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Discussion Groups | Comp.DSP | Key Press - CCS

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Key Press - CCS - Tejas - 2004-04-03 17:00:00

I have a real time application running on a DSP. I want to call a
function only when a particular key is pressed. How do I do this in
CCS ?
I have tried using getch() but this pops up a dialog box everytime
this line is executed therefore interrupting my program.


Any help will be appreciated. 

Tejas

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Re: Key Press - CCS - Tim Wescott - 2004-04-03 18:04:00

Tejas wrote:

> I have a real time application running on a DSP. I want to call a
> function only when a particular key is pressed. How do I do this in
> CCS ?
> I have tried using getch() but this pops up a dialog box everytime
> this line is executed therefore interrupting my program.
> 
> 
> Any help will be appreciated. 
> 
> Tejas

I've been down this road.  You have two choices:

(a) Spend a month figuring out how to do it within CCS.

(b) Write another task into your application, and use a GPIO pin (better 
yet an interrupt pin if you can) to trigger the function.

I chose (b), and I suggest it if you can get to the hardware.

-- 

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com