51单片机 定时器0中断实现1秒LED流水灯

使用定时器0中断实现LED1秒的流水灯

#include

typedef unsigned int u16;

typedef unsigned char u8;

u8 code LED[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};

u16 time,i;

void timer0init()

{

TMOD=0x01;

ET0=1;

EA=1;

TR0=1;

TH0=(65536-50000)/256;

TL0=(65536-50000)%256;

}

void main()

{

timer0init();

while(1);

}

void timer0() interrupt 1

{

  TH0=(65536-50000)/256;

TL0=(65536-50000)%256;

time++;

if(time==20)

{

P2=LED[i];

i++;

if(i==8)

{

i=0;

}

time=0;

}

}