/*
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/>.
*/
#pragma once
#include <AP_HAL/AP_HAL.h>
#include <AP_Notify/AP_Notify.h>
#include <AP_SerialManager/AP_SerialManager.h>
#include <AP_HAL/utility/RingBuffer.h>
#define FRSKY_TELEM_PAYLOAD_STATUS_CAPACITY 5 // size of the message buffer queue (max number of messages waiting to be sent)
/*
for FrSky D protocol (D-receivers)
*/
// FrSky sensor hub data IDs
#define DATA_ID_GPS_ALT_BP 0x01
#define DATA_ID_TEMP1 0x02
#define DATA_ID_FUEL 0x04
#define DATA_ID_TEMP2 0x05
#define DATA_ID_GPS_ALT_AP 0x09
#define DATA_ID_BARO_ALT_BP 0x10
#define DATA_ID_GPS_SPEED_BP 0x11
#define DATA_ID_GPS_LONG_BP 0x12
#define DATA_ID_GPS_LAT_BP 0x13
#define DATA_ID_GPS_COURS_BP 0x14
#define DATA_ID_GPS_SPEED_AP 0x19
#define DATA_ID_GPS_LONG_AP 0x1A
#define DATA_ID_GPS_LAT_AP 0x1B
#define DATA_ID_BARO_ALT_AP 0x21
#define DATA_ID_GPS_LONG_EW 0x22
#define DATA_ID_GPS_LAT_NS 0x23
#define DATA_ID_CURRENT 0x28
#define DATA_ID_VFAS 0x39
#define START_STOP_D 0x5E
#define BYTESTUFF_D 0x5D
/*
for FrSky SPort and SPort Passthrough (OpenTX) protocols (X-receivers)
*/
// FrSky Sensor IDs
#define SENSOR_ID_VARIO 0x00 // Sensor ID 0
#define SENSOR_ID_FAS 0x22 // Sensor ID 2
#define SENSOR_ID_GPS 0x83 // Sensor ID 3
#define SENSOR_ID_SP2UR 0xC6 // Sensor ID 6
#define SENSOR_ID_28 0x1B // Sensor ID 28
// FrSky data IDs
#define GPS_LONG_LATI_FIRST_ID 0x0800
#define DIY_FIRST_ID 0x5000
#define START_STOP_SPORT 0x7E
#define BYTESTUFF_SPORT 0x7D
#define SPORT_DATA_FRAME 0x10
/*
for FrSky SPort Passthrough
*/
// data bits preparation
// for parameter data
#define PARAM_ID_OFFSET 24
#define PARAM_VALUE_LIMIT 0xFFFFFF
// for gps status data
#define GPS_SATS_LIMIT 0xF
#define GPS_STATUS_LIMIT 0x3
#define GPS_STATUS_OFFSET 4
#define GPS_HDOP_OFFSET 6
#define GPS_ADVSTATUS_OFFSET 14
#define GPS_ALTMSL_OFFSET 22
// for battery data
#define BATT_VOLTAGE_LIMIT 0x1FF
#define BATT_CURRENT_OFFSET 9
#define BATT_TOTALMAH_LIMIT 0x7FFF
#define BATT_TOTALMAH_OFFSET 17
// for autopilot status data
#define AP_CONTROL_MODE_LIMIT 0x1F
#define AP_SIMPLE_OFFSET 5
#define AP_SSIMPLE_OFFSET 6
#define AP_FLYING_OFFSET 7
#define AP_ARMED_OFFSET 8
#define AP_BATT_FS_OFFSET 9
#define AP_EKF_FS_OFFSET 10
#define AP_IMU_TEMP_MIN 19.0f
#define AP_IMU_TEMP_MAX 82.0f
#define AP_IMU_TEMP_OFFSET 26
// for home position related data
#define HOME_ALT_OFFSET 12
#define HOME_BEARING_LIMIT 0x7F
#define HOME_BEARING_OFFSET 25
// for velocity and yaw data
#define VELANDYAW_XYVEL_OFFSET 9
#define VELANDYAW_YAW_LIMIT 0x7FF
#define VELANDYAW_YAW_OFFSET 17
// for attitude (roll, pitch) and range data
#define ATTIANDRNG_ROLL_LIMIT 0x7FF
#define ATTIANDRNG_PITCH_LIMIT 0x3FF
#define ATTIANDRNG_PITCH_OFFSET 11
#define ATTIANDRNG_RNGFND_OFFSET 21
// for fair scheduler
#define TIME_SLOT_MAX 11
class AP_Frsky_Telem {
public:
AP_Frsky_Telem();
/* Do not allow copies */
AP_Frsky_Telem(const AP_Frsky_Telem &other) = delete;
AP_Frsky_Telem &operator=(const AP_Frsky_Telem&) = delete;
// init - perform required initialisation
bool init();
// add statustext message to FrSky lib message queue
void queue_message(MAV_SEVERITY severity, const char *text);
// update error mask of sensors and subsystems. The mask uses the
// MAV_SYS_STATUS_* values from mavlink. If a bit is set then it
// indicates that the sensor or subsystem is present but not
// functioning correctly
uint32_t sensor_status_flags() const;
private:
AP_HAL::UARTDriver *_port; // UART used to send data to FrSky receiver
AP_SerialManager::SerialProtocol _protocol; // protocol used - detected using SerialManager's SERIAL#_PROTOCOL parameter
uint16_t _crc;
uint32_t check_sensor_status_timer;
uint32_t check_ekf_status_timer;
uint8_t _paramID;
ObjectArray<mavlink_statustext_t> _statustext_queue;
struct
{
char lat_ns, lon_ew;
uint16_t latdddmm;
uint16_t latmmmm;
uint16_t londddmm;
uint16_t lonmmmm;
uint16_t alt_gps_meters;
uint16_t alt_gps_cm;
uint16_t alt_nav_meters;
uint16_t alt_nav_cm;
int16_t speed_in_meter;
uint16_t speed_in_centimeter;
} _gps;
struct PACKED
{
bool send_latitude; // sizeof(bool) = 4 ?
uint32_t gps_lng_sample;
uint32_t last_poll_timer;
uint32_t avg_packet_counter;
uint32_t packet_timer[TIME_SLOT_MAX];
uint32_t packet_weight[TIME_SLOT_MAX];
uint8_t avg_packet_rate;
uint8_t new_byte;
} _passthrough;
struct
{
const uint32_t packet_min_period[TIME_SLOT_MAX] = {
0, //0x5000 text, no rate limiter
38, //0x5006 attitude 20Hz
280, //0x800 GPS 3Hz
280, //0x800 GPS 3Hz
250, //0x5005 vel&yaw 4Hz
500, //0x5001 AP status 2Hz
500, //0x5002 GPS status 2Hz
500, //0x5004 home 2Hz
500, //0x5008 batt 2 2Hz
500, //0x5003 batt 1 2Hz
1000 //0x5007 parameters 1Hz
};
} _sport_config;
struct
{
bool sport_status;
uint8_t fas_call;
uint8_t gps_call;
uint8_t vario_call;
uint8_t various_call;
} _SPort;
struct
{
uint32_t last_200ms_frame;
uint32_t last_1000ms_frame;
} _D;
struct
{
uint32_t chunk; // a "chunk" (four characters/bytes) at a time of the queued message to be sent
uint8_t repeats; // send each message "chunk" 3 times to make sure the entire messsage gets through without getting cut
uint8_t char_index; // index of which character to get in the message
} _msg_chunk;
// passthrough WFQ scheduler
void update_avg_packet_rate();
void passthrough_wfq_adaptive_scheduler(uint8_t prev_byte);
// main transmission function when protocol is FrSky SPort Passthrough (OpenTX)
void send_SPort_Passthrough(void);
// main transmission function when protocol is FrSky SPort
void send_SPort(void);
// main transmission function when protocol is FrSky D
void send_D(void);
// tick - main call to send updates to transmitter (called by scheduler at 1kHz)
void loop(void);
// methods related to the nuts-and-bolts of sending data
void calc_crc(uint8_t byte);
void send_crc(void);
void send_byte(uint8_t value);
void send_uint16(uint16_t id, uint16_t data);
void send_uint32(uint8_t frame, uint16_t id, uint32_t data);
// methods to convert flight controller data to FrSky SPort Passthrough (OpenTX) format
bool get_next_msg_chunk(void);
void check_sensor_status_flags(void);
void check_ekf_status(void);
uint32_t calc_param(void);
uint32_t calc_gps_latlng(bool *send_latitude);
uint32_t calc_gps_status(void);
uint32_t calc_batt(uint8_t instance);
uint32_t calc_ap_status(void);
uint32_t calc_home(void);
uint32_t calc_velandyaw(void);
uint32_t calc_attiandrng(void);
uint16_t prep_number(int32_t number, uint8_t digits, uint8_t power);
// methods to convert flight controller data to FrSky D or SPort format
void calc_nav_alt(void);
float format_gps(float dec);
void calc_gps_position(void);
};