Saya mencoba mengirim dan menerima data melalui komunikasi serial menggunakan program port serial virtual. Tapi ini masalahnya... Misalkan A mengirim data dan B menerima data.
Ketika A mengirim data ke B. B menerima data dua kali (peristiwa serialport_datareceived terjadi dua kali!).
Setiap kali B menutup serialport dan membuka kembali, peristiwa serialport_datareceived terjadi meningkat.
Saya tidak tahu mengapa ini terjadi.
A(transmit)
BaudRate = 9600
Parity = None
DataBits = 8
StopBits = 1
public transmit()
{
InitializeComponent();
foreach (String s in System.IO.Ports.SerialPort.GetPortNames())
{
cBoxPort.Items.Add(s);
}
}
private void CBoxBaudRate_SelectedIndexChanged(object sender, EventArgs e)
{
serialPort1.BaudRate = Convert.ToInt32(cBoxBaudRate.Text);
}
private void CBoxStopBits_SelectedIndexChanged(object sender, EventArgs e)
{
serialPort1.StopBits = (StopBits)Enum.Parse(typeof(StopBits), cBoxStopBit.Text);
}
private void CBoxDataBits_SelectedIndexChanged(object sender, EventArgs e)
{
serialPort1.DataBits = Convert.ToInt32(cBoxDataBits.Text);
}
private void CBoxParityBits_SelectedIndexChanged(object sender, EventArgs e)
{
serialPort1.Parity = (Parity)Enum.Parse(typeof(Parity), cBoxParity.Text);
}
private void btnConnect_Click(object sender, EventArgs e)
{
try
{
serialPort1.PortName = cBoxPort.Text;
serialPort1.BaudRate = Convert.ToInt32(cBoxBaudRate.Text);
serialPort1.DataBits = Convert.ToInt32(cBoxDataBits.Text);
serialPort1.StopBits = (StopBits)Enum.Parse(typeof(StopBits), cBoxStopBit.Text);
serialPort1.Parity = (Parity)Enum.Parse(typeof(Parity), cBoxParity.Text);
serialPort1.DataReceived += new SerialDataReceivedEventHandler(serialPort1_DataReceived);
serialPort1.Open();
txtReceive.AppendText("Connected\n");
btnConnect.Enabled = false;
btnClose.Enabled = true;
btnSend.Enabled = true;
}
catch (Exception ex)
{
return;
}
}
private void btnClose_Click(object sender, EventArgs e)
{
if (serialPort1.IsOpen)
{
serialPort1.Close();
btnClose.Enabled = false;
btnConnect.Enabled = true;
btnSend.Enabled = false;
txtReceive.AppendText("Disconnected\n");
}
}
private void btnSend_Click(object sender, EventArgs e)
{
byte[] bytesend = { 0x00 };
Debug.WriteLine("111");
serialPort1.Write(bytesend, 0, bytesend.Length);
}
private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
Debug.WriteLine("444");
}
}
B (menerima)
byte[] bytesend;
//Initial Conditions(SerialPort)
private void receive_Load(object sender, EventArgs e)
{
cBoxBaudRate.SelectedIndex = 0; //BaudRate = 9600
cBoxParity.SelectedIndex = 0; //Parity = None
cBoxDataBits.SelectedIndex = 0; //DataBits = 8
cBoxStopBit.SelectedIndex = 0; //StopBits = 1
cBoxPort.SelectedIndex = 1;
btnConnect.Enabled = true;
btnClose.Enabled = false;
}
//Show usable CommPort
public receive()
{
InitializeComponent();
foreach (String s in System.IO.Ports.SerialPort.GetPortNames())
{
cBoxPort.Items.Add(s);
}
}
//Connection
private void btnConnect_Click(object sender, EventArgs e)
{
serialPort1.PortName = cBoxPort.Text;
serialPort1.BaudRate = Convert.ToInt32(cBoxBaudRate.Text);
serialPort1.DataBits = Convert.ToInt32(cBoxDataBits.Text);
serialPort1.StopBits = (StopBits)Enum.Parse(typeof(StopBits), cBoxStopBit.Text);
serialPort1.Parity = (Parity)Enum.Parse(typeof(Parity), cBoxParity.Text);
serialPort1.DataReceived += new SerialDataReceivedEventHandler(serialPort1_DataReceived);
serialPort1.Open();
btnConnect.Enabled = false;
btnClose.Enabled = true;
}
private void btnClose_Click(object sender, EventArgs e)
{
if (serialPort1.IsOpen)
{
serialPort1.Close();
btnClose.Enabled = false;
btnConnect.Enabled = true;
}
}
private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
Debug.WriteLine("222");
}
ketika saya men-debug keluaran kode ini mewakili 111 222 222. Dan ketika saya menekan tombol tutup dan sambungkan, keluarannya mewakili 111 222 222 222.