我在做51数码管动态显示的实验,出了问题,怎么也没找出来
硬件连接如下,8个数码管的位选接P2口,段选接P0口,
现要让8个数码管显示12345678,程序如下,看看那里出了问题
#include<reg52.h>
#define uchar unsigned char
uchar aa,numd,numw;
uchar code table[]={
0xc0,0xf9,0xa4,0xb0,
0x99,0x92,0x82,0xf8,
0x80,0x90,0x88,0x83,
0xc6,0xa1,0x86,0x8e};
uchar code tablew[]={
0xfe,0xfd,0xfb,0xf7,
0xef,0xdf,0xbf,0x7f};
void mian()
{
numw=0;
numd=0;
aa=0;
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
TR0=1;
while(1)
{
if(aa==20)
{
aa=0;
numd++;
if(numd==9)
numd=1;
P0=table[numd];
numw++;
if(numw==8)
numw=0;
P2=tablew[numw];
}
}
}
void timer0() interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
aa++;
} |
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