Searching \ for '[EE] AT Keyboards --- Not all equal!' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: www.piclist.com/techref/index.htm?key=keyboards+not+all
Search entire site for: 'AT Keyboards --- Not all equal!'.

Exact match. Not showing close matches.
PICList Thread
'[EE] AT Keyboards --- Not all equal!'
2000\06\01@083806 by John Hansen

flavicon
face
<x-flowed>At 10:58 AM 6/1/00 +1000, you wrote:
>At 05:49 PM 5/31/00 -0400, you wrote:
>
>I had the same problem with different keyboards as you describe.
>
>Some keyboards require the CLOCK period to within tight margins. If I
>remember
>correctly this is 40us for a full period.
>
>If the clock period is off some keyboards will not work, others will. When
>I got the clock right all the keyboards worked 100%
>
>-Jim

I'm wondering if you would elaborate, Jim.  The clock is generated by the
keyboard.  As long as I read the data after the falling edge of the clock,
shouldn't I be ok?

Thanks,

John

</x-flowed>

2000\06\01@204935 by Jim Robertson

flavicon
face
At 08:36 AM 6/1/00 -0400, you wrote:

Hi John,

Yes you are right. I was in fact making a "keyboard wedge" and not something
that read the keyboard. This is where I found the timing problem and it
was not with different keyboards, as I first said, rather with different PCs.

Sorry for the bum steer, it was some years ago and I sort of lost the
details in my head.

-Jim



{Quote hidden}

Regards,

Jim Robertson
NEWFOUND ELECTRONICS
________________________________________
Email: spam_OUTnewfoundTakeThisOuTspampipeline.com.au
http://www.new-elect.com
MPLAB compatible PIC programmers.
________________________________________

More... (looser matching)
- Last day of these posts
- In 2000 , 2001 only
- Today
- New search...