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Reader.cs
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Reader.cs
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using System;
using System.IO.Ports;
using System.Threading;
using System.Windows;
namespace TouchScreenApp
{
public class Reader
{
private readonly SerialPort _serialPort;
private Thread _readerThread;
private readonly byte[] _buffer = new byte[8];
private bool _running = false;
public event EventHandler<TouchEventArgs> Touched;
public Reader(string portName, int baudRate, bool dtrEnable, bool rtsEnable)
{
_serialPort = new SerialPort
{
PortName = portName,
BaudRate = baudRate,
DataBits = 8,
Parity = Parity.None,
StopBits = StopBits.One,
DtrEnable = dtrEnable,
RtsEnable = rtsEnable
};
}
private void Read()
{
try
{
while (_running)
{
if (_serialPort.BytesToRead <= 0)
{
Thread.Sleep(1);
continue;
}
_serialPort.ReadTo("\x55\x54");
_buffer[0] = (byte) _serialPort.ReadByte();
_buffer[1] = (byte) _serialPort.ReadByte();
_buffer[2] = (byte) _serialPort.ReadByte();
_buffer[3] = (byte) _serialPort.ReadByte();
_buffer[4] = (byte) _serialPort.ReadByte();
_buffer[5] = (byte) _serialPort.ReadByte();
_buffer[6] = (byte) _serialPort.ReadByte();
_buffer[7] = (byte) _serialPort.ReadByte();
var touch = Touch.Create(_buffer);
if (touch != null)
{
OnTouched(new TouchEventArgs {Touch = touch});
}
}
}
catch (InvalidOperationException e)
{
Stop();
MessageBox.Show($"Проблема с COM портом, остановите программу проверьте порт и запустите снова.\n{e.Message}");
}
catch (Exception e)
{
Stop();
MessageBox.Show($"Неизвестная ошибка. Сфотографируйте данную ошибку, остановите программу и запустите снова.\n" +
$"Полученный пакет: {_buffer[0]} {_buffer[1]} {_buffer[2]} {_buffer[3]} {_buffer[4]} {_buffer[5]} {_buffer[6]} {_buffer[7]}\n" +
$"Ошибка: {e.Message}");
}
}
public void Start()
{
_readerThread = new Thread(Read) {IsBackground = true};
if (_running) return;
_serialPort.Open();
_running = true;
_readerThread.Start();
}
public void Stop()
{
try
{
_running = false;
_serialPort.Close();
}
catch (Exception ignored)
{
// ignored
}
}
public class TouchEventArgs : EventArgs
{
public Touch Touch { get; set; }
}
protected virtual void OnTouched(TouchEventArgs e)
{
Touched?.Invoke(this, e);
}
}
}