Peter and others

I like to thank all of you guys for your replay.
Piclist  is one of the best list in the world.

thank you again

Andre



Peter wrote:

>
>
> On Wed, 2 Nov 2005, Andre Abelian wrote:
>
>> Hi to all,
>>
>> Based on what I understood PS2 keyboard uses bi-directional
>> communication. I am not sure about the mouse
>> does it work similar way "bi-directional" or mouse is just output 
>> device?
>> my main question is Can I use PIC's hardware SPI interface for 
>> keyboard or
>> mouse. I like PIC18F parts. any info will appreciate.
>
>
> The PS2 if is NOT SPI, it is PS2. You can find a fairly complete 
> description in the datasheets of PS2 devices (f.ex. mouse controllers 
> from Holtek and others, including HP/Agilent). Please find them and 
> read them carefully. It is not very easy to make PS2 work but it can 
> be done and it has been done many times. There is pic code for 
> interfacing with PS2, look on the web. The device recognition is done 
> by the host and an id string is sent by the device to the host. This 
> tells it what it is. The host then uses the device as intended (mouse, 
> keyboard etc).
>
> Peter


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