简易单片机车辆里程表源程序+Proteus仿真 -

#include <REG52.H>
#define uchar unsigned char
#define uint unsigned int
uint count_km; //记录里程数
uchar count0,count1,count2,count3;//用于分离里程数的各位数字
sbit P20=P2^0;
sbit P21=P2^1;
sbit P22=P2^2;
sbit P23=P2^3;
const uchar table0[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};//显示码显示数字0~9
void delay()
{
uint i;
for(i=0;i<256;i++);
}
void timer0isr(void) interrupt 1 using 1
{
count_km=count_km + 1500;
if(count_km>9999)
count_km=9999;
}
void main(void)
{
TMOD = 0x06; //设定T/C0工作在计数器，工作方式2
TH0 = 0xFB;
TL0 = 0xFB; //装载计数初值
EA = 1; //开总中断
ET0 = 1; //开T/C0中断
TR0 = 1; //启动T/C0
while(1)
{
count0=count_km%10;
count1=count_km/10%10;
count2=count_km/100%10;
count3=count_km/1000%10;
P1=table0[count0];
P23=1;delay();P23=0;
P1=table0[count1];
P22=1;delay();P22=0;
P1=table0[count2];
P21=1;delay();P21=0;
P1=table0[count3];
P20=1;delay();P20=0;
}
}

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