单片机数码管动态扫描

ID:72519 · 发表于 2015-1-21 23:31

是用51hei单片机开发板电路图详见：http://www.51hei.com/f/51hei-5.pdf 的数码管部分，用2个74hc573 锁存，p0口作为数据口，注意图中要改一下p3.6和p3.7分别是段和位的锁存端口.P2口上面是按键 p1口上面是8个led灯.

#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
uchar code DIS_SEG7[16]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
uchar code DIS_BIT[8]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
sbit D=P3^6;
sbit V=P3^7;
//==============
void delay(uint k)
{
uint data i,j;
for(i=0;i<k;i++){
for(j=0;j<121;j++)
{;}}
}
//===================
void main(void)
{
uchar cnt;
while(1)
{
for(cnt=0;cnt<8;cnt++)
{D=1;P0=DIS_SEG7[cnt+1];D=0;P0=0xff;V=1;P0=DIS_BIT[cnt];V=0;
delay(1);}
}
}

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