Re: Getting a handle to a kernel driver (IISR)

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance

Am Wed, 12 Apr 2006 10:21:37 -0400 schrieb Steve Maillet (eMVP):

directly if you wanted. The device manager just provides a standardized
method for multiple processes to get access to the driver.)

Well, that's the point.


I'd still say that an application taking a reading from an ADC at a random
point is a bad design for the app/driver. If the app is just randomly taking
readings whenever it feels like it what difference does it matter if it
takes a few more uS to do it? What criteria does the app use to decide when
to take a reading. Shouldn't the device driver be doing that? (This is what
I meant when I said that the typical problem is the driver is too thin a
layer on the hardware.)

I work for an OEM. It is our customers who write applications accessing the
hardware. As they don't want to bother with the ADC, DAC or whatever
directly, there has to be an abstraction layer. And as I don't know during
writing the driver when they will access the hardware, the access routines
have to be as fast as possible. The past showed that some of our customers
insist on RT and are counting every uS :-).

Additionally I have to use an existing code base for the drivers and the
API if I don't want to reinvent the wheel.


Regards
Max
.

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