Subject:
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Re: Using Cybermaster with NQC in MPW on macintosh.
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Newsgroups:
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lugnet.robotics.rcx.nqc
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Date:
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Sun, 28 Nov 1999 21:52:45 GMT
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Viewed:
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2065 times
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I haven't used CyberMaster myself, but I know someone was able to get it
working with a Mac. CyberMaster expects DTR to be asserted and RTS to be
cleared. I'm not sure if "asserted" means +9 or -9. I know data lines
(TXD, RXD) are inverted, but I don't know if this extends to handshake
lines as well.
Try a simple "ping" test in verbose mode:
nqc -c -v -raw 10
If this fails, e-mail me the verbose output - perhaps I can tell what is
going wrong. Based on the sequence of lights you mentioned, I suspect
transmission from Mac to Cybermaster is fine, and the reverse path is
somehow being munged.
Dave Baum
p.s. Just a side note on converting Mac RS-422 to standard RS-232.
RS-422 uses voltage differential rather than absolute voltage. As a
result there are pairs for Tx and Rx (TX+, TX-, RX+, RX-). Generally, you
can ignore TX+ and treat TX- as an RS-232 TXD. On the RX side, however,
you need to supply both RX+ and RX-. You can do this by using RXD as RX-,
and using ground as RX+.
In article <FLwJzB.FnK@lugnet.com>, "Ian Kilburn" <ikilburn@access.ch> wrote:
> Hi all,
>
> I am having problems talking to my cybermaster from MPW on the mac.
>
> Heres my set up
>
> Mac B&W g3 with gport card providing the serial port.
> mac modem cable (mini 8 pin to DB-25) connected to serial port
>
> DB-25 from modem cable connected to rs232 breakout box
>
> breakout box configuration
> +9V applied to pin 20 DTR
> -9V applied to pin 4 RTS
> 0V applied to pin 7 SG
> pin 20 and 4 open on breakout box dip switches all others closed
>
> output of breakout box into a DB-25 to DB-9 pin adapter and then lego cable
> and RF tower.
>
> The above hardware, minus the 9V power supplies and with the breakout box
> switches set to closed, works with my mindstorms RCX and IR tower. From MPW
> I can download firmware and programs using nqc on the command line.
>
> When I try the same with the cybermaster and RF tower, for instance
>
> "nqc -c -raw 120000"
>
> the light on the tower flashes a few times, followed by the light on the
> mobile unit. Then the message appears in the MPW shell
>
> "No reply from CyberMaster"
>
> Has someone got this setup working and can suggest where to look for
> problems?
> I am not sure about unlocking the firmware on the cybermaster does this have
> to be done separately or is it included in the serial communication?
> The configuration of the two 9V supplies on pins 4 and 20 does not seem to
> make any difference to the results, so my hardware setup is probably also
> suspect.
>
> Thanks
>
> Ian Kilburn
>
>
>
>
>
--
reply to: dbaum at enteract dot com
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Message is in Reply To:
 | | Using Cybermaster with NQC in MPW on macintosh.
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| Hi all, I am having problems talking to my cybermaster from MPW on the mac. Heres my set up Mac B&W g3 with gport card providing the serial port. mac modem cable (mini 8 pin to DB-25) connected to serial port DB-25 from modem cable connected to (...) (25 years ago, 27-Nov-99, to lugnet.robotics.rcx.nqc)
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