Re: How to trigger the mainboard buzzer?

You can write a full audio driver for the PC speaker if you want... It involves programming the PIT on the x86.

Here's a good starting point: http://en.wikipedia.org/wiki/PC_speaker

Good luck,

Michel Verhagen, eMVP
Check out my blog: http://GuruCE.com/blog

GuruCE Ltd.
Microsoft Embedded Partner
http://GuruCE.com
Consultancy, training and development services.

Paul G. Tobey [eMVP] wrote:
You'd have to implement your own code to do this, unless your BSP has support for triggering that device in some other way. It should be obvious that Windows CE isn't going to have some sort of standard "mainboard buzzer" device! That *is* obvious, right? You might see if the Notification LED (yes, I know that the buzzer is not an LED), is somehow used by your board's BSP for this.

If not, you'll have to write a driver and decide how to make it work (as a fake audio device or just a custom driver interface that your application would have to CreateFile() to open, then maybe DeviceIoControl() to send a custom message to tell the buzzer to buzz).

Paul T.

"traudi" <traudi@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message news:62BE5F99-CF62-4A5B-BD01-DFF494129320@xxxxxxxxxxxxxxxx
Hi Luca,

I have the MessageBeep function tested. This function plays notivication
sounds (wav-files: exlamation, critical aso.) over the soundcard output line
and not over the mainboard buzzer. Do you know, how I can change the output
channel from this function?

Thanks
traudi

"Luca Calligaris" wrote:

Look for MessageBeep API

--

Luca Calligaris
www.eurotech.it

"traudi" <traudi@xxxxxxxxxxxxxxxxxxxxxxxxx> ha scritto nel messaggio
news:42AD3730-C822-46C7-B3E9-C9A7C0BF1161@xxxxxxxxxxxxxxxx
Hi all,

do's erveryone know, how I can trigger the mainboard buzzer from
x86-system
under windows ce 5 from a application written with c++ or cf 3.5? The
system
has a internal soundcard but no speakers. The buzzer is allways present...

Regards from Germany.
traudi





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