We do serial differently.

[Gary Jennejohn]

On Thu, 19 Oct 2017 11:03:46 +0100
Bob Bishop <rb at gid.co.uk> wrote:

> Hi,
> 
> > On 19 Oct 2017, at 05:25, Zaphod Beeblebrox <zbeeble at gmail.com> wrote:
> > 
> > How does FreeBSD do serial differently than Linux or MacOS or Windows?  
> 
> Quite likely only in the defaults when a port is opened.
> 
> > Now... this isn't _exactly_ serial, but the serial that is emulated by the
> > arduino driver in ports.
> > 
> > The issue is that running the arduino IDE works (and it boots with the
> > loaded code), but then running 'pronterface'  fails to connect --- looking
> > all-the-while like one-way communication.
> > 
> > I see someone else basically having the same problem and claiming that
> > hacking a trace (that affects the DTR response) on the arduino fixes it for
> > FreeBSD (see https://plus.google.com/+MiroslavPrymek/posts/6TDdbuoNhzH )...
> > 
> > Given this information, can I stty my way out of this problem?  Can I make
> > a small modification to pronterface?  
> 
> stty -clocal ...
> 

Hmm.  The description of clocal in stty(1) is incorrect.  It states
that clocal is without and -clocal with modem control.  It's reversed.

> might help.
> 
> All implementations of virtualised serial ports should (IMHO) provide a software ___breakout box___ which is the only sure way of diagnosing this sort of problem.
> 

-- 
Gary Jennejohn