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# 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; //i???????8?????
for (i=0;i<3;i++)
{
switch (i)
{
case (0): //???i????0???????????
LSA=0;LSB=0;LSC=0;break; //break????????case (0)?????switch
case (1):
LSA=1;LSB=0;LSC=0;break;
case (2):
LSA=0;LSB=1;LSC=0;break;
}
P0=DisplayData[ i]; //????????
delay(100); //????????????
P0=0x00; //??????????????
}
}
void IrInit() //?????
{
IT0=1;//????????
EX0=1; //???ж?0????
EA=1; //?????ж?
IRIN=1; //????????
}
void main ()
{
IrInit();
while (1)
{
DisplayData[0]=smgduan[IrValue[2]/16]; //??λ
DisplayData[1]=smgduan[IrValue[2]%16]; //??λ
DisplayData[2]=smgduan[16];
DigDisplay();
}
}
void ReadIr() interrupt()
{
u8 j,k;
u16 err;
Time=0;
delay(700);//7ms
if(IRIN==0) //???????????????????????????????????9ms????
{
err=1000; //1000*10us=10ms,????????????????????
while ((IRIN==0)&&(err>0)) //??????9ms???????? //??????????????????????????????????????????????ó???????????????
{
delay(1); //10us?????????1000???
err--;
}
if(IRIN==1) //?????????9ms????
{
err=500; //5ms
while((IRIN==1)&&(err>0)) //???4.5ms????????????
{
delay(1);
err--;
}
for(k=0;k<4;k++) //????4??????
{
for(j=0;j<8;j++) //???????????
{
err=60;
while((IRIN==0)&&(err>0)) //??????????560us???
{
delay(1);
err--;
}
err=500;
while((IRIN==1)&&(err>0)) //????????????
{
delay(10); //0.1ms
Time++;
err--;
if (Time>30) //3ms???????3ms???????????????
{
return;
}
}
IrValue[k]>>=1; //k???????????
if (Time>=8) //??????????????565us???????λ1
{
IrValue[k]|=0x80;
}
Time=0;//??????????????
}
}
}
if (IrValue[2]!=~IrValue[3]) //??????????????????
{
return; //??????????????????????
}
}
}
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