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Subject: RE: waveform arrays within SNL
From: Mark Rivers <rivers@cars.uchicago.edu>
To: 'Al Honey' <ahoney@keck.hawaii.edu>, "'tech-talk@aps.anl.gov'" <tech-talk@aps.anl.gov>
Date: Tue, 20 Jun 2017 19:28:09 +0000

You need to change it to:

 

#define MAX_LOCATIONS 1000

int locations[MAX_LOCATIONS];

assign locations to "{tel}{instr}:{mech}:locations";  // where locations is a waveform record with an integer array.

 

Do you mean a waveform record of type CHAR that is used to hold a long string?  I think you just declare it as

 

char waveform[MAX_SIZE];

 

Mark

 

 

From: tech-talk-bounces@aps.anl.gov [mailto:tech-talk-bounces@aps.anl.gov] On Behalf Of Al Honey
Sent: Tuesday, June 20, 2017 2:22 PM
To: 'tech-talk@aps.anl.gov'
Subject: waveform arrays within SNL

 

Hi

I cannot find an explicit example in regards to accessing the element values in a waveform array from within an SNL sequencer.

Does anybody have experience doing so?

 

Can’t seem to do this:

 

int locations;

assign locations to "{tel}{instr}:{mech}:locations";  // where locations is a waveform record with an integer array.

int locs[4] = {0,300,600,900};

 

        pvGet( locations );

        locs = locations;               // is the declaration for locations (above) correct?

 

error: incompatible types when assigning to type int[4] from type int *

         locs = locations;

 

This fails too:

         locs[0] = locations[0];

 

I guess I’m ignorant in regards to accessing the array values in the record.

 

Also, is it necessary to escape to C in order to update the elements in a waveform string record?

 

Thanks for any advice you have

Al

 


Replies:
RE: waveform arrays within SNL Al Honey
References:
waveform arrays within SNL Al Honey

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