看看网上找到的这个能用不？
#include"reg52.h"
#include<intrins.h>
#define uint unsigned int
#define uchar unsigned char
sbit cs = P3^2;
long int read=0;
sbit wela = P2^7;
sbit dula = P2^6;
sbit lcden=P3^4;
sbit lcdrs=P3^5;
uchar bai,shi,ge,num;
uchar table[] ="123456789";
void delayms(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y-- );
}
void write_com(uchar com)
{
lcdrs=0;
P0=com;
delayms(5);
lcden=1;
delayms(5);
lcden=0;
}
void write_data(uchar date)
{
lcdrs=1;
P0=date;
delayms(5);
lcden=1;
delayms(5);
lcden=0;
}
void init()
{
dula=0;
wela=0;
lcden=0;
write_com(0x38);
write_com(0x0c);
write_com(0x06);
write_com(0x01);
}
void delay(uint a) // a 个1us延时
{
for(;a > 0;a --)
_nop_();_nop_();
}
void T0_time() interrupt 1
{
cs = 0;
RD = 0;
read = P1;
INT0 = 1;
}
uint adc0804()
{
TMOD=0X01;
TH0=(65536-45872)/256;
TL0=(65536-45872)/256;
EA=1;
ET0=1;
TR0=1;
INT0 = 1;
cs = 0;
WR = 0;
delay(255);
cs = 1;
WR = 1;
delay(200);
read = read * 196 /100;
return read;
}
void math(uint x)
{
bai = x / 100;
shi = x /10 % 10;
ge = x % 10;
}/*
void display()
{
math(adc0804());
dula=1;
P0 = table[bai+10];
dula=0;
P0=0xff;
wela = 1;
P0 = 0xfe;
wela=0;
delay(7000000);
dula=1;
P0 = table[shi];
dula=0;
P0=0xff;
wela = 1;
P0 = 0xfd;
wela=0;
delay(7000000);
dula=1;
P0 = table[ge];
dula=0;
P0=0xff;
wela = 1;
P0 = 0xfb;
wela=0;
delay(7000000);
}
*/
void main()
{
cs=0;
init();
while(1)
{
math(adc0804());
write_com(0x80+5);
write_data(table[bai]);
write_data(table[shi]);
write_data(table[ge]);
delayms(500);
}
}
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