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In article <GnsDF5.Fso@lugnet.com>, "Seb Nash" <s.c.nash@dur.ac.uk>
wrote:
> In lugnet.robotics.rcx.legos, Dave Baum writes:
>
> > If you are using a Keyspan USB/serial adapter, then firmdl and other
> > utils should work just fine since the Keyspan driver makes a /dev entry
> > that is a fairly standard tty device. Only problem I've seen is that
> > tcdrain() hangs - can't tell if its a kernel problem or driver problem.
>
> Dave, first thank you for NQC and its Mac support. If only its collegues
> weren't such a headache! I am using a serial tower with a Keyspan
> adapter
> and the setup works great for NQC following your readme file. I had been
> wondering though, what's the difference between cu.KeyUSA19* and
> tty.KeyUSA19* created in /dev? I've built TinyVM on my machine but it
> can't
> seem to access the tower. I've set it to use cu.KeyUSA19 as in NQC. Do
> you
> think this might be the problem? Just curious. I'm concentrating on legOS
> right now but I thought that I might have the same problem if I ever get
> it
> to work.
If I remember correctly, the tty devices will block in open() until they
see some handshake (perhaps DCD) from the other side, while cu devices
open right away and ignore handshake.
I'd suggest taking a look at the code that initializes the serial port
for TinyVM. It could be that the code isn't specifying all of the
necessary options, and perhaps on other systems the defaults for those
options happen to work fine but under OS X the defaults are different.
Also, comment out any calls to tcdrain() since they seem to hang.
Dave
--
reply to: dbaum at enteract dot com
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Message is in Reply To:
 | | Re: legOS on Mac OS X
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| (...) Dave, first thank you for NQC and its Mac support. If only its collegues weren't such a headache! I am using a serial tower with a Keyspan adapter and the setup works great for NQC following your readme file. I had been wondering though, (...) (25 years ago, 3-Dec-01, to lugnet.robotics.rcx.legos)
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