---
tags: Serial Port, C#
---
<!-- 使用黑色主題 -->
{%hackmd BkVfcTxlQ %}
<!-- 決定 CSS 樣板 -->
{%hackmd @aidan/inc_hackmd_css %}

# 在 Console 底下使用 SerialPort(1)
* [GitHub](https://github.com/aidan0328/SerialTool_CSharp.git)
* [Console 底下使用 SerialPort(2)](https://hackmd.io/@aidan/SerialPort-2_Console)

## <span class="Title">主題0. GetPortNames()</span>
### <span class="SubTitle">Lab0-1 取得本機的所有 COM Port 名稱</span>

using System;
using System.IO.Ports;

namespace SerialTool_CSharp {
    class Program {
        static void Main(string[] args) {
            string[] ports = SerialPort.GetPortNames();

            foreach (string p in ports) {
                Console.WriteLine(p);
            }

            Console.WriteLine("Press ENTER to exit.");
            Console.ReadLine();
        }
    }
}

## <span class="Title">主題1. 傳送</span>
### <span class="SubTitle">Lab1-1 傳送字串</span>

using System;
using System.IO.Ports;

namespace SerialTool_CSharp {
    public class Program {
        public static void Main() {
            SerialPort serialPort = new SerialPort("COM3", 115200);
            serialPort.Open();
            serialPort.WriteLine($"From {serialPort.PortName}, Hello");
            serialPort.Close();

            Console.WriteLine("Press ENTER to exit.");
            Console.ReadLine();
        }
    }
}

### <span class="SubTitle">Lab1-2 來探討 static </span>
<font color = "Red">以下程式是無法編譯</font>

using System;
using System.IO.Ports;

namespace SerialTool_CSharp {
    public class Program {
        SerialPort serialPort;
        public static void Main() {
            serialPort = new SerialPort("COM3", 115200);
            serialPort.Open();
            serialPort.WriteLine($"From {serialPort.PortName}, Hello");
            serialPort.Close();

            Console.WriteLine("Press ENTER to exit.");
            Console.ReadLine();
        }
    }
}

### <span class="SubTitle">Lab1-3 傳送 Byte 陣列</span>

using System;
using System.IO.Ports;

namespace SerialTool_CSharp {
    public class Program {
        public static void Main() {
            SerialPort serialPort = new SerialPort("COM3", 115200);
            serialPort.Open();
            Byte[] packet = new Byte[] { 0x30, 0x31, 0x32, 0x33, 0x34 };
            serialPort.Write(packet, 0, packet.Length);
            serialPort.Close();

            Console.WriteLine("Press ENTER to exit.");
            Console.ReadLine();
        }
    }
}

### <span class="SubTitle">Lab1-4 每 500ms 傳送 Byte 陣列</span>

using System;
using System.IO.Ports;

namespace SerialTool_CSharp {
    public class Program {
        public static void Main() {

            SerialPort serialPort = new SerialPort("COM3", 115200);
            serialPort.Open();
            Byte[] packet = new Byte[] { 0x30, 0x31, 0x32, 0x33, 0x34 };
            DateTime dt1 = new DateTime();
            while (true) {
                if (new TimeSpan(DateTime.Now.Ticks - dt1.Ticks).TotalMilliseconds > 500) {
                    dt1 = DateTime.Now;
                    serialPort.Write(packet, 0, packet.Length);
                }
            }
            serialPort.Close();

            Console.WriteLine("Press ENTER to exit.");
            Console.ReadLine();
        }
    }
}

## <span class="Title">主題2. 使用 Thread </span>
### <span class="SubTitle">Lab2-1 導入 Thread()，可以在傳送的時候，輸入 ENTER 來結束程序</span>

using System;
using System.IO.Ports;
using System.Threading;

namespace SerialTool_CSharp {
    public class Program {
        public static void transmitMsg() {
            SerialPort serialPort = new SerialPort("COM3", 115200);
            serialPort.Open();
            Byte[] packet = new Byte[] { 0x30, 0x31, 0x32, 0x33, 0x34 };
            DateTime dt1 = new DateTime();
            Console.Write("Transmitting");
            while (true) {
                if (new TimeSpan(DateTime.Now.Ticks - dt1.Ticks).TotalMilliseconds > 500) {
                    dt1 = DateTime.Now;
                    serialPort.Write(packet, 0, packet.Length);
                    Console.Write(".");
                }
            }
        }

        public static void Main() {
            var t = new Thread(transmitMsg);
            t.Start();

            Console.WriteLine("Press ENTER to exit.");
            Console.ReadLine();
            t.Abort();
        }
    }
}

### <span class="SubTitle">Lab2-2 Thread 開始前，可以指定 packet 內容進行傳送</span>

using System;
using System.IO.Ports;
using System.Threading;

namespace SerialTool_CSharp {
    public class Program {
        public static void transmitMsg() {
            SerialPort serialPort = new SerialPort("COM3", 115200);
            serialPort.Open();
            Byte[] packet = new Byte[] { 0x30, 0x31, 0x32, 0x33, 0x34 };
            DateTime dt1 = new DateTime();
            Console.Write("Transmitting");
            while (true) {
                if (new TimeSpan(DateTime.Now.Ticks - dt1.Ticks).TotalMilliseconds > 500) {
                    dt1 = DateTime.Now;
                    serialPort.Write(packet, 0, packet.Length);
                    Console.Write(".");
                }
            }
        }

        public static void transmitWithMsg(Object msg) {
            SerialPort serialPort = new SerialPort("COM3", 115200);
            serialPort.Open();
            Byte[] packet = (Byte[])msg;
            DateTime dt1 = new DateTime();
            Console.Write("Transmitting");
            while (true) {
                if (new TimeSpan(DateTime.Now.Ticks - dt1.Ticks).TotalMilliseconds > 500) {
                    dt1 = DateTime.Now;
                    serialPort.Write(packet, 0, packet.Length);
                    Console.Write(".");
                }
            }
        }
        public static void Main() {
            var t = new Thread(transmitWithMsg);
            Byte[] packet = new Byte[] { 0x65, 0x66, 0x67, 0x68, 0x69 };
            t.Start(packet);

            Console.WriteLine("Press ENTER to exit.");
            Console.ReadLine();
            t.Abort();
        }
    }
}

## <span class="Title">主題3. 讀取 </span>
### <span class="SubTitle">Lab3-1 讀取字串 </span>

using System;
using System.IO.Ports;

namespace SerialTool_CSharp {
    public class Program {
        public static void Main() {
            SerialPort serialPort = new SerialPort("COM3", 115200);
            serialPort.Open();
            string str = serialPort.ReadLine();
            serialPort.Close();
            Console.WriteLine($"從 {serialPort.PortName} 收到 {str}");

            Console.WriteLine("Press ENTER to exit.");
            Console.ReadLine();
        }
    }
}

### <span class="SubTitle">Lab3-2 讀取 Byte 陣列 </span>

using System;
using System.IO.Ports;

namespace SerialTool_CSharp {
    public class Program {
        public static void Main() {
            SerialPort serialPort = new SerialPort("COM3", 115200);
            serialPort.Open();
            Byte[] packet = new Byte[10];
            int readBytes = serialPort.Read(packet, 0, packet.Length);
            serialPort.Close();
            Console.WriteLine($"從 {serialPort.PortName} 收到");
            for (int i = 0; i < readBytes; i++) {
                Console.Write(String.Format("0x{0:X} ,", packet[i]));
            }
            Console.WriteLine();

            Console.WriteLine("Press ENTER to exit.");
            Console.ReadLine();
        }
    }
}

### <span class="SubTitle">Lab3-3 使用 DataReceived <font color =#ff0>event</font> 讀取 Byte 陣列 </span>
<font color = "Red">以下程式是無法編譯</font>

using System;
using System.IO.Ports;

namespace SerialTool_CSharp {
    public class Program {
        private static void DataReceivedEventHandler(object sender, SerialDataReceivedEventArgs e) {
            SerialPort serialPort = (SerialPort)sender;
            Byte[] packet = new Byte[serialPort.BytesToRead];
            int readBytes = serialPort.Read(packet, 0, packet.Length);

            Console.WriteLine($"從 {serialPort.PortName} 收到");
            for (int i = 0; i < readBytes; i++) {
                Console.Write(String.Format("0x{0:X} ,", packet[i]));
            }
            Console.WriteLine();
        }
        public static void Main() {
            SerialPort serialPort = new SerialPort("COM3", 115200);
            serialPort.DataReceived += DataReceivedEventHandler;
            serialPort.Open();

            Console.WriteLine("Press ENTER to exit.");
            Console.ReadLine();
            serialPort.Close();
        }
    }
}

:::spoiler 補充說明

註冊事件
<span class="Figure">(Fig.3-1)</span>

SerialPort 的 DataReceived 是一個 **SerialDataReceivedEventHandler** 型別的事件
<span class="Figure">(Fig.3-2)</span>

**SerialDataReceivedEventHandler** 是一種 <font color =#ff0>delegate</font> 型別
<span class="Figure">(Fig. 3-3)</span>

:::