51单片机驱动ADC0809的C语言程序

#include
#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特别适合于用作较精确的脉冲信号发生器
        TH0=0x14;
        TL0=0x00;//8自动重装定时器
        EA=1;
        ET0=1;
        TR0=1;
        P1=0x3f;//选择通道三,注意：通道选择的不一样，显示的结果也将不一样
        while(1)
        {
                ST=0;
                ST=1;
                ST=0;//start一个高脉冲启动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;
}