Reading Bytes from Serial Ports

[firstoption]

Good day to all,
Please I need your guide and support on how to use this function:

ftStatus = myFtdiDevice.Read(readData, numBytesAvailable,ref numBytesRead);

to read byte from the serial port.This function is part of the DLL that came with the chip(FT2232D) I am using on my board.I want to use the function to read a byte from the serial port and then send the value to the Graphic user interface.Unfortunately I was unable to get the expected value on my GUI.If I send for instance 40,what I get on the GUI are letters instead of the number 40 or at times the GUI will not even respond.Below are my lines of code I used to read the byte from the serial port:

The following instructions are executed whenever the CHECKBOX is checked

private
void checkBox1_CheckedChanged(object sender, EventArgs e)

         {

             
 
UInt32 numBytesRead = 0;

             
UInt32 numBytesAvailable = 1;

             ftStatus = myFtdiDevice.Read(readData, numBytesAvailable, ref numBytesRead);
 

             label11.Text =Convert.ToString(ftStatus);



  
  
 
  

         }

Below is the definition of the function from the supplied library:

  Read data from an open FTDI device.

        
//

        
// Parameters:

        
//   dataBuffer:

        
//     An array of bytes which will be populated with the data read from the device.

        
//

        
//   numBytesToRead:

        
//     The number of bytes requested from the device.

        
//

        
//   numBytesRead:

        
//     The number of bytes actually read.

        
//

        
// Returns:

        
//     FT_STATUS value from FT_Read in FTD2XX.DLL

        
publicFTDI.FT_STATUS Read(byte[] dataBuffer, uint numBytesToRead, refuint numBytesRead);

Your guide and assistance will be highly appreciated in this regard.
Best regards.

[willmotil]

ok im not expert on this ,maybe someone here is, i do find it interesting
so in effort to help and looking into it , i did find some interesting examples that use it
even a open source library or example using ftdi stuff

additionally what i think you want to send to be displayed is not the status
(i think that value is more about return codes that describe the data in readData)

ftStatus = myFtdiDevice.Read(readData, numBytesAvailable, ref numBytesRead);
label11.Text =Convert.ToString(ftStatus);

but instead if i understand right it should be something more like

ftStatus = myFtdiDevice.Read(readData, numBytesAvailable, ref numBytesRead);
label11.Text =Convert.ToString(readData); // were readdata actually contains the serial data bytes

either way have a look at the examples below

hopefully some of these links will help

a similar question on stack overflow with a working example
http://stackoverflow.com/questions/1...ead-all-buffer
this above appears to have been using the dll from this FTDI site below but im not sure
http://www.ftdichip.com/Support/Soft...les/CSharp.htm

open source library
a example on git hub open source that reads a ftdi device this is the program source code
https://github.com/DVDPT/DigitalData...ack/Program.cs
this is the full github downloadable / clonable project
https://github.com/DVDPT/DigitalDataLogger