feat: cleanup interface and leverage inheritance #51
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The initial implementation tried to separate the low-level interface to
the EMC2101's functionality from the high-level interfaces (PWM & DAC).
This lead to significant code duplication between EMC2101_Core and
EMC2101_PWM. This duplication would only get worse once EMC2101_DAC is
added.
The redesigned interface scraps that distinction and instead leverages
inheritance to remove code duplication. This is expected to result in a
cleaner and easier to manage code base.
notable changes:
(the external temperature sensor had many different names - these
have been cleaned up)
(The low-level implementation exclusively supports steps and has no
concept of a percentage or RPM. PWM and DAC implementation need to
provide the required logic to convert Percentage and RPM into steps.)