Help Needed for CSerialPort v1.27

[Kappa3141]

I'm trying to get a C++ MFC SDI working using VS 2008 which takes a 6-bit binary value sent from a PIC16f877a through an RS232 line to a GUI. All I need the GUI to do is display the value sent to it, by an event handler on a button. I'm using Naughter's CSerialPort v1.27 (http://www.naughter.com/serialport.html).

So my code compiles ok, but doesn't display anything. I'm a complete beginner to C++ and MFC but this is the code I have for the event handler:

void CWECSGUI10View::OnBnClickedBtnVlt()
{
	// TODO: Add your control notification handler code here

	try
	{

	// opens comport 1
	CSerialPort port;
    port.Open(1, 115200, CSerialPort::NoParity, 8,
		CSerialPort::OneStopBit,
		CSerialPort::XonXoffFlowControl, TRUE);

	// reads RS232 input
	port.Read(m_Voltin,1);

	// display data
	CString strVoltage;
	double voltage;
	strVoltage.Format(_T("%.3f"), voltage);
	this->m_Voltin.SetWindowTextW(strVoltage);

	port.Flush();
	port.Close();

	}

	catch (CSerialException* pEx)
	{
		TRACE(_T("Handle Exception, Message:%s\n"),
			pEx->GetErrorMessage());

	pEx->Delete();
	}

}

What am I doing wrong and how can I correct it?


Just to make the information complete, on the PIC side of things I'm compiling with BoostC. My code has been verified with another app to send a 6-bit value through a 10-bit ADC module but here it is anyway:

#include <rs232_driver.h>
#include <adc.h>

.... default configuration etc ...

	while( 1 )
	{
		voltage = adc_measure(0)>>4;
		delay_ms( 250 );
		uart_init(1,10); 
   		putc(voltage);
	}

Also to make the information complete, I added the m_Voltin variable to the form class as a public control edit variable.