Communication between MCU and Serial Port 232 (Continued)-EEWORLD

Collect

Purpose: After sending data through the serial port sending area, the serial port receiving area receives the sent data. //Note whether the serial port setting is hexadecimal or ASIIC code? If it is hexadecimal, the first data received is 00. If it is ASIIC, no data is displayed.

program:

#include
bit point=1; //flag bit
unsigned char temp;
unsigned char i;

//---------------------------------------------------------
void init() //Serial port initialization
{
TMOD=0x20;
SCON=0x50;
TH1=0xfD;
TR1=1;
ES=1;
EA=1;
}

//------------------------------------------------ -------------------------------
void send()
{
SBUF=temp;
while(TI==0);
TI= 0;

}

//----------------------------------------------------------------------------------
void UART ()interrupt 4 //Serial communication interrupt
{
  if(RI==1)
   {
     RI=0;
     temp=SBUF;
     point=1;
     for(i=0;i<10;i++);
   }
}

//------------------------------------------------ -------------------------------------
void main()
{
  temp=0x00;
  init();
  while(1)
{
   if(point==1)
   {
    point=0;
    send();
   }
}
}

Keywords：MCU Communication Reference address：Communication between MCU and Serial Port 232 (Continued)

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