ardupilot/Tools/AP_Periph/msp.cpp

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/*
output MSP protocol from AP_Periph for ArduPilot and INAV
Thanks to input from Konstantin Sharlaimov
*/
#include "AP_Periph.h"
#ifdef HAL_PERIPH_ENABLE_MSP
void AP_Periph_FW::msp_init(AP_HAL::UARTDriver *_uart)
{
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if (_uart) {
msp.port.uart = _uart;
msp.port.msp_version = MSP::MSP_V2_NATIVE;
_uart->begin(115200, 512, 512);
}
}
/*
send a MSP packet
*/
void AP_Periph_FW::send_msp_packet(uint16_t cmd, void *p, uint16_t size)
{
uint8_t out_buf[size+16] {};
MSP::msp_packet_t pkt = {
.buf = { .ptr = out_buf, .end = MSP_ARRAYEND(out_buf), },
.cmd = (int16_t)cmd,
.flags = 0,
.result = 0,
};
sbuf_write_data(&pkt.buf, p, size);
sbuf_switch_to_reader(&pkt.buf, &out_buf[0]);
MSP::msp_serial_encode(&msp.port, &pkt, MSP::MSP_V2_NATIVE, true);
}
/*
update MSP sensors
*/
void AP_Periph_FW::msp_sensor_update(void)
{
if (msp.port.uart == nullptr) {
return;
}
#ifdef HAL_PERIPH_ENABLE_GPS
send_msp_GPS();
#endif
#ifdef HAL_PERIPH_ENABLE_BARO
send_msp_baro();
#endif
#ifdef HAL_PERIPH_ENABLE_MAG
send_msp_compass();
#endif
#ifdef HAL_PERIPH_ENABLE_AIRSPEED
send_msp_airspeed();
#endif
}
#ifdef HAL_PERIPH_ENABLE_GPS
/*
send MSP GPS packet
*/
void AP_Periph_FW::send_msp_GPS(void)
{
MSP::msp_gps_data_message_t p;
if (gps.get_type(0) == AP_GPS::GPS_Type::GPS_TYPE_NONE) {
return;
}
if (msp.last_gps_ms == gps.last_message_time_ms(0)) {
return;
}
msp.last_gps_ms = gps.last_message_time_ms(0);
const Location &loc = gps.location(0);
const Vector3f &vel = gps.velocity(0);
p.instance = 0;
p.gps_week = gps.time_week(0);
p.ms_tow = gps.get_itow(0);
p.fix_type = uint8_t(gps.status(0));
p.satellites_in_view = gps.num_sats(0);
float hacc=0, vacc=0, sacc=0;
gps.horizontal_accuracy(0, hacc);
gps.vertical_accuracy(0, vacc);
gps.speed_accuracy(0, sacc);
p.horizontal_vel_accuracy = sacc*100;
p.horizontal_pos_accuracy = hacc*100;
p.vertical_pos_accuracy = vacc*100;
p.hdop = gps.get_hdop(0);
p.longitude = loc.lng;
p.latitude = loc.lat;
p.msl_altitude = loc.alt;
p.ned_vel_north = vel.x*100;
p.ned_vel_east = vel.y*100;
p.ned_vel_down = vel.z*100;
p.ground_course = wrap_360_cd(gps.ground_course(0)*100);
float yaw_deg=0, acc;
uint32_t time_ms;
if (gps.gps_yaw_deg(0, yaw_deg, acc, time_ms)) {
p.true_yaw = wrap_360_cd(yaw_deg*100);
} else {
p.true_yaw = 65535; // unknown
}
uint64_t tepoch_us = gps.time_epoch_usec(0);
time_t utc_sec = tepoch_us / (1000U * 1000U);
struct tm* tm = gmtime(&utc_sec);
p.year = tm->tm_year+1900;
p.month = tm->tm_mon;
p.day = tm->tm_mday;
p.hour = tm->tm_hour;
p.min = tm->tm_min;
p.sec = tm->tm_sec;
send_msp_packet(MSP2_SENSOR_GPS, &p, sizeof(p));
}
#endif // HAL_PERIPH_ENABLE_GPS
#ifdef HAL_PERIPH_ENABLE_BARO
/*
send MSP baro packet
*/
void AP_Periph_FW::send_msp_baro(void)
{
MSP::msp_baro_data_message_t p;
if (msp.last_baro_ms == baro.get_last_update(0)) {
return;
}
if (!baro.healthy()) {
// don't send any data
return;
}
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msp.last_baro_ms = baro.get_last_update(0);
p.instance = 0;
p.time_ms = msp.last_baro_ms;
p.pressure_pa = baro.get_pressure();
p.temp = baro.get_temperature() * 100;
send_msp_packet(MSP2_SENSOR_BAROMETER, &p, sizeof(p));
}
#endif // HAL_PERIPH_ENABLE_BARO
#ifdef HAL_PERIPH_ENABLE_MAG
/*
send MSP compass packet
*/
void AP_Periph_FW::send_msp_compass(void)
{
MSP::msp_compass_data_message_t p;
if (msp.last_mag_ms == compass.last_update_ms(0)) {
return;
}
if (!compass.healthy()) {
return;
}
msp.last_mag_ms = compass.last_update_ms(0);
const Vector3f &field = compass.get_field(0);
p.instance = 0;
p.time_ms = msp.last_mag_ms;
p.magX = field.x;
p.magY = field.y;
p.magZ = field.z;
send_msp_packet(MSP2_SENSOR_COMPASS, &p, sizeof(p));
}
#endif // HAL_PERIPH_ENABLE_MAG
#ifdef HAL_PERIPH_ENABLE_AIRSPEED
/*
send MSP airspeed packet
*/
void AP_Periph_FW::send_msp_airspeed(void)
{
MSP::msp_airspeed_data_message_t p;
const uint32_t last_update_ms = airspeed.last_update_ms();
if (msp.last_airspeed_ms == last_update_ms) {
return;
}
if (!airspeed.healthy()) {
// we don't report at all for an unhealthy sensor. This maps
// to unhealthy in the flight controller driver
return;
}
msp.last_airspeed_ms = last_update_ms;
p.instance = 0;
p.time_ms = msp.last_airspeed_ms;
p.pressure = airspeed.get_corrected_pressure();
float temp;
if (!airspeed.get_temperature(temp)) {
p.temp = INT16_MIN; //invalid temperature
} else {
p.temp = temp * 100;
}
send_msp_packet(MSP2_SENSOR_AIRSPEED, &p, sizeof(p));
}
#endif // HAL_PERIPH_ENABLE_AIRSPEED
#endif // HAL_PERIPH_ENABLE_MSP