Subject:
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Handy Board "To Do List"
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Wed, 17 Apr 1996 06:28:09 GMT
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Original-From:
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Prabal Dutta <dutta@SPAMCAKEcis.ohio-state.edu>
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Viewed:
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2193 times
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Hi Fred,
I noticed the To Do list on the HB page and just wanted to mention
a couple of things:
1) The shaft encoders from the IC distribution work without
modification. I've been using encoders.icb and encoders.c
successfully. I haven't tested whether the "cheesy encoders"
work yet, but for people who want to use the non-quadrature
encoders, the code's already written and working. The encoders
should be tied to TIC3 and TIC2 (digital ports 7 and 8,
respectively), and accessed with the following functions:
enable_encoder(0); /* Digital 7 */
enable_encoder(1); /* Digital 8 */
disable_encoder(0 or 1);
reset_encoder(0 or 1);
read_encoder(0 or 1);
2) I've already written code to control steppers using the servo
out hardware on the expansion board. This approach requires
some additional circuitry to drive the steppers (just using
discrete MOSFETs or something). It would be easy to relocate
to some other address in memory space.
3) I am almost done converting the lib_hb.c file to accept the
extended analog ports. The ports appear to work but I recall
a couple of early problems, but that was probably due to my
mistakes. Should get around to finishing it this weekend.
Like you, I am pretty busy, but I'm workin' on it! Saw the press
release in the May Electronics Now...looked pretty cool.
- Prabal
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