#include<reg52.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
sbit dula=P2^6;
sbit wela=P2^7;
sbit rd=P3^7;
sbit wr=P3^6;
uchar f1,f2,f3;
uchar num,i,flag;
uchar code table[]={0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71,0};
void delay(uchar z)
{
uchar i,j;
for(j=z;j>0;j--)
for(i=110;i>0;i--);
}
void display(f1,f2,f3)
{
uchar i=3;
wela=1;
P0=0xfe;
wela=0;
P0=0xff;
dula=1;
P0=table[f1];
dula=0;
delay(i);
wela=1;
P0=0xfd;
wela=0;
P0=0xff;
dula=1;
P0=table[f2];
dula=0;
delay(i);
wela=1;
P0=0xfb;
wela=0;
P0=0xff;
dula=1;
P0=table[f3];
dula=0;
delay(i);
}
void init()
{
EA=1;
TMOD=0x01;
ET0=1;
TH0=(65536-54250)/256;//50ms //1ms 1085
TL0=(65536-54250)%256;//50ms
}
void stay()
{
//AD 启动
wela=1;
P0=0x7f;
wela=0;
_nop_();
wr=0;
_nop_();//1.085us
wr=1;
_nop_();
wela=1;
P0=0xff;
wela=0;
_nop_();
}
void read()
{
//AD 读取
wela=1;
P0=0x7f;
wela=0;
P1=0xff;
rd=0;
_nop_();
num=P1;
rd=1;
wela=1;
P0=0xff;
wela=0;
}
void main()
{
init();
TR0=1;
P1=0xff;
while(1)
{
if(!flag)
{
stay();
read();
f3=num%10;
f2=num/10%10;
f1=num/100;
}
display(f1,f2,f3);
}
}
void setTime0() interrupt 1
{
TH0=(65536-54250)/256;//50ms //1ms 1085
TL0=(65536-54250)%256;//50ms
i++;
if(i==10)
{
flag=!flag;
i=0;
}
}
