RE: speed of the board You shouldn't lose place if the mouse is serviced by input counters and
interrupt routines, so whether 2 MHz is fast enough depends on how often you
need the positions calculated from the mouse counters.  You won't be able to
get that as fast as the mouse counter updates, but all you have to do is get
the latest and do your calculation.  It's the control aspects using that
information which will determine whether your application is fast enough.

Mike

Lockheed Martin, Houston TX
michael.ross@lmco.com 
Engineering Analysis and Simulation Dept
281-333-7094; C33; 34KN

> ----------
> From:
> anton_attanayake@rd.qms.com[SMTP:anton_attanayake@rd.qms.com]
> Sent: 	Monday, August 03, 1998 2:23 PM
> To: 	handyboard@media.mit.edu
> Subject: 	speed of the board
> 
> 
>      Hi guys,
>      
>      I am worried about the 2MHz clock speed of the HB.  The robot that I 
>      am building has a mouse in the bottom of it and I am writing the 
>      program to read the number of digital pulses and calculate the 
>      position relative to the starting point.  There are many square roots
> 
>      and unit vector additions in the calculations.  
>      Do you think the above speed is good enough for the job?
>      
>      I know the E series 6811 runs at a faster clock speed.  So can I 
>      replace the 6811 chip and the oscillator and get a faster performing 
>      controller board?  If yes, please let me know where to get the parts 
>      and things to know when making the change.
>      
>      Thanks every body,
>      -anton
> 
> 

