Experimental Physics and
Industrial Control System

Dirk Zimoch via Tech-talk <[email protected]> · Fri, 15 Feb 2019 10:58:22 +0100

I tested it and it hung up my ioc. Seems I have a bug in regsub.

On 15.02.19 09:55, Dirk Zimoch via Tech-talk wrote:

Unfortunately StreamDevice cannot easily parse such interlaced arrays at

the moment.

Maybe the following works:

For the values:
Separator=",";
in "%#/[.0-9]+|//%f";

For the Timestamps:
Separator=",";
in "%#/|[.0-9E+-]+//%f";

%#/regexp/subs/ is the regular expression pre-processor, here removing

the "other" array from the input. Performance may be not so good and

scales like O(n²) with the array length because of all the copying

involved.

One of the records should be active having the 'out' command that

produces the reply. The other should be "I/O Intr" reading the time

stamps passively.

Not tested. Hope it works.
Dirk

On 14.02.19 18:35, Joao Afonso via Tech-talk wrote:

Hello,

I have a string returned by a device, representing an array where each

element is a pair <time, value>:

- each pair is separated by "|": <timestamp>|<value>
- each element of the array separated by ","
- all values are floats

- the timestamp increment may not be linear (that is why it needs to

be recorded)

Example
0.1000|0.1230000E+00,0.2000|0.4560000E+00,0.3000|0.7890000E+00, [...]

Is it possible to parse this using stream device (into two waveform

records)?

Or do I have to use something more powerful such as asynDriver?

I have seen several examples, but only with using simple type

elements, not like this.

As a followup, is it possible to do the inverse, merging two waveform

records into a string?

Thank you in advance,
Joao
CERN TE-EPC-CCS

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System