base implementation for pmt continuous observer

[benvanwerkhoven]

I can't test it locally, but made a base implementation for @loostrum to use/finish.

[loostrum]

@benvanwerkhoven with some small changes this seems to work! I don't have write access to this repo, if you're ok with giving me that I'll push the fixes to this branch.

I'm thinking there might be more accurate way to use PMT, but it's a bit different from the current implementation of a continuous observer: with PMT (and powersensor too) you can call read() which returns a state object that contains the current energy counter. After finishing the benchmark, you can call read() again, and the diff of the energy values in the two states is an accurate representation of the energy used. So instead of continuously measuring power and deriving the energy, it's the other way around. I could work on that later, but for now this continuous observer version is very useful and a lot more accurate than the normal benchmark observer.

[benvanwerkhoven]

Great to hear @loostrum ! I've given you push access (thought you already had that, but it appears not :-) )

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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