c# - 我可以向 Arduino 发送数据，但无法从它接收数据

问题描述

我制作了一个 Windows 窗体应用程序，我想以这种形式读取串行数据并将其写入我的 Pro Micro。
将数据发送到 µC 可以正常工作，但我无法从中读取。
更重要的是，µC 不发送数据。

现在我删除了所有不必要的代码，µC 应该只是回应我发送的内容。
当我在 Arduino 串行监视器中使用它时，它一切正常，我写入数据并返回它。
但是当在 windows 窗体中尝试这个时，它不会。
然后我决定测量 µC 的 tx 引脚，它根本没有发送任何数据，尽管接收到的数据是正确的。
脉冲长度存在差异，但我认为这不足以导致这种情况，表格的持续时间为 0.1039 毫秒（频率为 9.624 赫兹），而 Arduino 监视器的持续时间为 0.1041 毫秒（频率为 9.606赫兹）。

这是我的代码：

表格1：

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);
        }
    }
}

阿杜诺：

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

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

标签： c#visual-studio-2015arduinoserial-port

c# - 我可以向 Arduino 发送数据，但无法从它接收数据

问题描述

解决方案

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