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Re: Serial Port Issues

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On Mon, Apr 06, 2020 at 09:51:15AM -0400, rhkramer@gmail.com wrote:
> On Monday, April 06, 2020 03:50:59 AM tomas@tuxteam.de wrote:
> > Besides, a wrong baud rate would much less explain that writing is
> > possible, but reading isn't. Not for classical "serials" (i.e. RS-232).
> 
> From the OP: " On this system a serial port can only receive data and not 
> transmit."
> 
> Wouldn't that mean that (from the perspective of a program running on the OP's 
> computer) that the serial port can read but not write?

My recollection is the other way around: write but not read.
But hey, I'm old and that.

That (and the fact that another serial over USB showed the same
symptoms) prompted me to (reluctantly) hint at permissions [1],
since, to my knowledge, a honest serial port cannot be configured
to different send and receive speeds. But this seems to be ruled
out.

Another possibility is, of course, the cable :-)

Do we know in which way the port fails to read/write or whatever
it fails at? Error messages?

Cheers
[1] this could be explained by a broken udev script setting
   the wrong permissions -- that would, e.g. cover the USB
   adapter case. It was such a nice model :-)
-- t

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Re: Serial Port Issues Chris Rhodin <cprhodin@gmail.com> - 2020-04-06 07:30 +0200
  Re: Serial Port Issues deloptes <deloptes@gmail.com> - 2020-04-06 09:00 +0200
    Re: Serial Port Issues Joe <joe@jretrading.com> - 2020-04-06 09:40 +0200
      Re: Serial Port Issues <tomas@tuxteam.de> - 2020-04-06 10:00 +0200
        Re: Serial Port Issues deloptes <deloptes@gmail.com> - 2020-04-06 10:10 +0200
        Re: Serial Port Issues rhkramer@gmail.com - 2020-04-06 16:00 +0200
          Re: Serial Port Issues <tomas@tuxteam.de> - 2020-04-06 16:10 +0200
            Fwd: Serial Port Issues Chris Rhodin <cprhodin@gmail.com> - 2020-04-07 08:00 +0200
              Re: Fwd: Serial Port Issues deloptes <deloptes@gmail.com> - 2020-04-07 08:50 +0200
                Re: Fwd: Serial Port Issues "Martin McCormick" <martin.m@suddenlink.net> - 2020-04-07 15:30 +0200
                Re: Serial Port Issues Joe <joe@jretrading.com> - 2020-04-07 18:50 +0200
              Re: Serial Port Issues Chris Rhodin <cprhodin@gmail.com> - 2020-04-07 09:00 +0200
                Re: Serial Port Issues <tomas@tuxteam.de> - 2020-04-07 09:10 +0200
                Re: Serial Port Issues Chris Rhodin <cprhodin@gmail.com> - 2020-04-07 09:10 +0200
                Re: Serial Port Issues songbird <songbird@anthive.com> - 2020-04-08 13:50 +0200
              Re: Serial Port Issues Joe <joe@jretrading.com> - 2020-04-07 09:30 +0200
      Re: Serial Port Issues Greg Wooledge <wooledg@eeg.ccf.org> - 2020-04-06 14:40 +0200
        Re: Serial Port Issues Joe <joe@jretrading.com> - 2020-04-06 15:30 +0200

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