Re: [libusb] Endpoint 0x81 Not Responding

[Tim R. <ti...@pr...>]

Phani Kumar wrote:
>
> I am facing an issue on big endian platform and the details are given
> below:
>
> There is a device with vendor specific command structure. I  send a
> command on OUT endpoint (endpoint number 2) using libusb_bulk_transfer
> and read the output by placing buffer on IN endpoint(Endpoint number
> 0x81).
>
> The OUT endpoint always responds and IN endpoint does not respond. My
> command times out and it calls abort. For the IN endpoint, I am not
> getting interrupt from the device.
>
> The command structure has all unsigned char fields with one integer
> field. I made sure I did byte swapping for the integer field to make
> it endianness compatible.
>
> The same code perfectly works in windows.
>
> May I know if anybody knows any solution for this or am I missing
> something?

Have you done a debug dump of the buffers to check that the content
exactly matches what your Windows system sends?  If the buffers match
byte-for-byte, then it has to work.

-- 
Tim Roberts, ti...@pr...
Providenza & Boekelheide, Inc.