Subject:
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Re: speed of the board
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Tue, 4 Aug 1998 14:24:01 GMT
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Original-From:
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Fred G. Martin <fredm@media.STOPSPAMMERSmit.edu>
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Viewed:
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632 times
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the other issue that should be mentioned re: changing clock speed is
that it messes up the baud rate of the serial communications. if you
plan to use interactive C, would have re-assemble the pcode program
with a different baud rate constant, to achieve the target rate of
9600 baud. (this is the rate that the PC hosted Interactive C program
communicates at.) not all baud rates are available at all system clock
rates; 9600 baud might not be available on the 6811 at other than the
standard 8 MHz crystal/2 MHz system clock.
Fred
In your message you said:
> 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
> >
> >
>
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Message is in Reply To:
 | | RE: speed of the board
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| 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 (...) (26 years ago, 4-Aug-98, to lugnet.robotics.handyboard)
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