使用C#实现多串口管理

在C#中，可以使用SerialPort类来实现对串口的管理。以下是一个简单的多串口管理的示例代码：

using System;
using System.IO.Ports;

namespace MultiSerialPort
{
    public class SerialPortManager
    {
        private SerialPort[] _serialPorts;

        public SerialPortManager(int portCount)
        {
            _serialPorts = new SerialPort[portCount];
            for (int i = 0; i < portCount; i++)
            {
                _serialPorts[i] = new SerialPort();
            }
        }

        public void Open(int portIndex, string portName, int baudRate)
        {
            if (portIndex >= _serialPorts.Length)
            {
                throw new ArgumentOutOfRangeException(nameof(portIndex));
            }

            var port = _serialPorts[portIndex];
            port.PortName = portName;
            port.BaudRate = baudRate;
            port.Open();
        }

        public void Close(int portIndex)
        {
            if (portIndex >= _serialPorts.Length)
            {
                throw new ArgumentOutOfRangeException(nameof(portIndex));
            }

            var port = _serialPorts[portIndex];
            if (port.IsOpen)
            {
                port.Close();
            }
        }

        public void Write(int portIndex, byte[] buffer, int offset, int count)
        {
            if (portIndex >= _serialPorts.Length)
            {
                throw new ArgumentOutOfRangeException(nameof(portIndex));
            }

            var port = _serialPorts[portIndex];
            if (port.IsOpen)
            {
                port.Write(buffer, offset, count);
            }
        }

        public int Read(int portIndex, byte[] buffer, int offset, int count)
        {
            if (portIndex >= _serialPorts.Length)
            {
                throw new ArgumentOutOfRangeException(nameof(portIndex));
            }

            var port = _serialPorts[portIndex];
            if (port.IsOpen)
            {
                return port.Read(buffer, offset, count);
            }

            return 0;
        }
    }
}

使用示例：

var manager = new SerialPortManager(2);

// 打开第一个串口
manager.Open(0, "COM1", 9600);

// 打开第二个串口
manager.Open(1, "COM2", 9600);

// 向第一个串口写入数据
byte[] data = new byte[] { 0x01, 0x02, 0x03 };
manager.Write(0, data, 0, data.Length);

// 从第二个串口读取数据
byte[] buffer = new byte[1024];
int bytesRead = manager.Read(1, buffer, 0, buffer.Length);