drivers/power_monitor: Implement temperature sensor support for INA228 / INA238

src/lib/battery/battery.cpp

@@ -106,6 +106,11 @@ void Battery::updateCurrent(const float current_a)
 	_current_a = current_a;
 }
 
+void Battery::updateTemperature(const float temperature_c)
+{
+	_temperature_c = temperature_c;
+}
+
 void Battery::updateBatteryStatus(const hrt_abstime &timestamp)
 {
 	// Require minimum voltage otherwise override connected status
@@ -149,7 +154,7 @@ battery_status_s Battery::getBatteryStatus()
 	battery_status.remaining = _state_of_charge;
 	battery_status.scale = _scale;
 	battery_status.time_remaining_s = computeRemainingTime(_current_a);
-	battery_status.temperature = NAN;
+	battery_status.temperature = _temperature_c;
 	battery_status.cell_count = _params.n_cells;
 	battery_status.connected = _connected;
 	battery_status.source = _source;

src/lib/battery/battery.h

@@ -91,6 +91,7 @@ public:
 	void setStateOfCharge(const float soc) { _state_of_charge = soc; _external_state_of_charge = true; }
 	void updateVoltage(const float voltage_v);
 	void updateCurrent(const float current_a);
+	void updateTemperature(const float temperature_c);
 
 	/**
 	 * Update state of charge calculations
@@ -168,6 +169,7 @@ private:
 	float _current_a{-1};
 	AlphaFilter<float>
 	_current_average_filter_a; ///< averaging filter for current. For FW, it is the current in level flight.
+	float _temperature_c{NAN};
 	float _discharged_mah{0.f};
 	float _discharged_mah_loop{0.f};
 	float _state_of_charge_volt_based{-1.f}; // [0,1]