原创 串口通讯Proteus

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//查询方式

/*---------------------------------------------------------------*/
//Proteus串口通讯
//按下按钮，单片机发送数据"Hello! I am glad to see you again.\r"给主机

/*---------------------------------------------------------------*/
#include<reg52.h>
#include<intrins.h>

/*---------------------------------------------------------------*/
sbit K1 = P1^2;

/*---------------------------------------------------------------*/
unsigned char tmp;
unsigned char code str[]={"Hello! I am glad to see you again.\r"};

/*---------------------------------------------------------------*/
void send_str(void);
void send_char(unsigned char txd);
void delayms(void);

/*---------------------------------------------------------------*/
void main(void)
{
 TMOD = 0x20; //Timer1,8bits reload mode use to creat bps
 TH1  = 0xfd; //9600bps
 TL1  = 0xfd; 

 SCON = 0x50; //com mode1  enable Receive  
 PCON = 0x00; //no double bps
// PCON &=0xef;

 TR1 = 1;  //start Timer1
 IE  = 0x00;  //forbid any interrupt

 while(1)
 {
  if(K1==0){delayms();if(K1==0){send_str();while(K1==0);}}

  if(RI)    //data in ?
  {
   RI = 0;
   tmp = SBUF;  //save the received data
   delayms();
   P0 = tmp;  //transmite data to the port P0
   send_char(tmp); //回传接收到的数据
  }
 }
}

/*---------------------------------------------------------------*/
//传送一个字符
void send_char(unsigned char txd)
{
 SBUF = txd;
 while(!TI);  //wait for sending over
 TI = 0;   //software clear the flag
}

/*---------------------------------------------------------------*/
//传送字符
void send_str(void)
{
 unsigned char i="0";
 while(str!='\0')
 {