52单片机的编程中程序跑飞问题

只看该作者 · 2009-3-3 12:20

用89S52编了一个交通灯的程序，但是在运行一段时间后出现死机现象，怀疑是程序跑飞了，不知道是什么原因，哪位大侠帮我看一下啊，怎么改？？
#include "reg52.h"

#define    unchar  unsigned char
#define    uint  unsigned int

sbit bule0   =P1^7 ;
sbit yellow0 =P1^6;
sbit red0    =P1^5;
sbit bule1   =P1^4;
sbit yellow1 =P1^3;
sbit red1    =P1^2;

//*******************************
//       延时
//*******************************

void delay_50ms(uint t)
{
    uint j;
    for(;t>0;t--)
    {
        for(j=6245;j>0;j--) ;
    }
}

void state1()
{
    bule0   =0;
    yellow0 =1;
    red0    =1;
    bule1   =1;
    yellow1 =1;
    red1     =0;
}
void state2()
{
    bule0   =1;
    yellow0 =0;
    red0    =1;
    bule1   =1;
    yellow1 =1;
    red1     =0;
}
void state3()
{
    bule0   =1;
    yellow0 =1;
    red0    =0;
    bule1   =0;
    yellow1 =1;
    red1     =1;
}
void state4()
{
    bule0   =1;
    yellow0 =1;
    red0    =0;
    bule1   =1;
    yellow1 =0;
    red1     =1;
}

void main ()
{
    P1 = 0XFF;
    //delay_50ms(100);
    while(1)
    {
         state1();
        delay_50ms(400); // 延时 20S
        state2();
        delay_50ms(100); // 延时 5S
        state3();
        delay_50ms(400);
        state4();
        delay_50ms(100);
    }
}

怀疑是延时哪里的问题