Subject:
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Servo control using Miniboard slaved to Handyboard.
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 21 Jul 1997 08:41:40 GMT
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Original-From:
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John Hatton <JOHNHA@spamcakeICSPLC.CO.UK>
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Viewed:
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442 times
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As an addition to my earlier message I have a cheaper and possibly more
versatile way of controlling the servos. I have obtained information on
the Servo16 algorithm by Erik de la Iglesia which runs on a MC68HC11E1
(he mentions using the E9 but the only difference is the E9 has 12K of
ROM which is not apparently used). How easy is it to use the SPI port
(serial peripheral interface) to communicate from the Handyboard to the
Miniboard, using the Miniboard solely to control the walking and the
Handyboard to do every thing else.
This idea will be cheaper because with minor modification to the
Miniboard PCB (the algorithm needs ports B and C) 16 servos can be
controlled where the MiniSSC II only controls 8 servos and costs the
same. The only down side is that I have to write the program for the
Miniboard whereas the MiniSSC II only requires serial commands but is
obviously more limited.
John Hatton
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