Created
January 26, 2020 06:42
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Serial port class for Unity on Linux
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| using System; | |
| using System.Collections.Generic; | |
| using System.Runtime.InteropServices; | |
| using System.Linq; | |
| class SerialPort : IDisposable | |
| { | |
| [DllImport("libc.so.6", EntryPoint="open")] | |
| private static extern int Open(string path, int mode); | |
| [DllImport("libc.so.6", EntryPoint="close")] | |
| private static extern int Close(int fd); | |
| [DllImport("libc.so.6", EntryPoint="ioctl")] | |
| private static extern int Ioctl(int fd, int request, int data); | |
| [DllImport("libc.so.6", EntryPoint="read")] | |
| private static extern int Read(int fd, byte[] data, int length); | |
| [DllImport("libc.so.6", EntryPoint="write")] | |
| private static extern int Write(int fd, byte[] data, int length); | |
| private const int OPEN_READ_WRITE = 2; | |
| public string Port {get; set;} | |
| public int BaudRate {get; set;} | |
| public bool IsOpen => this.fd != 0; | |
| private int fd; | |
| public SerialPort(string port, int baudRate) | |
| { | |
| this.Port = port; | |
| this.BaudRate = baudRate; | |
| } | |
| public void Open() | |
| { | |
| this.fd = Open(this.Port, OPEN_READ_WRITE); | |
| } | |
| public void Close() | |
| { | |
| if( this.fd != 0 ) | |
| { | |
| Close(this.fd); | |
| } | |
| } | |
| public void Write(string message) | |
| { | |
| var decoded = System.Text.UTF8Encoding.UTF8.GetBytes(message); | |
| Write(this.fd, decoded, decoded.Length); | |
| } | |
| public string ReadLine() | |
| { | |
| var buffer = new List<byte>(); | |
| var charBuffer = new byte[1]; | |
| for(;;) | |
| { | |
| if( Read(this.fd, charBuffer, 1) > 0 ) { | |
| if( charBuffer[0] == 10 ) { | |
| break; | |
| } | |
| else { | |
| buffer.Add(charBuffer[0]); | |
| } | |
| } | |
| } | |
| return System.Text.UTF8Encoding.UTF8.GetString(buffer.ToArray()); | |
| } | |
| public void Dispose() | |
| { | |
| this.Close(); | |
| } | |
| } |
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