Fixes and Enhancement for Touch Alarm

[microdev1]

A couple of fixes and an enhancement for TouchAlarm.

Fixes :-

• Fix wake_alarm is set to touch alarm on auto-reload.
• Prevent touch alarm initialization if not set. Issue Deep sleep current is up to 2.6mA on ESP32-S2 #3968.

Enhancement :-

• Add ability to have multiple touch alarms in light-sleep.

[dhalbert]

Thanks! I tested the PR artifact on a MagTag. With no TouchAlarm enabled, power consumption is back down, about 230uA. Did you turn off something else that would have lowered it from the 260uA I saw before?

Deep-sleeping with a TouchAlarm enabled brings the sleep current back up to 2.something mA. Do you think it is possible to get this down further by setting the duty cycle lower with setting changes via touch_pad_set_meas_time() or other changes? We can ship with the higher current now, as long as TimeAlarm is low-current, but it would be nice to have lower consumption for touch.

[dhalbert]

@microdev1 could you merge from adafruit to get circuitpython.pot in sync, and the push again? Thanks. I could not push to your PR

[microdev1]

Did you turn off something else that would have lowered it from the 260uA I saw before?

Not that I know of... the changes here are TouchAlarm specific.

Do you think it is possible to get this down further by setting the duty cycle lower with setting changes via touch_pad_set_meas_time() or other changes?

The default touchpad config settings are being used at the moment... it might be possible to get lower current consumption by altering them. There is also a concern of stuff like ULP being on during sleep as esp_sleep_pd_config() is explicitly called.

We can ship with the higher current now, as long as TimeAlarm is low-current, but it would be nice to have lower consumption for touch.

I agree... current in mA range is too high.

[dhalbert]

Thanks! For now, ignoring a couple of de_DE builds that are too big.