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zr-v4/libraries/AP_GPS/AP_GPS_UBLOX.cpp

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/*
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 <http://www.gnu.org/licenses/>.
*/
//
// u-blox GPS driver for ArduPilot
// Origin code by Michael Smith, Jordi Munoz and Jose Julio, DIYDrones.com
// Substantially rewritten for new GPS driver structure by Andrew Tridgell
//
#include "AP_GPS.h"
#include "AP_GPS_UBLOX.h"
#include <AP_HAL/Util.h>
#include <DataFlash/DataFlash.h>
#include <GCS_MAVLink/GCS.h>
#if CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_NAVIO || \
CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_BH
#define UBLOX_SPEED_CHANGE 1
#else
#define UBLOX_SPEED_CHANGE 0
#endif
#define UBLOX_DEBUGGING 0
#define UBLOX_FAKE_3DLOCK 0
extern const AP_HAL::HAL& hal;
#if UBLOX_DEBUGGING
# define Debug(fmt, args ...) do {hal.console->printf("%s:%d: " fmt "\n", __FUNCTION__, __LINE__, ## args); hal.scheduler->delay(1); } while(0)
#else
# define Debug(fmt, args ...)
#endif
AP_GPS_UBLOX::AP_GPS_UBLOX(AP_GPS &_gps, AP_GPS::GPS_State &_state, AP_HAL::UARTDriver *_port) :
AP_GPS_Backend(_gps, _state, _port),
_next_message(STEP_PVT),
_ublox_port(255),
_unconfigured_messages(CONFIG_ALL),
_hardware_generation(UBLOX_UNKNOWN_HARDWARE_GENERATION),
next_fix(AP_GPS::NO_FIX),
noReceivedHdop(true)
{
// stop any config strings that are pending
gps.send_blob_start(state.instance, nullptr, 0);
// start the process of updating the GPS rates
_request_next_config();
}
void
AP_GPS_UBLOX::_request_next_config(void)
{
// don't request config if we shouldn't configure the GPS
if (gps._auto_config == AP_GPS::GPS_AUTO_CONFIG_DISABLE) {
return;
}
// Ensure there is enough space for the largest possible outgoing message
if (port->txspace() < (int16_t)(sizeof(struct ubx_header)+sizeof(struct ubx_cfg_nav_rate)+2)) {
// not enough space - do it next time
return;
}
Debug("Unconfigured messages: %d Current message: %d\n", _unconfigured_messages, _next_message);
// check AP_GPS_UBLOX.h for the enum that controls the order.
// This switch statement isn't maintained against the enum in order to reduce code churn
switch (_next_message++) {
case STEP_PVT:
if(!_request_message_rate(CLASS_NAV, MSG_PVT)) {
_next_message--;
}
break;
case STEP_PORT:
_request_port();
break;
case STEP_POLL_SVINFO:
// not required once we know what generation we are on
if(_hardware_generation == UBLOX_UNKNOWN_HARDWARE_GENERATION) {
if (!_send_message(CLASS_NAV, MSG_NAV_SVINFO, 0, 0)) {
_next_message--;
}
}
break;
case STEP_POLL_SBAS:
if (gps._sbas_mode != 2) {
_send_message(CLASS_CFG, MSG_CFG_SBAS, nullptr, 0);
} else {
_unconfigured_messages &= ~CONFIG_SBAS;
}
break;
case STEP_POLL_NAV:
if (!_send_message(CLASS_CFG, MSG_CFG_NAV_SETTINGS, nullptr, 0)) {
_next_message--;
}
break;
case STEP_POLL_GNSS:
if (!_send_message(CLASS_CFG, MSG_CFG_GNSS, nullptr, 0)) {
_next_message--;
}
break;
case STEP_NAV_RATE:
if (!_send_message(CLASS_CFG, MSG_CFG_RATE, nullptr, 0)) {
_next_message--;
}
break;
case STEP_POSLLH:
if(!_request_message_rate(CLASS_NAV, MSG_POSLLH)) {
_next_message--;
}
break;
case STEP_STATUS:
if(!_request_message_rate(CLASS_NAV, MSG_STATUS)) {
_next_message--;
}
break;
case STEP_SOL:
if(!_request_message_rate(CLASS_NAV, MSG_SOL)) {
_next_message--;
}
break;
case STEP_VELNED:
if(!_request_message_rate(CLASS_NAV, MSG_VELNED)) {
_next_message--;
}
break;
case STEP_DOP:
if(! _request_message_rate(CLASS_NAV, MSG_DOP)) {
_next_message--;
}
break;
case STEP_MON_HW:
if(!_request_message_rate(CLASS_MON, MSG_MON_HW)) {
_next_message--;
}
break;
case STEP_MON_HW2:
if(!_request_message_rate(CLASS_MON, MSG_MON_HW2)) {
_next_message--;
}
break;
case STEP_RAW:
#if UBLOX_RXM_RAW_LOGGING
if(gps._raw_data == 0) {
_unconfigured_messages &= ~CONFIG_RATE_RAW;
} else if(!_request_message_rate(CLASS_RXM, MSG_RXM_RAW)) {
_next_message--;
}
#else
_unconfigured_messages & = ~CONFIG_RATE_RAW;
#endif
break;
case STEP_RAWX:
#if UBLOX_RXM_RAW_LOGGING
if(gps._raw_data == 0) {
_unconfigured_messages &= ~CONFIG_RATE_RAW;
} else if(!_request_message_rate(CLASS_RXM, MSG_RXM_RAWX)) {
_next_message--;
}
#else
_unconfigured_messages & = ~CONFIG_RATE_RAW;
#endif
break;
case STEP_VERSION:
if(!_have_version && !hal.util->get_soft_armed()) {
_request_version();
} else {
_unconfigured_messages &= ~CONFIG_VERSION;
}
// no need to send the initial rates, move to checking only
_next_message = STEP_PVT;
break;
default:
// this case should never be reached, do a full reset if it is hit
_next_message = STEP_PVT;
break;
}
}
void
AP_GPS_UBLOX::_verify_rate(uint8_t msg_class, uint8_t msg_id, uint8_t rate) {
uint8_t desired_rate;
switch(msg_class) {
case CLASS_NAV:
switch(msg_id) {
case MSG_POSLLH:
desired_rate = havePvtMsg ? 0 : RATE_POSLLH;
if(rate == desired_rate) {
_unconfigured_messages &= ~CONFIG_RATE_POSLLH;
} else {
_configure_message_rate(msg_class, msg_id, desired_rate);
_unconfigured_messages |= CONFIG_RATE_POSLLH;
_cfg_needs_save = true;
}
break;
case MSG_STATUS:
desired_rate = havePvtMsg ? 0 : RATE_STATUS;
if(rate == desired_rate) {
_unconfigured_messages &= ~CONFIG_RATE_STATUS;
} else {
_configure_message_rate(msg_class, msg_id, desired_rate);
_unconfigured_messages |= CONFIG_RATE_STATUS;
_cfg_needs_save = true;
}
break;
case MSG_SOL:
if(rate == RATE_SOL) {
_unconfigured_messages &= ~CONFIG_RATE_SOL;
} else {
_configure_message_rate(msg_class, msg_id, RATE_SOL);
_unconfigured_messages |= CONFIG_RATE_SOL;
_cfg_needs_save = true;
}
break;
case MSG_PVT:
if(rate == RATE_PVT) {
_unconfigured_messages &= ~CONFIG_RATE_PVT;
} else {
_configure_message_rate(msg_class, msg_id, RATE_PVT);
_unconfigured_messages |= CONFIG_RATE_PVT;
_cfg_needs_save = true;
}
break;
case MSG_VELNED:
desired_rate = havePvtMsg ? 0 : RATE_VELNED;
if(rate == desired_rate) {
_unconfigured_messages &= ~CONFIG_RATE_VELNED;
} else {
_configure_message_rate(msg_class, msg_id, desired_rate);
_unconfigured_messages |= CONFIG_RATE_VELNED;
_cfg_needs_save = true;
}
break;
case MSG_DOP:
if(rate == RATE_DOP) {
_unconfigured_messages &= ~CONFIG_RATE_DOP;
} else {
_configure_message_rate(msg_class, msg_id, RATE_DOP);
_unconfigured_messages |= CONFIG_RATE_DOP;
_cfg_needs_save = true;
}
break;
}
break;
case CLASS_MON:
switch(msg_id) {
case MSG_MON_HW:
if(rate == RATE_HW) {
_unconfigured_messages &= ~CONFIG_RATE_MON_HW;
} else {
_configure_message_rate(msg_class, msg_id, RATE_HW);
_unconfigured_messages |= CONFIG_RATE_MON_HW;
_cfg_needs_save = true;
}
break;
case MSG_MON_HW2:
if(rate == RATE_HW2) {
_unconfigured_messages &= ~CONFIG_RATE_MON_HW2;
} else {
_configure_message_rate(msg_class, msg_id, RATE_HW2);
_unconfigured_messages |= CONFIG_RATE_MON_HW2;
_cfg_needs_save = true;
}
break;
}
break;
#if UBLOX_RXM_RAW_LOGGING
case CLASS_RXM:
switch(msg_id) {
case MSG_RXM_RAW:
if(rate == gps._raw_data) {
_unconfigured_messages &= ~CONFIG_RATE_RAW;
} else {
_configure_message_rate(msg_class, msg_id, gps._raw_data);
_unconfigured_messages |= CONFIG_RATE_RAW;
_cfg_needs_save = true;
}
break;
case MSG_RXM_RAWX:
if(rate == gps._raw_data) {
_unconfigured_messages &= ~CONFIG_RATE_RAW;
} else {
_configure_message_rate(msg_class, msg_id, gps._raw_data);
_unconfigured_messages |= CONFIG_RATE_RAW;
_cfg_needs_save = true;
}
break;
}
break;
#endif // UBLOX_RXM_RAW_LOGGING
}
}
// Requests the ublox driver to identify what port we are using to communicate
void
AP_GPS_UBLOX::_request_port(void)
{
if (port->txspace() < (int16_t)(sizeof(struct ubx_header)+2)) {
// not enough space - do it next time
return;
}
_send_message(CLASS_CFG, MSG_CFG_PRT, nullptr, 0);
}
// Ensure there is enough space for the largest possible outgoing message
// Process bytes available from the stream
//
// The stream is assumed to contain only messages we recognise. If it
// contains other messages, and those messages contain the preamble
// bytes, it is possible for this code to fail to synchronise to the
// stream immediately. Without buffering the entire message and
// re-processing it from the top, this is unavoidable. The parser
// attempts to avoid this when possible.
//
bool
AP_GPS_UBLOX::read(void)
{
uint8_t data;
int16_t numc;
bool parsed = false;
uint32_t millis_now = AP_HAL::millis();
// walk through the gps configuration at 1 message per second
if (millis_now - _last_config_time >= _delay_time) {
_request_next_config();
_last_config_time = millis_now;
if (_unconfigured_messages) { // send the updates faster until fully configured
if (!havePvtMsg && (_unconfigured_messages & CONFIG_REQUIRED_INITIAL)) {
_delay_time = 300;
} else {
_delay_time = 750;
}
} else {
_delay_time = 2000;
}
}
if(!_unconfigured_messages && gps._save_config && !_cfg_saved &&
_num_cfg_save_tries < 5 && (millis_now - _last_cfg_sent_time) > 5000 &&
!hal.util->get_soft_armed()) {
//save the configuration sent until now
if (gps._save_config == 1 ||
(gps._save_config == 2 && _cfg_needs_save)) {
_save_cfg();
}
}
numc = port->available();
for (int16_t i = 0; i < numc; i++) { // Process bytes received
// read the next byte
data = port->read();
reset:
switch(_step) {
// Message preamble detection
//
// If we fail to match any of the expected bytes, we reset
// the state machine and re-consider the failed byte as
// the first byte of the preamble. This improves our
// chances of recovering from a mismatch and makes it less
// likely that we will be fooled by the preamble appearing
// as data in some other message.
//
case 1:
if (PREAMBLE2 == data) {
_step++;
break;
}
_step = 0;
Debug("reset %u", __LINE__);
FALLTHROUGH;
case 0:
if(PREAMBLE1 == data)
_step++;
break;
// Message header processing
//
// We sniff the class and message ID to decide whether we
// are going to gather the message bytes or just discard
// them.
//
// We always collect the length so that we can avoid being
// fooled by preamble bytes in messages.
//
case 2:
_step++;
_class = data;
_ck_b = _ck_a = data; // reset the checksum accumulators
break;
case 3:
_step++;
_ck_b += (_ck_a += data); // checksum byte
_msg_id = data;
break;
case 4:
_step++;
_ck_b += (_ck_a += data); // checksum byte
_payload_length = data; // payload length low byte
break;
case 5:
_step++;
_ck_b += (_ck_a += data); // checksum byte
_payload_length += (uint16_t)(data<<8);
if (_payload_length > sizeof(_buffer)) {
Debug("large payload %u", (unsigned)_payload_length);
// assume any payload bigger then what we know about is noise
_payload_length = 0;
_step = 0;
goto reset;
}
_payload_counter = 0; // prepare to receive payload
break;
// Receive message data
//
case 6:
_ck_b += (_ck_a += data); // checksum byte
if (_payload_counter < sizeof(_buffer)) {
_buffer[_payload_counter] = data;
}
if (++_payload_counter == _payload_length)
_step++;
break;
// Checksum and message processing
//
case 7:
_step++;
if (_ck_a != data) {
Debug("bad cka %x should be %x", data, _ck_a);
_step = 0;
goto reset;
}
break;
case 8:
_step = 0;
if (_ck_b != data) {
Debug("bad ckb %x should be %x", data, _ck_b);
break; // bad checksum
}
if (_parse_gps()) {
parsed = true;
}
break;
}
}
return parsed;
}
// Private Methods /////////////////////////////////////////////////////////////
void AP_GPS_UBLOX::log_mon_hw(void)
{
if (!should_df_log()) {
return;
}
struct log_Ubx1 pkt = {
LOG_PACKET_HEADER_INIT(_ubx_msg_log_index(LOG_GPS_UBX1_MSG)),
time_us : AP_HAL::micros64(),
instance : state.instance,
noisePerMS : _buffer.mon_hw_60.noisePerMS,
jamInd : _buffer.mon_hw_60.jamInd,
aPower : _buffer.mon_hw_60.aPower,
agcCnt : _buffer.mon_hw_60.agcCnt,
config : _unconfigured_messages,
};
if (_payload_length == 68) {
pkt.noisePerMS = _buffer.mon_hw_68.noisePerMS;
pkt.jamInd = _buffer.mon_hw_68.jamInd;
pkt.aPower = _buffer.mon_hw_68.aPower;
pkt.agcCnt = _buffer.mon_hw_68.agcCnt;
}
DataFlash_Class::instance()->WriteBlock(&pkt, sizeof(pkt));
}
void AP_GPS_UBLOX::log_mon_hw2(void)
{
if (!should_df_log()) {
return;
}
struct log_Ubx2 pkt = {
LOG_PACKET_HEADER_INIT(_ubx_msg_log_index(LOG_GPS_UBX2_MSG)),
time_us : AP_HAL::micros64(),
instance : state.instance,
ofsI : _buffer.mon_hw2.ofsI,
magI : _buffer.mon_hw2.magI,
ofsQ : _buffer.mon_hw2.ofsQ,
magQ : _buffer.mon_hw2.magQ,
};
DataFlash_Class::instance()->WriteBlock(&pkt, sizeof(pkt));
}
#if UBLOX_RXM_RAW_LOGGING
void AP_GPS_UBLOX::log_rxm_raw(const struct ubx_rxm_raw &raw)
{
if (!should_df_log()) {
return;
}
uint64_t now = AP_HAL::micros64();
for (uint8_t i=0; i<raw.numSV; i++) {
struct log_GPS_RAW pkt = {
LOG_PACKET_HEADER_INIT(LOG_GPS_RAW_MSG),
time_us : now,
iTOW : raw.iTOW,
week : raw.week,
numSV : raw.numSV,
sv : raw.svinfo[i].sv,
cpMes : raw.svinfo[i].cpMes,
prMes : raw.svinfo[i].prMes,
doMes : raw.svinfo[i].doMes,
mesQI : raw.svinfo[i].mesQI,
cno : raw.svinfo[i].cno,
lli : raw.svinfo[i].lli
};
DataFlash_Class::instance()->WriteBlock(&pkt, sizeof(pkt));
}
}
void AP_GPS_UBLOX::log_rxm_rawx(const struct ubx_rxm_rawx &raw)
{
if (!should_df_log()) {
return;
}
uint64_t now = AP_HAL::micros64();
struct log_GPS_RAWH header = {
LOG_PACKET_HEADER_INIT(LOG_GPS_RAWH_MSG),
time_us : now,
rcvTow : raw.rcvTow,
week : raw.week,
leapS : raw.leapS,
numMeas : raw.numMeas,
recStat : raw.recStat
};
DataFlash_Class::instance()->WriteBlock(&header, sizeof(header));
for (uint8_t i=0; i<raw.numMeas; i++) {
struct log_GPS_RAWS pkt = {
LOG_PACKET_HEADER_INIT(LOG_GPS_RAWS_MSG),
time_us : now,
prMes : raw.svinfo[i].prMes,
cpMes : raw.svinfo[i].cpMes,
doMes : raw.svinfo[i].doMes,
gnssId : raw.svinfo[i].gnssId,
svId : raw.svinfo[i].svId,
freqId : raw.svinfo[i].freqId,
locktime : raw.svinfo[i].locktime,
cno : raw.svinfo[i].cno,
prStdev : raw.svinfo[i].prStdev,
cpStdev : raw.svinfo[i].cpStdev,
doStdev : raw.svinfo[i].doStdev,
trkStat : raw.svinfo[i].trkStat
};
DataFlash_Class::instance()->WriteBlock(&pkt, sizeof(pkt));
}
}
#endif // UBLOX_RXM_RAW_LOGGING
void AP_GPS_UBLOX::unexpected_message(void)
{
Debug("Unexpected message 0x%02x 0x%02x", (unsigned)_class, (unsigned)_msg_id);
if (++_disable_counter == 0) {
// disable future sends of this message id, but
// only do this every 256 messages, as some
// message types can't be disabled and we don't
// want to get into an ack war
Debug("Disabling message 0x%02x 0x%02x", (unsigned)_class, (unsigned)_msg_id);
_configure_message_rate(_class, _msg_id, 0);
}
}
bool
AP_GPS_UBLOX::_parse_gps(void)
{
if (_class == CLASS_ACK) {
Debug("ACK %u", (unsigned)_msg_id);
if(_msg_id == MSG_ACK_ACK) {
switch(_buffer.ack.clsID) {
case CLASS_CFG:
switch(_buffer.ack.msgID) {
case MSG_CFG_CFG:
_cfg_saved = true;
_cfg_needs_save = false;
break;
case MSG_CFG_GNSS:
_unconfigured_messages &= ~CONFIG_GNSS;
break;
case MSG_CFG_MSG:
// There is no way to know what MSG config was ack'ed, assume it was the last
// one requested. To verify it rerequest the last config we sent. If we miss
// the actual ack we will catch it next time through the poll loop, but that
// will be a good chunk of time later.
break;
case MSG_CFG_NAV_SETTINGS:
_unconfigured_messages &= ~CONFIG_NAV_SETTINGS;
break;
case MSG_CFG_RATE:
// The GPS will ACK a update rate that is invalid. in order to detect this
// only accept the rate as configured by reading the settings back and
// validating that they all match the target values
break;
case MSG_CFG_SBAS:
_unconfigured_messages &= ~CONFIG_SBAS;
break;
}
break;
case CLASS_MON:
switch(_buffer.ack.msgID) {
case MSG_MON_HW:
_unconfigured_messages &= ~CONFIG_RATE_MON_HW;
break;
case MSG_MON_HW2:
_unconfigured_messages &= ~CONFIG_RATE_MON_HW2;
break;
}
}
}
return false;
}
if (_class == CLASS_CFG) {
switch(_msg_id) {
case MSG_CFG_NAV_SETTINGS:
Debug("Got settings %u min_elev %d drLimit %u\n",
(unsigned)_buffer.nav_settings.dynModel,
(int)_buffer.nav_settings.minElev,
(unsigned)_buffer.nav_settings.drLimit);
_buffer.nav_settings.mask = 0;
if (gps._navfilter != AP_GPS::GPS_ENGINE_NONE &&
_buffer.nav_settings.dynModel != gps._navfilter) {
// we've received the current nav settings, change the engine
// settings and send them back
Debug("Changing engine setting from %u to %u\n",
(unsigned)_buffer.nav_settings.dynModel, (unsigned)gps._navfilter);
_buffer.nav_settings.dynModel = gps._navfilter;
_buffer.nav_settings.mask |= 1;
}
if (gps._min_elevation != -100 &&
_buffer.nav_settings.minElev != gps._min_elevation) {
Debug("Changing min elevation to %d\n", (int)gps._min_elevation);
_buffer.nav_settings.minElev = gps._min_elevation;
_buffer.nav_settings.mask |= 2;
}
if (_buffer.nav_settings.mask != 0) {
_send_message(CLASS_CFG, MSG_CFG_NAV_SETTINGS,
&_buffer.nav_settings,
sizeof(_buffer.nav_settings));
_unconfigured_messages |= CONFIG_NAV_SETTINGS;
_cfg_needs_save = true;
} else {
_unconfigured_messages &= ~CONFIG_NAV_SETTINGS;
}
return false;
#if UBLOX_GNSS_SETTINGS
case MSG_CFG_GNSS:
if (gps._gnss_mode[state.instance] != 0) {
struct ubx_cfg_gnss start_gnss = _buffer.gnss;
uint8_t gnssCount = 0;
Debug("Got GNSS Settings %u %u %u %u:\n",
(unsigned)_buffer.gnss.msgVer,
(unsigned)_buffer.gnss.numTrkChHw,
(unsigned)_buffer.gnss.numTrkChUse,
(unsigned)_buffer.gnss.numConfigBlocks);
#if UBLOX_DEBUGGING
for(int i = 0; i < _buffer.gnss.numConfigBlocks; i++) {
Debug(" %u %u %u 0x%08x\n",
(unsigned)_buffer.gnss.configBlock[i].gnssId,
(unsigned)_buffer.gnss.configBlock[i].resTrkCh,
(unsigned)_buffer.gnss.configBlock[i].maxTrkCh,
(unsigned)_buffer.gnss.configBlock[i].flags);
}
#endif
for(int i = 0; i < UBLOX_MAX_GNSS_CONFIG_BLOCKS; i++) {
if((gps._gnss_mode[state.instance] & (1 << i)) && i != GNSS_SBAS) {
gnssCount++;
}
}
for(int i = 0; i < _buffer.gnss.numConfigBlocks; i++) {
// Reserve an equal portion of channels for all enabled systems
if(gps._gnss_mode[state.instance] & (1 << _buffer.gnss.configBlock[i].gnssId)) {
if(GNSS_SBAS !=_buffer.gnss.configBlock[i].gnssId) {
_buffer.gnss.configBlock[i].resTrkCh = (_buffer.gnss.numTrkChHw - 3) / (gnssCount * 2);
_buffer.gnss.configBlock[i].maxTrkCh = _buffer.gnss.numTrkChHw;
} else {
_buffer.gnss.configBlock[i].resTrkCh = 1;
_buffer.gnss.configBlock[i].maxTrkCh = 3;
}
_buffer.gnss.configBlock[i].flags = _buffer.gnss.configBlock[i].flags | 0x00000001;
} else {
_buffer.gnss.configBlock[i].resTrkCh = 0;
_buffer.gnss.configBlock[i].maxTrkCh = 0;
_buffer.gnss.configBlock[i].flags = _buffer.gnss.configBlock[i].flags & 0xFFFFFFFE;
}
}
if (memcmp(&start_gnss, &_buffer.gnss, sizeof(start_gnss))) {
_send_message(CLASS_CFG, MSG_CFG_GNSS, &_buffer.gnss, 4 + (8 * _buffer.gnss.numConfigBlocks));
_unconfigured_messages |= CONFIG_GNSS;
_cfg_needs_save = true;
} else {
_unconfigured_messages &= ~CONFIG_GNSS;
}
} else {
_unconfigured_messages &= ~CONFIG_GNSS;
}
return false;
#endif
case MSG_CFG_SBAS:
if (gps._sbas_mode != 2) {
Debug("Got SBAS settings %u %u %u 0x%x 0x%x\n",
(unsigned)_buffer.sbas.mode,
(unsigned)_buffer.sbas.usage,
(unsigned)_buffer.sbas.maxSBAS,
(unsigned)_buffer.sbas.scanmode2,
(unsigned)_buffer.sbas.scanmode1);
if (_buffer.sbas.mode != gps._sbas_mode) {
_buffer.sbas.mode = gps._sbas_mode;
_send_message(CLASS_CFG, MSG_CFG_SBAS,
&_buffer.sbas,
sizeof(_buffer.sbas));
_unconfigured_messages |= CONFIG_SBAS;
_cfg_needs_save = true;
} else {
_unconfigured_messages &= ~CONFIG_SBAS;
}
} else {
_unconfigured_messages &= ~CONFIG_SBAS;
}
return false;
case MSG_CFG_MSG:
if(_payload_length == sizeof(ubx_cfg_msg_rate_6)) {
// can't verify the setting without knowing the port
// request the port again
if(_ublox_port >= UBLOX_MAX_PORTS) {
_request_port();
return false;
}
_verify_rate(_buffer.msg_rate_6.msg_class, _buffer.msg_rate_6.msg_id,
_buffer.msg_rate_6.rates[_ublox_port]);
} else {
_verify_rate(_buffer.msg_rate.msg_class, _buffer.msg_rate.msg_id,
_buffer.msg_rate.rate);
}
return false;
case MSG_CFG_PRT:
_ublox_port = _buffer.prt.portID;
return false;
case MSG_CFG_RATE:
if(_buffer.nav_rate.measure_rate_ms != gps._rate_ms[state.instance] ||
_buffer.nav_rate.nav_rate != 1 ||
_buffer.nav_rate.timeref != 0) {
_configure_rate();
_unconfigured_messages |= CONFIG_RATE_NAV;
_cfg_needs_save = true;
} else {
_unconfigured_messages &= ~CONFIG_RATE_NAV;
}
return false;
}
}
if (_class == CLASS_MON) {
switch(_msg_id) {
case MSG_MON_HW:
if (_payload_length == 60 || _payload_length == 68) {
log_mon_hw();
}
break;
case MSG_MON_HW2:
if (_payload_length == 28) {
log_mon_hw2();
}
break;
case MSG_MON_VER:
_have_version = true;
strncpy(_version.hwVersion, _buffer.mon_ver.hwVersion, sizeof(_version.hwVersion));
strncpy(_version.swVersion, _buffer.mon_ver.swVersion, sizeof(_version.swVersion));
gcs().send_text(MAV_SEVERITY_INFO,
"u-blox %d HW: %s SW: %s",
state.instance + 1,
_version.hwVersion,
_version.swVersion);
break;
default:
unexpected_message();
}
return false;
}
#if UBLOX_RXM_RAW_LOGGING
if (_class == CLASS_RXM && _msg_id == MSG_RXM_RAW && gps._raw_data != 0) {
log_rxm_raw(_buffer.rxm_raw);
return false;
} else if (_class == CLASS_RXM && _msg_id == MSG_RXM_RAWX && gps._raw_data != 0) {
log_rxm_rawx(_buffer.rxm_rawx);
return false;
}
#endif // UBLOX_RXM_RAW_LOGGING
if (_class != CLASS_NAV) {
unexpected_message();
return false;
}
switch (_msg_id) {
case MSG_POSLLH:
Debug("MSG_POSLLH next_fix=%u", next_fix);
if (havePvtMsg) {
_unconfigured_messages |= CONFIG_RATE_POSLLH;
break;
}
_last_pos_time = _buffer.posllh.time;
state.location.lng = _buffer.posllh.longitude;
state.location.lat = _buffer.posllh.latitude;
state.location.alt = _buffer.posllh.altitude_msl / 10;
state.status = next_fix;
_new_position = true;
state.horizontal_accuracy = _buffer.posllh.horizontal_accuracy*1.0e-3f;
state.vertical_accuracy = _buffer.posllh.vertical_accuracy*1.0e-3f;
state.have_horizontal_accuracy = true;
state.have_vertical_accuracy = true;
#if UBLOX_FAKE_3DLOCK
state.location.lng = 1491652300L;
state.location.lat = -353632610L;
state.location.alt = 58400;
state.vertical_accuracy = 0;
state.horizontal_accuracy = 0;
#endif
break;
case MSG_STATUS:
Debug("MSG_STATUS fix_status=%u fix_type=%u",
_buffer.status.fix_status,
_buffer.status.fix_type);
if (havePvtMsg) {
_unconfigured_messages |= CONFIG_RATE_STATUS;
break;
}
if (_buffer.status.fix_status & NAV_STATUS_FIX_VALID) {
if( (_buffer.status.fix_type == AP_GPS_UBLOX::FIX_3D) &&
(_buffer.status.fix_status & AP_GPS_UBLOX::NAV_STATUS_DGPS_USED)) {
next_fix = AP_GPS::GPS_OK_FIX_3D_DGPS;
}else if( _buffer.status.fix_type == AP_GPS_UBLOX::FIX_3D) {
next_fix = AP_GPS::GPS_OK_FIX_3D;
}else if (_buffer.status.fix_type == AP_GPS_UBLOX::FIX_2D) {
next_fix = AP_GPS::GPS_OK_FIX_2D;
}else{
next_fix = AP_GPS::NO_FIX;
state.status = AP_GPS::NO_FIX;
}
}else{
next_fix = AP_GPS::NO_FIX;
state.status = AP_GPS::NO_FIX;
}
#if UBLOX_FAKE_3DLOCK
state.status = AP_GPS::GPS_OK_FIX_3D;
next_fix = state.status;
#endif
break;
case MSG_DOP:
Debug("MSG_DOP");
noReceivedHdop = false;
state.hdop = _buffer.dop.hDOP;
state.vdop = _buffer.dop.vDOP;
#if UBLOX_FAKE_3DLOCK
state.hdop = 130;
state.hdop = 170;
#endif
break;
case MSG_SOL:
Debug("MSG_SOL fix_status=%u fix_type=%u",
_buffer.solution.fix_status,
_buffer.solution.fix_type);
if (havePvtMsg) {
state.time_week = _buffer.solution.week;
break;
}
if (_buffer.solution.fix_status & NAV_STATUS_FIX_VALID) {
if( (_buffer.solution.fix_type == AP_GPS_UBLOX::FIX_3D) &&
(_buffer.solution.fix_status & AP_GPS_UBLOX::NAV_STATUS_DGPS_USED)) {
next_fix = AP_GPS::GPS_OK_FIX_3D_DGPS;
}else if( _buffer.solution.fix_type == AP_GPS_UBLOX::FIX_3D) {
next_fix = AP_GPS::GPS_OK_FIX_3D;
}else if (_buffer.solution.fix_type == AP_GPS_UBLOX::FIX_2D) {
next_fix = AP_GPS::GPS_OK_FIX_2D;
}else{
next_fix = AP_GPS::NO_FIX;
state.status = AP_GPS::NO_FIX;
}
}else{
next_fix = AP_GPS::NO_FIX;
state.status = AP_GPS::NO_FIX;
}
if(noReceivedHdop) {
state.hdop = _buffer.solution.position_DOP;
}
state.num_sats = _buffer.solution.satellites;
if (next_fix >= AP_GPS::GPS_OK_FIX_2D) {
state.last_gps_time_ms = AP_HAL::millis();
state.time_week_ms = _buffer.solution.time;
state.time_week = _buffer.solution.week;
}
#if UBLOX_FAKE_3DLOCK
next_fix = state.status;
state.num_sats = 10;
state.time_week = 1721;
state.time_week_ms = AP_HAL::millis() + 3*60*60*1000 + 37000;
state.last_gps_time_ms = AP_HAL::millis();
state.hdop = 130;
#endif
break;
case MSG_PVT:
Debug("MSG_PVT");
havePvtMsg = true;
// position
_last_pos_time = _buffer.pvt.itow;
state.location.lng = _buffer.pvt.lon;
state.location.lat = _buffer.pvt.lat;
state.location.alt = _buffer.pvt.h_msl / 10;
switch (_buffer.pvt.fix_type)
{
case 0:
state.status = AP_GPS::NO_FIX;
break;
case 1:
state.status = AP_GPS::NO_FIX;
break;
case 2:
state.status = AP_GPS::GPS_OK_FIX_2D;
break;
case 3:
state.status = AP_GPS::GPS_OK_FIX_3D;
if (_buffer.pvt.flags & 0b00000010) // diffsoln
state.status = AP_GPS::GPS_OK_FIX_3D_DGPS;
if (_buffer.pvt.flags & 0b01000000) // carrsoln - float
state.status = AP_GPS::GPS_OK_FIX_3D_RTK_FLOAT;
if (_buffer.pvt.flags & 0b10000000) // carrsoln - fixed
state.status = AP_GPS::GPS_OK_FIX_3D_RTK_FIXED;
break;
case 4:
gcs().send_text(MAV_SEVERITY_INFO,
"Unexpected state %d", _buffer.pvt.flags);
state.status = AP_GPS::GPS_OK_FIX_3D;
break;
case 5:
state.status = AP_GPS::NO_FIX;
break;
default:
state.status = AP_GPS::NO_FIX;
break;
}
next_fix = state.status;
_new_position = true;
state.horizontal_accuracy = _buffer.pvt.h_acc*1.0e-3f;
state.vertical_accuracy = _buffer.pvt.v_acc*1.0e-3f;
state.have_horizontal_accuracy = true;
state.have_vertical_accuracy = true;
// SVs
state.num_sats = _buffer.pvt.num_sv;
// velocity
_last_vel_time = _buffer.pvt.itow;
state.ground_speed = _buffer.pvt.gspeed*0.001f; // m/s
state.ground_course = wrap_360(_buffer.pvt.head_mot * 1.0e-5f); // Heading 2D deg * 100000
state.have_vertical_velocity = true;
state.velocity.x = _buffer.pvt.velN * 0.001f;
state.velocity.y = _buffer.pvt.velE * 0.001f;
state.velocity.z = _buffer.pvt.velD * 0.001f;
state.have_speed_accuracy = true;
state.speed_accuracy = _buffer.pvt.s_acc*0.001f;
_new_speed = true;
// dop
if(noReceivedHdop) {
state.hdop = _buffer.pvt.p_dop;
state.vdop = _buffer.pvt.p_dop;
}
state.last_gps_time_ms = AP_HAL::millis();
// time
state.time_week_ms = _buffer.pvt.itow;
#if UBLOX_FAKE_3DLOCK
state.location.lng = 1491652300L;
state.location.lat = -353632610L;
state.location.alt = 58400;
state.vertical_accuracy = 0;
state.horizontal_accuracy = 0;
state.status = AP_GPS::GPS_OK_FIX_3D;
state.num_sats = 10;
state.time_week = 1721;
state.time_week_ms = AP_HAL::millis() + 3*60*60*1000 + 37000;
state.last_gps_time_ms = AP_HAL::millis();
state.hdop = 130;
state.speed_accuracy = 0;
next_fix = state.status;
#endif
break;
case MSG_VELNED:
Debug("MSG_VELNED");
if (havePvtMsg) {
_unconfigured_messages |= CONFIG_RATE_VELNED;
break;
}
_last_vel_time = _buffer.velned.time;
state.ground_speed = _buffer.velned.speed_2d*0.01f; // m/s
state.ground_course = wrap_360(_buffer.velned.heading_2d * 1.0e-5f); // Heading 2D deg * 100000
state.have_vertical_velocity = true;
state.velocity.x = _buffer.velned.ned_north * 0.01f;
state.velocity.y = _buffer.velned.ned_east * 0.01f;
state.velocity.z = _buffer.velned.ned_down * 0.01f;
state.ground_course = wrap_360(degrees(atan2f(state.velocity.y, state.velocity.x)));
state.ground_speed = norm(state.velocity.y, state.velocity.x);
state.have_speed_accuracy = true;
state.speed_accuracy = _buffer.velned.speed_accuracy*0.01f;
#if UBLOX_FAKE_3DLOCK
state.speed_accuracy = 0;
#endif
_new_speed = true;
break;
case MSG_NAV_SVINFO:
{
Debug("MSG_NAV_SVINFO\n");
static const uint8_t HardwareGenerationMask = 0x07;
_hardware_generation = _buffer.svinfo_header.globalFlags & HardwareGenerationMask;
switch (_hardware_generation) {
case UBLOX_5:
case UBLOX_6:
// only 7 and newer support CONFIG_GNSS
_unconfigured_messages &= ~CONFIG_GNSS;
break;
case UBLOX_7:
case UBLOX_M8:
#if UBLOX_SPEED_CHANGE
port->begin(4000000U);
Debug("Changed speed to 4Mhz for SPI-driven UBlox\n");
#endif
break;
default:
hal.console->printf("Wrong Ublox Hardware Version%u\n", _hardware_generation);
break;
};
_unconfigured_messages &= ~CONFIG_VERSION;
/* We don't need that anymore */
_configure_message_rate(CLASS_NAV, MSG_NAV_SVINFO, 0);
break;
}
default:
Debug("Unexpected NAV message 0x%02x", (unsigned)_msg_id);
if (++_disable_counter == 0) {
Debug("Disabling NAV message 0x%02x", (unsigned)_msg_id);
_configure_message_rate(CLASS_NAV, _msg_id, 0);
}
return false;
}
// we only return true when we get new position and speed data
// this ensures we don't use stale data
if (_new_position && _new_speed && _last_vel_time == _last_pos_time) {
_new_speed = _new_position = false;
return true;
}
return false;
}
// UBlox auto configuration
/*
* update checksum for a set of bytes
*/
void
AP_GPS_UBLOX::_update_checksum(uint8_t *data, uint16_t len, uint8_t &ck_a, uint8_t &ck_b)
{
while (len--) {
ck_a += *data;
ck_b += ck_a;
data++;
}
}
/*
* send a ublox message
*/
bool
AP_GPS_UBLOX::_send_message(uint8_t msg_class, uint8_t msg_id, void *msg, uint16_t size)
{
if (port->txspace() < (sizeof(struct ubx_header) + 2 + size)) {
return false;
}
struct ubx_header header;
uint8_t ck_a=0, ck_b=0;
header.preamble1 = PREAMBLE1;
header.preamble2 = PREAMBLE2;
header.msg_class = msg_class;
header.msg_id = msg_id;
header.length = size;
_update_checksum((uint8_t *)&header.msg_class, sizeof(header)-2, ck_a, ck_b);
_update_checksum((uint8_t *)msg, size, ck_a, ck_b);
port->write((const uint8_t *)&header, sizeof(header));
port->write((const uint8_t *)msg, size);
port->write((const uint8_t *)&ck_a, 1);
port->write((const uint8_t *)&ck_b, 1);
return true;
}
/*
* requests the given message rate for a specific message class
* and msg_id
* returns true if it sent the request, false if waiting on knowing the port
*/
bool
AP_GPS_UBLOX::_request_message_rate(uint8_t msg_class, uint8_t msg_id)
{
// Without knowing what communication port is being used it isn't possible to verify
// always ensure we have a port before sending the request
if(_ublox_port >= UBLOX_MAX_PORTS) {
_request_port();
return false;
} else {
struct ubx_cfg_msg msg;
msg.msg_class = msg_class;
msg.msg_id = msg_id;
return _send_message(CLASS_CFG, MSG_CFG_MSG, &msg, sizeof(msg));
}
}
/*
* configure a UBlox GPS for the given message rate for a specific
* message class and msg_id
*/
bool
AP_GPS_UBLOX::_configure_message_rate(uint8_t msg_class, uint8_t msg_id, uint8_t rate)
{
if (port->txspace() < (int16_t)(sizeof(struct ubx_header)+sizeof(struct ubx_cfg_msg_rate)+2)) {
return false;
}
struct ubx_cfg_msg_rate msg;
msg.msg_class = msg_class;
msg.msg_id = msg_id;
msg.rate = rate;
return _send_message(CLASS_CFG, MSG_CFG_MSG, &msg, sizeof(msg));
}
/*
* save gps configurations to non-volatile memory sent until the call of
* this message
*/
void
AP_GPS_UBLOX::_save_cfg()
{
ubx_cfg_cfg save_cfg;
save_cfg.clearMask = 0;
save_cfg.saveMask = SAVE_CFG_ALL;
save_cfg.loadMask = 0;
_send_message(CLASS_CFG, MSG_CFG_CFG, &save_cfg, sizeof(save_cfg));
_last_cfg_sent_time = AP_HAL::millis();
_num_cfg_save_tries++;
gcs().send_text(MAV_SEVERITY_INFO,
"GPS: u-blox %d saving config",
state.instance + 1);
}
/*
detect a Ublox GPS. Adds one byte, and returns true if the stream
matches a UBlox
*/
bool
AP_GPS_UBLOX::_detect(struct UBLOX_detect_state &state, uint8_t data)
{
reset:
switch (state.step) {
case 1:
if (PREAMBLE2 == data) {
state.step++;
break;
}
state.step = 0;
FALLTHROUGH;
case 0:
if (PREAMBLE1 == data)
state.step++;
break;
case 2:
state.step++;
state.ck_b = state.ck_a = data;
break;
case 3:
state.step++;
state.ck_b += (state.ck_a += data);
break;
case 4:
state.step++;
state.ck_b += (state.ck_a += data);
state.payload_length = data;
break;
case 5:
state.step++;
state.ck_b += (state.ck_a += data);
state.payload_counter = 0;
break;
case 6:
state.ck_b += (state.ck_a += data);
if (++state.payload_counter == state.payload_length)
state.step++;
break;
case 7:
state.step++;
if (state.ck_a != data) {
state.step = 0;
goto reset;
}
break;
case 8:
state.step = 0;
if (state.ck_b == data) {
// a valid UBlox packet
return true;
} else {
goto reset;
}
}
return false;
}
void
AP_GPS_UBLOX::_request_version(void)
{
_send_message(CLASS_MON, MSG_MON_VER, nullptr, 0);
}
void
AP_GPS_UBLOX::_configure_rate(void)
{
struct ubx_cfg_nav_rate msg;
// require a minimum measurement rate of 5Hz
msg.measure_rate_ms = gps.get_rate_ms(state.instance);
msg.nav_rate = 1;
msg.timeref = 0; // UTC time
_send_message(CLASS_CFG, MSG_CFG_RATE, &msg, sizeof(msg));
}
static const char *reasons[] = {"navigation rate",
"posllh rate",
"status rate",
"solution rate",
"velned rate",
"dop rate",
"hw monitor rate",
"hw2 monitor rate",
"raw rate",
"version",
"navigation settings",
"GNSS settings",
"SBAS settings",
"PVT rate"};
void
AP_GPS_UBLOX::broadcast_configuration_failure_reason(void) const {
for (uint8_t i = 0; i < ARRAY_SIZE(reasons); i++) {
if (_unconfigured_messages & (1 << i)) {
gcs().send_text(MAV_SEVERITY_INFO, "GPS %d: u-blox %s configuration 0x%02x",
state.instance +1, reasons[i], _unconfigured_messages);
break;
}
}
}
/*
return velocity lag in seconds
*/
bool AP_GPS_UBLOX::get_lag(float &lag_sec) const
{
switch (_hardware_generation) {
case UBLOX_UNKNOWN_HARDWARE_GENERATION:
lag_sec = 0.22f;
// always bail out in this case, it's used to indicate we have yet to receive a valid
// hardware generation, however the user may have inhibited us detecting the generation
// so if we aren't allowed to do configuration, we will accept this as the default delay
return gps._auto_config != AP_GPS::GPS_AUTO_CONFIG_ENABLE;
case UBLOX_5:
case UBLOX_6:
default:
lag_sec = 0.22f;
break;
case UBLOX_7:
case UBLOX_M8:
// based on flight logs the 7 and 8 series seem to produce about 120ms lag
lag_sec = 0.12f;
break;
};
return true;
}
void AP_GPS_UBLOX::Write_DataFlash_Log_Startup_messages() const
{
AP_GPS_Backend::Write_DataFlash_Log_Startup_messages();
if (_have_version) {
DataFlash_Class::instance()->Log_Write_MessageF("u-blox %d HW: %s SW: %s",
state.instance+1,
_version.hwVersion,
_version.swVersion);
}
}