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vfr_hud mavlink msg: use baro alt 

The vfr_hud message demands the AMSL altitude and not the wgs84
altitude. Use the baro altitude for now. This can be changed to an
output of the position estimator later.
This commit is contained in:
Thomas Gubler 2014-08-23 22:36:40 +02:00
parent edffb2eede
commit 3a029926b4
1 changed files with 9 additions and 2 deletions
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11
src/modules/mavlink/mavlink_messages.cpp
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@ -774,6 +774,9 @@ private:
MavlinkOrbSubscription *_airspeed_sub;
uint64_t _airspeed_time;
MavlinkOrbSubscription *_sensor_combined_sub;
uint64_t _sensor_combined_time;
/* do not allow top copying this class */
MavlinkStreamVFRHUD(MavlinkStreamVFRHUD &);
MavlinkStreamVFRHUD& operator = (const MavlinkStreamVFRHUD &);
@ -789,7 +792,9 @@ protected:
_act_sub(_mavlink->add_orb_subscription(ORB_ID(actuator_controls_0))),
_act_time(0),
_airspeed_sub(_mavlink->add_orb_subscription(ORB_ID(airspeed))),
_airspeed_time(0)
_airspeed_time(0),
_sensor_combined_sub(_mavlink->add_orb_subscription(ORB_ID(sensor_combined))),
_sensor_combined_time(0)
{}
void send(const hrt_abstime t)
@ -799,12 +804,14 @@ protected:
struct actuator_armed_s armed;
struct actuator_controls_s act;
struct airspeed_s airspeed;
struct sensor_combined_s sensor_combined;
bool updated = _att_sub->update(&_att_time, &att);
updated |= _pos_sub->update(&_pos_time, &pos);
updated |= _armed_sub->update(&_armed_time, &armed);
updated |= _act_sub->update(&_act_time, &act);
updated |= _airspeed_sub->update(&_airspeed_time, &airspeed);
updated |= _sensor_combined_sub->update(&_sensor_combined_time, &sensor_combined);
if (updated) {
mavlink_vfr_hud_t msg;
@ -813,7 +820,7 @@ protected:
msg.groundspeed = sqrtf(pos.vel_n * pos.vel_n + pos.vel_e * pos.vel_e);
msg.heading = _wrap_2pi(att.yaw) * M_RAD_TO_DEG_F;
msg.throttle = armed.armed ? act.control[3] * 100.0f : 0.0f;
msg.alt = pos.alt;
msg.alt = sensor_combined.baro_alt_meter;
msg.climb = -pos.vel_d;
_mavlink->send_message(MAVLINK_MSG_ID_VFR_HUD, &msg);