feat(hepa-uv): Add CAN messages to control the Hepa/UV filter.

[vegano1]

Overview

We need to control the Hepa/UV filter from the Flex for testing and eventual system integration, this PR implements the CAN messages required to make this happen. It also adds a new method to query the time remaining before a software timer expires. This PR coincides with Opentrons/opentrons#14452 PR.

Closes: RET-1422 RET-1423

Test Plan

• Make sure the Hepa fan still turns on/off with the push button
• Make sure the UV Ballast still turns on/off with the push button when the Flex door is closed and reed switch is set.
• Make sure that we can set/get the Hepa fan state and duty cycle with the SetHepaFanStateRequest and GetHepaFanStateRequest messages.
• Make sure that we can set/get the UV light state and timeout with the SetHepaUVStateRequest and GetHepaUVStateRequest messages.
• Make sure that the UV light ONLY turns on via CAN message when the door is closed and reed switch is set.
• Make sure that the UV light turns OFF when the door is opened
• After turning ON the UV light via a CAN message, make sure we can turn off the light when the push button is pressed.

Change Log

• Added implementation for CAN messages to set/get Hepa fan state/duty cycle
• Added implementation for CAN messages to set/get UV Light state/timeout in seconds
• Added a get_remaining_time method to the FreeRTOSTimer class to know the time in ms before the timer expires.
• Integrated the new CAN messages into their corresponding Hepa Task and UV Task
• Refactored the Hepa Task logic so it takes into account the CAN messages so we aren't duplicating code.
• Refactored the UV Task logic so it takes into account the CAN messages so we aren't duplicating code.

Review Requests

• Does anything not make sense with the can messages?

Risk Assessment

Low, unreleased

[sfoster1]

Looks good, but let's change the name of that macro. Also, I think this functionality is getting to the point where it should really have tests.

[vegano1]

Looks good, but let's change the name of that macro. Also, I think this functionality is getting to the point where it should really have tests.

agreed, I will add a test suite in up coming PR.

[caila-marashaj]

Awesome!

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (1faf654) 83.58% compared to head (2d53da1) 83.58%.

Additional details and impacted files

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