Question

大家好我对C＃和Arduino都很陌生。当我向我的Arduino发送文本时，它不会将其发送回应用程序中的文本框。我可以将它发送到我的Arduino但是当我发送的消息必须在应用程序的文本框中时我收到错误。

以下是我收到错误的部分：

private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)
{   
    Output.Text = serialPort1.ReadExisting();
}

这是我的代码：

public partial class ArduinoSerial : Form
{
    public ArduinoSerial()
    {
        InitializeComponent();
        string[] serialPorts = System.IO.Ports.SerialPort.GetPortNames();
        cboPorts.Items.AddRange(serialPorts);
        cboBaud.Items.Add(2400);
        cboBaud.Items.Add(4800);
        cboBaud.Items.Add(9600);
        cboBaud.Items.Add(14400);
        cboBaud.Items.Add(19200);
        cboBaud.Items.Add(28800);
        cboBaud.Items.Add(38400);
        cboBaud.Items.Add(57600);
        cboBaud.Items.Add(115200);
        cboPorts.SelectedIndex = 0;
        cboBaud.SelectedIndex = 2;
    }

    private void cboPorts_SelectedIndexChanged(object sender, EventArgs e)
    {
        string[] serialPorts = System.IO.Ports.SerialPort.GetPortNames();
        cboPorts.Items.AddRange(serialPorts);
    }

    private void cboBaud_SelectedIndexChanged(object sender, EventArgs e)
    {
        cboBaud.Items.Add(2400);
        cboBaud.Items.Add(4800);
        cboBaud.Items.Add(9600);
        cboBaud.Items.Add(14400);
        cboBaud.Items.Add(19200);
        cboBaud.Items.Add(28800);
        cboBaud.Items.Add(38400);
        cboBaud.Items.Add(57600);
        cboBaud.Items.Add(115200);
    }

    private void btnStart_Click(object sender, EventArgs e)
    {
        serialPort1.PortName = cboPorts.SelectedItem.ToString();
        serialPort1.BaudRate = Convert.ToInt32(cboBaud.SelectedItem.ToString());

        if (!serialPort1.IsOpen)
        {
            btnStart.Enabled = false;
            btnStop.Enabled = true;
            serialPort1.Open();
        }
    }

    private void btnStop_Click(object sender, EventArgs e)
    {
        if (serialPort1.IsOpen)
        {
            btnStart.Enabled = true;
            btnStop.Enabled = false;
            serialPort1.Close();
        }
    }

    private void btnSend_Click(object sender, EventArgs e)
    {
        if (!serialPort1.IsOpen) return;

        serialPort1.Write(txtInput.Text + "\n");
    }

    private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)
    {   
        Output.Text = serialPort1.ReadExisting();
    }
}

我的ino文件

/*
 Name:      LOOP_C.ino
 Created:   9/8/2017 10:51:31 AM
 Author:    Jari
*/

// the setup function runs once when you press reset or power the board
void setup() {
    Serial.begin(9600);
}

// the loop function runs over and over again until power down or reset
void loop() {
    while (Serial.available()) {
        Serial.write(Serial.read());
    }
}

我已经尝试了2个多小时，我无法在任何地方找到答案。

Answer 1

如果遇到CrossThreadException，请尝试此操作：

            private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
            {   
                SetText(serialPort1.ReadExisting());
            }

            private void SetText(string text)
            {
                if (Output.InvokeRequired)
                {   
                    SetTextCallback d = new SetTextCallback(SetText);
                    this.Invoke(d, new object[] { text });
                }
                else
                {
                    Output.Text = text;
                }
            }

我这里没有编译器，所以也许你需要修复一些东西。如果是的话 - 抱歉

C＃串口在文本框中不显示输出

1 个答案: