Disable heart rate tracking while charging

[Andersama]

Verification

• I searched for similar issues (including closed issues) and found none was relevant.

Introduce the issue

The watch faces appear to be able to indicate when the watch is charging, use that information to disable background and foreground heart rate tracking.

Preferred solution

No response

Version

No response

[Andersama]

I'm not 100% clear on the state machine as of yet, but I'm imagining something like:

    case States::BackgroundMeasuring:
    case States::ForegroundMeasuring:
      if (batteryController.IsCharging()) {
        return portMAX_DELAY;
      }
     return CalculateSleepTicks();

here:

InfiniTime/src/heartratetask/HeartRateTask.cpp

Line 68 in 99ae2f3

switch (state) {

Might be what we're after.

[Andersama]

Alternatively modifying HeartRateTask::Work() would probably make more sense.

[Andersama]

May also make sense to modify the condition inside of HandleSensorData():

if (ambient > 0 || batteryController.IsCharging()) {

[Andersama]

On second look, probably should use IsPowerPresent()

[Andersama]

I've made the changes above, but I'm clearly missing something, the sensor remains active.