USB 2.0

NTDEV
1

Is there any difference in writing a function driver for USB 1.1 device or
for USB 2.0 device ?
Isn’t it transparent at this level?

Thanks,
Gil Mizrahi

2

I think that you right, it’s transparent at that level.
I wrote a usb driver using the Cypress development board kit and this is
a USB 2.0 and I don’t remember that I did something special for that.

OS.

----- Original Message -----
From: “Gil Mizrahi”
To: “NT Developers Interest List”
Sent: Sunday, January 26, 2003 6:33 PM
Subject: [ntdev] USB 2.0

> Is there any difference in writing a function driver for USB 1.1 device or
> for USB 2.0 device ?
> Isn’t it transparent at this level?
>
> Thanks,
> Gil Mizrahi
>
>
>
> —
> You are currently subscribed to ntdev as: xxxxx@hotmail.com
> To unsubscribe send a blank email to xxxxx@lists.osr.com
>

3

Gil Mizrahi wrote:

Is there any difference in writing a function driver for USB 1.1 device or
for USB 2.0 device ?
Isn’t it transparent at this level?

If you’re dealing with a full- or low-speed device, I’m not aware of any
differences. For a high-speed device, you’d want to take advantage of
the higher endpoint maximum packet sizes you can have and the greater
number of packets you can stuff into one ISO URB.

–
Walter Oney, Consulting and Training
Basic and Advanced Driver Programming Seminars
Now teaming with John Hyde for USB Device Engineering Seminars
Check out our schedule at http://www.oneysoft.com