KMDF driver

Hi all
I am writing a KMDF driver for a custom device. The requirement is to trigger an event from driver to application when there is a device state change.How to do that in KMDF driver ?.

Use an inverted call see http://www.osronline.com/article.cfm?article=605
for an article how to do this.

Don Burn
Windows Driver Consulting
Website: http://www.windrvr.com

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of xxxxx@gmail.com
Sent: Friday, February 20, 2015 8:51 PM
To: Windows System Software Devs Interest List
Subject: [ntdev] KMDF driver

Hi all
I am writing a KMDF driver for a custom device. The requirement is to
trigger an event from driver to application when there is a device state
change.How to do that in KMDF driver ?.


NTDEV is sponsored by OSR

Visit the list at: http://www.osronline.com/showlists.cfm?list=ntdev

OSR is HIRING!! See http://www.osr.com/careers

For our schedule of WDF, WDM, debugging and other seminars visit:
http://www.osr.com/seminars

To unsubscribe, visit the List Server section of OSR Online at
http://www.osronline.com/page.cfm?name=ListServer

Have the app send an ioctl, the driver queues it and when the event happens, complete the ioctl. You cab even provide event data in the output buffer

d

Bent from my phone


From: xxxxx@gmail.commailto:xxxxx
Sent: ?2/?20/?2015 5:51 PM
To: Windows System Software Devs Interest Listmailto:xxxxx
Subject: [ntdev] KMDF driver

Hi all
I am writing a KMDF driver for a custom device. The requirement is to trigger an event from driver to application when there is a device state change.How to do that in KMDF driver ?.


NTDEV is sponsored by OSR

Visit the list at: http://www.osronline.com/showlists.cfm?list=ntdev

OSR is HIRING!! See http://www.osr.com/careers

For our schedule of WDF, WDM, debugging and other seminars visit:
http://www.osr.com/seminars

To unsubscribe, visit the List Server section of OSR Online at http://www.osronline.com/page.cfm?name=ListServer</mailto:xxxxx></mailto:xxxxx>

You can also look at PnP notifications (IoReportXxx calls), which are possibly OK for some simplest cases.


Maxim S. Shatskih
Microsoft MVP on File System And Storage
xxxxx@storagecraft.com
http://www.storagecraft.com

wrote in message news:xxxxx@ntdev…
> Hi all
> I am writing a KMDF driver for a custom device. The requirement is to trigger an event from driver to application when there is a device state change.How to do that in KMDF driver ?.
>

Hi
Thank you all . I have one more query regarding logging events generated by driver. I want to log only particular events happening in a driver in to file . Is this possible ? can you tell me how to do that?..

The easy answer would be to just call ZwWriteFile… Note that you have to be at IRQL PASSIVE_LEVEL when you do so.

Peter
OSR
@OSRDrivers