5．C語(yǔ)言源程序

#include AT89X52.H>

unsigned char code ps[]={1,2,3,4,5};

unsigned char code dispcode[]={0x3f,0x06,0x5b,0x4f,0x66,

0x6d,0x7d,0x07,0x7f,0x6f,0x00,0x40};

unsigned char pslen=9;

unsigned char templen;

unsigned char digit;

unsigned char funcount;

unsigned char digitcount;

unsigned char psbuf[9];

bit cmpflag;

bit hibitflag;

bit errorflag;

bit rightflag;

unsigned int second3;

unsigned int aa;

unsigned int bb;

bit alarmflag;

bit exchangeflag;

unsigned int cc;

unsigned int dd;

bit okflag;

unsigned char oka;

unsigned char okb;

void main(void)

{

unsigned char i,j;

P2=dispcode[digitcount];

TMOD=0x01;

TH0=(65536-500)/256;

TL0=(65536-500)%6;

TR0=1;

ET0=1;

EA=1;

while(1)

{

if(cmpflag==0)

{

if(P3_6==0) //function key

{

for(i=10;i>0;i--)

for(j=248;j>0;j--);

if(P3_6==0)

{

if(hibitflag==0)

{

funcount++;

if(funcount==pslen+2)

{

funcount=0;

cmpflag=1;

}

P1=dispcode[funcount];

}

else

{

second3=0;

}

while(P3_6==0);

}

}

if(P3_7==0) //digit key

{

for(i=10;i>0;i--)

for(j=248;j>0;j--);

if(P3_7==0)

{

if(hibitflag==0)

{

digitcount++;

if(digitcount==10)

{

digitcount=0;

}

P2=dispcode[digitcount];

if(funcount==1)

{

pslen=digitcount;

templen=pslen;

}