isochronous transfers in USB

NTDEV
1

Hi all,

I’m developing isochronous transactions driver for cypress EZ-USB FX2 chip. This chip 'd be connected to windows by usb cable.
I couldn’t find much help from msdn. does somebody has any idea where to look for isochronous transfers examples?
Is there any API/examples are provided in DDK as bulk usb driver is available for bulk transfers.

Thanks in advance
Sanjeev

2

Don’t you have the EZ-USB dev kit? It has examples and test programs for
all that stuff.

Loren

----- Original Message -----
From: “Sanjeev Manral”
To: “Windows System Software Devs Interest List”
Sent: Sunday, September 21, 2003 9:16 PM
Subject: [ntdev] isochronous transfers in USB

> Hi all,
>
> I’m developing isochronous transactions driver for cypress EZ-USB FX2
chip. This chip 'd be connected to windows by usb cable.
> I couldn’t find much help from msdn. does somebody has any idea where to
look for isochronous transfers examples?
> Is there any API/examples are provided in DDK as bulk usb driver is
available for bulk transfers.
>
>
> Thanks in advance
> Sanjeev

3

Yes I got it there; Thanks a ton! Actually it was in different directory than FX2, so missed it.

I’m developing frame conversance with this chip for wireless.
I also need to study all about USB frames,SOF structures, protocol and timings. Some information I found in FX2 reference manual introduction. But I feel I need more detailed information do you have any idea where can I get this?

Thanks in advance,
Sanjeev

4

www.usb.org
Norbert.

“The gene pool could use a little chlorine.”
---- snip ----

have any idea where can I get this?
---- snip ----

5

Loren Wilton wrote:

Don’t you have the EZ-USB dev kit? It has examples and test programs for
all that stuff.
From: “Sanjeev Manral”
> > I’m developing isochronous transactions driver for cypress EZ-USB FX2
> chip. This chip 'd be connected to windows by usb cable.
> > I couldn’t find much help from msdn. does somebody has any idea where to
> look for isochronous transfers examples?
> > Is there any API/examples are provided in DDK as bulk usb driver is
> available for bulk transfers.

I wouldn’t suggest using the Cypress samples unless they’ve been greatly
improved from a few years ago. Both the DDK and my book have examples of
doing isochronous transfers.

–
Walter Oney, Consulting and Training
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