Synchornous ADC API

[AnneOnciulescu]

Pull Request Overview

This PR adds a Synchornous ADC API, which includes:

• function for checking the existence of the driver
• functions for initating reading of a sample, registering and unregistering a listener
• function for synchronous sample readings
• unit tests

Alongside the API, this PR adds a fake driver (and unit tests for it) for testing the API.

Testing Strategy

This pull request was tested using unit tests made specifically for this API and fake driver.

TODO or Help Wanted

This pull request still needs feedback / code review.
Tests needed for get_resolution_bits() and get_reference_voltage_mv().
Another PR will follow up with the implementation and tests for continuous sampling.

[jrvanwhy]

TODO or Help Wanted

This pull request still needs feedback / code review. Tests needed for get_resolution_bits() and get_reference_voltage_mv(). Another PR will follow up with the implementation and tests for continuous sampling.

get_resolution_bits() and get_reference_voltage_mv() are so simple I don't feel that tests are necessary. I'm happy to merge this as-is if you are okay with me doing so.

[AnneOnciulescu]

TODO or Help Wanted

This pull request still needs feedback / code review. Tests needed for get_resolution_bits() and get_reference_voltage_mv(). Another PR will follow up with the implementation and tests for continuous sampling.

get_resolution_bits() and get_reference_voltage_mv() are so simple I don't feel that tests are necessary. I'm happy to merge this as-is if you are okay with me doing so.

That would be great, thank you!

[jrvanwhy]

bors r+

[bors]

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