範例裡面WinUSB-Highbandwidth
示範了如何從電腦傳送三筆資料到DEVICE
可是我想要同時傳送與接收資料
所以我修改了ENDPOINT2 把它改成傳資料給電腦
但是好像沒有工作 沒有傳出去
不太懂是哪裡寫錯了 附件是所有成式 我是用PIC18F4550的實驗板做的。
下面是我在MPLAB MAIN 函式裡面修改的情況
if(EP2INEvenNeedsServicingNext == TRUE)
{
if(!USBHandleBusy(EP2INEvenHandle)) //Check if the endpoint has received any data from the host.
{
//Re-arm the OUT endpoint for the next packet:IN_TO_HOST 1
EP2INEvenHandle = USBTransferOnePacket(2, IN_TO_HOST,(BYTE*)&EP2INEvenBuffer,64);
EP2INEvenNeedsServicingNext = FALSE;
}
}
else //else EP2OUTOdd needs servicing next
{
if(!USBHandleBusy(EP2INOddHandle)) //Check if the endpoint has received any data from the host.
{
//Re-arm the OUT endpoint for the next packet:IN_TO_HOST 1
EP2INOddHandle = USBTransferOnePacket(2, IN_TO_HOST,(BYTE*)&EP2INOddBuffer,64);
EP2INEvenNeedsServicingNext = TRUE;
}
}

下面是我在VC++2005的修改

OverlappedReadStructure2.Internal = 0;
OverlappedReadStructure2.InternalHigh = 0;
OverlappedReadStructure2.Offset = 0;
OverlappedReadStructure2.OffsetHigh = 0;
OverlappedReadStructure2.Pointer = 0;
OverlappedReadStructure2.hEvent = IOEvent2;

OverlappedWriteStructure3.Internal = 0;
OverlappedWriteStructure3.InternalHigh = 0;
OverlappedWriteStructure3.Offset = 0;
OverlappedWriteStructure3.OffsetHigh = 0;
OverlappedWriteStructure3.Pointer = 0;
OverlappedWriteStructure3.hEvent = IOEvent3;

//Actually start sending the data.
HighBandwidthWinUSB::WinUsb_WritePipe(MyWinUSBInterfaceHandle, 0x01, &OutputPacketBuffer[0], 64000, &BytesWritten, &OverlappedWriteStructure); //Send data OUT (of the host) on endpoint 1 (pipe ID = 0x01)
HighBandwidthWinUSB::WinUsb_ReadPipe(MyWinUSBInterfaceHandle, 0x02, &InputPacketBuffer2[0], 64000, &BytesRead2, &OverlappedReadStructure2); //Send data OUT (of the host) on endpoint 2 (pipe ID = 0x02)
HighBandwidthWinUSB::WinUsb_WritePipe(MyWinUSBInterfaceHandle, 0x03, &OutputPacketBuffer3[0], 64000, &BytesWritten3, &OverlappedWriteStructure3); //Send data OUT (of the host) on endpoint 3 (pipe ID = 0x03)

//Wait for the data to finish being transferred.
WaitForSingleObject(IOEvent, 9000); //Blocking function until complete or timeout occurs.
WaitForSingleObject(IOEvent2, 9000); //Blocking function until complete or timeout occurs.
WaitForSingleObject(IOEvent3, 9000); //Blocking function until complete or timeout occurs.