/// <summary>
///
/// </summary>
/// <param name="queue"></param>
/// <param name="msgInPacket"></param>
/// <param name="buffer"></param>
/// <param name="size"></param>
internal static void QueueToMsgPacket(SafeQueue <CanMessage> queue, int msgInPacket, out byte[] buffer, out int size)
{
int items = queue.Count;
CanMessage[] frames;
if (items != 0)
{
if (items > msgInPacket)
{
frames = new CanMessage[msgInPacket];
for (int i = 0; i < msgInPacket; i++)
{
frames[i] = queue.Dequeue();
}
}
else
{
frames = new CanMessage[items];
for (int i = 0; i < items; i++)
{
frames[i] = queue.Dequeue();
}
}
buffer = new byte[64];
CanMessage.CanFramesToMsgPacket(frames, buffer, out size);
}
else
{
buffer = new byte[0];
size = 0;
}
}
/// <summary>
///
/// </summary>
/// <param name="iftAr"></param>
void MsgPipeReadComplate(IAsyncResult iftAr)
{
int bytes = 0;
CanMessage[] frames;
//lock (LockObj) Ezt nem lehet lock-ni, mivel adatvesztés következik be.!
{
if (!this.isAbort)
{
try
{
bytes = Usb.Pipes[USB_MSG_IN_ADDR].EndRead(iftAr);
}
catch (Exception ex)
{
/*Itt valahogy jelezni kell, hogy ha hibábval ért véget a pipe olvasása*/
/*Ha itt hiba történt akkor vége.*/
LasException = ex;
this.isAbort = true;
}
}
if (bytes != 0)
{
CanMessage.MsgPacketToCanFrames(rxMsgPacketBuffer, bytes, out frames);
for (int i = 0; i < frames.Length; i++)
{
RxCanMsgAbsTime = (frames[i].TimestampTick * 10000) + RxCanMsgAbsTime;
frames[i].TimestampTick = RxCanMsgAbsTime;
if (IncomingMsgQueue != null)
{
IncomingMsgQueue.Enqueue(frames[i]);
}
}
if (_asyncReadBeginResult != null && !_asyncReadBeginResult.IsCompleted)
{
if (IncomingMsgQueue.Count >= _readBeginLength)
{
Read(_readBeginFrameArray, _readBeginOffset, _readBeginLength);
_asyncReadBeginResult.OnCompletion(false, null, _readBeginLength, true);
}
}
}
if (!this.isAbort)
{
Usb.Pipes[USB_MSG_IN_ADDR].BeginRead(rxMsgPacketBuffer, 0, UsbMsgInEpSize, _asynReadCpltCallback, null);
}
}
}
/// <summary>
///
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public override bool Equals(object obj)
{
// If parameter is null return false.
if (obj == null)
{
return(false);
}
// If parameter cannot be cast to MctComponentItem return false.
CanMessage p = (CanMessage)obj;
if ((System.Object)p == null)
{
return(false);
}
if (p.arbitrationId == this.arbitrationId &&
p.IsRemote == this.IsRemote &&
p.DataLength == this.DataLength)
{
if (p.data == null ^ this.data == null)
{
return(false);
}
else
if (p.data == null && this.data == null)
{
return(true);
}
else
if (p.Data.Length != this.Data.Length)
{
return(false);
}
else
if (p.Data.SequenceEqual(this.Data))
{
return(true);
}
else
{
return(false);
}
}
else
{
return(false);
}
}
/// <summary>
///
/// </summary>
/// <param name="frames"></param>
/// <param name="offset"></param>
/// <param name="length"></param>
internal void WriteToQueue(CanMessage[] frames, int offset, int length)
{
lock (LockObj)
{
for (int i = 0; i < length; i++)
{
OutgoingMsgQueue.Enqueue(frames[i + offset]);
}
try
{
int size;
byte[] buffer;
do
{
CanMessage.QueueToMsgPacket(OutgoingMsgQueue, MaxCanMsgInPacket, out buffer, out size);
if (size != 0)
{
Usb.Pipes[USB_MSG_OUT_ADDR].Write(buffer, 0, size);
}
} while (OutgoingMsgQueue.Count != 0);
}
catch (WinUSB.USBException usbex)
{
if (usbex.InnerException.InnerException is System.ComponentModel.Win32Exception)
{
var i = usbex.InnerException.InnerException as System.ComponentModel.Win32Exception;
if (i.NativeErrorCode == 121)
{
throw new CanAdapterException("Write timeout error. Code:-8609."); //Doc
}
else
{
throw new WinUSB.USBException(usbex.Message);
}
}
else
{
throw new WinUSB.USBException(usbex.Message);
}
}
}
}
/// <summary>
///
/// </summary>
/// <param name="buffer"></param>
/// <param name="size"></param>
/// <param name="frames"></param>
internal static void MsgPacketToCanFrames(byte[] buffer, int size, out CanMessage[] frames)
{
CanMessage[] list = null;
int offset;
byte alwaysZero;
UInt16 alwaysOne;
int msgCnt;
if (size == 0)
{
frames = new CanMessage[0];
return;
}
offset = 0;
msgCnt = buffer[offset];
list = new CanMessage[msgCnt];
offset += 1;
alwaysZero = buffer[offset];
offset += 1;
alwaysOne = (UInt16)BitConverter.ToInt16(buffer, offset);
offset += 2;
for (int i = 0; i < msgCnt; i++)
{
list[i].TwoByte = (UInt16)BitConverter.ToInt16(buffer, offset);
offset += 2;
list[i].TimestampTick = (UInt32)BitConverter.ToInt32(buffer, offset);
offset += 4;
list[i].ArbitrationId = (UInt32)BitConverter.ToInt32(buffer, offset);
offset += 4;
list[i].IsRemote = buffer[offset];
offset += 1;
list[i].DataLength = buffer[offset];
offset += 1;
list[i].Data = new byte[list[i].DataLength];
Buffer.BlockCopy(buffer, offset, list[i].Data, 0, list[i].DataLength);
offset += 8;
}
frames = list;
}