public int SubmitNextRead()
{
// Pull from head of Completed list and push to end of Outstanding list
IsoTransferItem isoTransferItem = Completed.First.Value;
Completed.RemoveFirst();
Outstanding.AddLast(isoTransferItem);
// If managing a start frame manually, set it here and update the the frame counter for the next transfer.
SetNextFrameNumber(isoTransferItem);
// Prepare the OvlK handle to be submitted.
OvlPool.ReUse(isoTransferItem.Ovl);
// The data buffer was pinned earlier when it was allocated. Always pin managed memory before using it
// in an asynchronous function to keep the framework from tampering with it.
Usb.IsoReadPipe(PipeInfo.PipeId,
isoTransferItem.Buffer,
DataBufferSize,
isoTransferItem.Ovl,
isoTransferItem.Iso.Handle);
int errorCode = Marshal.GetLastWin32Error();
// 997 is ERROR_IO_PENDING. For async, this means so far so good.
// IE: The transfer is submitted but we won't know if a problem occurs until it is completed.
if (errorCode != ErrorCodes.IoPending)
{
return(errorCode);
}
TotalSubmittedCount++;
return(0);
}
public int WaitRead(out IsoTransferItem isoTransferItem, int i, out int transferred)
{
isoTransferItem = Outstanding.First.Value;
bool success = OvlPool.Wait(isoTransferItem.Ovl, 1000, KOVL_WAIT_FLAG.NONE, out transferred);
if (!success)
{
return(Marshal.GetLastWin32Error());
}
Outstanding.RemoveFirst();
Completed.AddLast(isoTransferItem);
return(0);
}
private static void IsoXferReport(ReadIsoTransferQueue readIsoTransfers, IsoTransferItem isoTransferItem, int transferLength)
{
int packetPos;
Test.Dcs.Stop(transferLength);
if (readIsoTransfers.LastStartFrame == 0)
{
Test.LogLn("#{0}: StartFrame={1:X8}h TransferLength={2} BPS-average:{3}",
readIsoTransfers.CompletedCount,
isoTransferItem.Iso.StartFrame,
transferLength,
Math.Round(Test.Dcs.Bps, 2));
}
else
{
int lastFrameCount = isoTransferItem.Iso.StartFrame - readIsoTransfers.LastStartFrame;
Test.LogLn("#{0}: StartFrame={1:X8}h TransferLength={2} BPS-average:{3} LastFrameCount={4}",
readIsoTransfers.CompletedCount,
isoTransferItem.Iso.StartFrame,
transferLength,
Math.Round(Test.Dcs.Bps, 2),
lastFrameCount);
}
int numPackets = isoTransferItem.Iso.NumberOfPackets;
for (packetPos = 0; packetPos < numPackets; packetPos++)
{
KISO_PACKET isoPacket;
isoTransferItem.Iso.GetPacket(packetPos, out isoPacket);
if (isoPacket.Length > 1)
{
// This is somewhat specific to data that is returned by the benchmark firmware.
byte firstPacketByte = isoTransferItem.Buffer[isoPacket.Offset];
byte secondPacketByte = isoTransferItem.Buffer[isoPacket.Offset + 1];
Test.LogLn(" [{0:000}] Length={1} B0={2:X2}h B1={3:X2}h", packetPos, isoPacket.Length, firstPacketByte, secondPacketByte);
}
else
{
Test.LogLn(" [{0:000}] Empty Packet", packetPos);
}
}
readIsoTransfers.CompletedCount++;
readIsoTransfers.LastStartFrame = isoTransferItem.Iso.StartFrame;
}
public ReadIsoTransferQueue(UsbK usb, ref WINUSB_PIPE_INFORMATION pipeInfo, int maxPendingTransfers, int numberOfPackets)
{
PipeInfo = pipeInfo;
Usb = usb;
OvlPool = new OvlK(usb.Handle, maxPendingTransfers, KOVL_POOL_FLAG.NONE);
DataBufferSize = (pipeInfo.MaximumPacketSize * numberOfPackets);
for (int pos = 0; pos < maxPendingTransfers; pos++)
{
IsoTransferItem isoTransferItem = new IsoTransferItem();
isoTransferItem.Buffer = new byte[pipeInfo.MaximumPacketSize * numberOfPackets];
isoTransferItem.BufferGC = GCHandle.Alloc(isoTransferItem.Buffer, GCHandleType.Pinned);
isoTransferItem.Iso = new IsoK(numberOfPackets, 0);
isoTransferItem.Iso.SetPackets(pipeInfo.MaximumPacketSize);
OvlPool.Acquire(out isoTransferItem.Ovl);
Master.AddLast(isoTransferItem);
Completed.AddLast(isoTransferItem);
}
}
public int WaitRead(out IsoTransferItem isoTransferItem, int i, out int transferred)
{
isoTransferItem = Outstanding.First.Value;
bool success = OvlPool.Wait(isoTransferItem.Ovl, 1000, KOVL_WAIT_FLAG.NONE, out transferred);
if (!success)
{
return Marshal.GetLastWin32Error();
}
Outstanding.RemoveFirst();
Completed.AddLast(isoTransferItem);
return 0;
}
private static void SetNextFrameNumber(IsoTransferItem isoTransferItem)
{
}
public ReadIsoTransferQueue(UsbK usb, ref WINUSB_PIPE_INFORMATION pipeInfo, int maxPendingTransfers, int numberOfPackets)
{
PipeInfo = pipeInfo;
Usb = usb;
OvlPool = new OvlK(usb.Handle, maxPendingTransfers, KOVL_POOL_FLAG.NONE);
DataBufferSize = (pipeInfo.MaximumPacketSize*numberOfPackets);
for (int pos = 0; pos < maxPendingTransfers; pos++)
{
IsoTransferItem isoTransferItem = new IsoTransferItem();
isoTransferItem.Buffer = new byte[pipeInfo.MaximumPacketSize*numberOfPackets];
isoTransferItem.BufferGC = GCHandle.Alloc(isoTransferItem.Buffer, GCHandleType.Pinned);
isoTransferItem.Iso = new IsoK(numberOfPackets, 0);
isoTransferItem.Iso.SetPackets(pipeInfo.MaximumPacketSize);
OvlPool.Acquire(out isoTransferItem.Ovl);
Master.AddLast(isoTransferItem);
Completed.AddLast(isoTransferItem);
}
}
private static void IsoXferReport(ReadIsoTransferQueue readIsoTransfers, IsoTransferItem isoTransferItem, int transferLength)
{
int packetPos;
Test.Dcs.Stop(transferLength);
if (readIsoTransfers.LastStartFrame == 0)
{
Test.LogLn("#{0}: StartFrame={1:X8}h TransferLength={2} BPS-average:{3}",
readIsoTransfers.CompletedCount,
isoTransferItem.Iso.StartFrame,
transferLength,
Math.Round(Test.Dcs.Bps, 2));
}
else
{
int lastFrameCount = isoTransferItem.Iso.StartFrame - readIsoTransfers.LastStartFrame;
Test.LogLn("#{0}: StartFrame={1:X8}h TransferLength={2} BPS-average:{3} LastFrameCount={4}",
readIsoTransfers.CompletedCount,
isoTransferItem.Iso.StartFrame,
transferLength,
Math.Round(Test.Dcs.Bps, 2),
lastFrameCount);
}
int numPackets = isoTransferItem.Iso.NumberOfPackets;
for (packetPos = 0; packetPos < numPackets; packetPos++)
{
KISO_PACKET isoPacket;
isoTransferItem.Iso.GetPacket(packetPos, out isoPacket);
if (isoPacket.Length > 1)
{
// This is somewhat specific to data that is returned by the benchmark firmware.
byte firstPacketByte = isoTransferItem.Buffer[isoPacket.Offset];
byte secondPacketByte = isoTransferItem.Buffer[isoPacket.Offset + 1];
Test.LogLn(" [{0:000}] Length={1} B0={2:X2}h B1={3:X2}h", packetPos, isoPacket.Length, firstPacketByte, secondPacketByte);
}
else
{
Test.LogLn(" [{0:000}] Empty Packet", packetPos);
}
}
readIsoTransfers.CompletedCount++;
readIsoTransfers.LastStartFrame = isoTransferItem.Iso.StartFrame;
}
private static void SetNextFrameNumber(IsoTransferItem isoTransferItem)
{
}