第1个回答 2018-12-21
#include<reg51.h>
#define uchar unsigned chr
#define uint unsigned int
uint cnt;
sbit pluse=P1^7;
void t0isr() interrupt 1
{
TH0=(65536-1000)/256;
TL0=(65536-1000)%256;
cnt++;
cnt%=1000;
if(cnt<1)pluse=1;
else pluse=0;
}
main()
{
TMOD=0x01;
TH0=(65536-1000)/256;
TL0=(65536-1000)%256;
TR0=1;
ET0=1;
EA=1;
while(1);
}本回答被网友采纳