WPF 之串口使用

ゞ浴缸里的玫瑰 2023-01-05 12:19 180阅读 0赞

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDYzOTA5NQ_size_16_color_FFFFFF_t_70]

### 布局代码： ###

### 后台代码： ###

private SerialPort Sp = new SerialPort();
    public delegate void HandleInterfaceUpdataDelegate(string text);
    private HandleInterfaceUpdataDelegate interfaceUpdataHandle;
    String[] arr = {  "0", "0", "0", "0" };//用于存储硬件上面灯状态

#### Loaded事件添加用于更改串口参数： ####

//更改参数
    Sp.PortName = "COM3";
    Sp.BaudRate = 115200;
    Sp.Parity = Parity.None;
    Sp.StopBits = StopBits.One;

#### 编写监听和发送数据事件： ####

编写监听和发送数据事件：
    private void Serial()
    { 
        Sp.DataReceived += new SerialDataReceivedEventHandler(Sp_DataReceived);
        if (!Sp.IsOpen)
        { 
            Sp.Open();
        }
        // 用字节的形式发送数据
        SendBytesData(Sp);
    }
    
    //发送二进制数据
    private void SendBytesData(SerialPort Sp)
    { 
        byte[] bytesSend = System.Text.Encoding.Default.GetBytes(txtSend.Text);
        Sp.Write(bytesSend, 0, bytesSend.Length);
    }
    
    public void Sp_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
    { 
        SerialPort serialPort = (SerialPort)(sender);
        System.Threading.Thread.Sleep(100);//延缓一会，用于防止硬件发送速率跟不上缓存数据导致的缓存数据杂乱
        int n = serialPort.BytesToRead;//先记录下来，避免某种原因，人为的原因，操作几次之间时间长，缓存不一致 
        byte[] buf = new byte[n];//声明一个临时数组存储当前来的串口数据 
        //received_count += n;//增加接收计数 
        serialPort.Read(buf, 0, n);//读取缓冲数据 
        //因为要访问ui资源，所以需要使用invoke方式同步ui
        interfaceUpdataHandle = new HandleInterfaceUpdataDelegate(UpdateTextBox);//实例化委托对象
        // Dispatcher.Invoke(interfaceUpdateHandle, new string[] { Encoding.ASCII.GetString(buf) });
        Dispatcher.Invoke(interfaceUpdataHandle, new string[] {  Encoding.ASCII.GetString(buf) });
    }
    
    private void UpdateTextBox(string text)
    { 
       txtReceive.Text = text;
    
       String Receive = Convert.ToString(text);
       if (Receive != "")
       { 
           // MessageBox.Show("receive", Receive);
           String Receive1 = Receive.Substring(0, 1);
           String Receive2 = Receive.Substring(1, 1);
           String Receive3 = Receive.Substring(2, 1);
           String Receive4 = Receive.Substring(3, 1);
           if (Receive1 == 1.ToString())
           { 
               one.Background = new SolidColorBrush(Colors.MediumAquamarine);
               arr[0] = 1.ToString();
           }
           else
           { 
               one.Background = new SolidColorBrush(Colors.Red);
               arr[0] = 0.ToString();
           }
           if (Receive2 == 1.ToString())
           { 
               two.Background = new SolidColorBrush(Colors.MediumAquamarine);
               arr[1] = 1.ToString();
           }
           else
           { 
               two.Background = new SolidColorBrush(Colors.Red);
               arr[1] = 0.ToString();
           }
           if (Receive3 == 1.ToString())
           { 
               three.Background = new SolidColorBrush(Colors.MediumAquamarine);
               arr[2] = 1.ToString();
           }
           else
           { 
               three.Background = new SolidColorBrush(Colors.Red);
               arr[2] = 0.ToString();
           }
           if (Receive4 == 1.ToString())
           { 
               four.Background = new SolidColorBrush(Colors.MediumAquamarine);
               arr[3] = 1.ToString();
           }
           else
           { 
               four.Background = new SolidColorBrush(Colors.Red);
               arr[3] = 0.ToString();
           }
       }
    }

#### button点击事件添加： ####

private void btnSend_Click(object sender, RoutedEventArgs e)
     { 
         if (arr[0] == 0.ToString())
         { 
             txtSend.Text = "0";               
             Serial();
         }
         else
         { 
             txtSend.Text = "1";
             Serial();
         }
     }
    
     private void btnSend1_Click(object sender, RoutedEventArgs e)
     { 
         if (arr[1] == 0.ToString())
         { 
             txtSend.Text = "2";
             Serial();
         }
         else
         { 
             txtSend.Text = "3";
             Serial();
         }
     }
    
     private void btnSend2_Click(object sender, RoutedEventArgs e)
     { 
         if (arr[2] == 0.ToString())
         { 
             txtSend.Text = "4";
             Serial();
         }
         else
         { 
             txtSend.Text = "5";
             Serial();
    
         }
     }
    
     private void btnSend3_Click(object sender, RoutedEventArgs e)
     { 
         if (arr[3] == 0.ToString())
         { 
             txtSend.Text = "6";
             Serial();
         }
         else
         { 
             txtSend.Text = "7";
             Serial();
         }
     }

### 完整后台代码： ###

public partial class MainWindow : Window
        { 
    
            private SerialPort Sp = new SerialPort();
            public delegate void HandleInterfaceUpdataDelegate(string text);
            private HandleInterfaceUpdataDelegate interfaceUpdataHandle;
    
            String[] arr = {  "0", "0", "0", "0" };//用于存储硬件上面灯状态
            public MainWindow()
            { 
                InitializeComponent();
            }
    
            private void Window_Loaded(object sender, RoutedEventArgs e)
            { 
                //更改参数
                Sp.PortName = "COM3";
                Sp.BaudRate = 115200;
                Sp.Parity = Parity.None;
                Sp.StopBits = StopBits.One;
    
                Serial();
            }
    
            private void btnSend_Click(object sender, RoutedEventArgs e)
            { 
                if (arr[0] == 0.ToString())
                { 
                    txtSend.Text = "0";               
                    Serial();
                }
                else
                { 
                    txtSend.Text = "1";
                    Serial();
                }
            }
    
            private void btnSend1_Click(object sender, RoutedEventArgs e)
            { 
                if (arr[1] == 0.ToString())
                { 
                    txtSend.Text = "2";
                    Serial();
                }
                else
                { 
                    txtSend.Text = "3";
                    Serial();
                }
            }
    
            private void btnSend2_Click(object sender, RoutedEventArgs e)
            { 
                if (arr[2] == 0.ToString())
                { 
                    txtSend.Text = "4";
                    Serial();
                }
                else
                { 
                    txtSend.Text = "5";
                    Serial();
    
                }
            }
    
            private void btnSend3_Click(object sender, RoutedEventArgs e)
            { 
                if (arr[3] == 0.ToString())
                { 
                    txtSend.Text = "6";
                    Serial();
                }
                else
                { 
                    txtSend.Text = "7";
                    Serial();
                }
            }
    
            private void Serial()
            { 
                Sp.DataReceived += new SerialDataReceivedEventHandler(Sp_DataReceived);
                if (!Sp.IsOpen)
                { 
                    Sp.Open();
                }
                //用字节的形式发送数据
                SendBytesData(Sp);
            }
    
            //发送二进制数据
            private void SendBytesData(SerialPort Sp)
            { 
    
                byte[] bytesSend = System.Text.Encoding.Default.GetBytes(txtSend.Text);
                Sp.Write(bytesSend, 0, bytesSend.Length);
    
            }
    
            public void Sp_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
            { 
               /* byte[] readBuffer = new byte[Sp.ReadBufferSize]; Sp.Read(readBuffer, 0, readBuffer.Length); //Dispatcher.Invoke(interfaceUpdataHandle, new string[]{ Encoding.UTF8.GetString(readBuffer)}); Dispatcher.Invoke(interfaceUpdataHandle, new string[] { Encoding.ASCII.GetString(readBuffer) }); //Dispatcher.Invoke(interfaceUpdateHandle, new string[] { Encoding.ASCII.GetString(buf) });*/
                SerialPort serialPort = (SerialPort)(sender);
                System.Threading.Thread.Sleep(100);//延缓一会，用于防止硬件发送速率跟不上缓存数据导致的缓存数据杂乱
                int n = serialPort.BytesToRead;//先记录下来，避免某种原因，人为的原因，操作几次之间时间长，缓存不一致 
                byte[] buf = new byte[n];//声明一个临时数组存储当前来的串口数据 
                //received_count += n;//增加接收计数 
                serialPort.Read(buf, 0, n);//读取缓冲数据 
                //因为要访问ui资源，所以需要使用invoke方式同步ui
                interfaceUpdataHandle = new HandleInterfaceUpdataDelegate(UpdateTextBox);//实例化委托对象
                // Dispatcher.Invoke(interfaceUpdateHandle, new string[] { Encoding.ASCII.GetString(buf) });
                Dispatcher.Invoke(interfaceUpdataHandle, new string[] {  Encoding.ASCII.GetString(buf) });
    
                //serialPort.Close();
            }
    
            private void UpdateTextBox(string text)
            { 
                txtReceive.Text = text;
    
                String Receive = Convert.ToString(text);
                if (Receive != "")
                { 
                    // MessageBox.Show("receive", Receive);
                    String Receive1 = Receive.Substring(0, 1);
                    String Receive2 = Receive.Substring(1, 1);
                    String Receive3 = Receive.Substring(2, 1);
                    String Receive4 = Receive.Substring(3, 1);
                    if (Receive1 == 1.ToString())
                    { 
                        one.Background = new SolidColorBrush(Colors.MediumAquamarine);
                        arr[0] = 1.ToString();
                    }
                    else
                    { 
                        one.Background = new SolidColorBrush(Colors.Red);
                        arr[0] = 0.ToString();
                    }
                    if (Receive2 == 1.ToString())
                    { 
                        two.Background = new SolidColorBrush(Colors.MediumAquamarine);
                        arr[1] = 1.ToString();
                    }
                    else
                    { 
                        two.Background = new SolidColorBrush(Colors.Red);
                        arr[1] = 0.ToString();
                    }
                    if (Receive3 == 1.ToString())
                    { 
                        three.Background = new SolidColorBrush(Colors.MediumAquamarine);
                        arr[2] = 1.ToString();
                    }
                    else
                    { 
                        three.Background = new SolidColorBrush(Colors.Red);
                        arr[2] = 0.ToString();
                    }
                    if (Receive4 == 1.ToString())
                    { 
                        four.Background = new SolidColorBrush(Colors.MediumAquamarine);
                        arr[3] = 1.ToString();
                    }
                    else
                    { 
                        four.Background = new SolidColorBrush(Colors.Red);
                        arr[3] = 0.ToString();
                    }
                    //String abc = Convert.ToString(arr);
                    //MessageBox.Show("abc", abc);
    
                    // MessageBox.Show("arr", arr);
                }
            }
        }

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDYzOTA5NQ_size_16_color_FFFFFF_t_70]: /images/20221119/3a4e2e351b334374b1187a09a153b636.png