單片機流水燈程序，不調用左右移動函數的程序，急～～

//假設晶振12MHZ，P1控制8個LED低電平亮

#include

"reg51.h"

unsigned

int

YSJS=0;

signed

char

LED=0XFE;

void

main(void)

{

TMOD

|=

0X10;

//定時器1工作於方式1,16位定時器

TH1

=

0XFE;

//定時器1定時時間=500uS

TL1

=

0X0C;

ET1

=

1;

//使能定時器1中斷

EA

=1;

//開總中斷

P1

=

LED;

while(1)

{

}

}

void

TIMER1(void)

interrupt

3

//定時器1中斷函數使用默認寄存器組

{

TH1

=

0XFE;

//定時器1定時時間=500us

TL1

=

0X0C;

YSJS++;

if(YSJS==1000)

//500uS*1000=500000us=0.5s,可調整

{

P1

=

LED;

LED=LED<<1

LED=LED

|

1

if(LED==0XFF)LED=0XFE;

YSJS

=

0

}

}