Fix all compiler warnings and migrate off depreciated ADC and I2C libraries.
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Co-authored-by: Erik Olof Gunnar Andersson <eandersson@users.noreply.github.com>
Pulls common i2c macros (e.g. GPIO pins, speed, etc.)
into a common header, to deduplicate and increase
maintainability.
Also adds missing include for DS4432U.h in DS4432U.c.