Subject:
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Re: Expansion board & V2X & sonar
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 15 Feb 1999 15:00:16 GMT
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Original-From:
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Tom Brusehaver <tgb@cozy.wamnet.SPAMCAKEcom>
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Reply-To:
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TGB@ihatespamWAMNET.COM
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Viewed:
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1164 times
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> the SPI port D is tied up by the compass, I was wondering if directly
> connecting the digital output-pins of the expansion board can be used to
> trigger the sonar pulse and set the BINH.
I am the guy who wrote the V2X code that is on the HB web site. I
just got an expansion board, and am looking into v2X and sonar on the
exp board right now.
> Will the triggering or
> blanking use more than the allowed 5 mA per output? Will the timing be accurate?
> Instead of poking (0x1008, 0x20) like in sonar.c could I just use
> set_digital_out(x) to start the ping (and turn on BINH
> in the same way)?? Would it be enough to just resolder the INIT and BINH
> lines to the digital output ports of the expansion board or would I need
> further modifications?
I cannot find where there are pins for the SPI port on the expansion
board. Yup, the breadboard area would work, and I have thought of
that.
The SPI port is maybe overkill, so I am thinking that I'll just have
like a timed process that, say every 500msec (configurable), it takes
a heading. Then with the extra output pins, I'll be able to disable
the compass, and send calibration signals, and resets. I think it'll
be better. If anyone else is working on v2x, I'd love to hear about it.
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Message has 1 Reply:
 | | Re: Expansion board & V2X & sonar
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| re: exp bd SPI pins: * 2 of the pins are used by the sonar and aren't separately available. * the other 2 SPI pins are at PCB holes J20 and J21. see the schem for details: (URL) you need all 4 spi pins for something, leave out the j11 sonar (...) (26 years ago, 15-Feb-99, to lugnet.robotics.handyboard)
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Message is in Reply To:
| | Re: Expansion board & V2X & sonar
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| Hi Fred et al. I am doing a project with a six legged robot in which I would like to use the Polaroid 6500 sonar and the V2X compass AT THE SAME TIME. Since the SPI port D is tied up by the compass, I was wondering if directly connecting the digital (...) (26 years ago, 15-Feb-99, to lugnet.robotics.handyboard)
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