Lpc2000

Dear moderator,
   
  Thanks for accepting my request to join OUR lpc2000 group
   
  Iwould like to know how to interface PC/AT keyboard with lpc2106
   
   


Thankyou and warm regards
chavali v. s. ramasastry
Send instant messages to your online friends http://in.messenger.yahoo.com 

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sastry cvsr wrote:

>Dear moderator,
>   
>  Thanks for accepting my request to join OUR lpc2000 group
>   
>  Iwould like to know how to interface PC/AT keyboard with lpc2106
>   
>   
>  
>
There is a lot of information about how serial keyboards operate (XT, 
AT, PS/2) out there on the net.  Just go to google and do a little 
research.  There is a lot(!) of documentation available for how the 
protocol works and a lot(!!!) of sample code on many many different 
processors.

The keyboard is an intelligent subsystem of the computer, you have to 
hold a simple conversation with it. It has it's own unique  protocol.

Regards,

TomW


-- 
Tom Walsh - WN3L - Embedded Systems Consultant
http://openhardware.net, http://cyberiansoftware.com
"Windows? No thanks, I have work to do..."
----------------------------------------------------

Hello,
      The PC/AT keyboard has 4 connection pins, two being Vcc and Gnd, the other two being the data and the clk pins. Connect both the pins to the pins of LPC and configure them in input mode. At every clock transition read the status of the data pin and shift the bit in a register until stop is detected. You get the 8 bit scan code of the character pressed.
   
  Cheers,
   Vineet.
  

sastry cvsr <cvsrsastry@...> wrote:
  Dear moderator,
   
  Thanks for accepting my request to join OUR lpc2000 group
   
  Iwould like to know how to interface PC/AT keyboard with lpc2106
   
   


Thankyou and warm regards
chavali v. s. ramasastry
Send instant messages to your online friends http://in.messenger.yahoo.com 

[Non-text portions of this message have been removed]



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Have a look at the following link...

http://www.beyondlogic.org/keyboard/keybrd.htm

Regards,

Ferry

-----Original Message-----
From: lpc2000@yahoogroups.com [mailto:lpc2000@yahoogroups.com] On Behalf Of
sastry cvsr
Sent: Friday, January 20, 2006 05:27 AM
To: lpc2000@yahoogroups.com
Subject: [lpc2000] how to interface pc/at keyboard with lpc2106

Dear moderator,
   
  Thanks for accepting my request to join OUR lpc2000 group
   
  Iwould like to know how to interface PC/AT keyboard with lpc2106
   
   


Thankyou and warm regards
chavali v. s. ramasastry
Send instant messages to your online friends http://in.messenger.yahoo.com 

[Non-text portions of this message have been removed]



 
Yahoo! Groups Links

Reference info here: http://www.beyondlogic.org/keyboard/keybrd.htm