Trouble Generating and Adding uORB Message

MAVLink
1

I’m attempting to add a message to the PX4 firmware and I can quite seem to figure out how to fully implement it. I’m created and compiled a .msg file and began implementing functionality into mavlink_messages.cpp. Here’s the relevant code so I can highlight the problem:

versatol.msg

#VERSATOL
uint64 timestamp			# time since system start (microseconds)
float32 voltage_v		# Battery voltage in volts, 0 if unknown

uORB/topics/versatol.h

#pragma once


#include <uORB/uORB.h>


#ifndef __cplusplus

#endif


#ifdef __cplusplus
struct __EXPORT versatol_s {
#else
struct versatol_s {
#endif
	uint64_t timestamp;
	float voltage_v;
	uint8_t _padding0[4]; // required for logger


#ifdef __cplusplus

#endif
};

/* register this as object request broker structure */
ORB_DECLARE(versatol);


#ifdef __cplusplus
void print_message(const versatol_s& message);
#endif

mavlink_messages.cpp

class MavlinkStreamVersatol : public MavlinkStream{
public:
	const char *get_name() const override{
		return MavlinkStreamVersatol::get_name_static();	
	}

	static const char *get_name_static(){
		return "VERSATOL";
	}

	static uint16_t get_id_static(){
		return MAVLINK_MSG_ID_VERSATOL;
	}

	uint16_t get_id(){
		return get_id_static();
	}

	static MavlinkStream *new_instance(Mavlink *mavlink){
		return new MavlinkStreamVersatol(mavlink);
	}
	
	unsigned get_size(){
		return MAVLINK_MSG_ID_VERSATOL_LEN + MAVLINK_NUM_NON_PAYLOAD_BYTES;
	}
	
private:
	MavlinkOrbSubscription *_sub;
	uint64_t _voltage_v;

	/* do not allow top copying this class */
	MavlinkStreamVersatol(MavlinkStreamVersatol&);
	MavlinkStreamVersatol& operator = (const MavlinkStreamVersatol &);

protected:
	explicit MavlinkStreamVersatol(Mavlink *mavlink) : MavlinkStream(mavlink),
		_sub(_mavlink->add_orb_subscription(ORB_ID(versatol))), // make sure you enter the name of your uORB topic here
		_voltage_v(0)
	{}

	bool send(const hrt_abstime t)
	{
		struct versatol_s _versatol;
		
		if(_sub->update(&_voltage_v, &_versatol)) {
			mavlink_versatol_t _msg_versatol;
			
			_msg_versatol.timestamp = _versatol.timestamp;
			_msg_versatol.time_start_usec = _versatol.time_start_usec;
            		_msg_versatol.time_stop_usec  = _versatol.time_stop_usec;
            		_msg_versatol.coefficients =_versatol.coefficients;
            		_msg_versatol.seq_id = _versatol.seq_id;

			mavlink_msg_versatol_send_struct(_mavlink->get_channel(), &_msg_versatol);
		}

	return true;
	}
};

The problem I’m having is the header file that contains MAVLINK_MSG_ID_VERSATOL is not being generated, so I can’t include it. I’m not sure if I’m doing this wrong or if I’m missing a step. Everything up to including that has worked fine. I know px_generate_uorb_topic.py exists but it doesn’t seem to have generated anything useful as far as I can tell either. Really not sure where to go forward. Thanks.