Forums

LPC2000 to keyboard (or keypad... or...?)

Started by seangra November 9, 2005
Does anyone have any good schematics/code for connecting a PS/2
keyboard to one of these uC's?

Alternatively does anyone know of any good small keypads that are easy
to interface (and cheap!)

I've been looking, but haven't found anything that scratches my itch
yet.

Thanks!


An Engineer's Guide to the LPC2100 Series

Let me elaborate.

I already know about the following links:

http://panda.cs.ndsu.nodak.edu/~achapwes/PICmicro/keyboard/atkeyboard.h
tml
http://www.computer-engineering.org/ps2protocol/
http://www.synaptics.com/decaf/utilities/ACF126.pdf

What I'm wondering is if there is either any simple keypad that can be
attached via SPI or I2C or something, or if there is any code that is
prewritten for using PS/2 communications. I haven't been able to find
either.

Thanks!

--- In lpc2000@lpc2..., "seangra" <sgraham@o...> wrote:
>
> Does anyone have any good schematics/code for connecting a PS/2
> keyboard to one of these uC's?
>
> Alternatively does anyone know of any good small keypads that are
easy
> to interface (and cheap!)
>
> I've been looking, but haven't found anything that scratches my itch
> yet.
>
> Thanks!
>




seangra wrote:

>Does anyone have any good schematics/code for connecting a PS/2
>keyboard to one of these uC's? >
PS/2 keyboards are basically an AT keyboard with a smaller connector.
IIRC, AT keyboards use a three wire protocol. Anything you find
relating to AT keyboards will work with PS/2 keyboards. I am confident
that you just haven't looked all that much for information, it is out
there on the net. ;-) TomW

>Alternatively does anyone know of any good small keypads that are easy
>to interface (and cheap!)
>
>I've been looking, but haven't found anything that scratches my itch
>yet.
>
>Thanks! >Yahoo! Groups Links


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


--- In lpc2000@lpc2..., Tom Walsh <tom@o...> wrote:
>
> seangra wrote:
>
> >Does anyone have any good schematics/code for connecting a PS/2
> >keyboard to one of these uC's?
> >
> >
> >
> PS/2 keyboards are basically an AT keyboard with a smaller
connector.
> IIRC, AT keyboards use a three wire protocol. Anything you find
> relating to AT keyboards will work with PS/2 keyboards. I am
confident
> that you just haven't looked all that much for information, it is
out
> there on the net. ;-) > TomW >
>
> >Alternatively does anyone know of any good small keypads that are
easy
> >to interface (and cheap!)
> >
> >I've been looking, but haven't found anything that scratches my
itch
> >yet.
> >
> >Thanks!
> >
> >
> >
> >
> >
> >
> >
> >
> >Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
> > --
> Tom Walsh - WN3L - Embedded Systems Consultant
> http://openhardware.net, http://cyberiansoftware.com
> "Windows? No thanks, I have work to do..."
> ----------------
>
Check this link :
http://www.multilabs.net/Products.html
Radim.


seangra wrote:

>Let me elaborate.
>
>I already know about the following links:
>
>http://panda.cs.ndsu.nodak.edu/~achapwes/PICmicro/keyboard/atkeyboard.h
>tml
>http://www.computer-engineering.org/ps2protocol/
>http://www.synaptics.com/decaf/utilities/ACF126.pdf
>
>What I'm wondering is if there is either any simple keypad that can be
>attached via SPI or I2C or something, or if there is any code that is
>prewritten for using PS/2 communications. I haven't been able to find
>either. >
Try this, this is a really good page about the keyboard:
http://panda.cs.ndsu.nodak.edu/~achapwes/PICmicro/keyboard/atkeyboard.html

I just goolged it with:
http://www.google.com/search?hl=en&q=at+keyboard+interface+software+pic&btnG=Google+Search
--
Tom Walsh - WN3L - Embedded Systems Consultant
http://openhardware.net, http://cyberiansoftware.com
"Windows? No thanks, I have work to do..."
----------------