STC89C52 单片机 AD0804 AD基本操作小灯加数码管显示

#include
#define uchar unsigned char
#define uint unsigned int
uint disnum,a;
sbit adrd=P3^7;
sbit adwr=P3^6;
sbit dula=P2^6;
sbit wela=P2^7;
uchar code table_du[]={
0x3f,0x06,0x5b,0x4f,0x66,0x6d,
0x7d,0x07,0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
delay(uchar);
display(uint);
void main()
{ //注意云龙讲的是先送段码，发现仿真不好使，这里先送位码才好使
while(1)
{
wela=1;
P0=0x7f;
adwr=1;
adwr=0;
adwr=1;

	delay(10);
	
	P1=0xff;
	adrd=1;
	adrd=0;
	disnum=P1;
	adrd=1;
	P1=disnum;
//	delay(250);	这里250实物可以  延时必须足够的长
	for(a=50;a>0;a--)
	display(disnum);
}

}

delay(uchar x)
{
uchar a,b;
for(a=x;a>0;a–)
for(b=200;b>0;b–);

}

display(uint disnum)
{

dula=0;
wela=0;

P0=0xfe;
wela=1;
wela=0;
P0=table_du[disnum/100];
dula=1;
dula=0;
delay(10);

dula=0;
wela=0;
P0=0xfd;
wela=1;
wela=0;	
P0=table_du[disnum%100/10];
dula=1;
dula=0;
delay(10);

dula=0;
wela=0;
P0=0xfb;
wela=1;
wela=0;
P0=table_du[disnum%10];
dula=1;
dula=0;
delay(10);

}