And here you thought I had a cloaking device

Got a good one to share with the group; Q: Can I make a kernel mode driver that opens a handle and talks to a UMDF based driver in another device stack? A: Why yes you can!  Quite simply done provide you follow all the rules. This is a variant of the UMDF initiated cross…

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We’re gonna need a bigger stick!

So, some of you may recognize Eliyas’ name from WinHECs and various other driver dev presentations, but guess what he’s done now?!  He’s become a blogger. Go on feel free to hound him about your USB driver problems.

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I/O Queues and You

I got an interesting question via mail recently, “Do I really need to create a queue object in my UMDF driver?”  Well, this is another one of those, “only if” type questions. For instance – Only if your driver is not handling any I/O from a top edge method which results in the I/O manager…

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Cross stack communications

The subject of how to talk to another device stack has come up again, and since I only briefly touched on it a year ago, I thought it would be good provide some code snippets and a little more background on how to accomplish such a feat.  The gist of what we are trying to…

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House cleaning

The fourth part of Abhishek’s online UMDF debugging tutorials is up now. http://www.microsoft.com/whdc/devtools/debugging/umdftraining.mspx Next up, those of you playing with Windows 7 may have noticed that the “Found New Hardware” wizard is gone!  This in itself is not that big a deal, but it does mean that some of the WDK sample installation instructions are…

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Intellisense, the Musical part 3

Like all good stories, sometimes the 2nd act is the hardest to follow.  In this case it was simply a matter of other things coming up rather than writers block. What kicked me in the rump to get this next part up was a few more questions about driver writing, WDK integration into Visual Studio…

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UMDF Debugging talks online

Our wondrous Abhishek did a series of Debugging UMDF driver talks and I’m happy to say we now have the first three live on line! In these he covers some of the basics; where to find and how to use WDFVerifier, how to use some of the UMDF Debugger extensions and some basic debugging UMDF…

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Double filtered for added UMDF flavor.

UPDATED: 9-March-2010 Astute readers noted that I had the incorrect driver load order when talking about the UmdfServiceOrder directive.   It IS left to right reading and the LEFT most driver is the lowest driver.   In my previous post about Filter Drivers, I mentioned that this time I would focus on a more UMDF centric…

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Genuine UMDF filtered drivers

Filter drivers have come up in conversations recently (both internal and external), so I wanted to take some time here to address some of the issues that were brought up with regards to UMDF filter drivers and how to make them.  Note: I’m not going to cover all the configuration dynamics available for UMDF filter…

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It’s full of stars…

  Yes, I’m alive, and in perfect hibernation, well not even in the same time zone as hibernation, but you get the joke hopefully. I just had to share this little ditty with you all because it’s very cool. Microsoft, NASA put universe back on the Web | Webware – CNET I will resume regular…

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