单片机89c51控制继电器程序

Question

想用单片机控制继电器开断，求程序呀 开短时间为2分钟就好

Answer 1

很好做呀
#include<reg51.h>
sbit key=P1^0;
sbit jdq=P2^0;
main()
{
unsigned int times;
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
while(1)
{
if(key==0)

{
while(key==0);

jdq=0;

TR0=1;

times=0;

while(times>=2400)

{
while(TF0==0);

TF0=0;

TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
times++;

}

jdq=1;

TR0=0;

}

}

}

Answer 2

#include<reg51.h>
sbit key=P1^0;
sbit jdq=P2^0;
main()
{
unsigned int times;
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
while(1)
{
if(key==0)

{
while(key==0);

jdq=0;

TR0=1;

times=0;

while(times>=2400)

{
while(TF0==0);

TF0=0;

TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
times++;

}

jdq=1;

TR0=0;

}

}

}