Re: [Libusb-devel] USB timeout from virtualbox guest

[Moses M. <mo...@te...>]

Here's a link which describes my fix.

http://www.lpcware.com/content/forum/control-pipe-stall-problem-nxpusblib

I'm not using interrupt endpoints (yet) so I don't know about them.

Moses

On 04/23/2012 01:46 PM, Akos Vandra wrote:
> Hi!
>
> My device is an LPC1768 microcontroller, with firmware written by me.
> I've used mostly the NXP's library to drive the USB peripheral.
> I have 4 endpoints, 2 bulk in/out and 2 interrupt in/out. It is a
> canusb adapter. I query the interrupt transfers to know how many
> packet are in the queue, and use the bulk endpoints to transfer the
> received packets. (Not the best solution I know, it will be redesigned
> in the future - but alas it should be working).
>
> What was the code you were using, and what was the error you found?
> I'm going to check the firmware myself tomorrow, if that might be in
> error (wouldn't be surprised considering NXP's libraries...).
> But the transfers failing are interrupt transfers, not control transfers.
>
> The device is on a USB3.0 bus, but it is capable only of USB2.0 high
> speed (12MBit/s). I tried plugging it into a USB2.0 port, but it
> didn't help.
> My timeouts are not tight at all, they are 100ms, but I increasing
> that to 1000ms didn't help.
>
> I've attached the usbmon outputs.
>
> Thanks for your help,
>    Ákos Vandra