51单片机按键计数器C语言编程

Question

51单片机按键计数器C语言编程按图编程

Answer 1

#include<reg51.h>
#define uchar unsigned char;
uchar distab[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x00};  //0到f
uchar number,dat,dis[4];
void t0isr() interrupt 1
{
TH0=(65536-5000)/256;
TL0=(65536-5000)%256;
number++;
number%=3;
switch(number)
P1=0x20<<number;
P0=distab[dis[number]];
}
void int0isr() interrupt 0
{
dat++;
dat%=1000;
dis[0]=dat%10;
dis[1]=dat%100/10;
dis[2]=dat/100;
}
main()
{
TMOD=0x01;
TH0=(65536-5000)/256;
TL0=(65536-5000)%256;
TR1=1;
ET1=1;
EX0=1;
IT0=1;
EA=1;
while(1);
}