getting problem in receiving data from serial port

[parvathireddy]

I need to receive data from pc to Pos using serial port RS 232 . I am receiving data but garbage values and overlapping is occuring.

// data received //

ret=(PortRecvs(0,buff,sizeof(buff)-1,1000)<0);

/// 0 is comport, 1000=time in ms//
//********Explain me from here****////

// comparing the data//

if(ret<0)       
	        { 
				ScrCls();
				Lcdprintf("Receive Fail..");
				DelayMs(500);
		   }
		else
		  {
				ScrCls();
				Lcdprintf("Receive Buff:\n%s\n",buff);//j=12
				DelayMs(1000);
		  }
		break;
	}

// now i need to validate the data and again i should send////


thanks in advance

[donbock]

Tell me about this PortRecvs() function.

• Did you write it?
• Does this function access the RS-232 hardware or does it interact with an interrupt service routine?
• What operating system is being used?
• How big is the receiver buffer in the RS-2332 hardware? In the interrupt service routine?

Are you sure the transmitter and receiver RS-232 channels are configured properly (data bits, parity, baud rate)?