#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit dula=P2^6;
sbit wela=P2^7;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71,0};
uchar bai,shi,ge,i;
uint a1,a2,num;
void init_com()
{
dula=0;
wela=0;
TMOD=0x20;
TH1=0xfd;
TL1=0xfd;
TR1=1;
SM0=0;
SM1=1;
REN=1;
EA=1;
ES=1;
num=0;
bai=16;
shi=16;
ge=16;
a1=0;
a2=0;
}
void display(uchar bai_,uchar shi_,uchar ge_)
{
P0=table[bai_];
dula=1;
dula=0;
P0=0xf7;//位选择用0
wela=1;
wela=0;
P0=table[shi_];
dula=1;
dula=0;
P0=0xef;//位选择用0
wela=1;
wela=0;
P0=table[ge_];
dula=1;
dula=0;
P0=0xdf;//位选择用0
wela=1;
wela=0;
}
void main()
{
init_com();
while(1)
{
display(bai,shi,ge);
}
}
void ser() interrupt 4 //RI等于1就会进入中断服务
{
i++;
if(i==1)
{
P1=SBUF;
a1=SBUF; //RI等于1，说明读SBUF中已经接收完一帧数据,读取读SBUF完以后，没有像RI=1的提醒标志，故设立FLAG
RI=0;
}
if(i==2)
{
a2=SBUF;
num=(a1<<8)|a2;
RI=0;
i=0;
}
bai=a/100;
if(bai==0)
bai=16;
shi=a%100/10;
if(shi==0)
{
if(bai==16)
shi=16;
}
ge=a%10;
}
