Re: USB 2.0 ISO Allways at Beginning of SOF?

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Why in Heaven's name does it matter? I cannot think of a SINGLE
circumstance in which it would be important to know this.
--
Tim Roberts, timr@xxxxxxxxx
Providenza & Boekelheide, Inc.

Oh, I don't know, guess I just like to ask frivolous questions...

Actually its an important question for one of our projects, in which
we a xferring incoming 656 video data from a fixed size buffer over an ISO
pipe. We are trying to
debug a buffer overflow condition. One hypothesis is that the hardware
overflow
detection is assuming that the IN token( buffer read-start) always begins
at the start of SOF.

Otherwise if one IN starts at the beg. SOF, and the next IN is in the middle
of the next SOF,
then the buffer will overflow.

Obviously there are work-arounds such as increasing the buffer size etc...

Clear?

-decoder


.

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