Hi, Gurus, I am doing a Asynchronous Bulk call to USB, everything seems to work fine, but after I call the first libusb_handle_events_timeout, I Received ABORT_PIPE from USBTrace, After the second libusb_handle_events_timeout call, the callback receive the message. (no sure why I have to call libusb_handle_events_timeout twice before I got the call back with that little data), I have legacy code (Windows API) doing the same thing but I did not receive ABORT_PIPE from USBTrace, any ideas?
I am using VS2008, Windows 7
Also I have to call
err = libusb_claim_interface(this->m_handle, 0);
Before submit, do not understand why I have to do that for this function,
while other function seems to work without the above call.
Thanks in advance.
I attached comparison between the legacy USB Trace and libUSBTrace
different in this email.
(WriteCallback is a static function)
My code is as following:
class WriteData
{
public:
int ErrorCode;
int ByteTransfered;
bool ExitTransfer;
};
void LIBUSB_CALL USB_Device::WriteCallback(struct libusb_transfer *transfer)
{
WriteData* wd =(WriteData*)transfer->user_data;
wd->ByteTransfered=transfer->actual_length;
wd->ErrorCode==transfer->status;
wd->ExitTransfer=true;
}
libusb_transfer* USB_Device::Alloc_Transfers( const unsigned long
endpoint,
const unsigned int c_uiLength,
unsigned char* pbBuffer,
void* userdata,
int& err)
{
libusb_transfer* transfer =libusb_alloc_transfer(0);
if (!transfer)
{
err=-ENOMEM;
return NULL;
}
libusb_fill_bulk_transfer (transfer,m_handle,endpoint,pbBuffer,c_uiLength,U
SB_Device::WriteCallback,userdata,ITP_TRANSFER_TIMEOUT);
return transfer;
}
int USB_Device::BulkWrite(
const unsigned long c_ulPipeNum,
const unsigned int c_uiLength,
unsigned char* pbBuffer,
HANDLE cancelEvent)
{
const unsigned long endpoint=c_ulPipeNum*2;
WriteData* wd=new WriteData();
wd->ExitTransfer=false;
int err =0;
libusb_transfer* transfer=Alloc_Transfers(endpoint,c_uiLength,
pbBuffer,(void*)wd,err);
if (!err)
{
err = libusb_claim_interface(this->m_handle, 0); //Do I need to claim
err=libusb_submit_transfer(transfer);
while (!wd->ExitTransfer)
{
struct timeval tv = { 1, 0 };
err = libusb_handle_events_timeout(NULL, &tv);
if (err < 0)
{
break;
}
}
}
if (err < 0)
{
libusb_cancel_transfer(transfer);
while (transfer)
if (libusb_handle_events(NULL) < 0)
break;
return err;
}
}
The debug log is as following:
[ 4.045232] [000006d8] libusbx: debug [libusb_claim_interface] interface 0
[ 4.045232] [000006d8] libusbx: debug [winusb_claim_interface] claimed
interface 0
[ 4.046232] [000006d8] libusbx: debug [libusb_get_config_descriptor] index 0
[ 4.047232] [000006d8] libusbx: debug [windows_assign_endpoints]
(re)assigned endpoint 01 to interface 0
[ 4.047232] [000006d8] libusbx: debug [windows_assign_endpoints]
(re)assigned endpoint 02 to interface 0
[ 4.048232] [000006d8] libusbx: debug [windows_assign_endpoints]
(re)assigned endpoint 04 to interface 0
[ 4.049232] [000006d8] libusbx: debug [windows_assign_endpoints]
(re)assigned endpoint 86 to interface 0
[ 4.050232] [000006d8] libusbx: debug [windows_assign_endpoints]
(re)assigned endpoint 88 to interface 0
[ 4.501258] [000006d8] libusbx: debug [winusb_submit_bulk_transfer] matched
endpoint 02 with interface 0
[ 4.501258] [000006d8] libusbx: debug [winusb_submit_bulk_transfer] writing
30 bytes
[ 4.502258] [000006d8] libusbx: debug [usbi_add_pollfd] add fd 5 events 4
[ 4.503258] [000006d8] libusbx: debug [libusb_get_next_timeout] next
timeout in 2.997276s
[ 4.505258] [000006d8] libusbx: debug
[libusb_handle_events_timeout_completed] doing our own event handling
[ 4.506258] [000006d8] libusbx: debug [handle_events] poll() 2 fds with
timeout in 1000ms
[ 4.507258] [000006d8] libusbx: debug [handle_events] poll() returned 1
[ 4.508258] [000006d8] libusbx: debug [windows_handle_events] checking fd 3
with revents = 0000
[ 4.509258] [000006d8] libusbx: debug [windows_handle_events] checking fd 5
with revents = 0004
[ 4.510258] [000006d8] libusbx: debug [usbi_remove_pollfd] remove fd 5
[ 4.510258] [000006d8] libusbx: debug [windows_transfer_callback] handling
I/O completion with errcode 0
[ 4.511258] [000006d8] libusbx: debug [usbi_handle_transfer_completion]
transfer 005A8560 has callback 00B68CD5
Title: Text Compare
Text CompareProduced: 8/2/2012 10:18:14 PM
Mode: All
Left file: C:\temp\USB\LegacyWrite.txt Right file: F:\LibUsbWriteTrace.txt
| [ TXT Log File Generated By USBTrace ] | = | [ TXT Log File Generated By USBTrace ] |
| --------- Request # 0 ----[OUT]---- | <> | --------- Request # 1 ----[OUT]---- |
| = | ||
| URB_FUNCTION_BULK_OR_INTERRUPT_TRANSFER | URB_FUNCTION_BULK_OR_INTERRUPT_TRANSFER | |
| Length: 0x80 | Length: 0x80 | |
| USBD Status: USBD_STATUS_SUCCESS (0x0) | USBD Status: USBD_STATUS_SUCCESS (0x0) | |
| EndpointAddress: 0x2 | EndpointAddress: 0x2 | |
| PipeHandle: 0xFFFFFA800D63FDE8 | <> | PipeHandle: 0xFFFFFA8009BF68C8 |
| TransferFlags: 0x0 ( USBD_TRANSFER_DIRECTION_OUT ) | = | TransferFlags: 0x0 ( USBD_TRANSFER_DIRECTION_OUT ) |
| TransferBufferLength: 0x20 | <> | TransferBufferLength: 0x1E |
| TransferBuffer: 0x0 | = | TransferBuffer: 0x0 |
| TransferBufferMDL: 0x118CBBB0 | <> | TransferBufferMDL: 0x9376DF0 |
| UrbLink: 0x0 | = | UrbLink: 0x0 |
| ** Data ** | ** Data ** | |
| FB 40 01 FD 09 03 05 D0 FB F0 05 FD 02 02 40 B0 00 01 4A B0 10 00 FF B0 00 80 7F B0 00 00 00 91 | <> | 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D |
| = | ||
| --------- Request # 1 ----[OUT]---- | <> | --------- Request # 2 ----[OUT]---- |
| = | ||
| URB_FUNCTION_BULK_OR_INTERRUPT_TRANSFER | URB_FUNCTION_BULK_OR_INTERRUPT_TRANSFER | |
| Length: 0x80 | Length: 0x80 | |
| USBD Status: USBD_STATUS_SUCCESS (0x0) | USBD Status: USBD_STATUS_SUCCESS (0x0) | |
| EndpointAddress: 0x2 | EndpointAddress: 0x2 | |
| PipeHandle: 0xFFFFFA800D63FDE8 | <> | PipeHandle: 0xFFFFFA8009BF68C8 |
| TransferFlags: 0x0 ( USBD_TRANSFER_DIRECTION_OUT ) | = | TransferFlags: 0x0 ( USBD_TRANSFER_DIRECTION_OUT ) |
| TransferBufferLength: 0x20 | <> | TransferBufferLength: 0x1E |
| TransferBuffer: 0x0 | = | TransferBuffer: 0x0 |
| TransferBufferMDL: 0x118CBBB0 | <> | TransferBufferMDL: 0x9376DF0 |
| UrbLink: 0x0 | = | UrbLink: 0x0 |
| ** Data ** | ** Data ** | |
| FB 40 01 FD 09 03 05 D0 FB F0 05 FD 02 02 40 B0 00 01 4A B0 10 00 FF B0 00 80 7F B0 00 00 00 91 | <> | 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D |
| = | ||
| --------- Request # 2 ----[IN]---- | <> | --------- Request # 3 ----[IN]---- |
| = | ||
| URB_FUNCTION_BULK_OR_INTERRUPT_TRANSFER | URB_FUNCTION_BULK_OR_INTERRUPT_TRANSFER | |
| Length: 0x80 | Length: 0x80 | |
| USBD Status: USBD_STATUS_PENDING (0x40000000) | USBD Status: USBD_STATUS_PENDING (0x40000000) | |
| EndpointAddress: 0x2 | EndpointAddress: 0x2 | |
| PipeHandle: 0xFFFFFA800D63FDE8 | <> | PipeHandle: 0xFFFFFA8009BF68C8 |
| TransferFlags: 0x0 ( USBD_TRANSFER_DIRECTION_OUT ) | = | TransferFlags: 0x0 ( USBD_TRANSFER_DIRECTION_OUT ) |
| TransferBufferLength: 0x0 | TransferBufferLength: 0x0 | |
| TransferBuffer: 0x0 | TransferBuffer: 0x0 | |
| TransferBufferMDL: 0x118CBBB0 | <> | TransferBufferMDL: 0x9376DF0 |
| UrbLink: 0x0 | = | UrbLink: 0x0 |
| --------- Request # 3 ----[IN]---- | <> | --------- Request # 4 ----[IN]---- |
| = | ||
| URB_FUNCTION_BULK_OR_INTERRUPT_TRANSFER | URB_FUNCTION_BULK_OR_INTERRUPT_TRANSFER | |
| Length: 0x80 | Length: 0x80 | |
| USBD Status: USBD_STATUS_SUCCESS (0x0) | USBD Status: USBD_STATUS_SUCCESS (0x0) | |
| EndpointAddress: 0x2 | EndpointAddress: 0x2 | |
| PipeHandle: 0xFFFFFA800D63FDE8 | <> | PipeHandle: 0xFFFFFA8009BF68C8 |
| TransferFlags: 0x0 ( USBD_TRANSFER_DIRECTION_OUT ) | = | TransferFlags: 0x0 ( USBD_TRANSFER_DIRECTION_OUT ) |
| TransferBufferLength: 0x20 | <> | TransferBufferLength: 0x1E |
| TransferBuffer: 0x0 | = | TransferBuffer: 0x0 |
| TransferBufferMDL: 0x118CBBB0 | <> | TransferBufferMDL: 0x9376DF0 |
| UrbLink: 0x0 | = | UrbLink: 0x0 |
| -+ | --------- Request # 5 ----[OUT]---- | |
| URB_FUNCTION_ABORT_PIPE | ||
| Length: 0x28 | ||
| USBD Status: USBD_STATUS_SUCCESS (0x0) | ||
| EndpointAddress: 0x2 | ||
| PipeHandle: 0xFFFFFA8009BF68C8 | ||
| --------- Request # 6 ----[OUT]---- | ||
| URB_FUNCTION_ABORT_PIPE | ||
| Length: 0x28 | ||
| USBD Status: USBD_STATUS_SUCCESS (0x0) | ||
| EndpointAddress: 0x2 | ||
| PipeHandle: 0xFFFFFA8009BF68C8 | ||
| --------- Request # 7 ----[IN]---- | ||
| URB_FUNCTION_ABORT_PIPE | ||
| Length: 0x28 | ||
| USBD Status: USBD_STATUS_SUCCESS (0x0) | ||
| EndpointAddress: 0x2 | ||
| PipeHandle: 0xFFFFFA8009BF68C8 | ||
| --------- Request # 8 ----[IN]---- | ||
| URB_FUNCTION_ABORT_PIPE | ||
| Length: 0x28 | ||
| USBD Status: USBD_STATUS_SUCCESS (0x0) | ||
| EndpointAddress: 0x2 | ||
| PipeHandle: 0xFFFFFA8009BF68C8 | ||
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