Depending on your target, you might use clock_nanosleep() with TIMER_ABSTIME
to sleep until a certain wall clock time.
https://linux.die.net/man/2/clock_nanosleep
On 11/5/18 11:35 AM, James Larsson wrote:
> Good Day,
>
>
> I tend to avoid cron job on the control system since I don't know that it is *guaranteed* to run, and at specified time - though it usually does. Even though crontab is a great tool, it isn't a control system tool, so my preference is to avoid it (except for say, booting a control system).
>
>
> I implemented a calc record that uses inputs from the devIocStats (synapps) to get the second, minute, and hour, and compare them with your desired values and make the Val=1 if equal, which is essentially what you want. If you connect that to the SDIS of a fanout and process the fanout every 1/2 second then you will get a single process signal output, at the time of day you specify (because usually it's disabled).
>
>
> You can do the same thing but only use seconds, and minutes for something that happens every hour, and likewise for month and day. Sometimes I want to process a record, but only once every 10 minutes.
>
>
> Cheers
>
> James Larsson
>
> ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
> *From:* [email protected] <[email protected]> on behalf of Maren Purves <[email protected]>
> *Sent:* November 5, 2018 10:14:07 AM
> *To:* Michael Westfall
> *Cc:* [email protected] Talk
> *Subject:* Re: record that processes at a given time of day?
>
> Hi Michael,
>
> I have a cron job that runs once a day that resets the value of several records by
> running cau (with an input file). If you don't find a record that can be made to do
> that I'm sure you can adapt the cron job idea.
>
> Maren Purves, EAO/JCMT
>
> On Mon, Nov 5, 2018 at 7:37 AM, Michael Westfall via Tech-talk <[email protected] <mailto:[email protected]>> wrote:
>
> Hi,
>
> I'm wondering if someone has an EPICS record implemented that processes at a given time of day, like an alarm clock.
>
> I don't see anything like that in EPICS base.
>
> --
> Mike Westfall
> Control Systems Software Engineer
>
>
>
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