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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | Re: How to find out PVs preventing SSCAN from running? |
| From: | "Li, Ji via Tech-talk" <tech-talk at aps.anl.gov> |
| To: | Michael Davidsaver <mdavidsaver at gmail.com> |
| Cc: | "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov> |
| Date: | Thu, 5 Aug 2021 02:03:00 +0000 |
|
That kind of explains the problem. But I'm curious what changes (in EPICS base or sscan) brought it up, since this was running base 3.14 (I think so) and an early version of sscan. The system has been wiped so I don't know the exact versions of them.
Best,
From: Michael Davidsaver <mdavidsaver at gmail.com>
Sent: Wednesday, August 4, 2021 21:18 To: Li, Ji <liji at bnl.gov> Cc: Mark Rivers <rivers at cars.uchicago.edu>; tech-talk at aps.anl.gov <tech-talk at aps.anl.gov> Subject: Re: How to find out PVs preventing SSCAN from running? On 8/4/21 4:42 PM, Li, Ji via Tech-talk wrote:
> brought *P1NV *to *PV OK* and enabled the scan. But *$(P)$(R)PID * doesn't get processed when written. How to define the PV as *PP* in such fields in base 7.0.5? The sscanRecord is an exceptional case which does not use the regular EPICS link mechanics. I think that these "link" fields are intended to behave mostly like CA_LINK. The code involved doesn't parse the PV name string provided, so link modifiers can't be used. In detail. There are no DBF_INLINK or DBF_OUTLINK fields defined in sscanRecord.dbd https://github.com/epics-modules/sscan/blob/420274ca2e4331e92119bd0524d0bcd7ffdd9f93/sscanApp/src/sscanRecord.dbd#L1 Instead the recDynLink code is used, which in turn is calling into libca. https://github.com/epics-modules/sscan/blob/420274ca2e4331e92119bd0524d0bcd7ffdd9f93/sscanApp/src/recDynLink.c#L204 |