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

Subject: Re: Stream Device parsing strings
From: Ralph Lange <Ralph.Lange@gmx.de>
To: tech-talk@aps.anl.gov
Date: Thu, 12 Apr 2012 12:39:10 +0200
Rod,

the "Separator" variable sets the separating character when reading
*array* data into waveform records. (So that it works with any number of
elements.)
In your case of non-array data, just use semicolon characters at the
appropriate positions inside the format string.

Good luck,
~Ralph


On Thu Apr 12 2012 00:01:39 GMT+0200 (CEST), Rod Nussbaumer
<bomr@triumf.ca> wrote:
> Hi all.
>
> I am trying to get streamDevice to break an input string that has
> fields delimited with semi-colons into discrete strings. The input
> string as read by asyn + GPIB looks something like
>
>> BIN;RI;MSB;4;32;500;Y;100.00000000000E-12;20.90000000000E-9;"s";0.05000000000;5.00000000000E-9;21.00000000000E-9;0.00500000000;232.83064365387E-12;0.0000;"V";"C2,
>> 50.00mV/div, 5.000ns/div,500 points, Sample mode";"C2"
>
> My stream device protocol looks like:
>
>
>> WFMPRE {
>>     ReplyTimeout = 200;
>>     ReadTimeout = 50;
>>     InTerminator = LF;
>>     Separator = ";";
>>     out "VERBOSE ON";
>>     out "WFMO?";
>>     in
>> "%(\$1PARAM01.VAL)s%(\$1PARAM02.VAL)s%(\$1PARAM03.VAL)s%(\$1PARAM04.VAL)s%(\$1PARAM05.VAL)s%(\$1PARAM06.VAL)s%(\$1PARAM07.VAL)s";
>>     out "VERBOSE OFF";
>> }
>
> where the records referred to by $1PARAMxx.VAL are stringout records
> with SoftChannel DTYP. Each successive conversion ends at either the
> 39th converted character, or the first whitespace. It seems to be
> completely ignoring the specified separator. Is this correct behavior?
> If so, any suggestions for accomplishing what I want (ability to
> access the string fields as records or as string elements of a
> waveform record. I intend to add more field conversions to complete
> the string parsing, if/when I get this much working.
>
> The data in question comes from a Tektronix scope, and contains the
> data need to convert a generically scaled waveform array into an array
> scaled to engineering units.
>
> Thanks.
>
> Rod Nussbaumer
> ISAC Controls, TRIUMF
> Vancouver, Canada.
>
>


Replies:
Re: Stream Device parsing strings Rod Nussbaumer
References:
Stream Device parsing strings Rod Nussbaumer

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