AVR-Chat

Now what did I say?  Small quantities?  Signal Conditioning?  Key
Debouncing?  My Honest Opinion?? :-) heh

 

Don't worry about it, you're right.  There are lots of canned library
routines for keyboard scanning.

 

Although in the case of including a display, you will need a driver.  So
as long as the driver has a built in keyboard scanner, why not eh?

 

-----Original Message-----
From: Dave VanHorn [mailto:dvanhorn@cedar.net] 
Sent: Wednesday, March 10, 2004 8:47 AM
Subject: RE: [AVR-Chat] Re: Speed Trap

 

At 08:34 AM 3/10/2004 -0800, LightYearCS wrote:

>Actually, sales of these parts seem to be quite brisk even though its a

>relatively old part.
>
>Of course, in larger quantities, most likely I would have my CPU/MCU 
>perform the keyscan, but when it comes to say building 100 devices, 
>sometimes it just not worth the extra software effort.

??? I've done a lot of keyboards, from multi-million run production, to 
one-offs.  It really isn't that hard.
Scan the keys every 10mS, and don't worry about bounce.




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