/*
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see .
*/
/*
support for serial connected AHRS systems
*/
#define ALLOW_DOUBLE_MATH_FUNCTIONS
#include "AP_ExternalAHRS_config.h"
#if AP_EXTERNAL_AHRS_VECTORNAV_ENABLED
#include "AP_ExternalAHRS_VectorNav.h"
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
extern const AP_HAL::HAL &hal;
/*
TYPE::VN_AHRS configures 2 packets: high-rate IMU and mid-rate EKF
Header for IMU packet
$VNWRG,75,3,16,01,0721*D415
Common group (Group 1)
TimeStartup
AngularRate
Accel
Imu
MagPres
Header for EKF packet
$VNWRG,76,3,16,11,0001,0106*B36B
Common group (Group 1)
TimeStartup
Attitude group (Group 4)
Ypr
Quaternion
YprU
*/
struct PACKED VN_IMU_packet {
static constexpr uint8_t header[]{0x01, 0x21, 0x07};
uint64_t timeStartup;
float gyro[3];
float accel[3];
float uncompAccel[3];
float uncompAngRate[3];
float mag[3];
float temp;
float pressure;
};
constexpr uint8_t VN_IMU_packet::header[];
constexpr uint8_t VN_IMU_LENGTH = sizeof(VN_IMU_packet) + sizeof(VN_IMU_packet::header) + 1 + 2; // Includes sync byte and CRC
struct PACKED VN_AHRS_ekf_packet {
static constexpr uint8_t header[]{0x11, 0x01, 0x00, 0x06, 0x01};
uint64_t timeStartup;
float ypr[3];
float quaternion[4];
float yprU[3];
};
constexpr uint8_t VN_AHRS_ekf_packet::header[];
constexpr uint8_t VN_AHRS_EKF_LENGTH = sizeof(VN_AHRS_ekf_packet) + sizeof(VN_AHRS_ekf_packet::header) + 1 + 2; // Includes sync byte and CRC
/*
TYPE::VN_INS configures 3 packets: high-rate IMU, mid-rate EKF, and 5Hz GNSS
Header for IMU packet
$VNWRG,75,3,16,01,0721*D415
Common group (Group 1)
TimeStartup
AngularRate
Accel
Imu
MagPres
Header for EKF packet
$VNWRG,76,3,16,31,0001,0106,0613*097A
Common group (Group 1)
TimeStartup
Attitude group (Group 4)
Ypr
Quaternion
YprU
Ins group (Group 5)
InsStatus
PosLla
VelNed
PosU
VelU
Header for GNSS packet
$VNWRG,77,1,160,49,0003,26B8,0018*4FD9
Common group (Group 1)
TimeStartup
TimeGps
Gnss1 group (Group 3)
NumSats
GnssFix
GnssPosLla
GnssVelNed
PosU1
VelU1
GnssDop
Gnss2 group (Group 6)
NumSats
GnssFix
*/
union Ins_Status {
uint16_t _value;
struct {
uint16_t mode : 2;
uint16_t gnssFix : 1;
uint16_t resv1 : 2;
uint16_t imuErr : 1;
uint16_t magPresErr : 1;
uint16_t gnssErr : 1;
uint16_t resv2 : 1;
uint16_t gnssHeadingIns : 2;
};
};
struct PACKED VN_INS_ekf_packet {
static constexpr uint8_t header[]{0x31, 0x01, 0x00, 0x06, 0x01, 0x13, 0x06};
uint64_t timeStartup;
float ypr[3];
float quaternion[4];
float yprU[3];
uint16_t insStatus;
double posLla[3];
float velNed[3];
float posU;
float velU;
};
constexpr uint8_t VN_INS_ekf_packet::header[];
constexpr uint8_t VN_INS_EKF_LENGTH = sizeof(VN_INS_ekf_packet) + sizeof(VN_INS_ekf_packet::header) + 1 + 2; // Includes sync byte and CRC
struct PACKED VN_INS_gnss_packet {
static constexpr uint8_t header[]{0x49, 0x03, 0x00, 0xB8, 0x26, 0x18, 0x00};
uint64_t timeStartup;
uint64_t timeGps;
uint8_t numSats1;
uint8_t fix1;
double posLla1[3];
float velNed1[3];
float posU1[3];
float velU1;
float dop1[7];
uint8_t numSats2;
uint8_t fix2;
};
constexpr uint8_t VN_INS_gnss_packet::header[];
constexpr uint8_t VN_INS_GNSS_LENGTH = sizeof(VN_INS_gnss_packet) + sizeof(VN_INS_gnss_packet::header) + 1 + 2; // Includes sync byte and CRC
// constructor
AP_ExternalAHRS_VectorNav::AP_ExternalAHRS_VectorNav(AP_ExternalAHRS *_frontend,
AP_ExternalAHRS::state_t &_state) :
AP_ExternalAHRS_backend(_frontend, _state)
{
auto &sm = AP::serialmanager();
uart = sm.find_serial(AP_SerialManager::SerialProtocol_AHRS, 0);
if (!uart) {
GCS_SEND_TEXT(MAV_SEVERITY_INFO, "VectorNav ExternalAHRS no UART");
return;
}
baudrate = sm.find_baudrate(AP_SerialManager::SerialProtocol_AHRS, 0);
port_num = sm.find_portnum(AP_SerialManager::SerialProtocol_AHRS, 0);
bufsize = MAX(MAX(MAX(VN_IMU_LENGTH, VN_INS_EKF_LENGTH), VN_INS_GNSS_LENGTH), VN_AHRS_EKF_LENGTH);
pktbuf = NEW_NOTHROW uint8_t[bufsize];
latest_ins_ekf_packet = NEW_NOTHROW VN_INS_ekf_packet;
latest_ins_gnss_packet = NEW_NOTHROW VN_INS_gnss_packet;
if (!pktbuf || !latest_ins_ekf_packet) {
AP_BoardConfig::allocation_error("VectorNav ExternalAHRS");
}
if (!hal.scheduler->thread_create(FUNCTOR_BIND_MEMBER(&AP_ExternalAHRS_VectorNav::update_thread, void), "AHRS", 2048, AP_HAL::Scheduler::PRIORITY_SPI, 0)) {
AP_HAL::panic("VectorNav Failed to start ExternalAHRS update thread");
}
GCS_SEND_TEXT(MAV_SEVERITY_INFO, "VectorNav ExternalAHRS initialised");
}
/*
check the UART for more data
returns true if the function should be called again straight away
*/
#define SYNC_BYTE 0xFA
bool AP_ExternalAHRS_VectorNav::check_uart()
{
if (!setup_complete) {
return false;
}
WITH_SEMAPHORE(state.sem);
// ensure we own the uart
uart->begin(0);
uint32_t n = uart->available();
if (n == 0) {
return false;
}
if (pktoffset < bufsize) {
ssize_t nread = uart->read(&pktbuf[pktoffset], MIN(n, unsigned(bufsize-pktoffset)));
if (nread <= 0) {
return false;
}
pktoffset += nread;
}
bool match_header1 = false;
bool match_header2 = false;
bool match_header3 = false;
bool match_header4 = false;
if (pktbuf[0] != SYNC_BYTE) {
goto reset;
}
match_header1 = (0 == memcmp(&pktbuf[1], VN_IMU_packet::header, MIN(sizeof(VN_IMU_packet::header), unsigned(pktoffset - 1))));
if (type == TYPE::VN_AHRS) {
match_header2 = (0 == memcmp(&pktbuf[1], VN_AHRS_ekf_packet::header, MIN(sizeof(VN_AHRS_ekf_packet::header), unsigned(pktoffset - 1))));
} else {
match_header3 = (0 == memcmp(&pktbuf[1], VN_INS_ekf_packet::header, MIN(sizeof(VN_INS_ekf_packet::header), unsigned(pktoffset - 1))));
match_header4 = (0 == memcmp(&pktbuf[1], VN_INS_gnss_packet::header, MIN(sizeof(VN_INS_gnss_packet::header), unsigned(pktoffset - 1))));
}
if (!match_header1 && !match_header2 && !match_header3 && !match_header4) {
goto reset;
}
if (match_header1 && pktoffset >= VN_IMU_LENGTH) {
uint16_t crc = crc16_ccitt(&pktbuf[1], VN_IMU_LENGTH - 1, 0);
if (crc == 0) {
process_imu_packet(&pktbuf[sizeof(VN_IMU_packet::header) + 1]);
memmove(&pktbuf[0], &pktbuf[VN_IMU_LENGTH], pktoffset - VN_IMU_LENGTH);
pktoffset -= VN_IMU_LENGTH;
} else {
goto reset;
}
} else if (match_header2 && pktoffset >= VN_AHRS_EKF_LENGTH) {
uint16_t crc = crc16_ccitt(&pktbuf[1], VN_AHRS_EKF_LENGTH - 1, 0);
if (crc == 0) {
process_ahrs_ekf_packet(&pktbuf[sizeof(VN_AHRS_ekf_packet::header) + 1]);
memmove(&pktbuf[0], &pktbuf[VN_AHRS_EKF_LENGTH], pktoffset - VN_AHRS_EKF_LENGTH);
pktoffset -= VN_AHRS_EKF_LENGTH;
} else {
goto reset;
}
} else if (match_header3 && pktoffset >= VN_INS_EKF_LENGTH) {
uint16_t crc = crc16_ccitt(&pktbuf[1], VN_INS_EKF_LENGTH - 1, 0);
if (crc == 0) {
process_ins_ekf_packet(&pktbuf[sizeof(VN_INS_ekf_packet::header) + 1]);
memmove(&pktbuf[0], &pktbuf[VN_INS_EKF_LENGTH], pktoffset - VN_INS_EKF_LENGTH);
pktoffset -= VN_INS_EKF_LENGTH;
} else {
goto reset;
}
} else if (match_header4 && pktoffset >= VN_INS_GNSS_LENGTH) {
uint16_t crc = crc16_ccitt(&pktbuf[1], VN_INS_GNSS_LENGTH - 1, 0);
if (crc == 0) {
process_ins_gnss_packet(&pktbuf[sizeof(VN_INS_gnss_packet::header) + 1]);
memmove(&pktbuf[0], &pktbuf[VN_INS_GNSS_LENGTH], pktoffset - VN_INS_GNSS_LENGTH);
pktoffset -= VN_INS_GNSS_LENGTH;
} else {
goto reset;
}
}
return true;
reset:
uint8_t *p = (uint8_t *)memchr(&pktbuf[1], SYNC_BYTE, pktoffset-1);
if (p) {
uint8_t newlen = pktoffset - (p - pktbuf);
memmove(&pktbuf[0], p, newlen);
pktoffset = newlen;
} else {
pktoffset = 0;
}
return true;
}
// Send command and wait for response
// Only run from thread! This blocks and retries until a non-error response is received
#define READ_REQUEST_RETRY_MS 500
void AP_ExternalAHRS_VectorNav::run_command(const char * fmt, ...)
{
va_list ap;
va_start(ap, fmt);
hal.util->vsnprintf(message_to_send, sizeof(message_to_send), fmt, ap);
va_end(ap);
uint32_t request_sent = 0;
while (true) {
hal.scheduler->delay(1);
const uint32_t now = AP_HAL::millis();
if (now - request_sent > READ_REQUEST_RETRY_MS) {
nmea_printf(uart, "$%s", message_to_send);
request_sent = now;
}
int16_t nbytes = uart->available();
while (nbytes-- > 0) {
char c = uart->read();
if (decode(c)) {
if (nmea.error_response && nmea.sentence_done) {
// Received a valid VNERR. Try to resend after the timeout length
break;
}
return;
}
}
}
}
// add a single character to the buffer and attempt to decode
// returns true if a complete sentence was successfully decoded
bool AP_ExternalAHRS_VectorNav::decode(char c)
{
switch (c) {
case ',':
// end of a term, add to checksum
nmea.checksum ^= c;
FALLTHROUGH;
case '\r':
case '\n':
case '*':
{
if (nmea.sentence_done) {
return false;
}
if (nmea.term_is_checksum) {
nmea.sentence_done = true;
uint8_t checksum = 16 * char_to_hex(nmea.term[0]) + char_to_hex(nmea.term[1]);
return ((checksum == nmea.checksum) && nmea.sentence_valid);
}
// null terminate and decode latest term
nmea.term[nmea.term_offset] = 0;
if (nmea.sentence_valid) {
nmea.sentence_valid = decode_latest_term();
}
// move onto next term
nmea.term_number++;
nmea.term_offset = 0;
nmea.term_is_checksum = (c == '*');
return false;
}
case '$': // sentence begin
nmea.sentence_valid = true;
nmea.term_number = 0;
nmea.term_offset = 0;
nmea.checksum = 0;
nmea.term_is_checksum = false;
nmea.sentence_done = false;
nmea.error_response = false;
return false;
}
// ordinary characters are added to term
if (nmea.term_offset < sizeof(nmea.term) - 1) {
nmea.term[nmea.term_offset++] = c;
}
if (!nmea.term_is_checksum) {
nmea.checksum ^= c;
}
return false;
}
// decode the most recently consumed term
// returns true if new term is valid
bool AP_ExternalAHRS_VectorNav::decode_latest_term()
{
// Check the first two terms (In most cases header + reg number) that they match the sent
// message. If not, the response is invalid.
switch (nmea.term_number) {
case 0:
if (strncmp(nmea.term, "VNERR", nmea.term_offset) == 0) {
nmea.error_response = true; // Message will be printed on next term
} else if (strncmp(nmea.term, message_to_send, nmea.term_offset) != 0) {
return false;
}
return true;
case 1:
if (nmea.error_response) {
GCS_SEND_TEXT(MAV_SEVERITY_CRITICAL, "VectorNav received VNERR code: %s", nmea.term);
} else if (strlen(message_to_send) > 6 &&
strncmp(nmea.term, &message_to_send[6], nmea.term_offset) != 0) { // Start after "VNXXX,"
return false;
}
return true;
case 2:
if (strncmp(nmea.term, "VN-", 3) == 0) {
// This term is the model number
strncpy(model_name, nmea.term, sizeof(model_name));
}
return true;
default:
return true;
}
}
void AP_ExternalAHRS_VectorNav::initialize() {
// Open port in the thread
uart->begin(baudrate, 1024, 512);
// Pause asynchronous communications to simplify packet finding
run_command("VNASY,0");
// Stop ASCII async outputs for both UARTs. If only active UART is disabled, we get a baudrate
// overflow on the other UART when configuring binary outputs (reg 75 and 76) to both UARTs
run_command("VNWRG,06,0,1");
run_command("VNWRG,06,0,2");
// Read Model Number Register, ID 1
run_command("VNRRG,01");
// Setup for messages respective model types (on both UARTs)
if (strncmp(model_name, "VN-1", 4) == 0) {
// VN-1X0
type = TYPE::VN_AHRS;
// These assumes unit is still configured at its default rate of 800hz
run_command("VNWRG,75,3,%u,01,0721", unsigned(800 / get_rate()));
run_command("VNWRG,76,3,16,11,0001,0106");
} else {
// Default to setup for sensors other than VN-100 or VN-110
// This assumes unit is still configured at its default IMU rate of 400hz for VN-300, 800hz for others
uint16_t imu_rate = 800; // Default for everything but VN-300
if (strncmp(model_name, "VN-300", 6) == 0) {
imu_rate = 400;
}
if (strncmp(model_name, "VN-3", 4) == 0) {
has_dual_gnss = true;
}
run_command("VNWRG,75,3,%u,01,0721", unsigned(imu_rate / get_rate()));
run_command("VNWRG,76,3,%u,31,0001,0106,0613", unsigned(imu_rate / 50));
run_command("VNWRG,77,3,%u,49,0003,26B8,0018", unsigned(imu_rate / 5));
}
// Resume asynchronous communications
run_command("VNASY,1");
setup_complete = true;
}
void AP_ExternalAHRS_VectorNav::update_thread() {
initialize();
while (true) {
if (!check_uart()) {
hal.scheduler->delay(1);
}
}
}
const char* AP_ExternalAHRS_VectorNav::get_name() const
{
if (setup_complete) {
return model_name;
}
return nullptr;
}
// Input data struct for EAHA logging message, used by both AHRS mode and INS mode
struct AP_ExternalAHRS_VectorNav::VNAT {
uint64_t timeUs;
float quat[4];
float ypr[3];
float yprU[3];
};
void AP_ExternalAHRS_VectorNav::write_vnat(const VNAT& data_to_log) const {
#if HAL_LOGGING_ENABLED
// @LoggerMessage: VNAT
// @Description: VectorNav Attitude data
// @Field: TimeUS: Time since system startup
// @Field: Q1: Attitude quaternion 1
// @Field: Q2: Attitude quaternion 2
// @Field: Q3: Attitude quaternion 3
// @Field: Q4: Attitude quaternion 4
// @Field: Yaw: Yaw
// @Field: Pitch: Pitch
// @Field: Roll: Roll
// @Field: YU: Yaw unceratainty
// @Field: PU: Pitch uncertainty
// @Field: RU: Roll uncertainty
AP::logger().WriteStreaming("VNAT", "TimeUS,Q1,Q2,Q3,Q4,Yaw,Pitch,Roll,YU,PU,RU",
"s----dddddd", "F0000000000",
"Qffffffffff",
data_to_log.timeUs,
data_to_log.quat[0], data_to_log.quat[1], data_to_log.quat[2], data_to_log.quat[3],
data_to_log.ypr[0], data_to_log.ypr[1], data_to_log.ypr[2],
data_to_log.yprU[0], data_to_log.yprU[1], data_to_log.yprU[2]);
#endif
}
// process INS mode INS packet
void AP_ExternalAHRS_VectorNav::process_imu_packet(const uint8_t *b)
{
const struct VN_IMU_packet &pkt = *(struct VN_IMU_packet *)b;
last_pkt1_ms = AP_HAL::millis();
const bool use_uncomp = option_is_set(AP_ExternalAHRS::OPTIONS::VN_UNCOMP_IMU);
{
WITH_SEMAPHORE(state.sem);
if (use_uncomp) {
state.accel = Vector3f{pkt.uncompAccel[0], pkt.uncompAccel[1], pkt.uncompAccel[2]};
state.gyro = Vector3f{pkt.uncompAngRate[0], pkt.uncompAngRate[1], pkt.uncompAngRate[2]};
} else {
state.accel = Vector3f{pkt.accel[0], pkt.accel[1], pkt.accel[2]};
state.gyro = Vector3f{pkt.gyro[0], pkt.gyro[1], pkt.gyro[2]};
}
}
#if AP_BARO_EXTERNALAHRS_ENABLED
{
AP_ExternalAHRS::baro_data_message_t baro;
baro.instance = 0;
baro.pressure_pa = pkt.pressure * 1e3;
baro.temperature = pkt.temp;
AP::baro().handle_external(baro);
}
#endif
#if AP_COMPASS_EXTERNALAHRS_ENABLED
{
AP_ExternalAHRS::mag_data_message_t mag;
mag.field = Vector3f{pkt.mag[0], pkt.mag[1], pkt.mag[2]};
mag.field *= 1000; // to mGauss
AP::compass().handle_external(mag);
}
#endif
{
AP_ExternalAHRS::ins_data_message_t ins;
ins.accel = state.accel;
ins.gyro = state.gyro;
ins.temperature = pkt.temp;
AP::ins().handle_external(ins);
}
#if HAL_LOGGING_ENABLED
// @LoggerMessage: VNIM
// @Description: VectorNav IMU data
// @Field: TimeUS: Time since system startup
// @Field: Temp: Temprature
// @Field: Pres: Pressure
// @Field: MX: Magnetic feild X-axis
// @Field: MY: Magnetic feild Y-axis
// @Field: MZ: Magnetic feild Z-axis
// @Field: AX: Acceleration X-axis
// @Field: AY: Acceleration Y-axis
// @Field: AZ: Acceleration Z-axis
// @Field: GX: Rotation rate X-axis
// @Field: GY: Rotation rate Y-axis
// @Field: GZ: Rotation rate Z-axis
AP::logger().WriteStreaming("VNIM", "TimeUS,Temp,Pres,MX,MY,MZ,AX,AY,AZ,GX,GY,GZ",
"sdPGGGoooEEE", "F00000000000",
"Qfffffffffff",
AP_HAL::micros64(),
pkt.temp, pkt.pressure*1e3,
pkt.mag[0], pkt.mag[1], pkt.mag[2],
state.accel[0], state.accel[1], state.accel[2],
state.gyro[0], state.gyro[1], state.gyro[2],
state.quat[0], state.quat[1], state.quat[2], state.quat[3]);
#endif // HAL_LOGGING_ENABLED
}
// process AHRS mode AHRS packet
void AP_ExternalAHRS_VectorNav::process_ahrs_ekf_packet(const uint8_t *b) {
const struct VN_AHRS_ekf_packet &pkt = *(struct VN_AHRS_ekf_packet *)b;
last_pkt2_ms = AP_HAL::millis();
state.quat = Quaternion{pkt.quaternion[3], pkt.quaternion[0], pkt.quaternion[1], pkt.quaternion[2]};
state.have_quaternion = true;
#if HAL_LOGGING_ENABLED
VNAT data_to_log;
data_to_log.timeUs = AP_HAL::micros64();
memcpy(data_to_log.quat, pkt.quaternion, sizeof(pkt.quaternion));
memcpy(data_to_log.ypr, pkt.ypr, sizeof(pkt.ypr));
memcpy(data_to_log.yprU, pkt.yprU, sizeof(pkt.yprU));
write_vnat(data_to_log);
#endif // HAL_LOGGING_ENABLED
}
// process INS mode EKF packet
void AP_ExternalAHRS_VectorNav::process_ins_ekf_packet(const uint8_t *b) {
const struct VN_INS_ekf_packet &pkt = *(struct VN_INS_ekf_packet *)b;
last_pkt2_ms = AP_HAL::millis();
*latest_ins_ekf_packet = pkt;
state.quat = Quaternion{pkt.quaternion[3], pkt.quaternion[0], pkt.quaternion[1], pkt.quaternion[2]};
state.have_quaternion = true;
state.velocity = Vector3f{pkt.velNed[0], pkt.velNed[1], pkt.velNed[2]};
state.have_velocity = true;
state.location = Location{int32_t(pkt.posLla[0] * 1.0e7), int32_t(pkt.posLla[1] * 1.0e7), int32_t(pkt.posLla[2] * 1.0e2), Location::AltFrame::ABSOLUTE};
state.last_location_update_us = AP_HAL::micros();
state.have_location = true;
#if HAL_LOGGING_ENABLED
VNAT data_to_log;
auto now = AP_HAL::micros64();
data_to_log.timeUs = now;
memcpy(data_to_log.quat, pkt.quaternion, sizeof(pkt.quaternion));
memcpy(data_to_log.ypr, pkt.ypr, sizeof(pkt.ypr));
memcpy(data_to_log.yprU, pkt.yprU, sizeof(pkt.yprU));
write_vnat(data_to_log);
// @LoggerMessage: VNKF
// @Description: VectorNav INS Kalman Filter data
// @Field: TimeUS: Time since system startup
// @Field: InsStatus: VectorNav INS health status
// @Field: Lat: Latitude
// @Field: Lon: Longitude
// @Field: Alt: Altitude
// @Field: VelN: Velocity Northing
// @Field: VelE: Velocity Easting
// @Field: VelD: Velocity Downing
// @Field: PosU: Filter estimated position uncertainty
// @Field: VelU: Filter estimated Velocity uncertainty
AP::logger().WriteStreaming("VNKF", "TimeUS,InsStatus,Lat,Lon,Alt,VelN,VelE,VelD,PosU,VelU",
"s-ddmnnndn", "F000000000",
"QHdddfffff",
now,
pkt.insStatus,
pkt.posLla[0], pkt.posLla[1], pkt.posLla[2],
pkt.velNed[0], pkt.velNed[1], pkt.velNed[2],
pkt.posU, pkt.velU);
#endif // HAL_LOGGING_ENABLED
}
// process INS mode GNSS packet
void AP_ExternalAHRS_VectorNav::process_ins_gnss_packet(const uint8_t *b) {
const struct VN_INS_gnss_packet &pkt = *(struct VN_INS_gnss_packet *)b;
AP_ExternalAHRS::gps_data_message_t gps;
last_pkt3_ms = AP_HAL::millis();
*latest_ins_gnss_packet = pkt;
// get ToW in milliseconds
gps.gps_week = pkt.timeGps / (AP_MSEC_PER_WEEK * 1000000ULL);
gps.ms_tow = (pkt.timeGps / 1000000ULL) % (60 * 60 * 24 * 7 * 1000ULL);
gps.fix_type = pkt.fix1;
gps.satellites_in_view = pkt.numSats1;
gps.horizontal_pos_accuracy = pkt.posU1[0];
gps.vertical_pos_accuracy = pkt.posU1[2];
gps.horizontal_vel_accuracy = pkt.velU1;
gps.hdop = pkt.dop1[4];
gps.vdop = pkt.dop1[3];
gps.latitude = pkt.posLla1[0] * 1.0e7;
gps.longitude = pkt.posLla1[1] * 1.0e7;
gps.msl_altitude = pkt.posLla1[2] * 1.0e2;
gps.ned_vel_north = pkt.velNed1[0];
gps.ned_vel_east = pkt.velNed1[1];
gps.ned_vel_down = pkt.velNed1[2];
if (!state.have_origin && gps.fix_type >= 3) {
WITH_SEMAPHORE(state.sem);
state.origin = Location{int32_t(pkt.posLla1[0] * 1.0e7), int32_t(pkt.posLla1[1] * 1.0e7),
int32_t(pkt.posLla1[2] * 1.0e2), Location::AltFrame::ABSOLUTE};
state.have_origin = true;
}
uint8_t instance;
if (AP::gps().get_first_external_instance(instance)) {
AP::gps().handle_external(gps, instance);
}
}
// get serial port number for the uart
int8_t AP_ExternalAHRS_VectorNav::get_port(void) const
{
if (!uart) {
return -1;
}
return port_num;
};
// accessors for AP_AHRS
bool AP_ExternalAHRS_VectorNav::healthy(void) const
{
const uint32_t now = AP_HAL::millis();
return (now - last_pkt1_ms < 40) && (now - last_pkt2_ms < 500) && (type == TYPE::VN_AHRS ? true: now - last_pkt3_ms < 1000);
}
bool AP_ExternalAHRS_VectorNav::initialised(void) const
{
if (!setup_complete) {
return false;
}
return last_pkt1_ms != UINT32_MAX && last_pkt2_ms != UINT32_MAX && (type == TYPE::VN_AHRS ? true : last_pkt3_ms != UINT32_MAX);
}
bool AP_ExternalAHRS_VectorNav::pre_arm_check(char *failure_msg, uint8_t failure_msg_len) const
{
if (!setup_complete) {
hal.util->snprintf(failure_msg, failure_msg_len, "VectorNav setup failed");
return false;
}
if (!healthy()) {
hal.util->snprintf(failure_msg, failure_msg_len, "VectorNav unhealthy");
return false;
}
if (type == TYPE::VN_INS) {
if (latest_ins_gnss_packet->fix1 < 3) {
hal.util->snprintf(failure_msg, failure_msg_len, "VectorNav no GPS1 lock");
return false;
}
if (has_dual_gnss && (latest_ins_gnss_packet->fix2 < 3)) {
hal.util->snprintf(failure_msg, failure_msg_len, "VectorNav no GPS2 lock");
return false;
}
}
return true;
}
/*
get filter status. We don't know the meaning of the status bits yet,
so assume all OK if we have GPS lock
*/
void AP_ExternalAHRS_VectorNav::get_filter_status(nav_filter_status &status) const
{
memset(&status, 0, sizeof(status));
status.flags.initalized = initialised();
if (healthy()) {
if (type == TYPE::VN_AHRS) {
status.flags.attitude = true;
} else {
status.flags.attitude = true;
if (latest_ins_ekf_packet) {
status.flags.vert_vel = true;
status.flags.vert_pos = true;
status.flags.horiz_vel = true;
status.flags.horiz_pos_rel = true;
status.flags.horiz_pos_abs = true;
status.flags.pred_horiz_pos_rel = true;
status.flags.pred_horiz_pos_abs = true;
status.flags.using_gps = true;
}
}
}
}
// send an EKF_STATUS message to GCS
void AP_ExternalAHRS_VectorNav::send_status_report(GCS_MAVLINK &link) const
{
if (!latest_ins_ekf_packet) {
return;
}
// prepare flags
uint16_t flags = 0;
nav_filter_status filterStatus;
get_filter_status(filterStatus);
if (filterStatus.flags.attitude) {
flags |= EKF_ATTITUDE;
}
if (filterStatus.flags.horiz_vel) {
flags |= EKF_VELOCITY_HORIZ;
}
if (filterStatus.flags.vert_vel) {
flags |= EKF_VELOCITY_VERT;
}
if (filterStatus.flags.horiz_pos_rel) {
flags |= EKF_POS_HORIZ_REL;
}
if (filterStatus.flags.horiz_pos_abs) {
flags |= EKF_POS_HORIZ_ABS;
}
if (filterStatus.flags.vert_pos) {
flags |= EKF_POS_VERT_ABS;
}
if (filterStatus.flags.terrain_alt) {
flags |= EKF_POS_VERT_AGL;
}
if (filterStatus.flags.const_pos_mode) {
flags |= EKF_CONST_POS_MODE;
}
if (filterStatus.flags.pred_horiz_pos_rel) {
flags |= EKF_PRED_POS_HORIZ_REL;
}
if (filterStatus.flags.pred_horiz_pos_abs) {
flags |= EKF_PRED_POS_HORIZ_ABS;
}
if (!filterStatus.flags.initalized) {
flags |= EKF_UNINITIALIZED;
}
// send message
const struct VN_INS_ekf_packet &pkt = *(struct VN_INS_ekf_packet *)latest_ins_ekf_packet;
const float vel_gate = 5;
const float pos_gate = 5;
const float hgt_gate = 5;
const float mag_var = 0;
mavlink_msg_ekf_status_report_send(link.get_chan(), flags,
pkt.velU / vel_gate, pkt.posU / pos_gate, pkt.posU / hgt_gate,
mag_var, 0, 0);
}
#endif // AP_EXTERNAL_AHRS_VECTORNAV_ENABLED