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Use NAV-PVT with ubx7 and ubx8 modules 

This replaces NAV-SOL, NAV-POSLLH, NAV-VELNED and NAV-TIMEUTC.
This commit is contained in:
Kynos 2014-07-03 13:33:29 +02:00
parent 23164228c8
commit 1cca3ca8a5
5 changed files with 113 additions and 25 deletions
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1
src/drivers/gps/gps.cpp
View File

@ -299,7 +299,6 @@ GPS::task_main()
_report_gps_pos.alt = (int32_t)1200e3f;
_report_gps_pos.timestamp_variance = hrt_absolute_time();
_report_gps_pos.s_variance_m_s = 10.0f;
_report_gps_pos.p_variance_m = 10.0f;
_report_gps_pos.c_variance_rad = 0.1f;
_report_gps_pos.fix_type = 3;
_report_gps_pos.eph = 0.9f;

105
src/drivers/gps/ubx.cpp
View File

@ -95,7 +95,8 @@ UBX::UBX(const int &fd, struct vehicle_gps_position_s *gps_position, struct sate
_got_velned(false),
_disable_cmd_last(0),
_ack_waiting_msg(0),
_ubx_version(0)
_ubx_version(0),
_use_nav_pvt(false)
{
decode_init();
}
@ -190,38 +191,45 @@ UBX::configure(unsigned &baudrate)
/* configure message rates */
/* the last argument is divisor for measurement rate (set by CFG RATE), i.e. 1 means 5Hz */
configure_message_rate(UBX_MSG_NAV_POSLLH, 1);
/* try to set rate for NAV-PVT */
/* (implemented for ubx7+ modules only, use NAV-SOL, NAV-POSLLH, NAV-VELNED and NAV-TIMEUTC for ubx6) */
configure_message_rate(UBX_MSG_NAV_PVT, 1);
if (wait_for_ack(UBX_MSG_CFG_MSG, UBX_CONFIG_TIMEOUT, true) < 0) {
_use_nav_pvt = false;
} else {
_use_nav_pvt = true;
}
UBX_WARN("%susing NAV-PVT", _use_nav_pvt ? "" : "not ");
if (!_use_nav_pvt) {
configure_message_rate(UBX_MSG_NAV_TIMEUTC, 5);
if (wait_for_ack(UBX_MSG_CFG_MSG, UBX_CONFIG_TIMEOUT, true) < 0) {
return 1;
}
configure_message_rate(UBX_MSG_NAV_TIMEUTC, 5);
configure_message_rate(UBX_MSG_NAV_POSLLH, 1);
if (wait_for_ack(UBX_MSG_CFG_MSG, UBX_CONFIG_TIMEOUT, true) < 0) {
return 1;
}
configure_message_rate(UBX_MSG_NAV_SOL, 1);
if (wait_for_ack(UBX_MSG_CFG_MSG, UBX_CONFIG_TIMEOUT, true) < 0) {
return 1;
}
configure_message_rate(UBX_MSG_NAV_VELNED, 1);
if (wait_for_ack(UBX_MSG_CFG_MSG, UBX_CONFIG_TIMEOUT, true) < 0) {
return 1;
}
}
configure_message_rate(UBX_MSG_NAV_SVINFO, (_satellite_info != nullptr) ? 5 : 0);
if (wait_for_ack(UBX_MSG_CFG_MSG, UBX_CONFIG_TIMEOUT, true) < 0) {
return 1;
}
configure_message_rate(UBX_MSG_MON_HW, 1);
if (wait_for_ack(UBX_MSG_CFG_MSG, UBX_CONFIG_TIMEOUT, true) < 0) {
return 1;
}
@ -454,11 +462,23 @@ UBX::payload_rx_init()
_rx_state = UBX_RXMSG_HANDLE; // handle by default
switch (_rx_msg) {
case UBX_MSG_NAV_PVT:
if ( (_rx_payload_length != UBX_PAYLOAD_RX_NAV_PVT_SIZE_UBX7) /* u-blox 7 msg format */
&& (_rx_payload_length != UBX_PAYLOAD_RX_NAV_PVT_SIZE_UBX8)) /* u-blox 8+ msg format */
_rx_state = UBX_RXMSG_ERROR_LENGTH;
else if (!_configured)
_rx_state = UBX_RXMSG_IGNORE; // ignore if not _configured
else if (!_use_nav_pvt)
_rx_state = UBX_RXMSG_DISABLE; // disable if not using NAV-PVT
break;
case UBX_MSG_NAV_POSLLH:
if (_rx_payload_length != sizeof(ubx_payload_rx_nav_posllh_t))
_rx_state = UBX_RXMSG_ERROR_LENGTH;
else if (!_configured)
_rx_state = UBX_RXMSG_IGNORE; // ignore if not _configured
else if (_use_nav_pvt)
_rx_state = UBX_RXMSG_DISABLE; // disable if using NAV-PVT instead
break;
case UBX_MSG_NAV_SOL:
@ -466,6 +486,8 @@ UBX::payload_rx_init()
_rx_state = UBX_RXMSG_ERROR_LENGTH;
else if (!_configured)
_rx_state = UBX_RXMSG_IGNORE; // ignore if not _configured
else if (_use_nav_pvt)
_rx_state = UBX_RXMSG_DISABLE; // disable if using NAV-PVT instead
break;
case UBX_MSG_NAV_TIMEUTC:
@ -473,6 +495,8 @@ UBX::payload_rx_init()
_rx_state = UBX_RXMSG_ERROR_LENGTH;
else if (!_configured)
_rx_state = UBX_RXMSG_IGNORE; // ignore if not _configured
else if (_use_nav_pvt)
_rx_state = UBX_RXMSG_DISABLE; // disable if using NAV-PVT instead
break;
case UBX_MSG_NAV_SVINFO:
@ -489,6 +513,8 @@ UBX::payload_rx_init()
_rx_state = UBX_RXMSG_ERROR_LENGTH;
else if (!_configured)
_rx_state = UBX_RXMSG_IGNORE; // ignore if not _configured
else if (_use_nav_pvt)
_rx_state = UBX_RXMSG_DISABLE; // disable if using NAV-PVT instead
break;
case UBX_MSG_MON_VER:
@ -675,6 +701,68 @@ UBX::payload_rx_done(void)
// handle message
switch (_rx_msg) {
case UBX_MSG_NAV_PVT:
UBX_TRACE_RXMSG("Rx NAV-PVT\n");
_gps_position->fix_type = _buf.payload_rx_nav_pvt.fixType;
_gps_position->satellites_used = _buf.payload_rx_nav_pvt.numSV;
_gps_position->lat = _buf.payload_rx_nav_pvt.lat;
_gps_position->lon = _buf.payload_rx_nav_pvt.lon;
_gps_position->alt = _buf.payload_rx_nav_pvt.hMSL;
_gps_position->eph = (float)_buf.payload_rx_nav_pvt.hAcc * 1e-3f;
_gps_position->epv = (float)_buf.payload_rx_nav_pvt.vAcc * 1e-3f;
_gps_position->s_variance_m_s = (float)_buf.payload_rx_nav_pvt.sAcc * 1e-3f;
_gps_position->vel_m_s = (float)_buf.payload_rx_nav_pvt.gSpeed * 1e-3f;
_gps_position->vel_n_m_s = (float)_buf.payload_rx_nav_pvt.velN * 1e-3f;
_gps_position->vel_e_m_s = (float)_buf.payload_rx_nav_pvt.velE * 1e-3f;
_gps_position->vel_d_m_s = (float)_buf.payload_rx_nav_pvt.velD * 1e-3f;
_gps_position->vel_ned_valid = true;
_gps_position->cog_rad = (float)_buf.payload_rx_nav_pvt.headMot * M_DEG_TO_RAD_F * 1e-5f;
_gps_position->c_variance_rad = (float)_buf.payload_rx_nav_pvt.headAcc * M_DEG_TO_RAD_F * 1e-5f;
{
/* convert to unix timestamp */
struct tm timeinfo;
timeinfo.tm_year = _buf.payload_rx_nav_pvt.year - 1900;
timeinfo.tm_mon = _buf.payload_rx_nav_pvt.month - 1;
timeinfo.tm_mday = _buf.payload_rx_nav_pvt.day;
timeinfo.tm_hour = _buf.payload_rx_nav_pvt.hour;
timeinfo.tm_min = _buf.payload_rx_nav_pvt.min;
timeinfo.tm_sec = _buf.payload_rx_nav_pvt.sec;
time_t epoch = mktime(&timeinfo);
#ifndef CONFIG_RTC
//Since we lack a hardware RTC, set the system time clock based on GPS UTC
//TODO generalize this by moving into gps.cpp?
timespec ts;
ts.tv_sec = epoch;
ts.tv_nsec = _buf.payload_rx_nav_pvt.nano;
clock_settime(CLOCK_REALTIME, &ts);
#endif
_gps_position->time_gps_usec = (uint64_t)epoch * 1000000; //TODO: test this
_gps_position->time_gps_usec += (uint64_t)(_buf.payload_rx_nav_pvt.nano * 1e-3f);
}
_gps_position->timestamp_time = hrt_absolute_time();
_gps_position->timestamp_velocity = hrt_absolute_time();
_gps_position->timestamp_variance = hrt_absolute_time();
_gps_position->timestamp_position = hrt_absolute_time();
_rate_count_vel++;
_rate_count_lat_lon++;
_got_posllh = true;
_got_velned = true;
ret = 1;
break;
case UBX_MSG_NAV_POSLLH:
UBX_TRACE_RXMSG("Rx NAV-POSLLH\n");
@ -697,7 +785,6 @@ UBX::payload_rx_done(void)
_gps_position->fix_type = _buf.payload_rx_nav_sol.gpsFix;
_gps_position->s_variance_m_s = (float)_buf.payload_rx_nav_sol.sAcc * 1e-2f; // from cm to m
_gps_position->p_variance_m = (float)_buf.payload_rx_nav_sol.pAcc * 1e-2f; // from cm to m
_gps_position->satellites_used = _buf.payload_rx_nav_sol.numSV;
_gps_position->timestamp_variance = hrt_absolute_time();

10
src/drivers/gps/ubx.h
View File

@ -183,7 +183,7 @@ typedef struct {
uint32_t reserved2;
} ubx_payload_rx_nav_sol_t;
/* Rx NAV-PVT */
/* Rx NAV-PVT (ubx8) */
typedef struct {
uint32_t iTOW; /**< GPS Time of Week [ms] */
uint16_t year; /**< Year (UTC)*/
@ -215,9 +215,11 @@ typedef struct {
uint16_t pDOP; /**< Position DOP [0.01] */
uint16_t reserved2;
uint32_t reserved3;
int32_t headVeh; /**< Heading of vehicle (2-D) [1e-5 deg] */
uint32_t reserved4;
int32_t headVeh; /**< (ubx8+ only) Heading of vehicle (2-D) [1e-5 deg] */
uint32_t reserved4; /**< (ubx8+ only) */
} ubx_payload_rx_nav_pvt_t;
#define UBX_PAYLOAD_RX_NAV_PVT_SIZE_UBX7 (sizeof(ubx_payload_rx_nav_pvt_t) - 8)
#define UBX_PAYLOAD_RX_NAV_PVT_SIZE_UBX8 (sizeof(ubx_payload_rx_nav_pvt_t))
/* Rx NAV-TIMEUTC */
typedef struct {
@ -395,6 +397,7 @@ typedef struct {
/* General message and payload buffer union */
typedef union {
ubx_payload_rx_nav_pvt_t payload_rx_nav_pvt;
ubx_payload_rx_nav_posllh_t payload_rx_nav_posllh;
ubx_payload_rx_nav_sol_t payload_rx_nav_sol;
ubx_payload_rx_nav_timeutc_t payload_rx_nav_timeutc;
@ -533,6 +536,7 @@ private:
uint16_t _ack_waiting_msg;
ubx_buf_t _buf;
uint32_t _ubx_version;
bool _use_nav_pvt;
};
#endif /* UBX_H_ */

1
src/modules/mavlink/mavlink_receiver.cpp
View File

@ -741,7 +741,6 @@ MavlinkReceiver::handle_message_hil_gps(mavlink_message_t *msg)
hil_gps.timestamp_variance = timestamp;
hil_gps.s_variance_m_s = 5.0f;
hil_gps.p_variance_m = hil_gps.eph * hil_gps.eph;
hil_gps.timestamp_velocity = timestamp;
hil_gps.vel_m_s = (float)gps.vel * 1e-2f; // from cm/s to m/s

1
src/modules/uORB/topics/vehicle_gps_position.h
View File

@ -61,7 +61,6 @@ struct vehicle_gps_position_s {
uint64_t timestamp_variance;
float s_variance_m_s; /**< speed accuracy estimate m/s */
float p_variance_m; /**< position accuracy estimate m */
float c_variance_rad; /**< course accuracy estimate rad */
uint8_t fix_type; /**< 0-1: no fix, 2: 2D fix, 3: 3D fix. Some applications will not use the value of this field unless it is at least two, so always correctly fill in the fix. */