Experimental Physics and
Industrial Control System

Hi David,

On 03/10/2014 11:27 AM, David Michel wrote:
> I'm using a Waveform record of type char to represent a string (not
> using a  Stringin or Stringout record since this string has more than 40
> characters).
> 
> That works well and I can easily put a string into this record such with
> caput -a and read it back with caget -s

You can also use the -S option (upper-case S) to caput and caget which
was added for long string support.

> Now, I need to use this string in an aSub record but I'm having
> difficulties in doing so.
> 
> char ** myString;
> myString = (char **) precord->a;
> printf("%s\n",myString);
> 
> The results of the printf statement shows only the first character of
> the string in ASCII.
> 
> Any idea of I can solve this?

How is your asub.A field configured, i.e. what have you set FTA and NOA
to? They should match the waveform record, FTA=CHAR and NOA=256 or
whatever your waveform string length is.

- Andrew
-- 
Advertising may be described as the science of arresting the human
intelligence long enough to get money from it. -- Stephen Leacock

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Using a Waveform record (char type representing a String) as input to an aSub record David Michel

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