用3位数码管显示计数器T1对外部计数的计数值，计满50后显示输出FULL。

ID:554134 · 发表于 2019-6-3 20:55

#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
unsigned char Tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
unsigned char x;
sbit P34=P3^4;

void delaylms(uint i)
{
uchar j;
while(i--)
for(j=0;j<115;j++);
}

void Display(unsigned int x)
{
P2=0x20;
P0=Tab[x/100];
delaylms(1);
P2=0x40;
P0=Tab[x%100/10];
delaylms(1);
P2=0x80;
P0=Tab[x%10];
delaylms(1);
}
void main(void)
{
TMOD=0x06;
   EA=1;
   ET0=1;
   EX0=1;
   IT0=1;
   TH0=TL0=256-1;
   TR0=1;
   while(1)
Display(x);
}

void Time0(void) interrupt 1
{
  x=0;
}

void Time1(void) interrupt 2
{
x=(x+1)%1000;
if(x==50)
x=0;
}

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