Issue in SVPublisher_ASDU_setSmpRate

[faheemahmed21]

I am trying to generate 4000 samples per second by setting sample mod to samples per second and then specifying 4000 samples per second to be generated.

    SVPublisher_ASDU_setSmpMod  (asdu1, IEC61850_SV_SMPMOD_SAMPLES_PER_SECOND);
    SVPublisher_ASDU_setSmpRate     (asdu1, 4000);

However, upon execution, the programme generates samples per second randomly rather than 4000 samples per second.

[mzillgith]

It sends one message when you call SVPublisher_publish. So the code that is calling SVPublisher_publish is responsible to ensure the sample rate. SVPublisher_ASDU_setSmpRate only set the value in the SV message header.

[faheemahmed21]

Thank you for your response.

My purpose to see these commands is to define the sample rate of 4000 samples per second and for that purpose, I am using SVPublisher_ASDU_setSmpRate. However, upon using that command, I am unable to achieve the desired sample rate of 4000 samples per second. Could you please comment on how to achieve the desired sample rate? Thank you.

[mzillgith]

You have to ensure that you call SVPublisher_publish in the frequency required by your sampling rate and the number of samples per ASDU. On a linux system you can approximate this with calling usleep and tweaking the wait time between SVPublisher_publish calls. This might work for a prototype. But for a production solution you would need some kind of RTOS integration.