Experimental Physics and
Industrial Control System

"Zhichu Chen" <[email protected]> · Wed, 20 Aug 2008 10:49:35 +0800

Hi Stephanie,

On Mon, Aug 18, 2008 at 11:17 PM, Allison, Stephanie
<[email protected]> wrote:
> Hi Chen,
>
>> I know I can use
>> ==========================================
>> dbLoadRecords ("db/test.db","device=${DEV},channel=1")
>> dbLoadRecords ("db/test.db","device=${DEV},channel=2")
>> dbLoadRecords ("db/test.db","device=${DEV},channel=3")
>> dbLoadRecords ("db/test.db","device=${DEV},channel=4")
>> ==========================================
>> in st.cmd script and epics will get the system environment "DEV" so
>> that I don't need to modify my ioc package and just use
>> export DEV=blahblah
>> on each device. But I kind of like my st.cmd script to be clean and neat,
>> thus I made some .substitutions file like:
>> ======================
>> file "db/test.db" {
>>     pattern { device, channel }
>>         { "${DEV}", 1 }
>>         { "${DEV}", 2 }
>>         { "${DEV}", 3 }
>>         { "${DEV}", 4 }
>> }
>> ======================
>
> Let's say the "some .substitutions file" had a name like "testAll.substitutions" and that you add a line to your Makefile like this:
>
> DB += testAll.db
>
> The build should create testAll.db from your testAll.substitutions file (I use "should" since I don't know what version of epics you are using).
>
>> For your information, I may have many lines, so the latter is actually
>> I preferred. But when I put
>> dbLoadTemplate "db/test.substitutions"
>
> If you have the build create "testAll.substitutions", then you would add this line to your st.cmd:
>
> dbLoadRecords ("db/testAll.db","device=${DEV})
>
> Stephanie Allison
>

Sorry, maybe I haven't made myself clear but this is not what I wanted
and the very reason I asked the question.

I need testAll.db to be loaded many times so I don't like to put a lot of
dbLoadRecords commands in the st.cmd script. Besides, I have like
five or six macros in the .db file so that I can make it universal to the
instruments in my charge. But when it appears in the st.cmd script, it's
a long line and not supposed to be broken into several lines which,
I'm sorry, doesn't seem perfect to me. While if I use the "pattern" form
of a .substitutions template, the macros are just grouped logically.
It's very nice except it can't accept the system environment.

By the way, I have the
DB += testAll.db testAll.substitutions
in my Makefile otherwise if I load the testAll.substitutions template which
contains "file db/testAll.db" will fail to execute at the very first line.

--
Best Regards
Chen
----------------------------------------------------------------

         Zhi-chu Chen | Shanghai Synchrotron Radiation Facility
        No. 2019 | Jialuo Rd. | Jiading | Shanghai | P.R. China
            tel: 086 21 5955 3405 | zhichu.chen.googlepages.com
                                              | www.sinap.ac.cn
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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System