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Reading byte from serial ports

Discussion in 'C#' started by firstoption, Jun 8, 2014.

  1. firstoption

    firstoption New Member

    Apr 1, 2014
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    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

    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.

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