From facchinm on 2019-04-18

Hi @procsynth ,
thanks for your PR.

ArduinoISP sketch is meant to run on all Arduinos (also the ones with ARM chips), so it would be nice to keep the sketch functionalities in sync between all the targets.

The functionality is interesting and should be expanded a bit, like having a couple of options for the pin and the frequency to use, and less magic numbers 😉

From @procsynth on 2019-04-23

Hi@facchinm, thanks for your reply. I did not think in the scope of the whole Arduino project.
I'll make the changes requested, explain and test the code a little better when I have some time :)

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