Hatteland Display HT B22 (Fanless) - Manual (Page 59)

59
API / VCOM Commands
Appendix
IND100077-132
Basic Example for setting Half/Full Duplex Mode
Example using Microsoft® Visual Studio 2012, C# style.
Note, COM7 has been used as port ID. It may differ depending on your system installation. In any case, simply write
COM x (where x is the number defined by the Operating System automatically) for Virtual COM Port.
using System.IO.Ports;
namespace CS100031_1_VCOM_Example
{
public partial class Form1 : Form
{
private SerialPort serialPort;
public Form1()
{
InitializeComponent();
OpenComPort();
//Opens COM port with Baudrate 9600.
}
public void OpenComPort()
{
serialPort =
new SerialPort (“ COM7 ”, 9600, Parity .None, 8, StopBits .One);
serialPort. Handshake = Handshake.None;
serialPort.Open();
}
private void btnQDUHalf_Click( object sender, EventArgs e) //Set Half Duplex
{
byte [] message = new byte [9] { 0x07, 0xFF, 0x51, 0x44, 0x55, 0x01, 0x0E, 0x00, 0xFF };
serialPort.Write(message, 0, message.Length);
}
private void btnQDUFull_Click( object sender, EventArgs e) //Set Full Duplex
{
byte [] message = new byte [9] { 0x07, 0xFF, 0x51, 0x44, 0x55, 0x01, 0x0E, 0xFF, 0x00 };
serialPort.Write(message, 0, message.Length);
}
}
}
Visual Example: