--
单片机程序
#include<reg52.h>
#include uchar unsigned char
sbit dula=P2^6;
sbit wela=P2^7;
sbit dianji=P1^7;
sbit jia_key=P3^6;
sbit jian_key=P3^7;
uchar num=0,show_num=1,gao_num=1,di_num=3;
uchar code
table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void delay(uchar i)
{
uchar j,k;
for(j=i;j>0;j--)
for(k=125;k>0;k--);
}
void display()
{
dula=0;
P0=table[show_num];
dula=1;
dula=0;
wela=0;
P0=0xfe;
wela=1;
wela=0;
delay(5);
P0=table[0];
dula=1;
dula=0;
P0=0xfd;
wela=1;
wela=0;
delay(5);
P0=table[0];
dula=1;
dula=0;
P0=0xfb;
wela=1;
wela=0;
delay(5);
P0=table[0];