AP_ExternalAHRS: Implement EAHRS Driver for Lord Microstrain AHRS
This commit is contained in:
Davis Schenkenberger
Peter Barker
parent
3e748d77c9
commit
2026f7efb8
@ -18,6 +18,7 @@
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#include "AP_ExternalAHRS.h"
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#include "AP_ExternalAHRS_VectorNav.h"
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#include "AP_ExternalAHRS_LORD.h"
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#if HAL_EXTERNAL_AHRS_ENABLED
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@ -49,7 +50,7 @@ const AP_Param::GroupInfo AP_ExternalAHRS::var_info[] = {
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// @Param: _TYPE
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// @DisplayName: AHRS type
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// @Description: Type of AHRS device
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// @Values: 0:None,1:VectorNav
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// @Values: 0:None,1:VectorNav,2:LORD
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// @User: Standard
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AP_GROUPINFO_FLAGS("_TYPE", 1, AP_ExternalAHRS, devtype, HAL_EXTERNAL_AHRS_DEFAULT, AP_PARAM_FLAG_ENABLE),
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@ -78,6 +79,9 @@ void AP_ExternalAHRS::init(void)
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case DevType::VecNav:
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backend = new AP_ExternalAHRS_VectorNav(this, state);
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break;
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case DevType::LORD:
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backend = new AP_ExternalAHRS_LORD(this, state);
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break;
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default:
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GCS_SEND_TEXT(MAV_SEVERITY_INFO, "Unsupported ExternalAHRS type %u", unsigned(devtype));
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break;
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@ -47,6 +47,7 @@ public:
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enum class DevType : uint8_t {
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None = 0,
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VecNav = 1,
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LORD = 2,
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};
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static AP_ExternalAHRS *get_singleton(void) {
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577
libraries/AP_ExternalAHRS/AP_ExternalAHRS_LORD.cpp
Normal file
577
libraries/AP_ExternalAHRS/AP_ExternalAHRS_LORD.cpp
Normal file
@ -0,0 +1,577 @@
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/*
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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suppport for LORD Microstrain CX5/GX5-45 serially connected AHRS Systems
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*/
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#define ALLOW_DOUBLE_MATH_FUNCTIONS
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#include "AP_ExternalAHRS_LORD.h"
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#if HAL_EXTERNAL_AHRS_LORD_ENABLED
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#include <AP_Baro/AP_Baro.h>
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#include <AP_Compass/AP_Compass.h>
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#include <AP_GPS/AP_GPS.h>
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#include <AP_InertialSensor/AP_InertialSensor.h>
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#include <GCS_MAVLink/GCS.h>
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#include <AP_Logger/AP_Logger.h>
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#include <AP_HAL/utility/sparse-endian.h>
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#include <AP_BoardConfig/AP_BoardConfig.h>
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enum class DescriptorSet {
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BaseCommand = 0x01,
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DMCommand = 0x0C,
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SystemCommand = 0x7F,
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IMUData = 0x80,
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GNSSData = 0x81,
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EstimationData = 0x82
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};
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enum class INSPacketField {
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ACCEL = 0x04,
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GYRO = 0x05,
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QUAT = 0x0A,
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MAG = 0x06,
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PRESSURE = 0x17
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};
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enum class GNSSPacketField {
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LLH_POSITION = 0x03,
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NED_VELOCITY = 0x05,
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DOP_DATA = 0x07,
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GPS_TIME = 0x09,
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FIX_INFO = 0x0B
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};
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enum class GNSSFixType {
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FIX_3D = 0x00,
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FIX_2D = 0x01,
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TIME_ONLY = 0x02,
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NONE = 0x03,
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INVALID = 0x04
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};
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enum class FilterPacketField {
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FILTER_STATUS = 0x10,
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GPS_TIME = 0x11,
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LLH_POSITION = 0x01,
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NED_VELOCITY = 0x02
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};
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extern const AP_HAL::HAL &hal;
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AP_ExternalAHRS_LORD::AP_ExternalAHRS_LORD(AP_ExternalAHRS *_frontend,
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AP_ExternalAHRS::state_t &_state): AP_ExternalAHRS_backend(_frontend, _state)
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{
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auto &sm = AP::serialmanager();
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uart = sm.find_serial(AP_SerialManager::SerialProtocol_AHRS, 0);
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baudrate = sm.find_baudrate(AP_SerialManager::SerialProtocol_AHRS, 0);
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port_num = sm.find_portnum(AP_SerialManager::SerialProtocol_AHRS, 0);
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if (!uart) {
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GCS_SEND_TEXT(MAV_SEVERITY_INFO, "ExternalAHRS no UART");
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return;
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}
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if (!hal.scheduler->thread_create(FUNCTOR_BIND_MEMBER(&AP_ExternalAHRS_LORD::update_thread, void), "AHRS", 2048, AP_HAL::Scheduler::PRIORITY_SPI, 0)) {
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AP_BoardConfig::allocation_error("Failed to allocate ExternalAHRS update thread");
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}
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hal.scheduler->delay(5000);
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GCS_SEND_TEXT(MAV_SEVERITY_INFO, "LORD ExternalAHRS initialised");
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}
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void AP_ExternalAHRS_LORD::update_thread(void)
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{
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if (!port_open) {
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port_open = true;
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uart->begin(baudrate);
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}
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while (true) {
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build_packet();
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hal.scheduler->delay_microseconds(100);
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}
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}
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// Builds packets by looking at each individual byte, once a full packet has been read in it checks the checksum then handles the packet.
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void AP_ExternalAHRS_LORD::build_packet()
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{
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WITH_SEMAPHORE(sem);
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uint32_t nbytes = MIN(uart->available(), 2048u);
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while (nbytes--> 0) {
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const int16_t b = uart->read();
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if (b < 0) {
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break;
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}
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switch (message_in.state) {
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case ParseState::WaitingFor_SyncOne:
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if (b == SYNC_ONE) {
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message_in.packet.header[0] = b;
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message_in.state = ParseState::WaitingFor_SyncTwo;
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}
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break;
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case ParseState::WaitingFor_SyncTwo:
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if (b == SYNC_TWO) {
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message_in.packet.header[1] = b;
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message_in.state = ParseState::WaitingFor_Descriptor;
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} else {
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message_in.state = ParseState::WaitingFor_SyncOne;
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}
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break;
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case ParseState::WaitingFor_Descriptor:
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message_in.packet.header[2] = b;
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message_in.state = ParseState::WaitingFor_PayloadLength;
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break;
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case ParseState::WaitingFor_PayloadLength:
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message_in.packet.header[3] = b;
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message_in.state = ParseState::WaitingFor_Data;
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message_in.index = 0;
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break;
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case ParseState::WaitingFor_Data:
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message_in.packet.payload[message_in.index++] = b;
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if (message_in.index >= message_in.packet.header[3]) {
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message_in.state = ParseState::WaitingFor_Checksum;
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message_in.index = 0;
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}
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break;
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case ParseState::WaitingFor_Checksum:
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message_in.packet.checksum[message_in.index++] = b;
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if (message_in.index >= 2) {
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message_in.state = ParseState::WaitingFor_SyncOne;
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message_in.index = 0;
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if (valid_packet(message_in.packet)) {
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handle_packet(message_in.packet);
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}
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}
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break;
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}
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}
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}
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// returns true if the fletcher checksum for the packet is valid, else false.
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bool AP_ExternalAHRS_LORD::valid_packet(const LORD_Packet & packet) const
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{
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uint8_t checksum_one = 0;
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uint8_t checksum_two = 0;
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for (int i = 0; i < 4; i++) {
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checksum_one += packet.header[i];
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checksum_two += checksum_one;
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}
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for (int i = 0; i < packet.header[3]; i++) {
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checksum_one += packet.payload[i];
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checksum_two += checksum_one;
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}
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return packet.checksum[0] == checksum_one && packet.checksum[1] == checksum_two;
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}
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// Calls the correct functions based on the packet descriptor of the packet
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void AP_ExternalAHRS_LORD::handle_packet(const LORD_Packet& packet)
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{
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switch ((DescriptorSet) packet.header[2]) {
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case DescriptorSet::IMUData:
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handle_imu(packet);
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post_imu();
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break;
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case DescriptorSet::GNSSData:
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handle_gnss(packet);
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break;
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case DescriptorSet::EstimationData:
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handle_filter(packet);
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post_filter();
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break;
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case DescriptorSet::BaseCommand:
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case DescriptorSet::DMCommand:
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case DescriptorSet::SystemCommand:
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break;
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}
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}
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// Collects data from an imu packet into `imu_data`
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void AP_ExternalAHRS_LORD::handle_imu(const LORD_Packet& packet)
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{
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last_ins_pkt = AP_HAL::millis();
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// Iterate through fields of varying lengths in INS packet
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for (uint8_t i = 0; i < packet.header[3]; i += packet.payload[i]) {
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switch ((INSPacketField) packet.payload[i+1]) {
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// Scaled Ambient Pressure
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case INSPacketField::PRESSURE: {
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imu_data.pressure = extract_float(packet.payload, i+2) * 100; // Convert millibar to pascals
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break;
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}
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// Scaled Magnetometer Vector
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case INSPacketField::MAG: {
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imu_data.mag = populate_vector3f(packet.payload, i+2) * 1000; // Convert gauss to milligauss
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break;
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}
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// Scaled Accelerometer Vector
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case INSPacketField::ACCEL: {
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imu_data.accel = populate_vector3f(packet.payload, i+2) * GRAVITY_MSS; // Convert g's to m/s^2
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break;
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}
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// Scaled Gyro Vector
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case INSPacketField::GYRO: {
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imu_data.gyro = populate_vector3f(packet.payload, i+2);
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break;
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}
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// Quaternion
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case INSPacketField::QUAT: {
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imu_data.quat = populate_quaternion(packet.payload, i+2);
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break;
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}
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}
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}
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}
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// Posts data from an imu packet to `state` and `handle_external` methods
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void AP_ExternalAHRS_LORD::post_imu() const
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{
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{
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WITH_SEMAPHORE(state.sem);
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state.accel = imu_data.accel;
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state.gyro = imu_data.gyro;
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state.quat = imu_data.quat;
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state.have_quaternion = true;
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}
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{
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AP_ExternalAHRS::ins_data_message_t ins {
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accel: imu_data.accel,
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gyro: imu_data.gyro,
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temperature: -300
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};
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AP::ins().handle_external(ins);
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}
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{
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AP_ExternalAHRS::mag_data_message_t mag {
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field: imu_data.mag
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};
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AP::compass().handle_external(mag);
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}
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{
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const AP_ExternalAHRS::baro_data_message_t baro {
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instance: 0,
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pressure_pa: imu_data.pressure,
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// setting temp to 25 effectively disables barometer temperature calibrations - these are already performed by lord
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temperature: 25,
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};
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AP::baro().handle_external(baro);
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}
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}
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// Collects data from a gnss packet into `gnss_data`
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void AP_ExternalAHRS_LORD::handle_gnss(const LORD_Packet &packet)
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{
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last_gps_pkt = AP_HAL::millis();
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// Iterate through fields of varying lengths in GNSS packet
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for (uint8_t i = 0; i < packet.header[3]; i += packet.payload[i]) {
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switch ((GNSSPacketField) packet.payload[i+1]) {
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// GPS Time
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case GNSSPacketField::GPS_TIME: {
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gnss_data.tow_ms = extract_double(packet.payload, i+2) * 1000; // Convert seconds to ms
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gnss_data.week = be16toh_ptr(&packet.payload[i+10]);
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break;
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}
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// GNSS Fix Information
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case GNSSPacketField::FIX_INFO: {
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switch ((GNSSFixType) packet.payload[i+2]) {
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case (GNSSFixType::FIX_3D): {
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gnss_data.fix_type = GPS_FIX_TYPE_3D_FIX;
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break;
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}
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case (GNSSFixType::FIX_2D): {
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gnss_data.fix_type = GPS_FIX_TYPE_2D_FIX;
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break;
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}
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case (GNSSFixType::TIME_ONLY):
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case (GNSSFixType::NONE): {
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gnss_data.fix_type = GPS_FIX_TYPE_NO_FIX;
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break;
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}
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default:
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case (GNSSFixType::INVALID): {
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gnss_data.fix_type = GPS_FIX_TYPE_NO_GPS;
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break;
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}
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}
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gnss_data.satellites = packet.payload[i+3];
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break;
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}
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// LLH Position
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case GNSSPacketField::LLH_POSITION: {
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gnss_data.lat = extract_double(packet.payload, i+2) * 1.0e7; // Decimal degrees to degrees
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gnss_data.lon = extract_double(packet.payload, i+10) * 1.0e7;
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gnss_data.msl_altitude = extract_double(packet.payload, i+26) * 1.0e2; // Meters to cm
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gnss_data.horizontal_position_accuracy = extract_float(packet.payload, i+34);
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gnss_data.vertical_position_accuracy = extract_float(packet.payload, i+38);
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break;
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}
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// DOP Data
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case GNSSPacketField::DOP_DATA: {
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gnss_data.hdop = extract_float(packet.payload, i+10);
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gnss_data.vdop = extract_float(packet.payload, i+14);
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break;
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}
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// NED Velocity
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case GNSSPacketField::NED_VELOCITY: {
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gnss_data.ned_velocity_north = extract_float(packet.payload, i+2);
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gnss_data.ned_velocity_east = extract_float(packet.payload, i+6);
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gnss_data.ned_velocity_down = extract_float(packet.payload, i+10);
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gnss_data.speed_accuracy = extract_float(packet.payload, i+26);
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break;
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}
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}
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}
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}
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void AP_ExternalAHRS_LORD::handle_filter(const LORD_Packet &packet)
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{
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last_filter_pkt = AP_HAL::millis();
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// Iterate through fields of varying lengths in filter packet
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for (uint8_t i = 0; i < packet.header[3]; i += packet.payload[i]) {
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switch ((FilterPacketField) packet.payload[i+1]) {
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// GPS Timestamp
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case FilterPacketField::GPS_TIME: {
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filter_data.tow_ms = extract_double(packet.payload, i+2) * 1000; // Convert seconds to ms
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filter_data.week = be16toh_ptr(&packet.payload[i+10]);
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break;
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}
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// LLH Position
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case FilterPacketField::LLH_POSITION: {
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filter_data.lat = extract_double(packet.payload, i+2) * 1.0e7; // Decimal degrees to degrees
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filter_data.lon = extract_double(packet.payload, i+10) * 1.0e7;
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filter_data.hae_altitude = extract_double(packet.payload, i+26) * 1.0e2; // Meters to cm
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break;
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}
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// NED Velocity
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case FilterPacketField::NED_VELOCITY: {
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filter_data.ned_velocity_north = extract_float(packet.payload, i+2);
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filter_data.ned_velocity_east = extract_float(packet.payload, i+6);
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filter_data.ned_velocity_down = extract_float(packet.payload, i+10);
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break;
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}
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// Filter Status
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case FilterPacketField::FILTER_STATUS: {
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filter_status.state = be16toh_ptr(&packet.payload[i+2]);
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filter_status.mode = be16toh_ptr(&packet.payload[i+4]);
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filter_status.flags = be16toh_ptr(&packet.payload[i+6]);
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break;
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}
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}
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}
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}
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void AP_ExternalAHRS_LORD::post_filter() const
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{
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{
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WITH_SEMAPHORE(state.sem);
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state.velocity = Vector3f{filter_data.ned_velocity_north, filter_data.ned_velocity_east, filter_data.ned_velocity_down};
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state.have_velocity = true;
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state.location = Location{filter_data.lat, filter_data.lon, gnss_data.msl_altitude, Location::AltFrame::ABSOLUTE};
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state.have_location = true;
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}
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AP_ExternalAHRS::gps_data_message_t gps {
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gps_week: filter_data.week,
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ms_tow: filter_data.tow_ms,
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fix_type: (uint8_t) gnss_data.fix_type,
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satellites_in_view: gnss_data.satellites,
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horizontal_pos_accuracy: gnss_data.horizontal_position_accuracy,
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vertical_pos_accuracy: gnss_data.vertical_position_accuracy,
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horizontal_vel_accuracy: gnss_data.speed_accuracy,
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hdop: gnss_data.hdop,
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vdop: gnss_data.vdop,
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longitude: filter_data.lon,
|
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latitude: filter_data.lat,
|
||||
msl_altitude: gnss_data.msl_altitude,
|
||||
|
||||
ned_vel_north: filter_data.ned_velocity_north,
|
||||
ned_vel_east: filter_data.ned_velocity_east,
|
||||
ned_vel_down: filter_data.ned_velocity_down,
|
||||
};
|
||||
|
||||
if (gps.fix_type >= 3 && !state.have_origin) {
|
||||
WITH_SEMAPHORE(state.sem);
|
||||
state.origin = Location{int32_t(filter_data.lat),
|
||||
int32_t(filter_data.lon),
|
||||
int32_t(gnss_data.msl_altitude),
|
||||
Location::AltFrame::ABSOLUTE};
|
||||
state.have_origin = true;
|
||||
}
|
||||
|
||||
AP::gps().handle_external(gps);
|
||||
}
|
||||
|
||||
int8_t AP_ExternalAHRS_LORD::get_port(void) const
|
||||
{
|
||||
if (!uart) {
|
||||
return -1;
|
||||
}
|
||||
return port_num;
|
||||
};
|
||||
|
||||
bool AP_ExternalAHRS_LORD::healthy(void) const
|
||||
{
|
||||
uint32_t now = AP_HAL::millis();
|
||||
return (now - last_ins_pkt < 40 && now - last_gps_pkt < 500 && now - last_filter_pkt < 500);
|
||||
}
|
||||
|
||||
bool AP_ExternalAHRS_LORD::initialised(void) const
|
||||
{
|
||||
return last_ins_pkt != 0 && last_gps_pkt != 0 && last_filter_pkt != 0;
|
||||
}
|
||||
|
||||
bool AP_ExternalAHRS_LORD::pre_arm_check(char *failure_msg, uint8_t failure_msg_len) const
|
||||
{
|
||||
if (!healthy()) {
|
||||
hal.util->snprintf(failure_msg, failure_msg_len, "LORD unhealthy");
|
||||
return false;
|
||||
}
|
||||
if (gnss_data.fix_type < 3) {
|
||||
hal.util->snprintf(failure_msg, failure_msg_len, "LORD no GPS lock");
|
||||
return false;
|
||||
}
|
||||
if (filter_status.state != 0x02) {
|
||||
hal.util->snprintf(failure_msg, failure_msg_len, "LORD filter not running");
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
void AP_ExternalAHRS_LORD::get_filter_status(nav_filter_status &status) const
|
||||
{
|
||||
memset(&status, 0, sizeof(status));
|
||||
if (last_ins_pkt != 0 && last_gps_pkt != 0) {
|
||||
status.flags.initalized = 1;
|
||||
}
|
||||
if (healthy() && last_ins_pkt != 0) {
|
||||
status.flags.attitude = 1;
|
||||
status.flags.vert_vel = 1;
|
||||
status.flags.vert_pos = 1;
|
||||
|
||||
if (gnss_data.fix_type >= 3) {
|
||||
status.flags.horiz_vel = 1;
|
||||
status.flags.horiz_pos_rel = 1;
|
||||
status.flags.horiz_pos_abs = 1;
|
||||
status.flags.pred_horiz_pos_rel = 1;
|
||||
status.flags.pred_horiz_pos_abs = 1;
|
||||
status.flags.using_gps = 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void AP_ExternalAHRS_LORD::send_status_report(mavlink_channel_t chan) const
|
||||
{
|
||||
// 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 float vel_gate = 4; // represents hz value data is posted at
|
||||
const float pos_gate = 4; // represents hz value data is posted at
|
||||
const float hgt_gate = 4; // represents hz value data is posted at
|
||||
const float mag_var = 0; //we may need to change this to be like the other gates, set to 0 because mag is ignored by the ins filter in vectornav
|
||||
mavlink_msg_ekf_status_report_send(chan, flags,
|
||||
gnss_data.speed_accuracy/vel_gate, gnss_data.horizontal_position_accuracy/pos_gate, gnss_data.vertical_position_accuracy/hgt_gate,
|
||||
mag_var, 0, 0);
|
||||
|
||||
}
|
||||
|
||||
Vector3f AP_ExternalAHRS_LORD::populate_vector3f(const uint8_t *data, uint8_t offset) const
|
||||
{
|
||||
return Vector3f {
|
||||
extract_float(data, offset),
|
||||
extract_float(data, offset+4),
|
||||
extract_float(data, offset+8)
|
||||
};
|
||||
}
|
||||
|
||||
Quaternion AP_ExternalAHRS_LORD::populate_quaternion(const uint8_t *data, uint8_t offset) const
|
||||
{
|
||||
return Quaternion {
|
||||
extract_float(data, offset),
|
||||
extract_float(data, offset+4),
|
||||
extract_float(data, offset+8),
|
||||
extract_float(data, offset+12)
|
||||
};
|
||||
}
|
||||
|
||||
float AP_ExternalAHRS_LORD::extract_float(const uint8_t *data, uint8_t offset) const
|
||||
{
|
||||
uint32_t tmp = be32toh_ptr(&data[offset]);
|
||||
|
||||
return *reinterpret_cast<float*>(&tmp);
|
||||
}
|
||||
|
||||
double AP_ExternalAHRS_LORD::extract_double(const uint8_t *data, uint8_t offset) const
|
||||
{
|
||||
uint64_t tmp = be64toh_ptr(&data[offset]);
|
||||
|
||||
return *reinterpret_cast<double*>(&tmp);
|
||||
}
|
||||
|
||||
#endif // HAL_EXTERNAL_AHRS_ENABLED
|
||||
|
||||
154
libraries/AP_ExternalAHRS/AP_ExternalAHRS_LORD.h
Normal file
154
libraries/AP_ExternalAHRS/AP_ExternalAHRS_LORD.h
Normal file
@ -0,0 +1,154 @@
|
||||
/*
|
||||
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/>.
|
||||
*/
|
||||
/*
|
||||
suppport for serial connected AHRS systems
|
||||
*/
|
||||
|
||||
#pragma once
|
||||
|
||||
#include "AP_ExternalAHRS_backend.h"
|
||||
|
||||
#ifndef HAL_EXTERNAL_AHRS_LORD_ENABLED
|
||||
#define HAL_EXTERNAL_AHRS_LORD_ENABLED HAL_EXTERNAL_AHRS_ENABLED
|
||||
#endif
|
||||
|
||||
#if HAL_EXTERNAL_AHRS_LORD_ENABLED
|
||||
|
||||
#include <GCS_MAVLink/GCS_MAVLink.h>
|
||||
|
||||
class AP_ExternalAHRS_LORD: public AP_ExternalAHRS_backend
|
||||
{
|
||||
public:
|
||||
|
||||
AP_ExternalAHRS_LORD(AP_ExternalAHRS *frontend, AP_ExternalAHRS::state_t &state);
|
||||
|
||||
// get serial port number, -1 for not enabled
|
||||
int8_t get_port(void) const override;
|
||||
|
||||
// accessors for AP_AHRS
|
||||
bool healthy(void) const override;
|
||||
bool initialised(void) const override;
|
||||
bool pre_arm_check(char *failure_msg, uint8_t failure_msg_len) const override;
|
||||
void get_filter_status(nav_filter_status &status) const override;
|
||||
void send_status_report(mavlink_channel_t chan) const override;
|
||||
|
||||
// check for new data
|
||||
void update() override {
|
||||
build_packet();
|
||||
};
|
||||
|
||||
private:
|
||||
|
||||
enum class ParseState {
|
||||
WaitingFor_SyncOne,
|
||||
WaitingFor_SyncTwo,
|
||||
WaitingFor_Descriptor,
|
||||
WaitingFor_PayloadLength,
|
||||
WaitingFor_Data,
|
||||
WaitingFor_Checksum
|
||||
};
|
||||
|
||||
void update_thread();
|
||||
|
||||
AP_HAL::UARTDriver *uart;
|
||||
HAL_Semaphore sem;
|
||||
|
||||
uint32_t baudrate;
|
||||
int8_t port_num;
|
||||
bool port_open = false;
|
||||
|
||||
const uint8_t SYNC_ONE = 0x75;
|
||||
const uint8_t SYNC_TWO = 0x65;
|
||||
|
||||
uint32_t last_ins_pkt;
|
||||
uint32_t last_gps_pkt;
|
||||
uint32_t last_filter_pkt;
|
||||
|
||||
// A LORD packet can be a maximum of 261 bytes
|
||||
struct LORD_Packet {
|
||||
uint8_t header[4];
|
||||
uint8_t payload[255];
|
||||
uint8_t checksum[2];
|
||||
};
|
||||
|
||||
struct {
|
||||
LORD_Packet packet;
|
||||
ParseState state;
|
||||
uint8_t index;
|
||||
} message_in;
|
||||
|
||||
struct {
|
||||
Vector3f accel;
|
||||
Vector3f gyro;
|
||||
Vector3f mag;
|
||||
Quaternion quat;
|
||||
float pressure;
|
||||
} imu_data;
|
||||
|
||||
struct {
|
||||
uint16_t week;
|
||||
uint32_t tow_ms;
|
||||
GPS_FIX_TYPE fix_type;
|
||||
uint8_t satellites;
|
||||
float horizontal_position_accuracy;
|
||||
float vertical_position_accuracy;
|
||||
float hdop;
|
||||
float vdop;
|
||||
int32_t lon;
|
||||
int32_t lat;
|
||||
int32_t msl_altitude;
|
||||
float ned_velocity_north;
|
||||
float ned_velocity_east;
|
||||
float ned_velocity_down;
|
||||
float speed_accuracy;
|
||||
} gnss_data;
|
||||
|
||||
struct {
|
||||
uint16_t state;
|
||||
uint16_t mode;
|
||||
uint16_t flags;
|
||||
} filter_status;
|
||||
|
||||
struct {
|
||||
uint16_t week;
|
||||
uint32_t tow_ms;
|
||||
float horizontal_position_accuracy;
|
||||
float vertical_position_accuracy;
|
||||
int32_t lon;
|
||||
int32_t lat;
|
||||
int32_t hae_altitude;
|
||||
float ned_velocity_north;
|
||||
float ned_velocity_east;
|
||||
float ned_velocity_down;
|
||||
float speed_accuracy;
|
||||
} filter_data;
|
||||
|
||||
void build_packet();
|
||||
bool valid_packet(const LORD_Packet &packet) const;
|
||||
void handle_packet(const LORD_Packet &packet);
|
||||
void handle_imu(const LORD_Packet &packet);
|
||||
void handle_gnss(const LORD_Packet &packet);
|
||||
void handle_filter(const LORD_Packet &packet);
|
||||
void post_imu() const;
|
||||
void post_gnss() const;
|
||||
void post_filter() const;
|
||||
|
||||
Vector3f populate_vector3f(const uint8_t* data, uint8_t offset) const;
|
||||
Quaternion populate_quaternion(const uint8_t* data, uint8_t offset) const;
|
||||
float extract_float(const uint8_t* data, uint8_t offset) const;
|
||||
double extract_double(const uint8_t* data, uint8_t offset) const;
|
||||
|
||||
};
|
||||
|
||||
#endif // HAL_EXTERNAL_AHRS_ENABLED
|
||||
|
||||
Loading…
Reference in New Issue
Block a user