51单片机VB串口继电器控制实验

51单片机VB串口继电器控制实验- C51源代码

//按K1 继电器吸合

//按K2 继电器断开

/*********************************************************/

#include

sbit K1 =P3^2;//K1

sbit K2 =P3^3;//K2

sbit JDQ=P3^7;//继电器unsigned char inbuf2[5];//接收缓冲区

unsigned char count3;

void init_serialcomm(void)

{

SCON =0x50;//SCON: serail mode 1, 8-bit UART, enable ucvr TMOD |=0x20;//TMOD: timer 1, mode 2, 8-bit reload

PCON |=0x80;//SMOD=1;

TH1 =0xFA;//Baud:4800 fosc=11.0592MHz

IE |=0x90;//Enable Serial Interrupt

TR1=1;

}

//串口接收中断函数

void serial () interrupt 4 using 3

{

if(RI)//RI==开始接收

{

unsigned char ch;

RI =0;//软件RI=0

ch=SBUF;

if(ch>1)

{

count3=0;

inbuf2[count3]=ch;

}

else

{

count3++;

inbuf2[count3]=ch;

}

}

}

/*********************************************************/ void Delay(unsigned int ii)//1MS

unsigned int jj;

for(;ii>0;ii--)

for(jj=0;jj<125;jj++)

{;}

}

void main()

{ init_serialcomm();

JDQ=0;

EA =1;//允许CPU中断while(1){

if(inbuf2[0]==0x31){

JDQ=1;//吸合

P0=0x00;//P0口LED亮

}

if(inbuf2[0]==0x32){

JDQ=0;//吸合

P0=0xff;//P0口LED亮

}

if(K1==0)

{

Delay(10);

if(K1==0){

inbuf2[0]=0x00;

JDQ=1;//吸合

P0=0x00;//P0口LED亮

}

}

if(K2==0){

Delay(10);

if(K2==0){

inbuf2[0]=0x00;

JDQ=0;//释放

P0=0xff;//P0口LED灯灭

}

}

}