Anyone who can comment as follow problem…?
I wanna save loading time of USB driver as short as possible after
finished OS boot.
Beause my USB device accept electrical-power after OS boot sequence.
PC and USB used seperated power line as apart. (something complex…)
1.After PC finished boot then normally operated.
USB device is attached without power
2.USB device power on
3.OS started enumeration to load proper driver.
4.load driver then USB working.
Above steps are my operating sequence but I wanna save driver loading time
at the step between 3 and 4.
Currently it takes several-ten second (or minutes).
anticipate your reply…thanks
Most probably your device might be NAKing quite some time during enumeration
phase…
Observe the bus traffic with analyzer…
Vijay
----- Original Message -----
From: “yungun.jeong”
To: “Windows System Software Devs Interest List”
Sent: Friday, September 19, 2003 6:23 AM
Subject: [ntdev] Save USB Driver Loading Time
> Anyone who can comment as follow problem…?
>
> I wanna save loading time of USB driver as short as possible after
> finished OS boot.
> Beause my USB device accept electrical-power after OS boot sequence.
> PC and USB used seperated power line as apart. (something complex…)
>
> 1.After PC finished boot then normally operated.
> USB device is attached without power
>
> 2.USB device power on
>
> 3.OS started enumeration to load proper driver.
>
> 4.load driver then USB working.
>
> Above steps are my operating sequence but I wanna save driver loading time
> at the step between 3 and 4.
>
> Currently it takes several-ten second (or minutes).
>
> anticipate your reply…thanks
>
> —
> Questions? First check the Kernel Driver FAQ at
http://www.osronline.com/article.cfm?id=256
>
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