Question

我已经制作了一个Windows窗体应用程序，我想以这种形式向Pro Micro读取和写入串行数据。
将数据发送到µC可以正常工作，但我无法读取它。
甚至，µC不会发送数据。

现在，我删除了所有不必要的代码，µC应该只是回显我发送的内容。
当我在Arduino串行监视器中使用此命令时，它都可以正常工作，然后写入数据并返回它。但是当在Windows窗体中尝试时，它却没有。
然后我决定测量µC的tx引脚，尽管接收到的数据是正确的，但它根本不发送任何数据。
脉冲长度有所不同，但我认为这还不足以引起这种情况，该形式的持续时间为0.1039ms（使频率为9.624 Hz），而Arduino监视器的持续时间为0.1041ms（使频率为9.606） Hz）。

这是我的代码：

Form1：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO.Ports;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace UART
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

            this.TopMost = true;    // Window always on top
            this.AutoSize = true;   // The size of the window will always be as small as possible while still showing all content
            serial.DataReceived += new SerialDataReceivedEventHandler(mySerialPort_DataReceived);
            lblInvalidPort.Hide();
            tbWriteInput.Enabled = false;
            btnSend.Enabled = false;

            // Show all ports in the ports combobox and sellect the curently used option
            combPort.Items.Clear();
            combPort.Items.AddRange(SerialPort.GetPortNames());
            combPort.SelectedItem = serial.PortName;
        }

        private void serial_ErrorReceived(object sender, SerialErrorReceivedEventArgs e)
        {
            rtbRead.Text = e.ToString() + "\n" + rtbRead.Text;
            MessageBox.Show(e.ToString(), "Error", MessageBoxButtons.OK, MessageBoxIcon.Warning);
        }

        private void combPort_Click(object sender, EventArgs e)
        {
            // Show all ports in the ports combobox and sellect the curently used option
            combPort.Items.Clear();
            combPort.Items.AddRange(SerialPort.GetPortNames());
        }

        private void btnConnect_Click(object sender, EventArgs e)
        {
            if (btnConnect.Text.ToLower().Equals("connect"))
            {
                try
                {
                    serial.PortName = combPort.Text;
                    serial.BaudRate = 9600;
                    serial.Open();
                    lblInvalidPort.Hide();
                    tbWriteInput.Enabled = true;
                    btnSend.Enabled = true;
                    btnConnect.Text = "Disconnect";
                }
                catch (Exception err)
                {
                    lblInvalidPort.Show();
                    MessageBox.Show(err.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                    tbWriteInput.Enabled = false;
                    btnSend.Enabled = false;
                }
            }

            else if (btnConnect.Text.ToLower().Equals("disconnect"))
            {
                serial.Close();
                tbWriteInput.Enabled = false;
                btnSend.Enabled = false;
                btnConnect.Text = "Connect";
            }
        }

        private void serial_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            MessageBox.Show("Got some data", "Serial", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            rtbRead.Text = serial.ReadExisting() + "\n" + rtbRead.Text;
        }

        private static void mySerialPort_DataReceived(
                   object sender,
                   SerialDataReceivedEventArgs e)
        {
            SerialPort sp = (SerialPort)sender;
            string indata = sp.ReadExisting();
            MessageBox.Show("Got some data", "Serial", MessageBoxButtons.OK, MessageBoxIcon.Warning);
        }

        private void tbWriteInput_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter || e.KeyCode == Keys.Tab)
            {
                rtbWrite.Text = tbWriteInput.Text + "\n" + rtbWrite.Text;
                serial.Write(tbWriteInput.Text);
            }
        }

        private void btnSend_Click(object sender, EventArgs e)
        {
            rtbWrite.Text = tbWriteInput.Text + "\n" + rtbWrite.Text;
            serial.Write(tbWriteInput.Text);
        }
    }
}

Arduino：

void setup() {
    Serial.begin(9600);
}

void loop() {
    while(Serial.available() == 0);
    while(Serial.available() > 0) Serial.write(Serial.read());
}

Answer 1

对不起，我在使用第三版时发现了问题，您需要添加serial.DtrEnable = true;才能将其插入单词。

我可以将数据发送到Arduino，但无法从其中接收数据

1 个答案: