TProPCMonitor/LoraGamepad/Models/SerialBase.cs

using System;
using System.Collections.Generic;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Text;


namespace Autolabor
{

[StructLayout(LayoutKind.Sequential)]
    public struct SerialDevice
    {
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)] 
        public string port;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)] 
        public string description;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)] 
        public string hardware_id;
        public UInt16 vid;
        public UInt16 pid;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)] 
        public string serial_num;
        
    }
    public class SerialBaseException : Exception
    {
        public SerialBaseException(string message)
        :base(message)
        {
          
        }
    }
    
    public class SerialBase
    {
        public static IntPtr DllImportResolver(string libraryName, Assembly assembly, DllImportSearchPath? searchPath)
        {
            
            if (libraryName == "serial_base")
            {

                if (System.Runtime.InteropServices.RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
                {
                    if (System.Runtime.InteropServices.RuntimeInformation.ProcessArchitecture == Architecture.Arm64)
                    {
                        
                        return NativeLibrary.Load("libserial_base-mac-arm64.dylib", assembly, searchPath);

                    }
                    else
                    {
                        return NativeLibrary.Load("libserial_base-mac.dylib", assembly, searchPath);
                    }

                }
                else if (System.Runtime.InteropServices.RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
                {
                    if (System.Runtime.InteropServices.RuntimeInformation.ProcessArchitecture == Architecture.Arm64)
                    {
                        return NativeLibrary.Load("libserial_base-linux-arm64.so", assembly, searchPath);
                    }
                    else
                    {
                        return NativeLibrary.Load("libserial_base-linux.so", assembly, searchPath);
                    }

                }
                else if (System.Runtime.InteropServices.RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
                {
                    if (System.Runtime.InteropServices.RuntimeInformation.ProcessArchitecture == Architecture.Arm64)
                    {
                        return IntPtr.Zero;
                    }
                    else
                    {
                        return NativeLibrary.Load("serial_base-win.dll", assembly, searchPath);
                    }

                }

            }
            return IntPtr.Zero;
        }

        [DllImport("serial_base", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        private static extern bool al_serial_enumerate_ports(IntPtr excep,IntPtr[] portlist ,ref int portsize);
        
        
        [DllImport("serial_base",CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        private static extern bool al_serial_create(IntPtr excep,ref IntPtr serial,string port, int baudrate, int timeout);
        
        [DllImport("serial_base", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        private static extern bool al_serial_open(IntPtr excep,IntPtr serial);
        
        [DllImport("serial_base", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        private static extern bool al_serial_close(IntPtr excep,IntPtr serial);

        [DllImport("serial_base",CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        private static extern bool al_serial_is_open(IntPtr excep,IntPtr serial,ref bool opened);

        [DllImport("serial_base",CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        private static extern bool al_serial_write(IntPtr excep,IntPtr serial, IntPtr data,int size);

        [DllImport("serial_base",CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        
        private static extern bool al_serial_available(IntPtr excep,IntPtr serial, ref int avaiable_size);
        
        [DllImport("serial_base",CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        private static extern bool al_serial_read(IntPtr excep,IntPtr serial, int buffer_size,IntPtr data,ref int recev_size);
        
        [DllImport("serial_base",CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        private static extern bool al_serial_readline(IntPtr excep,IntPtr serial, StringBuilder data,ref int recev_size);
        
        [DllImport("serial_base", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        private static extern bool al_serial_delete(IntPtr excep,ref IntPtr serial);

        
        private IntPtr _serialPtr;
        
        public string Port=string.Empty;

        public int Baudrate = 0;

        public int ReadTimeout = 80;
        
        
        private const int PortInfoBufferSize = 32;
        private const int ReadBufferSize = 64;
        private const int WriteBufferSize = 1024;
        private const int ExceptionBufferSize = 256; //固定尺寸，不能修改
        
        private IntPtr _readBuffer;
        private IntPtr _writeBuffer;
        private IntPtr _exceptionBuffer;
        
        private static bool dynamicLibLoaded = false;
        
        public SerialBase()
        {
            _serialPtr=IntPtr.Zero;
            _readBuffer = Marshal.AllocHGlobal(ReadBufferSize);
            _writeBuffer = Marshal.AllocHGlobal(WriteBufferSize);
            _exceptionBuffer = Marshal.AllocHGlobal(ExceptionBufferSize);

            if (dynamicLibLoaded == false)
            {
                NativeLibrary.SetDllImportResolver(Assembly.GetExecutingAssembly(), SerialBase.DllImportResolver);

                dynamicLibLoaded = true;
                
            }
        }

        public static  List<SerialDevice>  EnumeratePorts()
        {
            if (dynamicLibLoaded == false)
            {
                NativeLibrary.SetDllImportResolver(Assembly.GetExecutingAssembly(), SerialBase.DllImportResolver);
                
                dynamicLibLoaded = true;
            }
            
            
            IntPtr[] portinfoPtrs = new IntPtr[PortInfoBufferSize];
            
            IntPtr _tmpExceptionBuffer = Marshal.AllocHGlobal(ExceptionBufferSize);
            
            List<SerialDevice> result = new List<SerialDevice>();

            int copySize = 0;
            
            for (int i = 0; i < PortInfoBufferSize; i++)
            {
                portinfoPtrs[i] = Marshal.AllocHGlobal(Marshal.SizeOf<SerialDevice>());

            }
            
            
            bool success = al_serial_enumerate_ports(_tmpExceptionBuffer, portinfoPtrs, ref copySize);
            
            if (success == false)
            {
                for (int i = 0; i < PortInfoBufferSize; i++)
                {
                    Marshal.FreeHGlobal(portinfoPtrs[i]);
                }
                
                throw new SerialBaseException(_tmpExceptionBuffer.ToString());
            }

            for (int i = 0; i < copySize; i++)
            {

                result.Add(Marshal.PtrToStructure<SerialDevice>(portinfoPtrs[i]));
                
            }
            
            for (int i = 0; i < PortInfoBufferSize; i++)
            {
                Marshal.FreeHGlobal(portinfoPtrs[i]);
            }
            
            Marshal.FreeHGlobal(_tmpExceptionBuffer);
            return result;
        }

        
        public void Open()
        {
      
            if (_serialPtr == IntPtr.Zero)
            {

                if (al_serial_create(_exceptionBuffer, ref _serialPtr, Port, Baudrate, ReadTimeout) == false) {

                    throw new SerialBaseException(_exceptionBuffer.ToString());
                  
                }
            }
            else
            {
                if (al_serial_open(_exceptionBuffer,_serialPtr) == false)
                {
                    throw new SerialBaseException(_exceptionBuffer.ToString());
                }
                
            }
            
        }
        
        public void Close()
        {
            

            if (_serialPtr == IntPtr.Zero)
            {
                return;
            }
            else
            {
             
                if (al_serial_close(_exceptionBuffer,_serialPtr) == false)
                {
                    throw new SerialBaseException(_exceptionBuffer.ToString());
                }
                
                
            }
            
        }
        

        public bool IsOpen()
        {
            
            
            if (_serialPtr == IntPtr.Zero)
            {
                return false;
            }
            
            bool opened = false;
            

            if (al_serial_is_open(_exceptionBuffer, _serialPtr,ref opened) == false)
            {
                throw new SerialBaseException(_exceptionBuffer.ToString());
            }

            return opened;
            
        }

        public void Write(byte[] data)
        {

            if (_serialPtr == IntPtr.Zero)
            {
                throw new SerialBaseException("Serial is not open.");  
            }

            int sendCount = 0;

            // 分批发送数据
            while (sendCount < data.Length) {

                int needSend = (data.Length - sendCount) >= WriteBufferSize
                    ? WriteBufferSize
                    : (data.Length - sendCount);
                
                Marshal.Copy(data,sendCount,_writeBuffer, needSend);

                if (al_serial_write(_exceptionBuffer, _serialPtr, _writeBuffer,needSend) == false)
                {
                    
                    throw new SerialBaseException(_exceptionBuffer.ToString());
                }
                
                sendCount += needSend;
              
            }
            
        }
        
        public byte[] Read()
        {
          
            
            if (_serialPtr == IntPtr.Zero)
            {
                throw new SerialBaseException("Serial is not open.");  
            }
            
         
            int recvSize = 0;
            
            if (al_serial_read(_exceptionBuffer, _serialPtr,ReadBufferSize, _readBuffer,ref recvSize) == false)
            {
                throw new SerialBaseException(_exceptionBuffer.ToString());
            }

         
            Byte[] recvData = new byte[recvSize];
            
            Marshal.Copy(_readBuffer, recvData, 0, recvSize);

            return recvData;

        }
        
        
        
        

        ~SerialBase() {
            al_serial_delete(_exceptionBuffer, ref _serialPtr);
            _serialPtr=IntPtr.Zero;
            Marshal.FreeHGlobal(_readBuffer);
            Marshal.FreeHGlobal(_writeBuffer);
            Marshal.FreeHGlobal(_exceptionBuffer);

        }
    }
}