Lpc2000

Hi,

did anyone already connect a PS/2 mouse or trackball to an ARM7? Has 
anyone a description what to do after applying Vcc/GND to the mouse? 
Does the mouse produce the clock or does ARM has to poll the mouse? I 
have a description of what bit carries which info (regarding the three 
bytes of standard PS2 protocol) but my mice do not send any data of 
their own.

Any hint is welcome.

regards, Alexander

--- In lpc2000@yahoogroups.com, "mal_ibn" <mal_ibn@g...> wrote:
> Hi,
> 
> did anyone already connect a PS/2 mouse or trackball to an ARM7? Has 
> anyone a description what to do after applying Vcc/GND to the mouse? 
> Does the mouse produce the clock or does ARM has to poll the mouse? 
I 
> have a description of what bit carries which info (regarding the 
three 
> bytes of standard PS2 protocol) but my mice do not send any data of 
> their own.
> 
> Any hint is welcome.
> 
> regards, Alexander

some infos here :
http://www.computer-engineering.org/

look at "PS2 Mouse / Keyboard Interface".
seems that the mouse is sending the clock.

Hi,

mal_ibn wrote:

>did anyone already connect a PS/2 mouse or trackball to an ARM7? Has 
>anyone a description what to do after applying Vcc/GND to the mouse? 
>Does the mouse produce the clock or does ARM has to poll the mouse? I 
>have a description of what bit carries which info (regarding the three 
>bytes of standard PS2 protocol) but my mice do not send any data of 
>their own.
>
>  
>
You will find all the necessary informations here :
http://www.Computer-Engineering.org/

Eric

There is a very nice but OLD chip called the ARM7500 that has the
mouse and keyboard (PS2) interface.

http://www.advanced-risc.com/


--- In lpc2000@yahoogroups.com, "mal_ibn" <mal_ibn@g...> wrote:

> Hi,
> 
> did anyone already connect a PS/2 mouse or trackball to an ARM7? Has 
> anyone a description what to do after applying Vcc/GND to the mouse? 
> Does the mouse produce the clock or does ARM has to poll the mouse? I 
> have a description of what bit carries which info (regarding the three 
> bytes of standard PS2 protocol) but my mice do not send any data of 
> their own.
> 
> Any hint is welcome.
> 
> regards, Alexander

Great! Thanks! That seems to be the one document - if not THE document 
I searched for. Yesterday at night I found out that the ACK is needed 
for communication. Now that I understand the theory - is there a 
application with ARM-software to read a PS/2 mouse or trackball? If 
there is an open source for a mousedriver (without OS), I'd like to use 
it instead of debugging wrong thought ;)
There will be enough debugging implementing the driver into my 
application.

regards, Alexander


--- In lpc2000@yahoogroups.com, Eric BENARD <elbenard@g...> wrote:
> Hi,
> 
> mal_ibn wrote:
> 
> >did anyone already connect a PS/2 mouse or trackball to an ARM7? Has 
> >anyone a description what to do after applying Vcc/GND to the mouse? 
> >Does the mouse produce the clock or does ARM has to poll the mouse? 
I 
> >have a description of what bit carries which info (regarding the 
three 

> >bytes of standard PS2 protocol) but my mice do not send any data of 
> >their own.
> >
> >  
> >
> You will find all the necessary informations here :
> http://www.Computer-Engineering.org/
> 
> Eric