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Re: USB polling

As a follow-up on this, what is the difference between using a read on a bulk pipe vs. an interrupt pipe?

Both can be done asynchronously (or synchronously) and both can just be submitted and left there (until the device sends some data).

On Oct 25, 2006, at 5:31 AM, Arvind Dalvi wrote:

Thanks David....

a quick read on endpoints and transfer types mention "interrupt" transfer.

now wondering, if such kind of transfer is available, is it upto the
driver to call read again-n-again (as per the interrupt frequency) ?

or will the host controller driver understand that a device down below
has interrupt data, and would call my driver's completion routine ?

i think i need to read the USB specs carefully, before i jump the gun....

thanks,
a.d.
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References: 
 >USB polling (From: "Arvind Dalvi" <email@hidden>)
 >Re: USB polling (From: David Ferguson <email@hidden>)
 >Re: Re: USB polling (From: "Arvind Dalvi" <email@hidden>)



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