Re: [Libusb-win32-devel] Understanding iIsochronous transfer with libusb-win32

[Xiaofan C. <xia...@gm...>]

On 7/30/07, Xiaofan Chen <xia...@gm...> wrote:
> I am in the process of writing a simple isochronous transfer  firmware for
> Microchip PICkit 2 (PIC18F2550). I need a host application to test it.
> http://forum.microchip.com/tm.aspx?m=270049&mpage=2
>
> Based on some of the examples Stephan posted here, I come out the
> following test program and it seems to work. However, I do not quite
> understand the code since I do not quite understand isochronous transfer.
> Why we need three context? What is the benefit? Now three buffers
> contain the same data.
>

Part of the problem is the lack of documentation for these functions. People
like Staphano in the Microchip forum thread did not know that libusb-win32
supports isoc transfer. It would be nice that the libusb-win32 website to be
updated to reflect the changes.

Xiaofan