Andre Abelian wrote :

> 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?

Most (rellatively) modern mouses are bi-dir.
You can (using some GUI) set things like resolution and
other things in the mouse.

But mosts mouses wakes up in a standard config, and I
don't think one *have* to write to them, generaly speaking.

> my main question is Can I use PIC's hardware SPI interface 
> for keyboard or mouse. I like PIC18F parts. any info will
> appreciate.

As Maarten wrote, sounds like a waste of hardware in the PIC...

Jan-Erik.



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