基于51紅外線遙控解碼人流量統計系統設計基底

#include

#define uchar unsigned char

#define uint unsigned int

unsigned char code smg_du[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x00};

unsigned char code smg_we[]={0x08,0x18,0x28,0x38,0x48,0x58,0x68,0x78};

uchar irtime;

uchar startflag;

uchar irdata[33];

uchar bitnum;

uchar irreceok;

uchar ircode[4];

uchar irprosok;

uchar disp[8];

//************************************************

//延時函數，在12MHz的晶振頻率下

//大約50us的延時

//************************************************

void delay_50us(uint t)

{

uchar j;

for(;t>0;t--)

for(j=19;j>0;j--);

}

//************************************************

//延時函數，在12MHz的晶振頻率下

//大約50ms的延時

//************************************************

void delay_50ms(uint t)

{

uint j;

for(;t>0;t--)

for(j=6245;j>0;j--);

}

void timer0init(void)

{

TMOD=0x02;

TH0=0x00;

TL0=0x00;

ET0=1;

EA=1;

TR0=1;

}

void int0init(void)

{

IT0=1;

EX0=1;

EA=1;

}

void irwork(void)

{

disp[0]=ircode[0]/16;

disp[1]=ircode[0]%16;

disp[2]=ircode[1]/16;

disp[3]=ircode[1]%16;

disp[4]=ircode[2]/16;

disp[5]=ircode[2]%16;

disp[6]=ircode[3]/16;

disp[7]=ircode[3]%16;

}

void display(void)

{

uchar i;

for(i=0;i<8;i++)

{

P1=smg_du[disp[i]];

P2=smg_we[i];

delay_50us(20);

}

}

void irpros(void)

{

uchar k,i,j;

uchar value;

k=1;

for(j=0;j<4;j++)

{

for(i=0;i<8;i++)

{

value=value>>1;

if(irdata[k]>6)

{

value=value | 0x80;

}

k++;

}

ircode[j]=value;

}

irprosok=1;

}

void main()

{

timer0init();

int0init();

while(1)

{

if(irreceok)

{

irpros();

irreceok=0;

}

if(irprosok)

{

irwork();

irprosok=0;

}

display();

}

}

void timer0 () interrupt 1

{

irtime++;

}

void int0 () interrupt 0

{

if(startflag)

{

if(irtime>32) //檢測引導碼

{

bitnum=0;

}

irdata[bitnum]=irtime;

irtime=0;

bitnum++;

if(bitnum==33)

{

bitnum=0;

irreceok=1;

}

}

else

{

startflag=1;

irtime=0;

}

}