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AP_NMEA_Output: add params and optimized

This commit is contained in:
Tom Pittenger 2023-01-10 10:33:54 -08:00 committed by Peter Barker
parent 95b4ded3e8
commit 3f5276c3d7
3 changed files with 186 additions and 146 deletions
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169
libraries/AP_NMEA_Output/AP_NMEA_Output.cpp
View File

@ -16,6 +16,7 @@
Author: Francisco Ferreira (some code is copied from sitl_gps.cpp)
*/
#define ALLOW_DOUBLE_MATH_FUNCTIONS
#include "AP_NMEA_Output.h"
@ -27,14 +28,45 @@
#include <AP_AHRS/AP_AHRS.h>
#include <AP_GPS/AP_GPS.h>
#include <AP_SerialManager/AP_SerialManager.h>
#include <AP_Common/NMEA.h>
#include <stdio.h>
#include <time.h>
AP_NMEA_Output::AP_NMEA_Output()
{
AP_SerialManager& sm = AP::serialmanager();
#ifndef AP_NMEA_OUTPUT_MESSAGE_ENABLED_DEFAULT
#define AP_NMEA_OUTPUT_MESSAGE_ENABLED_DEFAULT 3 // GPGGA and GPRMC
#endif
#define AP_NMEA_OUTPUT_INTERVAL_MS_MIN 10
#define AP_NMEA_OUTPUT_INTERVAL_MS_MAX 5000
extern const AP_HAL::HAL& hal;
const AP_Param::GroupInfo AP_NMEA_Output::var_info[] = {
// @Param: RATE_MS
// @DisplayName: NMEA Output rate
// @Description: NMEA Output rate. This controls the interval at which all the enabled NMEA messages are sent. Most NMEA systems expect 100ms (10Hz) or slower.
// @Range: 20 2000
// @Increment: 1
// @Units: ms
// @User: Standard
AP_GROUPINFO("RATE_MS", 1, AP_NMEA_Output, _interval_ms, 100),
// @Param: MSG_EN
// @DisplayName: Messages Enable bitmask
// @Description: This is a bitmask of enabled NMEA messages. All messages will be sent consecutively at the same rate interval
// @Bitmask: 0:GPGGA,1:GPRMC,2:PASHR
// @User: Standard
AP_GROUPINFO("MSG_EN", 2, AP_NMEA_Output, _message_enable_bitmask, AP_NMEA_OUTPUT_MESSAGE_ENABLED_DEFAULT),
AP_GROUPEND
};
void AP_NMEA_Output::init()
{
const AP_SerialManager& sm = AP::serialmanager();
_num_outputs = 0;
for (uint8_t i = 0; i < ARRAY_SIZE(_uart); i++) {
_uart[i] = sm.find_serial(AP_SerialManager::SerialProtocol_NMEAOutput, i);
@ -45,34 +77,15 @@ AP_NMEA_Output::AP_NMEA_Output()
}
}
AP_NMEA_Output* AP_NMEA_Output::probe()
{
AP_NMEA_Output *ret = new AP_NMEA_Output();
if (ret == nullptr || ret->_num_outputs == 0) {
delete ret;
return nullptr;
}
return ret;
}
uint8_t AP_NMEA_Output::_nmea_checksum(const char *str)
{
uint8_t checksum = 0;
const uint8_t* bytes = (const uint8_t*) str;
for (uint16_t i = 1; str[i]; i++) {
checksum ^= bytes[i];
}
return checksum;
}
void AP_NMEA_Output::update()
{
if (_num_outputs == 0 || _message_enable_bitmask == 0) {
return;
}
const uint32_t now_ms = AP_HAL::millis();
// only send at 10Hz
if ((now_ms - _last_run_ms) < 100) {
if ((now_ms - _last_run_ms) < static_cast<uint32_t>(MAX(_interval_ms.get(), 20))) {
return;
}
_last_run_ms = now_ms;
@ -83,6 +96,8 @@ void AP_NMEA_Output::update()
return;
}
uint32_t space_required = 0;
// not completely accurate, our time includes leap seconds and time_t should be without
const time_t time_sec = time_usec / 1000000;
struct tm* tm = gmtime(&time_sec);
@ -91,15 +106,15 @@ void AP_NMEA_Output::update()
char tstring[11];
snprintf(tstring, sizeof(tstring), "%02u%02u%06.3f", tm->tm_hour, tm->tm_min, tm->tm_sec + (time_usec % 1000000) * 1.0e-6);
// format date string
char dstring[7];
snprintf(dstring, sizeof(dstring), "%02u%02u%02u", tm->tm_mday, tm->tm_mon+1, tm->tm_year % 100);
auto &ahrs = AP::ahrs();
// get location (note: get_location from AHRS always returns true after having GPS position once)
Location loc;
bool pos_valid = ahrs.get_location(loc);
#ifndef HAL_BUILD_AP_PERIPH
auto &ahrs = AP::ahrs();
const bool pos_valid = ahrs.get_location(loc);
#else
const bool pos_valid = AP::gps().status() >= AP_GPS::GPS_OK_FIX_3D;
loc = AP::gps().location();
#endif
// format latitude
char lat_string[13];
@ -112,7 +127,6 @@ void AP_NMEA_Output::update()
min_dec,
loc.lat < 0 ? 'S' : 'N');
// format longitude
char lng_string[14];
deg = fabs(loc.lng * 1.0e-7f);
@ -124,9 +138,12 @@ void AP_NMEA_Output::update()
min_dec,
loc.lng < 0 ? 'W' : 'E');
char gga[100];
uint16_t gga_length = 0;
if ((_message_enable_bitmask.get() & static_cast<int16_t>(Enabled_Messages::GPGGA)) != 0) {
// format GGA message
char* gga = nullptr;
int16_t gga_res = asprintf(&gga,
gga_length = nmea_printf_buffer(gga, sizeof(gga),
"$GPGGA,%s,%s,%s,%01d,%02d,%04.1f,%07.2f,M,0.0,M,,",
tstring,
lat_string,
@ -135,20 +152,31 @@ void AP_NMEA_Output::update()
pos_valid ? 6 : 3,
2.0,
loc.alt * 0.01f);
if (gga_res == -1) {
return;
space_required += gga_length;
}
char gga_end[6];
snprintf(gga_end, sizeof(gga_end), "*%02X\r\n", (unsigned) _nmea_checksum(gga));
char rmc[100];
uint16_t rmc_length = 0;
if ((_message_enable_bitmask.get() & static_cast<int16_t>(Enabled_Messages::GPRMC)) != 0) {
// format date string
char dstring[7];
snprintf(dstring, sizeof(dstring), "%02u%02u%02u", tm->tm_mday, tm->tm_mon+1, tm->tm_year % 100);
// get speed
Vector2f speed = ahrs.groundspeed_vector();
float speed_knots = speed.length() * M_PER_SEC_TO_KNOTS;
float heading = wrap_360(degrees(atan2f(speed.x, speed.y)));
#ifndef HAL_BUILD_AP_PERIPH
const Vector2f speed = ahrs.groundspeed_vector();
const float speed_knots = speed.length() * M_PER_SEC_TO_KNOTS;
const float heading = wrap_360(degrees(atan2f(speed.x, speed.y)));
#else
const float speed_knots = AP::gps().ground_speed() * M_PER_SEC_TO_KNOTS;
const float heading = AP::gps().ground_course();
#endif
// format RMC message
char* rmc = nullptr;
int16_t rmc_res = asprintf(&rmc,
rmc_length = nmea_printf_buffer(rmc, sizeof(rmc),
"$GPRMC,%s,%c,%s,%s,%.2f,%.2f,%s,,",
tstring,
pos_valid ? 'A' : 'V',
@ -157,14 +185,14 @@ void AP_NMEA_Output::update()
speed_knots,
heading,
dstring);
if (rmc_res == -1) {
free(gga);
return;
space_required += rmc_length;
}
char rmc_end[6];
snprintf(rmc_end, sizeof(rmc_end), "*%02X\r\n", (unsigned) _nmea_checksum(rmc));
uint16_t pashr_length = 0;
char pashr[100];
#ifndef HAL_BUILD_AP_PERIPH
if ((_message_enable_bitmask.get() & static_cast<int16_t>(Enabled_Messages::PASHR)) != 0) {
// get roll, pitch, yaw
const float roll_deg = wrap_180(degrees(ahrs.get_roll()));
const float pitch_deg = wrap_180(degrees(ahrs.get_pitch()));
@ -190,8 +218,7 @@ void AP_NMEA_Output::update()
(!ahrs.have_inertial_nav() || AP::ins().accel_calibrated_ok_all());
// format PASHR message
char* pashr = nullptr;
int16_t pashr_res = asprintf(&pashr,
pashr_length = nmea_printf_buffer(pashr, sizeof(pashr),
"$PASHR,%s,%.2f,T,%c%.2f,%c%.2f,%c%.2f,%.3f,%.3f,%.3f,%u,%u",
tstring,
yaw_deg, // This is a TRUE NORTH value
@ -203,16 +230,10 @@ void AP_NMEA_Output::update()
heading_deg_accuracy,
(unsigned)gps_status_flag,
(unsigned)ins_status_flag);
if (pashr_res == -1) {
free(gga);
free(rmc);
return;
space_required += pashr_length;
}
char pashr_end[6];
snprintf(pashr_end, sizeof(pashr_end), "*%02X\r\n", (unsigned) _nmea_checksum(pashr));
const uint32_t space_required = strlen(gga) + strlen(gga_end) + strlen(rmc) + strlen(rmc_end) + strlen(pashr) + strlen(pashr_end);
#endif
// send to all NMEA output ports
for (uint8_t i = 0; i < _num_outputs; i++) {
@ -220,19 +241,19 @@ void AP_NMEA_Output::update()
continue;
}
if (gga_length > 0) {
_uart[i]->write(gga);
_uart[i]->write(gga_end);
_uart[i]->write(rmc);
_uart[i]->write(rmc_end);
_uart[i]->write(pashr);
_uart[i]->write(pashr_end);
}
free(gga);
free(rmc);
free(pashr);
if (rmc_length > 0) {
_uart[i]->write(rmc);
}
if (pashr_length > 0) {
_uart[i]->write(pashr);
}
}
}
#endif // HAL_NMEA_OUTPUT_ENABLED

32
libraries/AP_NMEA_Output/AP_NMEA_Output.h
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@ -19,11 +19,7 @@
#pragma once
#include <AP_HAL/AP_HAL.h>
#ifndef HAL_NMEA_OUTPUT_ENABLED
#define HAL_NMEA_OUTPUT_ENABLED !HAL_MINIMIZE_FEATURES
#endif
#include "AP_NMEA_Output_config.h"
#if HAL_NMEA_OUTPUT_ENABLED
@ -31,25 +27,41 @@
#define NMEA_MAX_OUTPUTS 3
#endif
#include <AP_Param/AP_Param.h>
class AP_NMEA_Output {
public:
static AP_NMEA_Output* probe();
AP_NMEA_Output() {
// setup parameter defaults
AP_Param::setup_object_defaults(this, var_info);
}
/* Do not allow copies */
CLASS_NO_COPY(AP_NMEA_Output);
void update();
private:
AP_NMEA_Output();
void init();
uint8_t _nmea_checksum(const char *str);
enum class Enabled_Messages {
GPGGA = (1<<0),
GPRMC = (1<<1),
PASHR = (1<<2),
};
static const struct AP_Param::GroupInfo var_info[];
private:
uint8_t _num_outputs;
AP_HAL::UARTDriver* _uart[NMEA_MAX_OUTPUTS];
uint32_t _last_run_ms;
AP_Int16 _interval_ms;
AP_Int16 _message_enable_bitmask;
};
#endif // !HAL_MINIMIZE_FEATURES
#endif // !HAL_NMEA_OUTPUT_ENABLED

7
libraries/AP_NMEA_Output/AP_NMEA_Output_config.h Normal file
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@ -0,0 +1,7 @@
#include <AP_HAL/AP_HAL_Boards.h>
#include <GCS_MAVLink/GCS_config.h>
// Needs SerialManager + (AHRS or GPS)
#ifndef HAL_NMEA_OUTPUT_ENABLED
#define HAL_NMEA_OUTPUT_ENABLED !HAL_MINIMIZE_FEATURES && HAL_GCS_ENABLED
#endif