✨ Add tla2528 driver

[MichaelYKersey]

The tla2528 is an i2c-based GPIO expander and ADC mux. It has 8 pins that can each be independently configured and operated as GPIO or ADC. This is a port of the tla2528 driver and adapters from the SJSU robotics team.

Features

• ADC readings
• Digital input readings (bus & individual)
• Digital output writing (bus & individual) (push-pull & open-drain)
• Adapters for each

Missing/future/unimplemented features:

• TLA reset on object creation
• ADC 16-bit precision (currently 12-bit, but chip allows for more)
• ADC channel verification (redundancy)

[MichaelYKersey]

currently, the reset command is declared as a private method but is unimplemented. Should it be removed? or is it better to leave it there for the binary interface consistency (I'm not sure how ABIs work)

[kammce]

Great work! Much of my comments have to do with formatting and documentation. The rest mostly looks good.

[kammce]

currently, the reset command is declared as a private method but is unimplemented. Should it be removed? or is it better to leave it there for the binary interface consistency (I'm not sure how ABIs work)

See my comment on what you should do about reset. As for ABI, class functions do not effect the ABI of a function so nothing to worry about from that angle.