串口通讯程序.txt

51单片机串口c版通讯程序可实现51单片机的串口通讯

#include <reg52.h> 
#include<intrins.h>
#include <stdio.h>
#include <math.h>

#define uchar unsigned char 
#define uint unsigned int 

sbit Key1 = P2^3;

sbit Key2 = P2^2;

sbit Key3 = P2^1;

sbit Key4 = P2^0;

sbit BELL = P3^6;
sbit CONNECT = P3^7;

unsigned int  Key1_flag = 0;
unsigned int  Key2_flag = 0;
unsigned int  Key3_flag = 0;
unsigned int  Key4_flag = 0;
unsigned char b;
unsigned char code Num[21]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,
                            0x90,0x40,0x79,0x24,0x30,0x19,0x12,0x02,0x78,0x00,
                            0x10,0x89}; 
unsigned char code Disdigit[4] = {0x7F,0xBF,0xDF,0xEF};
unsigned char Disbuf[4];

void delayms(uint t)
{
 uint i;
 while(t--)
 {
  /* 对于11.0592M时钟，约延时1ms */
  for (i=0;i<125;i++)
  {}
 }
} 

 

//-----------------------------------------------------

void SendData(uchar Dat)
{
uchar i=0;
SBUF = Dat;
while (1)
  {
    if(TI)
      {
        TI=0;
        break;
   }
  } 
}

void ScanKey()
{
    if(Key1 == 0)
    {
       delayms(100);
    if(Key1 == 0)
    {
       Key1_flag = 1;
       Key2_flag = 0;
    Key3_flag = 0;
    Key4_flag = 0;
       Key1 = 1;
    }
    else;
    }
    if(Key2 == 0)
    {
    delayms(100);
    if(Key2 == 0)
    {
       Key2_flag = 1;
       Key1_flag = 0;
    Key3_flag = 0;
    Key4_flag = 0;
    Key2 = 1;
    }
    else;
    }
   if(Key3 == 0)
    {
    delayms(50);
    if(Key3 == 0)
    {
       Key3_flag = 1;
       Key1_flag = 0;
    Key2_flag = 0;
    Key4_flag = 0;
    Key3 = 1;
    }
    else;
    }
 if(Key4 == 0)
    {
    delayms(50);
    if(Key4 == 0)
    {
       Key4_flag = 1;
       Key1_flag = 0;
    Key2_flag = 0;
    Key3_flag = 0;
    Key4 = 1;
    }
    else;
    }
 else;  
}
void KeyProc()
{
    if(Key1_flag)
    {
     TR1 = 1;
  SendData(0x55); 
     Key1_flag = 0;     
 }   
 else if(Key2_flag)
    {
     TR1 = 1;
     SendData(0x11);    
     Key2_flag = 0;  
    }
    else if(Key3_flag)
    {
    P1=0xff;
    BELL = 0;
 CONNECT = 1;
    Key3_flag = 0;
    }
 else if(Key4_flag)
 {
 CONNECT = 0;
 BELL = 1;
    Key4_flag = 0;
 }
    else;      
}

void Initdisplay(void)
{
Disbuf[0] = 1;
Disbuf[1] = 2;
Disbuf[2] = 3;
Disbuf[3] = 4;
}

void Display()     //显示
{
unsigned int     i = 0;
unsigned int temp,count;
        temp = Disdigit[count];    
  P2 =temp;
  temp = Disbuf[count];
  temp = Num[temp];
        P0 =temp;
        count++;      
    if  (count==4)
        count=0;        
}   
 
void time0() interrupt 1  using 2
{  
   Display();   
  TH0 = (65535 - 2000)/256;
  TL0 = (65535 - 2000)%256;
}
  
void main()
{
Initdisplay();
TMOD = 0x21;
TH0 = (65535 - 2000)/256;
TL0 = (65535 - 2000)%256;
TR0 = 1;
ET0 = 1;  
TH1 = 0xFD; //11.0592M
TL1 = 0xFD;
PCON&=0x80;
TR1 = 1;
ET1 = 1;
SCON = 0x40; //串口方式
REN = 1; 
PT1 = 0;
PT0 = 1;
EA = 1;

  while(1)
  {
   ScanKey(); 
   KeyProc();     
   
   if(RI)
   {
   Disbuf[0] = 0;
   Disbuf[1] = 20;
   Disbuf[2] = SBUF>>4;
   Disbuf[3] = SBUF&0x0f;
   RI = 0;
   }
   else;    
  }
}