Experimental Physics and
Industrial Control System

What do you observe with the code you showed in the last message?

Mark

From: Yann Mandza <yann.mandza at ess.eu>
Sent: Saturday, May 11, 2024 11:50 AM
To: Torsten Bögershausen <tboegi at edom.se>; tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>; Mark Rivers <rivers at cars.uchicago.edu>
Subject: RE: Output record with TSE=-2 and info(asyn:READBACK, "1") returns <undefined> time.

Hey Torsten, Mark pitched in, but I forgot to add you in my response.

> Do you call setTimeStamp() ?

Here the implementation for my write method. Testing for normal async with caput first.

asynStatus drvAsynIsegHalService::writeFloat64( asynUser *pasynUser, epicsFloat64 value )

{

  static const char *functionName = "writeFloat64";

  const char *propertyName;

  epicsTimeStamp timeStamp;

  char sVal[WRITE_BUF_LEN];

  int function = pasynUser->reason;

  asynStatus status = asynSuccess;

  epicsSnprintf( sVal, WRITE_BUF_LEN, "%f", value );

/*call driver methods and return asynError if write operation fails*/

// Get current IOC time.

epicsTimeGetCurrent( &timeStamp  );

// tried this without success.

setTimeStamp(&timeStamp);

  // update value of parameter

  status = ( asynStatus ) setDoubleParam( function, value );

  status = ( asynStatus ) callParamCallbacks( );

  if( status )

    epicsSnprintf( pasynUser->errorMessage, pasynUser->errorMessageSize,

                   "%s:%s: status=%d, function=%d, value=%f",

                   session_, functionName, status, function, value );

  else

    asynPrint( pasynUser, ASYN_TRACEIO_DEVICE,

               "%s:%s: function=%d, value=%f\n",

              session_, functionName, function, value );

  return status;

}

Regards,

Yann

-----Original Message-----
From: Torsten Bögershausen <tboegi at edom.se>
Sent: Saturday, May 11, 2024 4:57 PM
To: Yann Mandza <yann.mandza at ess.eu>; tech-talk at aps.anl.gov
Subject: Re: Output record with TSE=-2 and info(asyn:READBACK, "1") returns <undefined> time.

On 2024-05-11 13:39, Yann Mandza via Tech-talk wrote:

> Dear all,

> 

> I am working onan Asyn Port driver using with asynR4-42 on a Linux

> machine. Am trying to add timing support for Output record using

> TSE=-2 and

> 

> and info(asyn:READBACK, "1"). When I caget an output PV with TSE=-2

> after caput to it the time obtained is <undefined> though the value is

> well written to the device.

> 

> A camonitor on a PV with TSE=-2 and info(asyn:READBACK, "1") show an

> <undefined> time too though the read value is correct. I would like to

> associate the device timestamp to the record for output readback, and

> the current time return by epicsTimeGetCurrent to the record after a

> caput. In my poller thread this is how I set the time stamp:

> 

> epicsUInt32 seconds = 0;

> 

> epicsUInt32 microsecs = 0;

> 

> epicsTimeStamp time;

> 

> sscanf( timeStampLastChanged/*hardware time string*, "%u.%u",

> &seconds, &microsecs ) != 2 )

> 

> time.secPastEpoch = seconds - POSIX_TIME_AT_EPICS_EPOCH;

> 

> time.nsec = microsecs * 100000;

> 

> pasynUser->timestamp = time;

Do you call setTimeStamp() ?

<https://github.com/EuropeanSpallationSource/m-epics-ethercatmc/blob/master/ethercatmcApp/src/ethercatmcIndexer.cpp#L1798>