Re: [PATCH 70/78] USB: add picdem device to ldu sb

On 7/17/07, Hund,  Michael <[email protected]> wrote:
>
>
> Even on full speed devices, I had the problem of missing interrupt transfers
> using libusb. This was the main reason to write ldusb for interrupt
> transfers.
>
> libusb cannot guarantee to handle an interrupt transfer in a time which is
> shorter than the specified time between two interrupt transfers. Lost data
> may be the result.
>

Thanks for the info. I only have experiences with libusb and so far I like
it very much. My main involvement with Linux is to support PICKit 2
programmer (an custom HID device and use interrupt transfer). I have
done tests for various applications under Linux and FreeBSD, mainly the
following two.

1) pk2: http://home.pacbell.net/theposts/picmicro/
2) Piklab: http://piklab.sourceforge.net/

To me libusb works fine with Interrupt transfer for Microchip 18F USB MCU
based project under Linux. They actually work too even under FreeBSD
(which is said to have a fragile libusb implementation) with a bit of tweaking.

http://lists.freebsd.org/pipermail/freebsd-usb/2007-April/003182.html

Regards,
Xiaofan

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