话说RFID以前很火所以整理一下一年前自己处理的RFID程序，放源码.
一开始觉得他是个很神奇的东西。 包含串口通讯和网络通讯。 由于网络通讯设备太贵，所以国内的设备基本上都是在外置一个比较便宜的模块在里面。
本案例应该适用于大多数的RFID模块。
首先我们先放上RFID API：如下
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices; namespace Rfid
{
public class EPCSDKHelper
{
[DllImport("EPCSDK.dll")]
public static extern IntPtr OpenComm(int portNo); [DllImport("EPCSDK.dll")]
public static extern void CloseComm(IntPtr hCom); [DllImport("EPCSDK.dll")]
public static extern bool ReadFirmwareVersion(IntPtr hCom, out int main, out int sub, byte ReaderAddr); [DllImport("EPCSDK.dll")]
public static extern bool GetReaderParameters(IntPtr hCom, int addr, int paramNum, byte[] parms, byte ReaderAddr); [DllImport("EPCSDK.dll")]
public static extern bool SetReaderParameters(IntPtr hCom, int addr, int paramNum, byte[] parms, byte ReaderAddr); [DllImport("EPCSDK.dll")]
public static extern bool StopReading(IntPtr hCom, byte ReaderAddr); [DllImport("EPCSDK.dll")]
public static extern bool ResumeReading(IntPtr hCom, byte ReaderAddr); [DllImport("EPCSDK.dll")]
public static extern bool IdentifySingleTag(IntPtr hCom, byte[] tagId, byte[] antennaNo, byte ReaderAddr); [DllImport("EPCSDK.dll")]
public static extern bool IdentifyUploadedSingleTag(IntPtr hCom, byte[] tagId, byte[] devNos, byte[] antennaNo); [DllImport("EPCSDK.dll")]
public static extern bool IdentifyUploadedMultiTags(IntPtr hCom, out byte tagNum, byte[] tagIds, byte[] devNos, byte[] antennaNos); [DllImport("EPCSDK.dll")]
public static extern bool ReadTag(IntPtr hCom, byte memBank, byte address, byte length, byte[] data, byte ReaderAddr); [DllImport("EPCSDK.dll")]
public static extern bool WriteTagSingleWord(IntPtr hCom, byte memBank, byte address, byte data1, byte data2, byte ReaderAddr); [DllImport("EPCSDK.dll")]
public static extern bool FastWriteTagID(IntPtr hCom, int bytesNum, byte[] bytes, byte ReaderAddr); [DllImport("EPCSDK.dll")]
public static extern bool FastWriteTagID_Lock(IntPtr hCom, int bytesNum, byte[] bytes, byte ReaderAddr); [DllImport("EPCSDK.dll")]
public static extern bool InitializeTag(IntPtr hCom, byte ReaderAddr); [DllImport("EPCSDK.dll")]
public static extern bool LockPassWordTag(IntPtr hCom, byte passwd1, byte passwd2, byte passwd3, byte passwd4, byte lockType, byte ReaderAddr); [DllImport("EPCSDK.dll")]
public static extern bool UnlockPassWordTag(IntPtr hCom, byte passwd1, byte passwd2, byte passwd3, byte passwd4, byte lockType, byte ReaderAddr); [DllImport("EPCSDK.dll")]
public static extern bool KillTag(IntPtr hCom, byte passwd1, byte passwd2, byte passwd3, byte passwd4, byte ReaderAddr);
}
}
我们看到OpenComm他还是一串口方式打开的。
我们要记录每个设备的信息所以我们需要一个设备类
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using RfidService.Common; namespace Rfid
{
public class RfidDevice
{
/// <summary>
/// 开启监听现成
/// </summary>
private Thread _mThread = null; /// <summary>
/// 暂停事件
/// </summary>
private readonly ManualResetEvent _mManualReset = null; /// <summary>
/// 串口号
/// </summary>
private readonly int _comNo = 0; /// <summary>
/// 时间间隔
/// </summary>
private readonly int _timeTick = 0; /// <summary>
/// 是否多卡读取
/// </summary>
private bool _multiFlag = false; /// <summary>
/// RFID数据
/// </summary>
private readonly List<byte[]> _data = new List<byte[]>(); /// <summary>
/// 数据锁
/// </summary>
private readonly object _dataLock = new object(); /// <summary>
/// 错误数量
/// </summary>
private int _errorCount = 0; /// <summary>
/// 只读 串口号
/// </summary>
public int ComNo
{
get
{
return _comNo;
}
} /// <summary>
/// 串口句柄
/// </summary>
public IntPtr ComHadle { set; get; } /// <summary>
/// 只读 时间间隔 毫秒级
/// </summary>
public int TimeTick
{
get
{
return _timeTick;
}
} /// <summary>
/// 是否多卡标志
/// </summary>
public bool MultiFlag { set { _multiFlag = value; } get { return _multiFlag; } } /// <summary>
/// 暂停读取标志
/// </summary>
public bool StopReadFlag { set; get; } /// <summary>
/// 出入串口
/// </summary>
public PassCom PassCom { set; get; } /// <summary>
/// 构造函数
/// </summary>
/// <param name="comNo"></param>
/// <param name="sleepTime"></param>
public RfidDevice(int comNo,int sleepTime)
{
_comNo = comNo;
_timeTick = sleepTime;
_mManualReset = new ManualResetEvent(true);
ComHadle = EPCSDKHelper.OpenComm(_comNo);
if (ComHadle == new IntPtr())
{
//输出系统日志
//throw new Exception("打开串口失败！"); LogInfo.Error("打开串口:" + comNo + "失败！" );
}
} /// <summary>
/// 构造函数
/// </summary>
/// <param name="comNo"></param>
/// <param name="sleepTime"></param>
/// <param name="multiFlag"></param>
public RfidDevice(int comNo, int sleepTime,bool multiFlag)
{
_comNo = comNo;
_timeTick = sleepTime;
MultiFlag = multiFlag;
_mManualReset = new ManualResetEvent(true);
ComHadle = EPCSDKHelper.OpenComm(_comNo);
if (ComHadle == new IntPtr())
{
//输出系统日志
//throw new Exception("打开串口失败！");
LogInfo.Error("打开串口:" + comNo + "失败！");
}
} /// <summary>
/// 构造函数
/// </summary>
/// <param name="comNo"></param>
/// <param name="sleepTime"></param>
/// <param name="multiFlag"></param>
/// <param name="passCom"></param>
public RfidDevice(int comNo, int sleepTime, bool multiFlag,PassCom passCom)
{
_comNo = comNo;
_timeTick = sleepTime;
_multiFlag = multiFlag;
MultiFlag = multiFlag;
_mManualReset = new ManualResetEvent(true);
this.PassCom = passCom;
ComHadle = EPCSDKHelper.OpenComm(_comNo);
#if DEBUG
Console.WriteLine("串口号：" + this.ComNo.ToString() + " - " + ComHadle.ToString());
#endif
if (ComHadle == new IntPtr())
{
//输出系统日志
//throw new Exception("打开串口失败！");
LogInfo.Error("打开串口:" + comNo + "失败！");
}
} /// <summary>
/// 关闭串口
/// </summary>
public void CloseComm()
{
EPCSDKHelper.CloseComm(this.ComHadle);
LogInfo.Info("关闭串口:" + this.ComNo );
} /// <summary>
/// 开始读取
/// </summary>
public void Start()
{
if (_mThread != null) return;
_mThread = new Thread(GetRfidTag) {IsBackground = true};
_mThread.Start();
} /// <summary>
/// 暂停
/// </summary>
public void ReStart()
{
_mManualReset.Set();
} /// <summary>
/// 继续
/// </summary>
public void Stop()
{
_mManualReset.Reset();
} /// <summary>
/// 获取RFID标签现成
/// </summary>
private void GetRfidTag()
{
while(true)
{
GcCollect();
try
{
Monitor.Enter(this._dataLock);
_mManualReset.WaitOne();
byte[] ids;
byte[] devNos;
byte[] antennaNos;
if (this._multiFlag)
{
ids = new byte[12 * 200];
devNos = new byte[200];
antennaNos = new byte[200];
//处理多卡读取模式
byte idNum = 0;
if (EPCSDKHelper.IdentifyUploadedMultiTags(this.ComHadle, out idNum, ids, devNos, antennaNos))
{
_errorCount = 0;
var tmpids = new byte[idNum * 12];
Array.Copy(ids, 0, tmpids, 0, tmpids.Length);
this._data.Add(tmpids);
#if DEBUG
Console.WriteLine("串口号："+this.ComNo.ToString() + " - " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.yyy") + " - 02 - " + TextEncoder.ByteArrayToHexString(ids));
LogInfo.Info("串口号：" + this.ComNo.ToString() + " - " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.yyy") + " - 02 - " + TextEncoder.ByteArrayToHexString(ids));
#endif
}
}
else
{
ids = new byte[12];
devNos = new byte[1];
antennaNos = new byte[1];
//处理单卡读取模式
if (EPCSDKHelper.IdentifyUploadedSingleTag(this.ComHadle, ids, devNos, antennaNos))
{
_errorCount = 0;
this._data.Add(ids);
#if DEBUG
Console.WriteLine("串口号：" + this.ComNo.ToString() + " - " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.yyy") + " - 01 - " + TextEncoder.ByteArrayToHexString(ids));
LogInfo.Info("串口号：" + this.ComNo.ToString() + " - " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.yyy") + " - 01 - " + TextEncoder.ByteArrayToHexString(ids));
#endif
}
}
}
catch (Exception er)
{
#if DEBUG
Console.WriteLine("串口号：" + this.ComNo.ToString() + " - " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.yyy") + " Error: " + er.Message);
LogInfo.Error("串口号：" + this.ComNo.ToString() + " - " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.yyy") + " Error: " + er.Message);
#endif
_errorCount++;
if (_errorCount > 10)
{
//设备复位
}
}
finally
{
Monitor.Exit(this._dataLock);
}
Thread.Sleep(this._timeTick);
}
} /// <summary>
/// 获取RFID数据标签
/// </summary>
/// <returns></returns>
public IList<byte[]> GetData()
{
try
{
Monitor.Enter(this._dataLock);
GC.WaitForPendingFinalizers();
GC.Collect();
GC.WaitForPendingFinalizers();
var tmpData = new List<byte[]>();
tmpData.AddRange(_data);
_data.Clear();
#if DEBUG
Console.WriteLine("串口号：" + this.ComNo.ToString() + " - " + "_tmpData:" + tmpData.Count + " _data:" + _data.Count);
LogInfo.Info("串口号：" + this.ComNo.ToString() + " - " + "_tmpData:" + tmpData.Count + " _data:" + _data.Count);
#endif
return tmpData;
}
finally
{
Monitor.Exit(this._dataLock);
}
} /// <summary>
/// 数据回收
/// </summary>
private static void GcCollect()
{
GC.WaitForFullGCComplete();
GC.Collect();
GC.WaitForFullGCComplete();
} }
}
当然我们还需要一个设备管理类作为设备的监管。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using RfidService;
using System.Diagnostics;
using System.Threading;
using RfidService.Common; namespace Rfid
{
public class RfidDevices : IDisposable
{
/// <summary>
/// RFID设备集合
/// </summary>
private IList<RfidDevice> _lstRfidDevice = new List<RfidDevice>();
private readonly RfidDataContext _oRfidDataContext = new RfidDataContext();
/// <summary>
/// 添加RFID设备
/// </summary>
/// <param name="rfidDevice"></param>
public void Add(RfidDevice rfidDevice)
{
this._lstRfidDevice.Add(rfidDevice);
} /// <summary>
/// 移除RFID设备
/// </summary>
/// <param name="rfidDevice"></param>
public void Remove(RfidDevice rfidDevice)
{
foreach (var o in _lstRfidDevice.Where(o => o.ComHadle == rfidDevice.ComHadle &&
o.ComNo == rfidDevice.ComNo))
{
_lstRfidDevice.Remove(o);
break;
}
} public void DeviceClose()
{
foreach (var o in _lstRfidDevice)
{
try
{
o.CloseComm();
}
catch(Exception er)
{
LogInfo.Error("设备监听关闭失败:" + o.ComNo);
LogInfo.Error("设备监听关闭失败:" + er.Message);
}
}
} public IList<RfidDevice> GetDevices()
{
return _lstRfidDevice;
} readonly object _oLock = new object();
/// <summary>
/// 获取所有设备数据
/// </summary>
/// <returns></returns>
public void GetData()
{
try
{
Monitor.Enter(_oLock);
var sw = new Stopwatch();
sw.Start();
var lstByteArray = new List<byte[]>();
var serviceDateTime = DateTime.Now;
foreach (var o in _lstRfidDevice)
{
try
{
var lstByt = o.GetData();
foreach (var byt in lstByt)
{
for (var i = 0; i < byt.Length; i = i + 12)
{
var buffer = new byte[4];
GcCollect();
Array.Copy(byt, i + 8, buffer, 0, 4);
var id = ((buffer[0]) + (buffer[1] << 8) + (buffer[2] << 16) + (buffer[3] << 32)).ToString();
//处理自己的业务把
}
} }
catch (Exception er)
{
Console.WriteLine(er.Message + "\t\n" + er.StackTrace.ToString());
LogInfo.Info(er.Message);
LogInfo.Info(er.StackTrace.ToString());
}
}
sw.Stop();
Console.WriteLine("操作数据库执行时间:" + sw.ElapsedMilliseconds.ToString());
LogInfo.Info("操作数据库执行时间：" + sw.ElapsedMilliseconds.ToString());
}
finally
{
Monitor.Exit(_oLock);
}
} public void Dispose()
{
_lstRfidDevice.Clear();
_lstRfidDevice = null;
GcCollect();
} public void GcCollect()
{
GC.WaitForPendingFinalizers();
GC.Collect();
GC.WaitForPendingFinalizers();
}
}
}
通过以上几个类我们可以对设备的记录读写了。 在设备处理方法中你可以自行处理自己的业务逻辑。
其实从整体上看RFID的处理还是很简单的。 跟处理串口没什么却别。发送数据-> 读取接收的数据->解析->处理业务入库。
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