[转][SerialPort]测试用例

private void Form1_Load(object sender, EventArgs e)
{
    var s = SerialPort.GetPortNames().OrderBy(r => r);
    foreach (var item in s)
    {
        comCOM.Items.Add(item);
    }
    if (comCOM.Items.Count > 0)
        comCOM.SelectedIndex = 0;

    var rates = new object[] { 9600, 12800, 14400, 19200, 1200, 2400, 4800 };
    comBaudRate.Items.AddRange(rates);
    comBaudRate.SelectedIndex = 0;

    txtDataBits.Text = "8";

    var paritys = Enum.GetNames(typeof(Parity));
    comParity.Items.AddRange(paritys);
    comParity.SelectedIndex = 0;

    var stops = Enum.GetNames(typeof(StopBits));
    comStopBits.Items.AddRange(stops);
    comStopBits.SelectedIndex = 1;
}

private void btnOpen_Click(object sender, EventArgs e)
{
    ClostCom();
    toolInfo.Text = string.Empty;
    try
    {
        serialPort1.PortName = comCOM.Text;
        serialPort1.BaudRate = Math.Max(2400, ConvertHelper.ToInt(comBaudRate.Text));
        serialPort1.DataBits = Math.Max(1, ConvertHelper.ToInt(txtDataBits.Text));
        serialPort1.Parity = (Parity)Enum.Parse(typeof(Parity), comParity.Text);
        serialPort1.StopBits = (StopBits)Enum.Parse(typeof(StopBits), comStopBits.Text);
        serialPort1.Open();
        toolComState.BackColor = Color.Green;
        txtInfo.Text = DateTime.Now.ToString("HH:mm") + " 打开串口成功！\r\n";
    }
    catch (Exception ex)
    {
        toolInfo.Text = "打开串口失败！";
        txtInfo.Text = DateTime.Now.ToString("HH:mm") + " 打开串口失败：" + ex.Message + "\r\n";
    }
}

private void ClostCom()
{
    try
    {
        serialPort1.Close();
        toolComState.BackColor = SystemColors.Control;
    }
    catch { }
}

private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
    Thread.Sleep(50);
    byte[] buffer = new byte[serialPort1.ReadBufferSize];
    int len = serialPort1.Read(buffer, 0, buffer.Length);

    Invoke((MethodInvoker)delegate
    {
        toolInfo.Text = string.Empty;
        if (txtInfo.Lines.Length > 5000)
            txtInfo.Text = string.Format("{0} {1} 接收到：{2}", DateTime.Now.ToString("HH:mm"), serialPort1.PortName, GetByte(buffer, len));
        else
        {
            var s = txtInfo.Text;
            txtInfo.Text = string.Format("{0} {1} 接收到：{2}\r\n{3}", DateTime.Now.ToString("HH:mm"), serialPort1.PortName, GetByte(buffer, len), s);
        }
    });
}

private string GetByte(byte[] buffer, int len)
{
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < len; i++)
    {
        var item = buffer[i];
        sb.Append(item.ToString("x2") + " ");
    }
    sb.AppendLine();
    sb.Append(Encoding.Default.GetString(buffer));
    sb.AppendLine();
    return sb.ToString();
}

有个 BUG：文本框始终只有一行内容。

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