serial.c

x5045三线制总线读写程序,通过keil C验证OK!

#include "serial.h"

/*************************************************
  Function:        Init_serial
  Description:     对串口中断的的初始化程序
                   定时器T1做为波特率发生器，波特率设置为：9600
  Calls:           
  Called By:      
  			 void main(void)
  Input:    
  			   
  Output:    
  Return:    
  Others:    
*************************************************/

void init_serial(void)
{
	//定时器初始化
	TH1   = BAUD_9600; // 波特率发生器
	TL1   = TH1;
	PCON = 0x80;	//波特率加倍                         
    SCON = 0x52;      // Serial mode1, enable receiver
	TMOD  = 0x20;        //定时器1工作在方式2
	TR1=1;			  // Start timer1,TR1=1  
   // TCON = 0x40;     // Start timer1,TR1=1  
}

void PutChar(char x)
{
    while(!TI);
    TI = 0;
    SBUF = x;
 
}

unsigned char GetChar(void)
{
  
   	while(!RI);
    RI=0;
    return SBUF;
}


/*void UartSendMultiByte(unsigned char ucLong,unsigned char * pBuf)
{  unsigned char i;
   ES = 0;
   for( i = 0; i < ucLong ; i++)
   {
   	 SBUF = pBuf[i];
	 while(!TI)
	 TI = 0;
   }
   ES = 1;
/}*/