WIP on controllers

src/lib/ecl/attitude_fw/ecl_pitch_controller.cpp

@@ -51,6 +51,12 @@ ECL_PitchController::ECL_PitchController() :
 float ECL_PitchController::control(float pitch_setpoint, float pitch, float pitch_rate, float roll, float scaler,
 				   bool lock_integrator, float airspeed_min, float airspeed_max, float aspeed)
 {
+	/* get the usual dt estimate */
+	uint64_t dt_micros = ecl_elapsed_time(&_last_run);
+	_last_run = ecl_absolute_time();
+
+	float dt = (dt_micros > 500000) ? 0.0f : dt_micros / 1000000;
+
 	return 0.0f;
 }