add get phase function for halfbridge

Author: alejandrogonzalvo

Inc/ST-LIB_LOW/HalfBridge/HalfBridge.hpp

@@ -24,6 +24,7 @@ class HalfBridge {
 	void set_duty_cycle(float duty_cycle);
 	void set_frequency(int32_t frequency);
 	void set_phase(float phase);
+	float get_phase();
 
 private:
 	bool is_dual;

Src/ST-LIB_LOW/HalfBridge/HalfBridge.cpp

@@ -45,3 +45,7 @@ void HalfBridge::set_phase(float phase) {
 	positive_pwm.set_phase(phase);
 	negative_pwm.set_phase(-phase);
 }
+
+float HalfBridge::get_phase() {
+	return positive_pwm.phase;
+}