#include<reg51.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
sbit CLK=P1^3;
sbit ST=P1^2;
sbit EOC=P1^1;
sbit OE=P1^0;
uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
void delay(uint z);
void display(uchar d);
void main()
{
TMOD=0x02;//方式2特別適合于用作較精確的脈沖信號(hào)發(fā)生器
TH0=0x14;
TL0=0x00;//8自動(dòng)重裝定時(shí)器
EA=1;
ET0=1;
TR0=1;
P1=0x3f;//選擇通道三,注意：通道選擇的不一樣，顯示的結(jié)果也將不一樣
while(1)
{
ST=0;
ST=1;
ST=0;//start一個(gè)高脈沖啟動(dòng)AD0808;
while(!EOC);
OE=1;
display(P3);
OE=0;
}
}
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void display(uchar d)
{
P2=0xff;
P2=0xf7;
P0=table[d%10];
delay(5);
P2=0xff;
P2=0xfb;
P0=table[d%100/10];
delay(5);
P2=0xff;
P2=0xfd;
P0=table[d/100];
delay(5);
}
void timer0() interrupt 1
{
CLK=~CLK;
}