/// <summary>
/// 向读卡器请求命令，并取得返回包
/// </summary>
/// <param name="cmd">请求的命令</param>
/// <param name="data">请求中包含的数据</param>
/// <returns></returns>
public YCTPacket Request(YCTCommandType cmd, byte[] data)
{
lock (_PortLocker)
{
byte[] request = CreateRequest(cmd, data);
if (Log)
{
Ralid.GeneralLibrary.LOG.FileLog.Log("羊城通读卡器", "发送数据: " + HexStringConverter.HexToString(request, " "));
}
_Port.OnDataArrivedEvent -= _Port_OnDataArrivedEvent;
_buffer.Clear();
_Responsed.Reset();
_Response = null;
_Port.OnDataArrivedEvent += _Port_OnDataArrivedEvent;
_Port.SendData(request);
if (_Responsed.WaitOne(5000))
{
if (_Response != null && _Response.CheckCRC() && _Response.Command == (byte)cmd)
{
_LastError = _Response.Status;
return(_Response);
}
}
}
_LastError = -1;
return(null);
}
private byte[] CreateRequest(YCTCommandType cmd, byte[] data)
{
////包结构 头(1byte) + 包长(1byte) + Command(1byte) + data(nbyte) + checksum(1byte)
List <byte> ret = new List <byte>();
ret.Add(0xBA); //头
ret.Add((byte)(2 + (data != null ? data.Length : 0))); //命令+数据+crc的长度
ret.Add((byte)cmd);
if (data != null)
{
ret.AddRange(data);
}
ret.Add(CRCHelper.CalCRC(ret));
return(ret.ToArray());
}
