=0;j<8;j++)			//接受数据1次
					{
						
						err=60;
						while((IRIN==0)&&(err>0))
						{
							delay(1);
							err--;						
						}
						err=500;
						while((IRIN==1)&&(err>0))
						{
							delay(10);
							Time++;
							err--;
							if(Time>30)
							{
								return;
							}
							
						}
							IrValue[k]>>=1;
							if(Time>=8)
							{						
								IrValue[k]|= 0x80;
							}
							Time=0;									
					}			
				}	
			}
			if(IrValue[2]!=~IrValue[3])
			{
					return;
			}

		}
}