ardupilot/libraries/SITL/SIM_GPS.h

133 lines
3.3 KiB
C++

/*
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/>.
*/
/*
simulate GPS sensors
Usage example:
param set SERIAL5_PROTOCOL 5
sim_vehicle.py -D --console --map -A --uartB=sim:gps:2
*/
#pragma once
#include <AP_HAL/AP_HAL_Boards.h>
#ifndef HAL_SIM_GPS_ENABLED
#define HAL_SIM_GPS_ENABLED (AP_SIM_ENABLED && !defined(HAL_BUILD_AP_PERIPH))
#endif
#if HAL_SIM_GPS_ENABLED
#ifndef HAL_SIM_GPS_EXTERNAL_FIFO_ENABLED
#define HAL_SIM_GPS_EXTERNAL_FIFO_ENABLED (CONFIG_HAL_BOARD == HAL_BOARD_SITL)
#endif
#ifndef AP_SIM_GPS_FILE_ENABLED
// really need to use AP_FileSystem for this.
#define AP_SIM_GPS_FILE_ENABLED (CONFIG_HAL_BOARD == HAL_BOARD_SITL || CONFIG_HAL_BOARD == HAL_BOARD_LINUX)
#endif
#include "SIM_SerialDevice.h"
namespace SITL {
class GPS : public SerialDevice {
public:
CLASS_NO_COPY(GPS);
enum Type {
NONE = 0,
UBLOX = 1,
NMEA = 5,
SBP = 6,
#if AP_SIM_GPS_FILE_ENABLED
FILE = 7,
#endif
NOVA = 8,
SBP2 = 9,
};
GPS(uint8_t _instance);
// update state
void update();
ssize_t write_to_autopilot(const char *p, size_t size) const override;
private:
uint8_t instance;
int ext_fifo_fd;
uint32_t last_update; // milliseconds
// for delay simulation:
struct gps_data {
uint32_t timestamp_ms;
double latitude;
double longitude;
float altitude;
double speedN;
double speedE;
double speedD;
double yaw_deg;
double roll_deg;
double pitch_deg;
bool have_lock;
};
// last 20 samples, allowing for up to 20 samples of delay
gps_data _gps_history[20];
#if HAL_SIM_GPS_EXTERNAL_FIFO_ENABLED
// this will be allocated if needed:
char *_gps_fifo;
#endif
bool _gps_has_basestation_position;
gps_data _gps_basestation_data;
void send_ubx(uint8_t msgid, uint8_t *buf, uint16_t size);
void update_ubx(const struct gps_data *d);
uint8_t nmea_checksum(const char *s);
void nmea_printf(const char *fmt, ...);
void update_nmea(const struct gps_data *d);
void sbp_send_message(uint16_t msg_type, uint16_t sender_id, uint8_t len, uint8_t *payload);
void update_sbp(const struct gps_data *d);
void update_sbp2(const struct gps_data *d);
#if AP_SIM_GPS_FILE_ENABLED
void update_file();
#endif
void update_nova(const struct gps_data *d);
void nova_send_message(uint8_t *header, uint8_t headerlength, uint8_t *payload, uint8_t payloadlen);
uint32_t CRC32Value(uint32_t icrc);
uint32_t CalculateBlockCRC32(uint32_t length, uint8_t *buffer, uint32_t crc);
// get delayed data
gps_data interpolate_data(const gps_data &d, uint32_t delay_ms);
};
}
#endif // HAL_SIM_GPS_ENABLED