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 Main()
{
bool success;
WINUSB_PIPE_INFORMATION pipeInfo;
UsbK usb;
USB_INTERFACE_DESCRIPTOR interfaceDescriptor;
// Find and configure the device.
if (!Test.ConfigureDevice(out pipeInfo, out usb, out interfaceDescriptor))
{
return;
}
if (Test.TransferBufferSize == -1)
{
Test.TransferBufferSize = pipeInfo.MaximumPacketSize * 64;
}
#if BMFW
// TODO FOR USER: Remove this block if not using benchmark firmware.
// This configures devices running benchmark firmware for streaming DeviceToHost transfers.
Console.WriteLine("Configuring for benchmark device..");
BM_TEST_TYPE testType = ((Test.PipeId & 0x80) > 0) ? BM_TEST_TYPE.READ : BM_TEST_TYPE.WRITE;
success = Benchmark.Configure(usb, BM_COMMAND.SET_TEST, interfaceDescriptor.bInterfaceNumber, ref testType);
if (!success)
{
Console.WriteLine("Bench_Configure failed.");
}
#endif
if (!Test.ShowTestReady())
{
goto Done;
}
/* In most cases, you should clear the pipe timeout policy before using asynchronous I/O. (INFINITE)
* This decreases overhead in the driver and generally we managed the timeout ourselves from user code.
*
* Set the PIPE_TRANSFER_TIMEOUT policy to INFINITE:
*/
int[] pipeTimeoutMS = new[] { 0 };
usb.SetPipePolicy((byte)Test.PipeId,
(int)PipePolicyType.PIPE_TRANSFER_TIMEOUT,
Marshal.SizeOf(typeof(int)),
pipeTimeoutMS);
/* In some cases, you may want to set the RAW_IO pipe policy. This will impose more restrictions on the
* allowable transfer buffer sizes but will improve performance. (See documentation for restrictions)
*
* Set the RAW_IO policy to TRUE:
*/
int[] useRawIO = new[] { 1 };
usb.SetPipePolicy((byte)Test.PipeId,
(int)PipePolicyType.RAW_IO,
Marshal.SizeOf(typeof(int)),
useRawIO);
int totalSubmittedTransfers = 0;
int totalCompletedTransfers = 0;
/* We need a different buffer for each MaxPendingIO slot because they will all be submitted to the driver
* (outstanding) at the same time.
*/
byte[][] transferBuffers = new byte[Test.MaxPendingIO][];
OvlK ovlPool = new OvlK(usb.Handle, Test.MaxPendingIO, KOVL_POOL_FLAG.NONE);
List <GCHandle> transferBufferGCList = new List <GCHandle>(Test.MaxPendingIO);
success = true;
// Start transferring data synchronously; one transfer at a time until the test limit (MaxTransfersTotal) is hit.
while (success && totalCompletedTransfers < Test.MaxTransfersTotal)
{
KOVL_HANDLE ovlHandle;
int transferred;
while (success && totalSubmittedTransfers < Test.MaxTransfersTotal)
{
// Get the next KOVL_HANDLE
if (!ovlPool.Acquire(out ovlHandle))
{
// This example expects a failure of NoMoreItems when the pool has no more handles to acquire. This is
// our indication that it is time to begin waiting for a completion.
Debug.Assert(Marshal.GetLastWin32Error() == ErrorCodes.NoMoreItems);
break;
}
// Get the next transfer buffer
int transferBufferIndex = totalSubmittedTransfers % Test.MaxPendingIO;
if (transferBuffers[transferBufferIndex] == null)
{
/* This index has not been allocated yet. We need a different buffer for each MaxPendingIO
* slot because they will all be submitted to the driver (outstanding) at the same time.
*/
Console.WriteLine("Allocating transfer buffer at index:{0}", transferBufferIndex);
transferBuffers[transferBufferIndex] = new byte[Test.TransferBufferSize];
// Transfer buffers should be pinned so the garbage collector cannot move the memory.
transferBufferGCList.Add(GCHandle.Alloc(transferBuffers[transferBufferIndex], GCHandleType.Pinned));
}
byte[] transferBuffer = transferBuffers[transferBufferIndex];
int not_used_for_async;
if ((Test.PipeId & AllKConstants.USB_ENDPOINT_DIRECTION_MASK) > 0)
{
success = usb.ReadPipe((byte)Test.PipeId, transferBuffer, transferBuffer.Length, out not_used_for_async, ovlHandle);
}
else
{
FillMyBufferForWrite(transferBuffer, out transferred);
success = usb.WritePipe((byte)Test.PipeId, transferBuffer, transferred, out not_used_for_async, ovlHandle);
}
if (Marshal.GetLastWin32Error() == ErrorCodes.IoPending)
{
success = true;
totalSubmittedTransfers++;
Console.WriteLine("Pending #{0:0000} {1} bytes.", totalSubmittedTransfers, transferBuffer.Length);
}
else
{
Console.WriteLine("Pending #{0:0000} failed. ErrorCode={1:X8}h", totalSubmittedTransfers, Marshal.GetLastWin32Error());
}
}
if (!success)
{
break;
}
// Wait for the oldest transfer to complete and release the ovlHandle to the pool so it can be re-acquired.
success = ovlPool.WaitOldest(out ovlHandle, 1000, KOVL_WAIT_FLAG.RELEASE_ALWAYS, out transferred);
totalCompletedTransfers++;
if (success)
{
if ((Test.PipeId & AllKConstants.USB_ENDPOINT_DIRECTION_MASK) > 0)
{
ProcessMyBufferFromRead(transferBuffers[(totalCompletedTransfers - 1) % Test.MaxPendingIO], transferred);
}
Console.WriteLine("Complete #{0:0000} {1} bytes.", totalCompletedTransfers, transferred);
}
else
{
Console.WriteLine("Complete #{0:0000} Wait failed. ErrorCode={1:X8}h", totalCompletedTransfers, Marshal.GetLastWin32Error());
}
}
if (!success)
{
Console.WriteLine("An error occured transferring data. ErrorCode: {0:X8}h", Marshal.GetLastWin32Error());
}
ovlPool.Free();
// Free the GC handles allocated for the transfer buffers
foreach (GCHandle gcHandle in transferBufferGCList)
{
gcHandle.Free();
}
Done:
usb.Free();
}