Experimental Physics and
Industrial Control System

Hello,

 

I have some problems with the use of the “asub” record. I’m trying to update a waveform record with two strings. So, my EPICS database looks like this:

 

record(waveform, "$(P):CRExeSeq") {

  field(PINI, "NO")

  field(DTYP, "Soft Channel")

  field(UDF,  "0")

  field(NELM, "2")

  field(FTVL, "STRING")

}

 

record(aSub, "$(P):_notifyCRExeSeq") {

  field(SCAN, "Event")

  field(EVNT, "4")

  field(OUTA, "$(P):CRExeSeq")

  field(SNAM, "asub_notify")

  field(PINI, "NO")

  field(FTVA, "STRING")

  field(NOVA, "2")

  field(NEVA, "2")

}

 

The “$(P):CRExeSeq” record is updated by the “$(P):_notifyCRExeSeq” record when an observer class executes the “post_event(4)” function.  The problem is that my “asub_notify” function doesn’t really update the string waveform. In this function, I process the update in the following way:

 

// I get the new informations from an other class

QStringList l_infoAnotifier =

g_drvSequenceurMetier->getCRExecutionSequence();

 

//Here, I process the update

if(precord->nova <= l_infoAnotifier.size()){

      // I create a char**

      char** l_info =

(char**) malloc(l_infoAnotifier.size()*sizeof(char*));

 

      for(int i=0;i<l_infoAnotifier.size();i++){

            l_info[i] = (char*) malloc(40*sizeof(char));

            if(l_infoAnotifier.at(i).length()<=40){

      strcpy_s(l_info[i],40,l

   l_infoAnotifier.at(i).toStdString().c_str());

            } else {

                  strcpy_s(l_info[i],40,"Error too much char");

            }

      }

      //Copy

      try {

            char** l_stringout = (char**) precord->vala;

            memcpy_s(l_stringout,(40*precord->nova)*sizeof(char),

                  l_info,(40*l_infoAnotifier.size())*sizeof(char));

      } catch (...) {

            printf("Error in the asub_notify function\n");

      }

 

      //Delete

      delete[] l_info;

}

 

In the same way, I created a process function which seems to work for updating waveform of double-type data. Here, I think the problem comes from the string type and the “memcpy” functions.

Does anyone know how to realize asub functions for string waveforms? Or know why this code doesn’t work?

 

 

 

Cheers,

 

Pierre PERRIER Stagiaire - MCO LIL

Sopra group.

Parc Innolin 9 rue du Golf 33700 Merignac Phone : +33 (0)5 56 12 79 59 [email protected] - www.sopragroup.com

 

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