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154 lines
4.0 KiB
154 lines
4.0 KiB
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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namespace HidLibrary.Honeywell1902Series
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{
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public class Scanner1902 : IDisposable
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{
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private const int HidReportId = 0x4;
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private const int ErrorBeepMessage = 0x20;
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private const int SuccessBeepMessage = 0x40;
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private const int StartScanMessage = 0x4;
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private const int EndScanMessage = 0x1;
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public event InsertedEventHandler Inserted;
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public event RemovedEventHandler Removed;
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public event DataRecievedEventHandler DataRecieved;
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public delegate void InsertedEventHandler();
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public delegate void RemovedEventHandler();
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public delegate void DataRecievedEventHandler(byte[] data);
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private readonly HidDevice _scanner;
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private int _isReading;
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public Scanner1902(string devicePath) : this(HidDevices.GetDevice(devicePath)) { }
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public Scanner1902(HidDevice hidDevice)
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{
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_scanner = hidDevice;
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_scanner.Inserted += ScannerInserted;
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_scanner.Removed += ScannerRemoved;
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if (!_scanner.IsOpen) _scanner.OpenDevice();
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_scanner.MonitorDeviceEvents = true;
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BeginReadReport();
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}
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public string DevicePath { get { return _scanner.DevicePath; } }
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public bool IsListening { get; private set; }
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public bool IsConnected { get { return _scanner.IsConnected; } }
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public static IEnumerable<Scanner1902> Enumerate(int vid, int pid)
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{
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return HidDevices.Enumerate(vid, pid).Select(x => new Scanner1902(x));
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}
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public void ErrorBeep()
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{
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var report = _scanner.CreateReport();
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report.ReportId = HidReportId;
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report.Data[0] = ErrorBeepMessage;
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_scanner.WriteReport(report);
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}
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public void SuccessBeep()
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{
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var report = _scanner.CreateReport();
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report.ReportId = HidReportId;
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report.Data[0] = SuccessBeepMessage;
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_scanner.WriteReport(report);
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}
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public void StartScan()
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{
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var report = _scanner.CreateReport();
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report.ReportId = HidReportId;
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report.Data[0] = StartScanMessage;
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_scanner.WriteReport(report);
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}
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public void EndScan()
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{
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var report = _scanner.CreateReport();
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report.ReportId = HidReportId;
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report.Data[0] = EndScanMessage;
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_scanner.WriteReport(report);
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}
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public void StartListen() { IsListening = true; }
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public void StopListen() { IsListening = false; }
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private void BeginReadReport()
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{
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if (Interlocked.CompareExchange(ref _isReading, 1, 0) == 1) return;
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_scanner.ReadReport(ReadReport);
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}
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private void ReadReport(HidReport report)
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{
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var scannerReport = new Report1902(report);
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var data = new byte[] { };
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var currentPosition = 0;
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var readRequired = false;
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if (scannerReport.Length > 0 & scannerReport.ReadStatus == HidDeviceData.ReadStatus.Success)
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{
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do
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{
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if (scannerReport.MoreData && readRequired) scannerReport = new Report1902(_scanner.ReadReport());
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else readRequired = true;
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if (!scannerReport.Exists) continue;
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Array.Resize(ref data, data.GetUpperBound(0) + scannerReport.Data.Length + 1);
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Array.Copy(scannerReport.Data, 0, data, currentPosition, scannerReport.Data.Length);
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currentPosition += scannerReport.Data.Length;
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} while (scannerReport.MoreData && scannerReport.Exists);
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if (IsListening && data.Length > 0 && DataRecieved != null) DataRecieved(data);
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}
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if (scannerReport.ReadStatus != HidDeviceData.ReadStatus.NotConnected) _scanner.ReadReport(ReadReport);
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else _isReading = 0;
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}
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private void ScannerInserted()
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{
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BeginReadReport();
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if (Inserted != null) Inserted();
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}
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private void ScannerRemoved()
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{
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if (Removed != null) Removed();
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}
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public void Dispose()
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{
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_scanner.CloseDevice();
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GC.SuppressFinalize(this);
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}
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~Scanner1902()
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{
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Dispose();
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}
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}
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}
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