Ze,
You can certainly request lots of 1 ms rx StartFrame based URBs
if you so desire as long as you schedule plenty of them in advance.
I suspect though that you really need the IN tokens rather than
the URBs in every frame and therefore two or more multi-frame
URBs always queued into the USB stack would serve you much
better. Single vs. multi frame URB issue has nothing to do with
the design of your hardware. USB spec and MSFT docs should
clarify the topic for you.
Hope that helps,
-Ilya
----- Original Message -----
Subject: Re: How to send IN urb in each SOF in usb ISO mode?
From: ze zefeng
Date: Mon, 26 Sep 2005 08:57:45 +0800
X-Message-Number: 31
Ilya,
In my problem ,if I use 'StartFrame ',I can’t send IN URB in each
1ms .Maybe I can send IN URB with multi packets , but if do that way
,we will change our device design!.
Does you met such issue in your cases.