Subject:
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(no subject)
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Sun, 16 Jun 1996 04:23:53 GMT
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Original-From:
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System User <lylehaze@n-jcenter.com[StopSpam]>
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Reply-To:
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Lyle Hazelwood <lylehaze@n-NOMORESPAMjcenter.com>
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Viewed:
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1584 times
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Dirk,
I don't know enough about the SPI to help, But I would like to know how it
works out for you.. I am trying to learn s much about my Handy-Board as I
can. I recently figured out the Addresses for the handy board, and I found
that the Digital IO Addresses are as follows (I think)
Address Read Enable Used for Write Enable Used for
------- ----------- ------- ------------ --------
7FFF Y7 Digital In Y6 Motors
6FFF Y5 Y4
5FFF Y3 Y2
4FFF Y1 Y0
The enables Y0 - Y5 are brought out on the expansion connector..
Each enable actually maps out to 4K of address space! any address from
7000 to 7FFF will strobe Y6 or Y7 (depending on R/W, of course). I am
planning on adding an expansion hub that will further decode a pair of Y
enables to a group of chip-selects, and buffer the data bus for these
additional enables as well. That way, I can build lots of neat toys,
without "using up" all of the on-board enables.
Please let me know how your work with the SPI turns out, I am considering
it's use to link either a Mini-Board or another Handy-Board in the future.
I also heard that a small, digital compass was available with an SPI
interface. This would make navigation much more accurate that by
"dead-reckoning" by reading the wheel encoders. (I heard that GPS receivers
with SPI were available too, but that is overkill, IMHO)
8^) Lyle Hazelwood<lylehaze@n-jcenter.com>
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