mavlink_msg_altitude.h 22 KB

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  1. #pragma once
  2. // MESSAGE ALTITUDE PACKING
  3. #define MAVLINK_MSG_ID_ALTITUDE 141
  4. typedef struct __mavlink_altitude_t {
  5. uint64_t time_usec; /*< [us] Timestamp (UNIX Epoch time or time since system boot). The receiving end can infer timestamp format (since 1.1.1970 or since system boot) by checking for the magnitude of the number.*/
  6. float altitude_monotonic; /*< [m] This altitude measure is initialized on system boot and monotonic (it is never reset, but represents the local altitude change). The only guarantee on this field is that it will never be reset and is consistent within a flight. The recommended value for this field is the uncorrected barometric altitude at boot time. This altitude will also drift and vary between flights.*/
  7. float altitude_amsl; /*< [m] This altitude measure is strictly above mean sea level and might be non-monotonic (it might reset on events like GPS lock or when a new QNH value is set). It should be the altitude to which global altitude waypoints are compared to. Note that it is *not* the GPS altitude, however, most GPS modules already output MSL by default and not the WGS84 altitude.*/
  8. float altitude_local; /*< [m] This is the local altitude in the local coordinate frame. It is not the altitude above home, but in reference to the coordinate origin (0, 0, 0). It is up-positive.*/
  9. float altitude_relative; /*< [m] This is the altitude above the home position. It resets on each change of the current home position.*/
  10. float altitude_terrain; /*< [m] This is the altitude above terrain. It might be fed by a terrain database or an altimeter. Values smaller than -1000 should be interpreted as unknown.*/
  11. float bottom_clearance; /*< [m] This is not the altitude, but the clear space below the system according to the fused clearance estimate. It generally should max out at the maximum range of e.g. the laser altimeter. It is generally a moving target. A negative value indicates no measurement available.*/
  12. } mavlink_altitude_t;
  13. #define MAVLINK_MSG_ID_ALTITUDE_LEN 32
  14. #define MAVLINK_MSG_ID_ALTITUDE_MIN_LEN 32
  15. #define MAVLINK_MSG_ID_141_LEN 32
  16. #define MAVLINK_MSG_ID_141_MIN_LEN 32
  17. #define MAVLINK_MSG_ID_ALTITUDE_CRC 47
  18. #define MAVLINK_MSG_ID_141_CRC 47
  19. #if MAVLINK_COMMAND_24BIT
  20. #define MAVLINK_MESSAGE_INFO_ALTITUDE { \
  21. 141, \
  22. "ALTITUDE", \
  23. 7, \
  24. { { "time_usec", NULL, MAVLINK_TYPE_UINT64_T, 0, 0, offsetof(mavlink_altitude_t, time_usec) }, \
  25. { "altitude_monotonic", NULL, MAVLINK_TYPE_FLOAT, 0, 8, offsetof(mavlink_altitude_t, altitude_monotonic) }, \
  26. { "altitude_amsl", NULL, MAVLINK_TYPE_FLOAT, 0, 12, offsetof(mavlink_altitude_t, altitude_amsl) }, \
  27. { "altitude_local", NULL, MAVLINK_TYPE_FLOAT, 0, 16, offsetof(mavlink_altitude_t, altitude_local) }, \
  28. { "altitude_relative", NULL, MAVLINK_TYPE_FLOAT, 0, 20, offsetof(mavlink_altitude_t, altitude_relative) }, \
  29. { "altitude_terrain", NULL, MAVLINK_TYPE_FLOAT, 0, 24, offsetof(mavlink_altitude_t, altitude_terrain) }, \
  30. { "bottom_clearance", NULL, MAVLINK_TYPE_FLOAT, 0, 28, offsetof(mavlink_altitude_t, bottom_clearance) }, \
  31. } \
  32. }
  33. #else
  34. #define MAVLINK_MESSAGE_INFO_ALTITUDE { \
  35. "ALTITUDE", \
  36. 7, \
  37. { { "time_usec", NULL, MAVLINK_TYPE_UINT64_T, 0, 0, offsetof(mavlink_altitude_t, time_usec) }, \
  38. { "altitude_monotonic", NULL, MAVLINK_TYPE_FLOAT, 0, 8, offsetof(mavlink_altitude_t, altitude_monotonic) }, \
  39. { "altitude_amsl", NULL, MAVLINK_TYPE_FLOAT, 0, 12, offsetof(mavlink_altitude_t, altitude_amsl) }, \
  40. { "altitude_local", NULL, MAVLINK_TYPE_FLOAT, 0, 16, offsetof(mavlink_altitude_t, altitude_local) }, \
  41. { "altitude_relative", NULL, MAVLINK_TYPE_FLOAT, 0, 20, offsetof(mavlink_altitude_t, altitude_relative) }, \
  42. { "altitude_terrain", NULL, MAVLINK_TYPE_FLOAT, 0, 24, offsetof(mavlink_altitude_t, altitude_terrain) }, \
  43. { "bottom_clearance", NULL, MAVLINK_TYPE_FLOAT, 0, 28, offsetof(mavlink_altitude_t, bottom_clearance) }, \
  44. } \
  45. }
  46. #endif
  47. /**
  48. * @brief Pack a altitude message
  49. * @param system_id ID of this system
  50. * @param component_id ID of this component (e.g. 200 for IMU)
  51. * @param msg The MAVLink message to compress the data into
  52. *
  53. * @param time_usec [us] Timestamp (UNIX Epoch time or time since system boot). The receiving end can infer timestamp format (since 1.1.1970 or since system boot) by checking for the magnitude of the number.
  54. * @param altitude_monotonic [m] This altitude measure is initialized on system boot and monotonic (it is never reset, but represents the local altitude change). The only guarantee on this field is that it will never be reset and is consistent within a flight. The recommended value for this field is the uncorrected barometric altitude at boot time. This altitude will also drift and vary between flights.
  55. * @param altitude_amsl [m] This altitude measure is strictly above mean sea level and might be non-monotonic (it might reset on events like GPS lock or when a new QNH value is set). It should be the altitude to which global altitude waypoints are compared to. Note that it is *not* the GPS altitude, however, most GPS modules already output MSL by default and not the WGS84 altitude.
  56. * @param altitude_local [m] This is the local altitude in the local coordinate frame. It is not the altitude above home, but in reference to the coordinate origin (0, 0, 0). It is up-positive.
  57. * @param altitude_relative [m] This is the altitude above the home position. It resets on each change of the current home position.
  58. * @param altitude_terrain [m] This is the altitude above terrain. It might be fed by a terrain database or an altimeter. Values smaller than -1000 should be interpreted as unknown.
  59. * @param bottom_clearance [m] This is not the altitude, but the clear space below the system according to the fused clearance estimate. It generally should max out at the maximum range of e.g. the laser altimeter. It is generally a moving target. A negative value indicates no measurement available.
  60. * @return length of the message in bytes (excluding serial stream start sign)
  61. */
  62. static inline uint16_t mavlink_msg_altitude_pack(uint8_t system_id, uint8_t component_id, mavlink_message_t* msg,
  63. uint64_t time_usec, float altitude_monotonic, float altitude_amsl, float altitude_local, float altitude_relative, float altitude_terrain, float bottom_clearance)
  64. {
  65. #if MAVLINK_NEED_BYTE_SWAP || !MAVLINK_ALIGNED_FIELDS
  66. char buf[MAVLINK_MSG_ID_ALTITUDE_LEN];
  67. _mav_put_uint64_t(buf, 0, time_usec);
  68. _mav_put_float(buf, 8, altitude_monotonic);
  69. _mav_put_float(buf, 12, altitude_amsl);
  70. _mav_put_float(buf, 16, altitude_local);
  71. _mav_put_float(buf, 20, altitude_relative);
  72. _mav_put_float(buf, 24, altitude_terrain);
  73. _mav_put_float(buf, 28, bottom_clearance);
  74. memcpy(_MAV_PAYLOAD_NON_CONST(msg), buf, MAVLINK_MSG_ID_ALTITUDE_LEN);
  75. #else
  76. mavlink_altitude_t packet;
  77. packet.time_usec = time_usec;
  78. packet.altitude_monotonic = altitude_monotonic;
  79. packet.altitude_amsl = altitude_amsl;
  80. packet.altitude_local = altitude_local;
  81. packet.altitude_relative = altitude_relative;
  82. packet.altitude_terrain = altitude_terrain;
  83. packet.bottom_clearance = bottom_clearance;
  84. memcpy(_MAV_PAYLOAD_NON_CONST(msg), &packet, MAVLINK_MSG_ID_ALTITUDE_LEN);
  85. #endif
  86. msg->msgid = MAVLINK_MSG_ID_ALTITUDE;
  87. return mavlink_finalize_message(msg, system_id, component_id, MAVLINK_MSG_ID_ALTITUDE_MIN_LEN, MAVLINK_MSG_ID_ALTITUDE_LEN, MAVLINK_MSG_ID_ALTITUDE_CRC);
  88. }
  89. /**
  90. * @brief Pack a altitude message on a channel
  91. * @param system_id ID of this system
  92. * @param component_id ID of this component (e.g. 200 for IMU)
  93. * @param chan The MAVLink channel this message will be sent over
  94. * @param msg The MAVLink message to compress the data into
  95. * @param time_usec [us] Timestamp (UNIX Epoch time or time since system boot). The receiving end can infer timestamp format (since 1.1.1970 or since system boot) by checking for the magnitude of the number.
  96. * @param altitude_monotonic [m] This altitude measure is initialized on system boot and monotonic (it is never reset, but represents the local altitude change). The only guarantee on this field is that it will never be reset and is consistent within a flight. The recommended value for this field is the uncorrected barometric altitude at boot time. This altitude will also drift and vary between flights.
  97. * @param altitude_amsl [m] This altitude measure is strictly above mean sea level and might be non-monotonic (it might reset on events like GPS lock or when a new QNH value is set). It should be the altitude to which global altitude waypoints are compared to. Note that it is *not* the GPS altitude, however, most GPS modules already output MSL by default and not the WGS84 altitude.
  98. * @param altitude_local [m] This is the local altitude in the local coordinate frame. It is not the altitude above home, but in reference to the coordinate origin (0, 0, 0). It is up-positive.
  99. * @param altitude_relative [m] This is the altitude above the home position. It resets on each change of the current home position.
  100. * @param altitude_terrain [m] This is the altitude above terrain. It might be fed by a terrain database or an altimeter. Values smaller than -1000 should be interpreted as unknown.
  101. * @param bottom_clearance [m] This is not the altitude, but the clear space below the system according to the fused clearance estimate. It generally should max out at the maximum range of e.g. the laser altimeter. It is generally a moving target. A negative value indicates no measurement available.
  102. * @return length of the message in bytes (excluding serial stream start sign)
  103. */
  104. static inline uint16_t mavlink_msg_altitude_pack_chan(uint8_t system_id, uint8_t component_id, uint8_t chan,
  105. mavlink_message_t* msg,
  106. uint64_t time_usec,float altitude_monotonic,float altitude_amsl,float altitude_local,float altitude_relative,float altitude_terrain,float bottom_clearance)
  107. {
  108. #if MAVLINK_NEED_BYTE_SWAP || !MAVLINK_ALIGNED_FIELDS
  109. char buf[MAVLINK_MSG_ID_ALTITUDE_LEN];
  110. _mav_put_uint64_t(buf, 0, time_usec);
  111. _mav_put_float(buf, 8, altitude_monotonic);
  112. _mav_put_float(buf, 12, altitude_amsl);
  113. _mav_put_float(buf, 16, altitude_local);
  114. _mav_put_float(buf, 20, altitude_relative);
  115. _mav_put_float(buf, 24, altitude_terrain);
  116. _mav_put_float(buf, 28, bottom_clearance);
  117. memcpy(_MAV_PAYLOAD_NON_CONST(msg), buf, MAVLINK_MSG_ID_ALTITUDE_LEN);
  118. #else
  119. mavlink_altitude_t packet;
  120. packet.time_usec = time_usec;
  121. packet.altitude_monotonic = altitude_monotonic;
  122. packet.altitude_amsl = altitude_amsl;
  123. packet.altitude_local = altitude_local;
  124. packet.altitude_relative = altitude_relative;
  125. packet.altitude_terrain = altitude_terrain;
  126. packet.bottom_clearance = bottom_clearance;
  127. memcpy(_MAV_PAYLOAD_NON_CONST(msg), &packet, MAVLINK_MSG_ID_ALTITUDE_LEN);
  128. #endif
  129. msg->msgid = MAVLINK_MSG_ID_ALTITUDE;
  130. return mavlink_finalize_message_chan(msg, system_id, component_id, chan, MAVLINK_MSG_ID_ALTITUDE_MIN_LEN, MAVLINK_MSG_ID_ALTITUDE_LEN, MAVLINK_MSG_ID_ALTITUDE_CRC);
  131. }
  132. /**
  133. * @brief Encode a altitude struct
  134. *
  135. * @param system_id ID of this system
  136. * @param component_id ID of this component (e.g. 200 for IMU)
  137. * @param msg The MAVLink message to compress the data into
  138. * @param altitude C-struct to read the message contents from
  139. */
  140. static inline uint16_t mavlink_msg_altitude_encode(uint8_t system_id, uint8_t component_id, mavlink_message_t* msg, const mavlink_altitude_t* altitude)
  141. {
  142. return mavlink_msg_altitude_pack(system_id, component_id, msg, altitude->time_usec, altitude->altitude_monotonic, altitude->altitude_amsl, altitude->altitude_local, altitude->altitude_relative, altitude->altitude_terrain, altitude->bottom_clearance);
  143. }
  144. /**
  145. * @brief Encode a altitude struct on a channel
  146. *
  147. * @param system_id ID of this system
  148. * @param component_id ID of this component (e.g. 200 for IMU)
  149. * @param chan The MAVLink channel this message will be sent over
  150. * @param msg The MAVLink message to compress the data into
  151. * @param altitude C-struct to read the message contents from
  152. */
  153. static inline uint16_t mavlink_msg_altitude_encode_chan(uint8_t system_id, uint8_t component_id, uint8_t chan, mavlink_message_t* msg, const mavlink_altitude_t* altitude)
  154. {
  155. return mavlink_msg_altitude_pack_chan(system_id, component_id, chan, msg, altitude->time_usec, altitude->altitude_monotonic, altitude->altitude_amsl, altitude->altitude_local, altitude->altitude_relative, altitude->altitude_terrain, altitude->bottom_clearance);
  156. }
  157. /**
  158. * @brief Send a altitude message
  159. * @param chan MAVLink channel to send the message
  160. *
  161. * @param time_usec [us] Timestamp (UNIX Epoch time or time since system boot). The receiving end can infer timestamp format (since 1.1.1970 or since system boot) by checking for the magnitude of the number.
  162. * @param altitude_monotonic [m] This altitude measure is initialized on system boot and monotonic (it is never reset, but represents the local altitude change). The only guarantee on this field is that it will never be reset and is consistent within a flight. The recommended value for this field is the uncorrected barometric altitude at boot time. This altitude will also drift and vary between flights.
  163. * @param altitude_amsl [m] This altitude measure is strictly above mean sea level and might be non-monotonic (it might reset on events like GPS lock or when a new QNH value is set). It should be the altitude to which global altitude waypoints are compared to. Note that it is *not* the GPS altitude, however, most GPS modules already output MSL by default and not the WGS84 altitude.
  164. * @param altitude_local [m] This is the local altitude in the local coordinate frame. It is not the altitude above home, but in reference to the coordinate origin (0, 0, 0). It is up-positive.
  165. * @param altitude_relative [m] This is the altitude above the home position. It resets on each change of the current home position.
  166. * @param altitude_terrain [m] This is the altitude above terrain. It might be fed by a terrain database or an altimeter. Values smaller than -1000 should be interpreted as unknown.
  167. * @param bottom_clearance [m] This is not the altitude, but the clear space below the system according to the fused clearance estimate. It generally should max out at the maximum range of e.g. the laser altimeter. It is generally a moving target. A negative value indicates no measurement available.
  168. */
  169. #ifdef MAVLINK_USE_CONVENIENCE_FUNCTIONS
  170. static inline void mavlink_msg_altitude_send(mavlink_channel_t chan, uint64_t time_usec, float altitude_monotonic, float altitude_amsl, float altitude_local, float altitude_relative, float altitude_terrain, float bottom_clearance)
  171. {
  172. #if MAVLINK_NEED_BYTE_SWAP || !MAVLINK_ALIGNED_FIELDS
  173. char buf[MAVLINK_MSG_ID_ALTITUDE_LEN];
  174. _mav_put_uint64_t(buf, 0, time_usec);
  175. _mav_put_float(buf, 8, altitude_monotonic);
  176. _mav_put_float(buf, 12, altitude_amsl);
  177. _mav_put_float(buf, 16, altitude_local);
  178. _mav_put_float(buf, 20, altitude_relative);
  179. _mav_put_float(buf, 24, altitude_terrain);
  180. _mav_put_float(buf, 28, bottom_clearance);
  181. _mav_finalize_message_chan_send(chan, MAVLINK_MSG_ID_ALTITUDE, buf, MAVLINK_MSG_ID_ALTITUDE_MIN_LEN, MAVLINK_MSG_ID_ALTITUDE_LEN, MAVLINK_MSG_ID_ALTITUDE_CRC);
  182. #else
  183. mavlink_altitude_t packet;
  184. packet.time_usec = time_usec;
  185. packet.altitude_monotonic = altitude_monotonic;
  186. packet.altitude_amsl = altitude_amsl;
  187. packet.altitude_local = altitude_local;
  188. packet.altitude_relative = altitude_relative;
  189. packet.altitude_terrain = altitude_terrain;
  190. packet.bottom_clearance = bottom_clearance;
  191. _mav_finalize_message_chan_send(chan, MAVLINK_MSG_ID_ALTITUDE, (const char *)&packet, MAVLINK_MSG_ID_ALTITUDE_MIN_LEN, MAVLINK_MSG_ID_ALTITUDE_LEN, MAVLINK_MSG_ID_ALTITUDE_CRC);
  192. #endif
  193. }
  194. /**
  195. * @brief Send a altitude message
  196. * @param chan MAVLink channel to send the message
  197. * @param struct The MAVLink struct to serialize
  198. */
  199. static inline void mavlink_msg_altitude_send_struct(mavlink_channel_t chan, const mavlink_altitude_t* altitude)
  200. {
  201. #if MAVLINK_NEED_BYTE_SWAP || !MAVLINK_ALIGNED_FIELDS
  202. mavlink_msg_altitude_send(chan, altitude->time_usec, altitude->altitude_monotonic, altitude->altitude_amsl, altitude->altitude_local, altitude->altitude_relative, altitude->altitude_terrain, altitude->bottom_clearance);
  203. #else
  204. _mav_finalize_message_chan_send(chan, MAVLINK_MSG_ID_ALTITUDE, (const char *)altitude, MAVLINK_MSG_ID_ALTITUDE_MIN_LEN, MAVLINK_MSG_ID_ALTITUDE_LEN, MAVLINK_MSG_ID_ALTITUDE_CRC);
  205. #endif
  206. }
  207. #if MAVLINK_MSG_ID_ALTITUDE_LEN <= MAVLINK_MAX_PAYLOAD_LEN
  208. /*
  209. This variant of _send() can be used to save stack space by re-using
  210. memory from the receive buffer. The caller provides a
  211. mavlink_message_t which is the size of a full mavlink message. This
  212. is usually the receive buffer for the channel, and allows a reply to an
  213. incoming message with minimum stack space usage.
  214. */
  215. static inline void mavlink_msg_altitude_send_buf(mavlink_message_t *msgbuf, mavlink_channel_t chan, uint64_t time_usec, float altitude_monotonic, float altitude_amsl, float altitude_local, float altitude_relative, float altitude_terrain, float bottom_clearance)
  216. {
  217. #if MAVLINK_NEED_BYTE_SWAP || !MAVLINK_ALIGNED_FIELDS
  218. char *buf = (char *)msgbuf;
  219. _mav_put_uint64_t(buf, 0, time_usec);
  220. _mav_put_float(buf, 8, altitude_monotonic);
  221. _mav_put_float(buf, 12, altitude_amsl);
  222. _mav_put_float(buf, 16, altitude_local);
  223. _mav_put_float(buf, 20, altitude_relative);
  224. _mav_put_float(buf, 24, altitude_terrain);
  225. _mav_put_float(buf, 28, bottom_clearance);
  226. _mav_finalize_message_chan_send(chan, MAVLINK_MSG_ID_ALTITUDE, buf, MAVLINK_MSG_ID_ALTITUDE_MIN_LEN, MAVLINK_MSG_ID_ALTITUDE_LEN, MAVLINK_MSG_ID_ALTITUDE_CRC);
  227. #else
  228. mavlink_altitude_t *packet = (mavlink_altitude_t *)msgbuf;
  229. packet->time_usec = time_usec;
  230. packet->altitude_monotonic = altitude_monotonic;
  231. packet->altitude_amsl = altitude_amsl;
  232. packet->altitude_local = altitude_local;
  233. packet->altitude_relative = altitude_relative;
  234. packet->altitude_terrain = altitude_terrain;
  235. packet->bottom_clearance = bottom_clearance;
  236. _mav_finalize_message_chan_send(chan, MAVLINK_MSG_ID_ALTITUDE, (const char *)packet, MAVLINK_MSG_ID_ALTITUDE_MIN_LEN, MAVLINK_MSG_ID_ALTITUDE_LEN, MAVLINK_MSG_ID_ALTITUDE_CRC);
  237. #endif
  238. }
  239. #endif
  240. #endif
  241. // MESSAGE ALTITUDE UNPACKING
  242. /**
  243. * @brief Get field time_usec from altitude message
  244. *
  245. * @return [us] Timestamp (UNIX Epoch time or time since system boot). The receiving end can infer timestamp format (since 1.1.1970 or since system boot) by checking for the magnitude of the number.
  246. */
  247. static inline uint64_t mavlink_msg_altitude_get_time_usec(const mavlink_message_t* msg)
  248. {
  249. return _MAV_RETURN_uint64_t(msg, 0);
  250. }
  251. /**
  252. * @brief Get field altitude_monotonic from altitude message
  253. *
  254. * @return [m] This altitude measure is initialized on system boot and monotonic (it is never reset, but represents the local altitude change). The only guarantee on this field is that it will never be reset and is consistent within a flight. The recommended value for this field is the uncorrected barometric altitude at boot time. This altitude will also drift and vary between flights.
  255. */
  256. static inline float mavlink_msg_altitude_get_altitude_monotonic(const mavlink_message_t* msg)
  257. {
  258. return _MAV_RETURN_float(msg, 8);
  259. }
  260. /**
  261. * @brief Get field altitude_amsl from altitude message
  262. *
  263. * @return [m] This altitude measure is strictly above mean sea level and might be non-monotonic (it might reset on events like GPS lock or when a new QNH value is set). It should be the altitude to which global altitude waypoints are compared to. Note that it is *not* the GPS altitude, however, most GPS modules already output MSL by default and not the WGS84 altitude.
  264. */
  265. static inline float mavlink_msg_altitude_get_altitude_amsl(const mavlink_message_t* msg)
  266. {
  267. return _MAV_RETURN_float(msg, 12);
  268. }
  269. /**
  270. * @brief Get field altitude_local from altitude message
  271. *
  272. * @return [m] This is the local altitude in the local coordinate frame. It is not the altitude above home, but in reference to the coordinate origin (0, 0, 0). It is up-positive.
  273. */
  274. static inline float mavlink_msg_altitude_get_altitude_local(const mavlink_message_t* msg)
  275. {
  276. return _MAV_RETURN_float(msg, 16);
  277. }
  278. /**
  279. * @brief Get field altitude_relative from altitude message
  280. *
  281. * @return [m] This is the altitude above the home position. It resets on each change of the current home position.
  282. */
  283. static inline float mavlink_msg_altitude_get_altitude_relative(const mavlink_message_t* msg)
  284. {
  285. return _MAV_RETURN_float(msg, 20);
  286. }
  287. /**
  288. * @brief Get field altitude_terrain from altitude message
  289. *
  290. * @return [m] This is the altitude above terrain. It might be fed by a terrain database or an altimeter. Values smaller than -1000 should be interpreted as unknown.
  291. */
  292. static inline float mavlink_msg_altitude_get_altitude_terrain(const mavlink_message_t* msg)
  293. {
  294. return _MAV_RETURN_float(msg, 24);
  295. }
  296. /**
  297. * @brief Get field bottom_clearance from altitude message
  298. *
  299. * @return [m] This is not the altitude, but the clear space below the system according to the fused clearance estimate. It generally should max out at the maximum range of e.g. the laser altimeter. It is generally a moving target. A negative value indicates no measurement available.
  300. */
  301. static inline float mavlink_msg_altitude_get_bottom_clearance(const mavlink_message_t* msg)
  302. {
  303. return _MAV_RETURN_float(msg, 28);
  304. }
  305. /**
  306. * @brief Decode a altitude message into a struct
  307. *
  308. * @param msg The message to decode
  309. * @param altitude C-struct to decode the message contents into
  310. */
  311. static inline void mavlink_msg_altitude_decode(const mavlink_message_t* msg, mavlink_altitude_t* altitude)
  312. {
  313. #if MAVLINK_NEED_BYTE_SWAP || !MAVLINK_ALIGNED_FIELDS
  314. altitude->time_usec = mavlink_msg_altitude_get_time_usec(msg);
  315. altitude->altitude_monotonic = mavlink_msg_altitude_get_altitude_monotonic(msg);
  316. altitude->altitude_amsl = mavlink_msg_altitude_get_altitude_amsl(msg);
  317. altitude->altitude_local = mavlink_msg_altitude_get_altitude_local(msg);
  318. altitude->altitude_relative = mavlink_msg_altitude_get_altitude_relative(msg);
  319. altitude->altitude_terrain = mavlink_msg_altitude_get_altitude_terrain(msg);
  320. altitude->bottom_clearance = mavlink_msg_altitude_get_bottom_clearance(msg);
  321. #else
  322. uint8_t len = msg->len < MAVLINK_MSG_ID_ALTITUDE_LEN? msg->len : MAVLINK_MSG_ID_ALTITUDE_LEN;
  323. memset(altitude, 0, MAVLINK_MSG_ID_ALTITUDE_LEN);
  324. memcpy(altitude, _MAV_PAYLOAD(msg), len);
  325. #endif
  326. }