1s左移一個并且1s喇叭響一下

ID:65282 · 發(fā)表于 2014-8-20 19:30

#include<reg52.h>

unsigned char t=20;
unsigned char table[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};

sbit P0_0=P0^0;
void int0();

void main()
{
   int0();
   while(1);
}

void int0()
{
TMOD=1;
EA=1;
ET0=1;
TR0=1;
TL0=(65536-50000)%256;
TH0=(65536-50000)/256;
}

void int0_0() interrupt 1
{
  static unsigned char i=7;
  TL0=(65536-50000)%256;
TH0=(65536-50000)/256;
while(!t--)
{
P1=table[i--];
if(-1==i)
{
i=7;
}
P0_0=!P0_0;
t=20;
}
}