定时器在数码管静态显示中的应用

ID:82008 · 发表于 2015-6-5 00:32

电路图详见:http://www.51hei.com/f/51hei-5.pdf

#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
sbit dx=P2^6;
sbit wx=P2^7;
sbit fmq=P2^3;
uchar number,a;

uchar table[]=
{
0x3f,0x06,0x5b,0x4f,0x66,0x6d,
0x7d,0x07,0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71,0x00

};
void main()
{
number=0;
a=0;
EA=1;
ET0=1;
TMOD=0X01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
TR0=1;

dx=1;
P0=0x00;
dx=0;

wx=1;
P0=0xc0;
wx=0;

while(1)
{
//fmq=0;
if(a==20)
{
a=0;
dx=1;
P0=table[number];
dx=0;
// fmq=1;
number++;
if(number==16)
number=0;
}
}
}
void dsq() interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
a++;
}

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