Re: [libusb] error: usb: Failed to submit initial transfer 0

[jcassidy <jca...@ga...>]

Thanks Xiaofan.  I found that the dc1394_capture_setup() did a call to 
libusb_fill_bulk_transfer( , , 0x81, , , callback, ,0 ). I changed the 
endpoint address to 0x82 to see if it would provide a quick fix.   The 
...capture_setup() function does return successfully, but a subsequent 
call to read() never returns.  It appears that the callback is never 
invoked.

On 2/9/2014, 10:08 PM, Xiaofan Chen wrote:
> Anyway from the xusb output it seems that the host program
> libdc1394 is at fault. It tries to access Endpoint 0x81 (EP 1 IN)
> in Interface 0 but there is not Endpoint 0x81 for Interface 0.
>
> 1) libdc1394 debug output:
>
> [ 8.531323] [00000303] libusb: debug [libusb_claim_interface] interface 0
> [ 8.531992] [00000303] libusb: debug [get_endpoints] building table of
> endpoints.
> [ 8.532008] [00000303] libusb: debug [get_endpoints] interface: 0 pipe
> 1: dir: 0 number: 2
> [ 8.532016] [00000303] libusb: debug [get_endpoints] interface: 0 pipe
> 2: dir: 1 number: 2
> [ 8.532047] [00000303] libusb: debug [darwin_claim_interface] interface opened
> [ 8.532055] [00000303] libusb: debug [ep_to_pipeRef] converting ep
> address 0x81 to pipeRef and interface
> [ 8.532059] [00000303] libusb: warning [ep_to_pipeRef] no pipeRef
> found with endpoint address 0x81.
> [ 8.532062] [00000303] libusb: error [submit_bulk_transfer] endpoint
> not found on any open interface
> libdc1394 error: usb: Failed to submit initial transfer 0
> [ 8.532086] [00000303] libusb: debug [libusb_release_interface] interface 0
> [ 8.532328] [00000303] libusb: debug [libusb_close]
>
>
> 2) xusb output: you can see that for Interface 0, the IN endpoint
> is 0x82. You only have IN endpoint 0x81 in Interface 2.
>
> nb interfaces: 3
>                interface[0]: id = 0
> interface[0].altsetting[0]: num endpoints = 2
>     Class.SubClass.Protocol: EF.05.00
>         endpoint[0].address: 02
>             max packet size: 0400
>            polling interval: 00
>                   max burst: 00   (USB 3.0)
>          bytes per interval: 0000 (USB 3.0)
>         endpoint[1].address: 82
>             max packet size: 0400
>            polling interval: 00
>                   max burst: 00   (USB 3.0)
>          bytes per interval: 0000 (USB 3.0)
>                interface[1]: id = 1
> interface[1].altsetting[0]: num endpoints = 1
>     Class.SubClass.Protocol: EF.05.01
>         endpoint[0].address: 83
>             max packet size: 0400
>            polling interval: 00
>                   max burst: 00   (USB 3.0)
>          bytes per interval: 0000 (USB 3.0)
>                interface[2]: id = 2
> interface[2].altsetting[0]: num endpoints = 1
>     Class.SubClass.Protocol: EF.05.02
>         endpoint[0].address: 81
>             max packet size: 0400
>            polling interval: 00
>                   max burst: 0F   (USB 3.0)
>          bytes per interval: 0000 (USB 3.0)
>