fix(api): Enable audio on GPIO startup

[theosanderson]

overview

The GPIO pin that allows the Pi to output audio was automatically enabled prior to the upgrade to libgpiod #5381 . This is relied upon by e.g. this test

opentrons/api/src/opentrons/tools/factory_test.py

Line 217 in 751d9a4

def test_speaker():

, and allows users to make their robots make sounds.

This should restore that functionality by enabling this pin during GPIO setup.

Do close this if it was an active decision to deprecate audio (but that seems a shame given it is the only way the OT2 has to communicate autonomously)

changelog

• adds function to control audio_enable_pin and calls out to it during setup

review requests

@ahiuchingau seems to be the expert on this

risk assessment

• setup function should already be covered by tests?
• this will restore speaker functionality so might cause a robot's speaker to emit noise if it has a hardware fault and has only been used/tested since the libgpiod update, but this is quite recent!

[theosanderson]

I can't see how the JS build breakage can be related, but let me know if you think it is

[ahiuchingau]

Oh nice catch! LGTM