我在練習(xí)數(shù)碼管循環(huán)顯示時(shí)，奇數(shù)次循環(huán)沒有問題如第一張圖，偶數(shù)次循環(huán)都會(huì)出現(xiàn)第二張圖的問題，反復(fù)看了代碼感覺沒有問題，還想請(qǐng)教各位我這里是出現(xiàn)了什么問題，謝謝
偶數(shù)次循環(huán)到4時(shí)出錯(cuò)
奇數(shù)次循環(huán)無錯(cuò)誤
#include<reg52.h>
#include<intrins.h>
#define uint unsigned int
#define uchar unsigned char
uchar code tabledu[]={0x06,0x5b,0x4f,0x66,0x6d,0x7d}; //,0x07,0x6f,0x77,0x7c,0x58,0x5e,0x7b,0x71};
uchar code tablewe[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf}; //,0xbf,0x7f};
sbit wela=P2^7;
sbit dula=P2^6;
uint a,num1,num2;
void init();
void main()
{
init();
while(1)
{
if(a==20)
{
num1++;
num2--;
if(num1>5)
{
num1=0;
num2=5;
}
P0=tablewe[num1];
wela=1;
wela=0;
P0=tabledu[num2];
dula=1;
dula=0;
a=0;
}
}
}
void init()
{
TMOD=0x11;
TH1=(65536-50000)/256;
TL1=(65536-50000)%256;
EA=1;
ET1=1;
TR1=1;
num1=0;
num2=5;
wela=1;
P0=tablewe[num1];
wela=0;
dula=1;
P0=tabledu[num2];
dula=0;
}
void timer1() interrupt 3
{
a++;
TH1=(65536-50000)/256;
TL1=(65536-50000)%256;
}
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