好的，所以我正在嘗試從 C# 到 Arduino（使用 FTDI232）進行雙向通信，反之亦然，從 Arduino 到 C#。這是代碼：
public partial class Form1 : Form
{
public SerialPort myPort;
private DateTime dateTime;
private string inData;
const string com = "COM8";
public Form1()
{
InitializeComponent();
}
private void start_btn_Click(object sender, EventArgs e) // TURN ON LED
{
myPort = new SerialPort();
myPort.BaudRate = 9600;
myPort.PortName = com;
try
{
myPort.Open();
myPort.WriteLine("A");
myPort.Close();
error_tb.Text = "";
}
catch (Exception exc)
{
MessageBox.Show(exc.Message, "Errore");
}
}
private void stop_btn_Click(object sender, EventArgs e) // TURN OFF LED
{
myPort = new SerialPort();
myPort.BaudRate = 9600;
myPort.PortName = com;
try
{
myPort.Open();
myPort.WriteLine("B");
myPort.Close();
error_tb.Text = "";
}
catch (Exception exc2)
{
MessageBox.Show(exc2.Message, "Error");
}
}
void MyPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
inData = myPort.ReadLine();
this.Invoke(new EventHandler(displayData_event));
}
private void displayData_event(object sender, EventArgs e)
{
dateTime = DateTime.Now;
string time = dateTime.Hour ":" dateTime.Minute ":" dateTime.Second;
values_tb.Text = time "\t\t\t\t\t" inData;
}
private void Form1_Load(object sender, EventArgs e) // PRESS PHYSICAL BUTTON TO SEND DATA
{
myPort = new SerialPort();
myPort.BaudRate = 9600;
myPort.PortName = com;
myPort.Parity = Parity.None;
myPort.DataBits = 8;
myPort.StopBits = StopBits.One;
myPort.DataReceived = MyPort_DataReceived;
try
{
myPort.Open();
values_tb.Text = "";
}
catch (Exception exc3)
{
MessageBox.Show(exc3.Message, "Error");
}
}
private void exit_btn_Click(object sender, EventArgs e) // Exit from Application
{
Application.Exit();
}
private void button2_Click(object sender, EventArgs e)
{
try
{
myPort.Close();
}
catch (Exception exc4)
{
MessageBox.Show(exc4.Message, "Error");
}
}
}
我有三個問題。一種是當我想關閉應用程式時，我想關閉串行通信，因為我使用 Form1_Load 讓它自動打開，一旦你開始除錯，它也打開了串行通信，它保持打開狀態，但我沒有不想使用我必須先單擊才能關閉應用程式的按鈕。關閉應用程式后，我需要自動關閉串行通信。
第二個問題是拒絕通信的串行埠，我的意思是我需要從接收資料切換到發送資料。這是它的外觀圖片：應用程式影像
第三個問題是 LED 問題。嗯，它類似于第二個，但這次當我單擊按鈕關閉時，我希望它切換回接收資料。圖片如下： 應用程式影像 2
編輯：此代碼只是臨時的。我需要它來關閉串行通信
private void button2_Click(object sender, EventArgs e)
{
try
{
myPort.Close();
}
catch (Exception exc4)
{
MessageBox.Show(exc4.Message, "Error");
}
}
uj5u.com熱心網友回復：
您正在多次初始化和打開埠。這是不允許的。使用單個初始化并保留成員。這也使代碼更加流暢。
public partial class Form1 : Form
{
public SerialPort myPort;
private DateTime dateTime;
const string com = "COM8";
public Form1()
{
InitializeComponent();
}
private void start_btn_Click(object sender, EventArgs e) // TURN ON LED
{
try
{
myPort.WriteLine("A");
error_tb.Text = "";
}
catch (Exception exc)
{
MessageBox.Show(exc.Message, "Errore");
}
}
private void stop_btn_Click(object sender, EventArgs e) // TURN OFF LED
{
try
{
myPort.WriteLine("B");
error_tb.Text = "";
}
catch (Exception exc2)
{
MessageBox.Show(exc2.Message, "Error");
}
}
void MyPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
var inData = myPort.ReadLine(); // Use local variable
displayData_event(inData);
}
private void displayData_event(string data)
{
dateTime = DateTime.Now;
string time = dateTime.Hour ":" dateTime.Minute ":" dateTime.Second;
values_tb.Text = time "\t\t\t\t\t" data;
}
private void Form1_Load(object sender, EventArgs e) // PRESS PHYSICAL BUTTON TO SEND DATA
{
myPort = new SerialPort();
myPort.BaudRate = 9600;
myPort.PortName = com;
myPort.Parity = Parity.None;
myPort.DataBits = 8;
myPort.StopBits = StopBits.One;
myPort.DataReceived = MyPort_DataReceived;
try
{
myPort.Open();
values_tb.Text = "";
}
catch (Exception exc3)
{
MessageBox.Show(exc3.Message, "Error");
}
}
private void exit_btn_Click(object sender, EventArgs e) // Exit from Application
{
Application.Exit();
}
private void button2_Click(object sender, EventArgs e)
{
try
{
myPort.Close();
myPort = null;
}
catch (Exception exc4)
{
MessageBox.Show(exc4.Message, "Error");
}
}
}
我想我也修復了你的事件處理。一個獲取資料然后轉發接收到的文本的處理程式就足夠了。您現在也不會真正需要例外處理WriteLine，因為這不會真正失敗。
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