Markus,
If you have some experience with serial I/O on Linux, I would appreciate your
giving it a quick shakedown; if it is just plain broken or is still known to
work, it would be nice to confirm either way. I would like to use the binary
distribution, but it does not report enough of what it is trying to do (so no
clues when things fail) and I end up hacking to add tracing with possible
installation troubles as a result.
That said, this time around, I find myself in serialPortOpenByName() and
puzzled by the failure being allegedly detected by:
/* save the old state */
if (tcgetattr(sp->spDescriptor, &sp->spTermios))
My question: is there old state to save on the first pass? errno is not
helpful; it is set to 5 aka I/O error :( I find myself wondering whether this
should be conditional on the internal state of the descriptor, and the failure
to open simply being that it gives up too easily? Then again, it could be
detecting a true error condition and preventing certain disaster in the lines
that would follow.
Any ideas? I can't get /dev/ttyS0 to open by name or number. 'COM1' worked
nicely on Windows.
Bill
Markus Lampert markuslampert at yahoo.com
Wed Sep 1 15:28:38 UTC 2010
Hi Bill,
haven't used the serial interface with the new VMs (yet), but previously under
Linux I had to use the vm option '-notimer'. I did not find any negative side
effects with that option.
Hope this helps,
Markus
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