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<== Date ==> <== Thread ==>

Subject: soft Timestamp fixed point support
From: <william.smith@stfc.ac.uk>
To: <tech-talk@aps.anl.gov>
Date: Wed, 17 May 2017 13:43:06 +0000

Hi,

 

I am working on synchronising the timestamp on an IOC with a timestamp register on an FPGA. I need access to the 32 bit fixed point nanoseconds word that makes up the lower half of the EPICS timestamp. Using the “Soft Timestamp” I can only get the value as a floating point number (using ai) or a string (using stringin).

 

Is there a way of getting it in the fixed point format I want? As I understand it “Soft Timestamp” only works with ai and stringin records. Ideally I’d like support for longin records as well.

 

record(ai,"$(SYS)-EVR:EventTimestamp"){

          field(DTYP,"Soft Timestamp")

          field(TSEL,"$(SYS)-EVR:Event-14-SP.TIME")

}

 

The record is processed by a forward link from "$(SYS)-EVR:Event-14-SP”

 

 

Many thanks

 

Will

 

 


Replies:
Re: soft Timestamp fixed point support Andrew Johnson

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