Experimental Physics and
Industrial Control System

"J. Lewis Muir" <[email protected]> · Mon, 13 Apr 2009 09:30:23 -0400

On 4/11/09 1:39 PM, Colocho, William S. wrote:
> Hello,
>
> On an EMD (edm 1-11-2b) display at SLAC.  A PV with EGU of
> micro-meters shows up as ¬µm (An extra A + ^ character in front of
> it.)
>
> On a xterm, konsole, Matlab editor, and (xdf -fn <font>) it shows as
> expected:
>
> [physics@lcls-srv02]$ caget SIOC:SYS0:ML00:AO496.EGU
> SIOC:SYS0:ML00:AO496.EGU       µm

Hi, William.

Did you run the caget in xterm or konsole?  What character encoding is
it using?  How did you set SIOC:SYS0:ML00:AO496.EGU?  From a .db file?
>From a caput?

One possibility is that your xterm, konsole, etc. are configured to use
the UTF-8 character encoding (for example), but in EDM you're using an
ISO-8859 font.  So you may be entering the mu character in a character
encoding that does not match the character encoding of the font being
used in EDM which will likely not work as expected.  You want to make
sure you enter the mu character in the character encoding used in EDM.

I don't have experience with EDM, but I am able to use the mu character
in MEDM without a problem.  I configure the recommended font aliases for
MEDM in X11 with entries like this:

  widgetDM_14 -misc-fixed-medium-r-normal--14-110-100-100-c-70-iso8859-1

I configure my terminal to use the ISO-8859-1 encoding.  For xterm, this
could be done like this:

$ xterm -en ISO-8859-1

I can then do a caput in that xterm using the Bourne shell like this:

$ caput SIOC:SYS0:ML00:AO496.EGU $'\265m'

265 is the octal value for the mu character in the ISO-8859-1 character
encoding.

MEDM displays this correctly.

For a .db file, you would also need to be careful to specify the correct
character encoding for the file so that the correct byte for the mu
character will be used.

Lewis

-- 
J. Lewis Muir
Software Engineer
CARS/IMCA-CAT

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System