[CentOS] Need to test serial port connection
Anne Wilson
cannewilson at googlemail.com
Thu Feb 26 20:37:23 UTC 2009
On Thursday 26 February 2009 20:29:01 Robert wrote:
> Anne Wilson wrote:
> > I'm not often beaten by things, but sometimes I have to fight them on and
> > off for quite a while before they are resolved. I'm grateful for all the
> > help I'm getting here. I shan't be giving up for a good while yet :-) if
> > at all.
> >
> > Anne
>
> RS232C is enough to kick anyone's butt. For openers, the RS232C
> "standard" has been bent more ways than any other so-called standard
> I've ever worked with. I would never attack a situation such as you
> have (nothing given, find everything and prove 3 ways) without a
> breakout box. Lacking one of those, you might find the statserial
> program to be of some use in figuring out what the control lines are doing.
> # yum --enablerepo=dag install statserial
> will install it. It has a short man page. Run with no options except
> device ( # statserial /dev/ttyS0 ) will cause it to loop, indicating
> status of all control signals. You can manually tweak any of the pins
> with direction of "in" with a 9-volt battery or by using a paper-clip
> jumper from one of the "out" lines. It won't be long before you can
> identify the port, moving an "unknown" to "found".
>
I never bargained for getting in this deep :-)
Anne
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