/** * @brief Use the INSGPS fusion algorithm in either indoor or outdoor mode (use GPS) * @params[in] first_run This is the first run so trigger reinitialization * @params[in] outdoor_mode If true use the GPS for position, if false weakly pull to (0,0) * @return 0 for success, -1 for failure */ static int32_t updateAttitudeINSGPS(bool first_run, bool outdoor_mode) { UAVObjEvent ev; GyrosData gyrosData; AccelsData accelsData; MagnetometerData magData; BaroAltitudeData baroData; GPSPositionData gpsData; GPSVelocityData gpsVelData; GyrosBiasData gyrosBias; static bool mag_updated = false; static bool baro_updated; static bool gps_updated; static bool gps_vel_updated; static float baroOffset = 0; static uint32_t ins_last_time = 0; static bool inited; float NED[3] = {0.0f, 0.0f, 0.0f}; float vel[3] = {0.0f, 0.0f, 0.0f}; float zeros[3] = {0.0f, 0.0f, 0.0f}; // Perform the update uint16_t sensors = 0; float dT; // Wait until the gyro and accel object is updated, if a timeout then go to failsafe if ( (xQueueReceive(gyroQueue, &ev, FAILSAFE_TIMEOUT_MS / portTICK_RATE_MS) != pdTRUE) || (xQueueReceive(accelQueue, &ev, 1 / portTICK_RATE_MS) != pdTRUE) ) { // Do not set attitude timeout warnings in simulation mode if (!AttitudeActualReadOnly()){ AlarmsSet(SYSTEMALARMS_ALARM_ATTITUDE,SYSTEMALARMS_ALARM_WARNING); return -1; } } if (inited) { mag_updated = 0; baro_updated = 0; gps_updated = 0; gps_vel_updated = 0; } if (first_run) { inited = false; init_stage = 0; mag_updated = 0; baro_updated = 0; gps_updated = 0; gps_vel_updated = 0; ins_last_time = PIOS_DELAY_GetRaw(); return 0; } mag_updated |= (xQueueReceive(magQueue, &ev, 0 / portTICK_RATE_MS) == pdTRUE); baro_updated |= xQueueReceive(baroQueue, &ev, 0 / portTICK_RATE_MS) == pdTRUE; gps_updated |= (xQueueReceive(gpsQueue, &ev, 0 / portTICK_RATE_MS) == pdTRUE) && outdoor_mode; gps_vel_updated |= (xQueueReceive(gpsVelQueue, &ev, 0 / portTICK_RATE_MS) == pdTRUE) && outdoor_mode; // Get most recent data GyrosGet(&gyrosData); AccelsGet(&accelsData); MagnetometerGet(&magData); BaroAltitudeGet(&baroData); GPSPositionGet(&gpsData); GPSVelocityGet(&gpsVelData); GyrosBiasGet(&gyrosBias); // Discard mag if it has NAN (normally from bad calibration) mag_updated &= (magData.x == magData.x && magData.y == magData.y && magData.z == magData.z); // Don't require HomeLocation.Set to be true but at least require a mag configuration (allows easily // switching between indoor and outdoor mode with Set = false) mag_updated &= (homeLocation.Be[0] != 0 || homeLocation.Be[1] != 0 || homeLocation.Be[2]); // Have a minimum requirement for gps usage gps_updated &= (gpsData.Satellites >= 7) && (gpsData.PDOP <= 4.0f) && (homeLocation.Set == HOMELOCATION_SET_TRUE); if (!inited) AlarmsSet(SYSTEMALARMS_ALARM_ATTITUDE,SYSTEMALARMS_ALARM_ERROR); else if (outdoor_mode && gpsData.Satellites < 7) AlarmsSet(SYSTEMALARMS_ALARM_ATTITUDE,SYSTEMALARMS_ALARM_ERROR); else AlarmsClear(SYSTEMALARMS_ALARM_ATTITUDE); if (!inited && mag_updated && baro_updated && (gps_updated || !outdoor_mode)) { // Don't initialize until all sensors are read if (init_stage == 0 && !outdoor_mode) { float Pdiag[16]={25.0f,25.0f,25.0f,5.0f,5.0f,5.0f,1e-5f,1e-5f,1e-5f,1e-5f,1e-5f,1e-5f,1e-5f,1e-4f,1e-4f,1e-4f}; float q[4]; float pos[3] = {0.0f, 0.0f, 0.0f}; // Initialize barometric offset to homelocation altitude baroOffset = -baroData.Altitude; pos[2] = -(baroData.Altitude + baroOffset); // Reset the INS algorithm INSGPSInit(); INSSetMagVar(revoCalibration.mag_var); INSSetAccelVar(revoCalibration.accel_var); INSSetGyroVar(revoCalibration.gyro_var); INSSetBaroVar(revoCalibration.baro_var); // Initialize the gyro bias from the settings float gyro_bias[3] = {gyrosBias.x * F_PI / 180.0f, gyrosBias.y * F_PI / 180.0f, gyrosBias.z * F_PI / 180.0f}; INSSetGyroBias(gyro_bias); xQueueReceive(magQueue, &ev, 100 / portTICK_RATE_MS); MagnetometerGet(&magData); // Set initial attitude AttitudeActualData attitudeActual; attitudeActual.Roll = atan2f(-accelsData.y, -accelsData.z) * 180.0f / F_PI; attitudeActual.Pitch = atan2f(accelsData.x, -accelsData.z) * 180.0f / F_PI; attitudeActual.Yaw = atan2f(-magData.y, magData.x) * 180.0f / F_PI; RPY2Quaternion(&attitudeActual.Roll,&attitudeActual.q1); AttitudeActualSet(&attitudeActual); q[0] = attitudeActual.q1; q[1] = attitudeActual.q2; q[2] = attitudeActual.q3; q[3] = attitudeActual.q4; INSSetState(pos, zeros, q, zeros, zeros); INSResetP(Pdiag); } else if (init_stage == 0 && outdoor_mode) { float Pdiag[16]={25.0f,25.0f,25.0f,5.0f,5.0f,5.0f,1e-5f,1e-5f,1e-5f,1e-5f,1e-5f,1e-5f,1e-5f,1e-4f,1e-4f,1e-4f}; float q[4]; float NED[3]; // Reset the INS algorithm INSGPSInit(); INSSetMagVar(revoCalibration.mag_var); INSSetAccelVar(revoCalibration.accel_var); INSSetGyroVar(revoCalibration.gyro_var); INSSetBaroVar(revoCalibration.baro_var); INSSetMagNorth(homeLocation.Be); // Initialize the gyro bias from the settings float gyro_bias[3] = {gyrosBias.x * F_PI / 180.0f, gyrosBias.y * F_PI / 180.0f, gyrosBias.z * F_PI / 180.0f}; INSSetGyroBias(gyro_bias); GPSPositionData gpsPosition; GPSPositionGet(&gpsPosition); // Transform the GPS position into NED coordinates getNED(&gpsPosition, NED); // Initialize barometric offset to cirrent GPS NED coordinate baroOffset = -NED[2] - baroData.Altitude; xQueueReceive(magQueue, &ev, 100 / portTICK_RATE_MS); MagnetometerGet(&magData); // Set initial attitude AttitudeActualData attitudeActual; attitudeActual.Roll = atan2f(-accelsData.y, -accelsData.z) * 180.0f / F_PI; attitudeActual.Pitch = atan2f(accelsData.x, -accelsData.z) * 180.0f / F_PI; attitudeActual.Yaw = atan2f(-magData.y, magData.x) * 180.0f / F_PI; RPY2Quaternion(&attitudeActual.Roll,&attitudeActual.q1); AttitudeActualSet(&attitudeActual); q[0] = attitudeActual.q1; q[1] = attitudeActual.q2; q[2] = attitudeActual.q3; q[3] = attitudeActual.q4; INSSetState(NED, zeros, q, zeros, zeros); INSResetP(Pdiag); } else if (init_stage > 0) { // Run prediction a bit before any corrections dT = PIOS_DELAY_DiffuS(ins_last_time) / 1.0e6f; GyrosBiasGet(&gyrosBias); float gyros[3] = {(gyrosData.x + gyrosBias.x) * F_PI / 180.0f, (gyrosData.y + gyrosBias.y) * F_PI / 180.0f, (gyrosData.z + gyrosBias.z) * F_PI / 180.0f}; INSStatePrediction(gyros, &accelsData.x, dT); AttitudeActualData attitude; AttitudeActualGet(&attitude); attitude.q1 = Nav.q[0]; attitude.q2 = Nav.q[1]; attitude.q3 = Nav.q[2]; attitude.q4 = Nav.q[3]; Quaternion2RPY(&attitude.q1,&attitude.Roll); AttitudeActualSet(&attitude); } init_stage++; if(init_stage > 10) inited = true; ins_last_time = PIOS_DELAY_GetRaw(); return 0; } if (!inited) return 0; dT = PIOS_DELAY_DiffuS(ins_last_time) / 1.0e6f; ins_last_time = PIOS_DELAY_GetRaw(); // This should only happen at start up or at mode switches if(dT > 0.01f) dT = 0.01f; else if(dT <= 0.001f) dT = 0.001f; // If the gyro bias setting was updated we should reset // the state estimate of the EKF if(gyroBiasSettingsUpdated) { float gyro_bias[3] = {gyrosBias.x * F_PI / 180.0f, gyrosBias.y * F_PI / 180.0f, gyrosBias.z * F_PI / 180.0f}; INSSetGyroBias(gyro_bias); gyroBiasSettingsUpdated = false; } // Because the sensor module remove the bias we need to add it // back in here so that the INS algorithm can track it correctly float gyros[3] = {gyrosData.x * F_PI / 180.0f, gyrosData.y * F_PI / 180.0f, gyrosData.z * F_PI / 180.0f}; if (revoCalibration.BiasCorrectedRaw == REVOCALIBRATION_BIASCORRECTEDRAW_TRUE) { gyros[0] += gyrosBias.x * F_PI / 180.0f; gyros[1] += gyrosBias.y * F_PI / 180.0f; gyros[2] += gyrosBias.z * F_PI / 180.0f; } // Advance the state estimate INSStatePrediction(gyros, &accelsData.x, dT); // Copy the attitude into the UAVO AttitudeActualData attitude; AttitudeActualGet(&attitude); attitude.q1 = Nav.q[0]; attitude.q2 = Nav.q[1]; attitude.q3 = Nav.q[2]; attitude.q4 = Nav.q[3]; Quaternion2RPY(&attitude.q1,&attitude.Roll); AttitudeActualSet(&attitude); // Advance the covariance estimate INSCovariancePrediction(dT); if(mag_updated) sensors |= MAG_SENSORS; if(baro_updated) sensors |= BARO_SENSOR; INSSetMagNorth(homeLocation.Be); if (gps_updated && outdoor_mode) { INSSetPosVelVar(revoCalibration.gps_var[REVOCALIBRATION_GPS_VAR_POS], revoCalibration.gps_var[REVOCALIBRATION_GPS_VAR_VEL]); sensors |= POS_SENSORS; if (0) { // Old code to take horizontal velocity from GPS Position update sensors |= HORIZ_SENSORS; vel[0] = gpsData.Groundspeed * cosf(gpsData.Heading * F_PI / 180.0f); vel[1] = gpsData.Groundspeed * sinf(gpsData.Heading * F_PI / 180.0f); vel[2] = 0; } // Transform the GPS position into NED coordinates getNED(&gpsData, NED); // Track barometric altitude offset with a low pass filter baroOffset = BARO_OFFSET_LOWPASS_ALPHA * baroOffset + (1.0f - BARO_OFFSET_LOWPASS_ALPHA ) * ( -NED[2] - baroData.Altitude ); } else if (!outdoor_mode) { INSSetPosVelVar(1e2f, 1e2f); vel[0] = vel[1] = vel[2] = 0; NED[0] = NED[1] = 0; NED[2] = -(baroData.Altitude + baroOffset); sensors |= HORIZ_SENSORS | HORIZ_POS_SENSORS; sensors |= POS_SENSORS |VERT_SENSORS; } if (gps_vel_updated && outdoor_mode) { sensors |= HORIZ_SENSORS | VERT_SENSORS; vel[0] = gpsVelData.North; vel[1] = gpsVelData.East; vel[2] = gpsVelData.Down; } /* * TODO: Need to add a general sanity check for all the inputs to make sure their kosher * although probably should occur within INS itself */ if (sensors) INSCorrection(&magData.x, NED, vel, ( baroData.Altitude + baroOffset ), sensors); // Copy the position and velocity into the UAVO PositionActualData positionActual; PositionActualGet(&positionActual); positionActual.North = Nav.Pos[0]; positionActual.East = Nav.Pos[1]; positionActual.Down = Nav.Pos[2]; PositionActualSet(&positionActual); VelocityActualData velocityActual; VelocityActualGet(&velocityActual); velocityActual.North = Nav.Vel[0]; velocityActual.East = Nav.Vel[1]; velocityActual.Down = Nav.Vel[2]; VelocityActualSet(&velocityActual); if (revoCalibration.BiasCorrectedRaw == REVOCALIBRATION_BIASCORRECTEDRAW_TRUE && !gyroBiasSettingsUpdated) { // Copy the gyro bias into the UAVO except when it was updated // from the settings during the calculation, then consume it // next cycle gyrosBias.x = Nav.gyro_bias[0] * 180.0f / F_PI; gyrosBias.y = Nav.gyro_bias[1] * 180.0f / F_PI; gyrosBias.z = Nav.gyro_bias[2] * 180.0f / F_PI; GyrosBiasSet(&gyrosBias); } return 0; }
int main() { float gyro[3], accel[3], mag[3]; float vel[3] = { 0, 0, 0 }; /* Normaly we get/set UAVObjects but this one only needs to be set. We will never expect to get this from another module*/ AttitudeActualData attitude_actual; AHRSSettingsData ahrs_settings; /* Brings up System using CMSIS functions, enables the LEDs. */ PIOS_SYS_Init(); /* Delay system */ PIOS_DELAY_Init(); /* Communication system */ PIOS_COM_Init(); /* ADC system */ AHRS_ADC_Config( adc_oversampling ); /* Setup the Accelerometer FS (Full-Scale) GPIO */ PIOS_GPIO_Enable( 0 ); SET_ACCEL_2G; #if defined(PIOS_INCLUDE_HMC5843) && defined(PIOS_INCLUDE_I2C) /* Magnetic sensor system */ PIOS_I2C_Init(); PIOS_HMC5843_Init(); // Get 3 ID bytes strcpy(( char * )mag_data.id, "ZZZ" ); PIOS_HMC5843_ReadID( mag_data.id ); #endif /* SPI link to master */ // PIOS_SPI_Init(); AhrsInitComms(); AHRSCalibrationConnectCallback( calibration_callback ); GPSPositionConnectCallback( gps_callback ); ahrs_state = AHRS_IDLE; while( !AhrsLinkReady() ) { AhrsPoll(); while( ahrs_state != AHRS_DATA_READY ) ; ahrs_state = AHRS_PROCESSING; downsample_data(); ahrs_state = AHRS_IDLE; if(( total_conversion_blocks % 50 ) == 0 ) PIOS_LED_Toggle( LED1 ); } AHRSSettingsGet(&ahrs_settings); /* Use simple averaging filter for now */ for( int i = 0; i < adc_oversampling; i++ ) fir_coeffs[i] = 1; fir_coeffs[adc_oversampling] = adc_oversampling; if( ahrs_settings.Algorithm == AHRSSETTINGS_ALGORITHM_INSGPS) { // compute a data point and initialize INS downsample_data(); converge_insgps(); } #ifdef DUMP_RAW int previous_conversion; while( 1 ) { AhrsPoll(); int result; uint8_t framing[16] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 }; while( ahrs_state != AHRS_DATA_READY ) ; ahrs_state = AHRS_PROCESSING; if( total_conversion_blocks != previous_conversion + 1 ) PIOS_LED_On( LED1 ); // not keeping up else PIOS_LED_Off( LED1 ); previous_conversion = total_conversion_blocks; downsample_data(); ahrs_state = AHRS_IDLE;; // Dump raw buffer result = PIOS_COM_SendBuffer( PIOS_COM_AUX, &framing[0], 16 ); // framing header result += PIOS_COM_SendBuffer( PIOS_COM_AUX, ( uint8_t * ) & total_conversion_blocks, sizeof( total_conversion_blocks ) ); // dump block number result += PIOS_COM_SendBuffer( PIOS_COM_AUX, ( uint8_t * ) & valid_data_buffer[0], ADC_OVERSAMPLE * ADC_CONTINUOUS_CHANNELS * sizeof( valid_data_buffer[0] ) ); if( result == 0 ) PIOS_LED_Off( LED1 ); else { PIOS_LED_On( LED1 ); } } #endif timer_start(); /******************* Main EKF loop ****************************/ while( 1 ) { AhrsPoll(); AHRSCalibrationData calibration; AHRSCalibrationGet( &calibration ); BaroAltitudeData baro_altitude; BaroAltitudeGet( &baro_altitude ); GPSPositionData gps_position; GPSPositionGet( &gps_position ); AHRSSettingsGet(&ahrs_settings); // Alive signal if(( total_conversion_blocks % 100 ) == 0 ) PIOS_LED_Toggle( LED1 ); #if defined(PIOS_INCLUDE_HMC5843) && defined(PIOS_INCLUDE_I2C) // Get magnetic readings if( PIOS_HMC5843_NewDataAvailable() ) { PIOS_HMC5843_ReadMag( mag_data.raw.axis ); mag_data.updated = 1; } attitude_raw.magnetometers[0] = mag_data.raw.axis[0]; attitude_raw.magnetometers[2] = mag_data.raw.axis[1]; attitude_raw.magnetometers[2] = mag_data.raw.axis[2]; #endif // Delay for valid data counter_val = timer_count(); running_counts = counter_val - last_counter_idle_end; last_counter_idle_start = counter_val; while( ahrs_state != AHRS_DATA_READY ) ; counter_val = timer_count(); idle_counts = counter_val - last_counter_idle_start; last_counter_idle_end = counter_val; ahrs_state = AHRS_PROCESSING; downsample_data(); /***************** SEND BACK SOME RAW DATA ************************/ // Hacky - grab one sample from buffer to populate this. Need to send back // all raw data if it's happening accel_data.raw.x = valid_data_buffer[0]; accel_data.raw.y = valid_data_buffer[2]; accel_data.raw.z = valid_data_buffer[4]; gyro_data.raw.x = valid_data_buffer[1]; gyro_data.raw.y = valid_data_buffer[3]; gyro_data.raw.z = valid_data_buffer[5]; gyro_data.temp.xy = valid_data_buffer[6]; gyro_data.temp.z = valid_data_buffer[7]; if( ahrs_settings.Algorithm == AHRSSETTINGS_ALGORITHM_INSGPS) { /******************** INS ALGORITHM **************************/ // format data for INS algo gyro[0] = gyro_data.filtered.x; gyro[1] = gyro_data.filtered.y; gyro[2] = gyro_data.filtered.z; accel[0] = accel_data.filtered.x, accel[1] = accel_data.filtered.y, accel[2] = accel_data.filtered.z, // Note: The magnetometer driver returns registers X,Y,Z from the chip which are // (left, backward, up). Remapping to (forward, right, down). mag[0] = -( mag_data.raw.axis[1] - calibration.mag_bias[1] ); mag[1] = -( mag_data.raw.axis[0] - calibration.mag_bias[0] ); mag[2] = -( mag_data.raw.axis[2] - calibration.mag_bias[2] ); INSStatePrediction( gyro, accel, 1 / ( float )EKF_RATE ); INSCovariancePrediction( 1 / ( float )EKF_RATE ); if( gps_updated && gps_position.Status == GPSPOSITION_STATUS_FIX3D ) { // Compute velocity from Heading and groundspeed vel[0] = gps_position.Groundspeed * cos( gps_position.Heading * M_PI / 180 ); vel[1] = gps_position.Groundspeed * sin( gps_position.Heading * M_PI / 180 ); // Completely unprincipled way to make the position variance // increase as data quality decreases but keep it bounded // Variance becomes 40 m^2 and 40 (m/s)^2 when no gps INSSetPosVelVar( 0.004 ); HomeLocationData home; HomeLocationGet( &home ); float ned[3]; double lla[3] = {( double ) gps_position.Latitude / 1e7, ( double ) gps_position.Longitude / 1e7, ( double )( gps_position.GeoidSeparation + gps_position.Altitude )}; // convert from cm back to meters double ecef[3] = {( double )( home.ECEF[0] / 100 ), ( double )( home.ECEF[1] / 100 ), ( double )( home.ECEF[2] / 100 )}; LLA2Base( lla, ecef, ( float( * )[3] ) home.RNE, ned ); if( gps_updated ) { //FIXME: Is this correct? //TOOD: add check for altitude updates FullCorrection( mag, ned, vel, baro_altitude.Altitude ); gps_updated = false; } else { GpsBaroCorrection( ned, vel, baro_altitude.Altitude ); } gps_updated = false; mag_data.updated = 0; } else if( gps_position.Status == GPSPOSITION_STATUS_FIX3D && mag_data.updated == 1 ) { MagCorrection( mag ); // only trust mags if outdoors mag_data.updated = 0; } else { // Indoors, update with zero position and velocity and high covariance INSSetPosVelVar( 0.1 ); vel[0] = 0; vel[1] = 0; vel[2] = 0; VelBaroCorrection( vel, baro_altitude.Altitude ); // MagVelBaroCorrection(mag,vel,altitude_data.altitude); // only trust mags if outdoors } attitude_actual.q1 = Nav.q[0]; attitude_actual.q2 = Nav.q[1]; attitude_actual.q3 = Nav.q[2]; attitude_actual.q4 = Nav.q[3]; } else if( ahrs_settings.Algorithm == AHRSSETTINGS_ALGORITHM_SIMPLE ) { float q[4]; float rpy[3]; /***************** SIMPLE ATTITUDE FROM NORTH AND ACCEL ************/ /* Very simple computation of the heading and attitude from accel. */ rpy[2] = atan2(( mag_data.raw.axis[0] ), ( -1 * mag_data.raw.axis[1] ) ) * 180 / M_PI; rpy[1] = atan2( accel_data.filtered.x, accel_data.filtered.z ) * 180 / M_PI; rpy[0] = atan2( accel_data.filtered.y, accel_data.filtered.z ) * 180 / M_PI; RPY2Quaternion( rpy, q ); attitude_actual.q1 = q[0]; attitude_actual.q2 = q[1]; attitude_actual.q3 = q[2]; attitude_actual.q4 = q[3]; } ahrs_state = AHRS_IDLE; #ifdef DUMP_FRIENDLY PIOS_COM_SendFormattedStringNonBlocking( PIOS_COM_AUX, "b: %d\r\n", total_conversion_blocks ); PIOS_COM_SendFormattedStringNonBlocking( PIOS_COM_AUX, "a: %d %d %d\r\n", ( int16_t )( accel_data.filtered.x * 1000 ), ( int16_t )( accel_data.filtered.y * 1000 ), ( int16_t )( accel_data.filtered.z * 1000 ) ); PIOS_COM_SendFormattedStringNonBlocking( PIOS_COM_AUX, "g: %d %d %d\r\n", ( int16_t )( gyro_data.filtered.x * 1000 ), ( int16_t )( gyro_data.filtered.y * 1000 ), ( int16_t )( gyro_data.filtered.z * 1000 ) ); PIOS_COM_SendFormattedStringNonBlocking( PIOS_COM_AUX, "m: %d %d %d\r\n", mag_data.raw.axis[0], mag_data.raw.axis[1], mag_data.raw.axis[2] ); PIOS_COM_SendFormattedStringNonBlocking( PIOS_COM_AUX, "q: %d %d %d %d\r\n", ( int16_t )( Nav.q[0] * 1000 ), ( int16_t )( Nav.q[1] * 1000 ), ( int16_t )( Nav.q[2] * 1000 ), ( int16_t )( Nav.q[3] * 1000 ) ); #endif #ifdef DUMP_EKF uint8_t framing[16] = { 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 }; extern float F[NUMX][NUMX], G[NUMX][NUMW], H[NUMV][NUMX]; // linearized system matrices extern float P[NUMX][NUMX], X[NUMX]; // covariance matrix and state vector extern float Q[NUMW], R[NUMV]; // input noise and measurement noise variances extern float K[NUMX][NUMV]; // feedback gain matrix // Dump raw buffer int8_t result; result = PIOS_COM_SendBuffer( PIOS_COM_AUX, &framing[0], 16 ); // framing header result += PIOS_COM_SendBuffer( PIOS_COM_AUX, ( uint8_t * ) & total_conversion_blocks, sizeof( total_conversion_blocks ) ); // dump block number result += PIOS_COM_SendBuffer( PIOS_COM_AUX, ( uint8_t * ) & mag_data, sizeof( mag_data ) ); result += PIOS_COM_SendBuffer( PIOS_COM_AUX, ( uint8_t * ) & gps_data, sizeof( gps_data ) ); result += PIOS_COM_SendBuffer( PIOS_COM_AUX, ( uint8_t * ) & accel_data, sizeof( accel_data ) ); result += PIOS_COM_SendBuffer( PIOS_COM_AUX, ( uint8_t * ) & gyro_data, sizeof( gyro_data ) ); result += PIOS_COM_SendBuffer( PIOS_COM_AUX, ( uint8_t * ) & Q, sizeof( float ) * NUMX * NUMX ); result += PIOS_COM_SendBuffer( PIOS_COM_AUX, ( uint8_t * ) & K, sizeof( float ) * NUMX * NUMV ); result += PIOS_COM_SendBuffer( PIOS_COM_AUX, ( uint8_t * ) & X, sizeof( float ) * NUMX * NUMX ); if( result == 0 ) PIOS_LED_Off( LED1 ); else { PIOS_LED_On( LED1 ); } #endif AttitudeActualSet( &attitude_actual ); /*FIXME: This is dangerous. There is no locking for UAVObjects so it could stomp all over the airspeed/climb rate etc. This used to be done in the OP module which was bad. Having ~4ms latency for the round trip makes it worse here. */ PositionActualData pos; PositionActualGet( &pos ); for( int ct = 0; ct < 3; ct++ ) { pos.NED[ct] = Nav.Pos[ct]; pos.Vel[ct] = Nav.Vel[ct]; } PositionActualSet( &pos ); static bool was_calibration = false; AhrsStatusData status; AhrsStatusGet( &status ); if( was_calibration != status.CalibrationSet ) { was_calibration = status.CalibrationSet; if( status.CalibrationSet ) { calibrate_sensors(); AhrsStatusGet( &status ); status.CalibrationSet = true; } } status.CPULoad = (( float )running_counts / ( float )( idle_counts + running_counts ) ) * 100; status.IdleTimePerCyle = idle_counts / ( TIMER_RATE / 10000 ); status.RunningTimePerCyle = running_counts / ( TIMER_RATE / 10000 ); status.DroppedUpdates = ekf_too_slow; AhrsStatusSet( &status ); } return 0; }
static int32_t updateAttitudeComplementary(bool first_run) { UAVObjEvent ev; GyrosData gyrosData; AccelsData accelsData; static int32_t timeval; float dT; static uint8_t init = 0; // Wait until the AttitudeRaw object is updated, if a timeout then go to failsafe if ( xQueueReceive(gyroQueue, &ev, FAILSAFE_TIMEOUT_MS / portTICK_RATE_MS) != pdTRUE || xQueueReceive(accelQueue, &ev, 1 / portTICK_RATE_MS) != pdTRUE ) { // When one of these is updated so should the other // Do not set attitude timeout warnings in simulation mode if (!AttitudeActualReadOnly()){ AlarmsSet(SYSTEMALARMS_ALARM_ATTITUDE,SYSTEMALARMS_ALARM_WARNING); return -1; } } AccelsGet(&accelsData); // During initialization and FlightStatusData flightStatus; FlightStatusGet(&flightStatus); if(first_run) { #if defined(PIOS_INCLUDE_HMC5883) // To initialize we need a valid mag reading if ( xQueueReceive(magQueue, &ev, 0 / portTICK_RATE_MS) != pdTRUE ) return -1; MagnetometerData magData; MagnetometerGet(&magData); #else MagnetometerData magData; magData.x = 100; magData.y = 0; magData.z = 0; #endif AttitudeActualData attitudeActual; AttitudeActualGet(&attitudeActual); init = 0; attitudeActual.Roll = atan2f(-accelsData.y, -accelsData.z) * 180.0f / F_PI; attitudeActual.Pitch = atan2f(accelsData.x, -accelsData.z) * 180.0f / F_PI; attitudeActual.Yaw = atan2f(-magData.y, magData.x) * 180.0f / F_PI; RPY2Quaternion(&attitudeActual.Roll,&attitudeActual.q1); AttitudeActualSet(&attitudeActual); timeval = PIOS_DELAY_GetRaw(); return 0; } if((init == 0 && xTaskGetTickCount() < 7000) && (xTaskGetTickCount() > 1000)) { // For first 7 seconds use accels to get gyro bias attitudeSettings.AccelKp = 1; attitudeSettings.AccelKi = 0.9; attitudeSettings.YawBiasRate = 0.23; magKp = 1; } else if ((attitudeSettings.ZeroDuringArming == ATTITUDESETTINGS_ZERODURINGARMING_TRUE) && (flightStatus.Armed == FLIGHTSTATUS_ARMED_ARMING)) { attitudeSettings.AccelKp = 1; attitudeSettings.AccelKi = 0.9; attitudeSettings.YawBiasRate = 0.23; magKp = 1; init = 0; } else if (init == 0) { // Reload settings (all the rates) AttitudeSettingsGet(&attitudeSettings); magKp = 0.01f; init = 1; } GyrosGet(&gyrosData); // Compute the dT using the cpu clock dT = PIOS_DELAY_DiffuS(timeval) / 1000000.0f; timeval = PIOS_DELAY_GetRaw(); float q[4]; AttitudeActualData attitudeActual; AttitudeActualGet(&attitudeActual); float grot[3]; float accel_err[3]; // Get the current attitude estimate quat_copy(&attitudeActual.q1, q); // Rotate gravity to body frame and cross with accels grot[0] = -(2 * (q[1] * q[3] - q[0] * q[2])); grot[1] = -(2 * (q[2] * q[3] + q[0] * q[1])); grot[2] = -(q[0] * q[0] - q[1]*q[1] - q[2]*q[2] + q[3]*q[3]); CrossProduct((const float *) &accelsData.x, (const float *) grot, accel_err); // Account for accel magnitude accel_mag = accelsData.x*accelsData.x + accelsData.y*accelsData.y + accelsData.z*accelsData.z; accel_mag = sqrtf(accel_mag); accel_err[0] /= accel_mag; accel_err[1] /= accel_mag; accel_err[2] /= accel_mag; if ( xQueueReceive(magQueue, &ev, 0) != pdTRUE ) { // Rotate gravity to body frame and cross with accels float brot[3]; float Rbe[3][3]; MagnetometerData mag; Quaternion2R(q, Rbe); MagnetometerGet(&mag); // If the mag is producing bad data don't use it (normally bad calibration) if (mag.x == mag.x && mag.y == mag.y && mag.z == mag.z) { rot_mult(Rbe, homeLocation.Be, brot); float mag_len = sqrtf(mag.x * mag.x + mag.y * mag.y + mag.z * mag.z); mag.x /= mag_len; mag.y /= mag_len; mag.z /= mag_len; float bmag = sqrtf(brot[0] * brot[0] + brot[1] * brot[1] + brot[2] * brot[2]); brot[0] /= bmag; brot[1] /= bmag; brot[2] /= bmag; // Only compute if neither vector is null if (bmag < 1 || mag_len < 1) mag_err[0] = mag_err[1] = mag_err[2] = 0; else CrossProduct((const float *) &mag.x, (const float *) brot, mag_err); } } else { mag_err[0] = mag_err[1] = mag_err[2] = 0; } // Accumulate integral of error. Scale here so that units are (deg/s) but Ki has units of s GyrosBiasData gyrosBias; GyrosBiasGet(&gyrosBias); gyrosBias.x -= accel_err[0] * attitudeSettings.AccelKi; gyrosBias.y -= accel_err[1] * attitudeSettings.AccelKi; gyrosBias.z -= mag_err[2] * magKi; GyrosBiasSet(&gyrosBias); // Correct rates based on error, integral component dealt with in updateSensors gyrosData.x += accel_err[0] * attitudeSettings.AccelKp / dT; gyrosData.y += accel_err[1] * attitudeSettings.AccelKp / dT; gyrosData.z += accel_err[2] * attitudeSettings.AccelKp / dT + mag_err[2] * magKp / dT; // Work out time derivative from INSAlgo writeup // Also accounts for the fact that gyros are in deg/s float qdot[4]; qdot[0] = (-q[1] * gyrosData.x - q[2] * gyrosData.y - q[3] * gyrosData.z) * dT * F_PI / 180 / 2; qdot[1] = (q[0] * gyrosData.x - q[3] * gyrosData.y + q[2] * gyrosData.z) * dT * F_PI / 180 / 2; qdot[2] = (q[3] * gyrosData.x + q[0] * gyrosData.y - q[1] * gyrosData.z) * dT * F_PI / 180 / 2; qdot[3] = (-q[2] * gyrosData.x + q[1] * gyrosData.y + q[0] * gyrosData.z) * dT * F_PI / 180 / 2; // Take a time step q[0] = q[0] + qdot[0]; q[1] = q[1] + qdot[1]; q[2] = q[2] + qdot[2]; q[3] = q[3] + qdot[3]; if(q[0] < 0) { q[0] = -q[0]; q[1] = -q[1]; q[2] = -q[2]; q[3] = -q[3]; } // Renomalize qmag = sqrtf(q[0]*q[0] + q[1]*q[1] + q[2]*q[2] + q[3]*q[3]); q[0] = q[0] / qmag; q[1] = q[1] / qmag; q[2] = q[2] / qmag; q[3] = q[3] / qmag; // If quaternion has become inappropriately short or is nan reinit. // THIS SHOULD NEVER ACTUALLY HAPPEN if((fabs(qmag) < 1.0e-3f) || (qmag != qmag)) { q[0] = 1; q[1] = 0; q[2] = 0; q[3] = 0; } quat_copy(q, &attitudeActual.q1); // Convert into eueler degrees (makes assumptions about RPY order) Quaternion2RPY(&attitudeActual.q1,&attitudeActual.Roll); AttitudeActualSet(&attitudeActual); // Flush these queues for avoid errors xQueueReceive(baroQueue, &ev, 0); if ( xQueueReceive(gpsQueue, &ev, 0) == pdTRUE && homeLocation.Set == HOMELOCATION_SET_TRUE ) { float NED[3]; // Transform the GPS position into NED coordinates GPSPositionData gpsPosition; GPSPositionGet(&gpsPosition); getNED(&gpsPosition, NED); PositionActualData positionActual; PositionActualGet(&positionActual); positionActual.North = NED[0]; positionActual.East = NED[1]; positionActual.Down = NED[2]; PositionActualSet(&positionActual); } if ( xQueueReceive(gpsVelQueue, &ev, 0) == pdTRUE ) { // Transform the GPS position into NED coordinates GPSVelocityData gpsVelocity; GPSVelocityGet(&gpsVelocity); VelocityActualData velocityActual; VelocityActualGet(&velocityActual); velocityActual.North = gpsVelocity.North; velocityActual.East = gpsVelocity.East; velocityActual.Down = gpsVelocity.Down; VelocityActualSet(&velocityActual); } AlarmsClear(SYSTEMALARMS_ALARM_ATTITUDE); return 0; }
/** * Telemetry transmit task. Processes queue events and periodic updates. */ static void telemetryRxTask(void *parameters) { uint32_t inputPort; uint8_t c; // Task loop while (1) { #if defined(PIOS_INCLUDE_USB_HID) // Determine input port (USB takes priority over telemetry port) if (PIOS_USB_HID_CheckAvailable(0)) { inputPort = PIOS_COM_TELEM_USB; } else #endif /* PIOS_INCLUDE_USB_HID */ { inputPort = telemetryPort; } mavlink_channel_t mavlink_chan = MAVLINK_COMM_0; // Block until a byte is available PIOS_COM_ReceiveBuffer(inputPort, &c, 1, portMAX_DELAY); // And process it if (mavlink_parse_char(mavlink_chan, c, &rx_msg, &rx_status)) { // Handle packet with waypoint component mavlink_wpm_message_handler(&rx_msg); // Handle packet with parameter component mavlink_pm_message_handler(mavlink_chan, &rx_msg); switch (rx_msg.msgid) { case MAVLINK_MSG_ID_HEARTBEAT: { // Check if this is the gcs mavlink_heartbeat_t beat; mavlink_msg_heartbeat_decode(&rx_msg, &beat); if (beat.type == MAV_TYPE_GCS) { // Got heartbeat from the GCS, we're good! lastOperatorHeartbeat = xTaskGetTickCount() * portTICK_RATE_MS; } } break; case MAVLINK_MSG_ID_SET_MODE: { mavlink_set_mode_t mode; mavlink_msg_set_mode_decode(&rx_msg, &mode); // Check if this system should change the mode if (mode.target_system == mavlink_system.sysid) { FlightStatusData flightStatus; FlightStatusGet(&flightStatus); switch (mode.base_mode) { case MAV_MODE_MANUAL_ARMED: { flightStatus.FlightMode = FLIGHTSTATUS_FLIGHTMODE_MANUAL; flightStatus.Armed = FLIGHTSTATUS_ARMED_ARMED; } break; case MAV_MODE_MANUAL_DISARMED: { flightStatus.FlightMode = FLIGHTSTATUS_FLIGHTMODE_MANUAL; flightStatus.Armed = FLIGHTSTATUS_ARMED_DISARMED; } break; case MAV_MODE_PREFLIGHT: { flightStatus.Armed = FLIGHTSTATUS_ARMED_DISARMED; } break; case MAV_MODE_STABILIZE_ARMED: { flightStatus.FlightMode = FLIGHTSTATUS_FLIGHTMODE_STABILIZED1; flightStatus.Armed = FLIGHTSTATUS_ARMED_ARMED; } break; case MAV_MODE_GUIDED_ARMED: { flightStatus.FlightMode = FLIGHTSTATUS_FLIGHTMODE_STABILIZED2; flightStatus.Armed = FLIGHTSTATUS_ARMED_ARMED; } break; case MAV_MODE_AUTO_ARMED: { flightStatus.FlightMode = FLIGHTSTATUS_FLIGHTMODE_STABILIZED3; flightStatus.Armed = FLIGHTSTATUS_ARMED_ARMED; } break; } bool newHilEnabled = (mode.base_mode & MAV_MODE_FLAG_DECODE_POSITION_HIL); if (newHilEnabled != hilEnabled) { if (newHilEnabled) { // READ-ONLY flag write to ActuatorCommand UAVObjMetadata meta; UAVObjHandle handle = ActuatorCommandHandle(); UAVObjGetMetadata(handle, &meta); meta.access = ACCESS_READONLY; UAVObjSetMetadata(handle, &meta); mavlink_missionlib_send_gcs_string("ENABLING HIL SIMULATION"); mavlink_missionlib_send_gcs_string("+++++++++++++++++++++++"); mavlink_missionlib_send_gcs_string("BLOCKING ALL ACTUATORS"); } else { // READ-ONLY flag write to ActuatorCommand UAVObjMetadata meta; UAVObjHandle handle = ActuatorCommandHandle(); UAVObjGetMetadata(handle, &meta); meta.access = ACCESS_READWRITE; UAVObjSetMetadata(handle, &meta); mavlink_missionlib_send_gcs_string("DISABLING HIL SIMULATION"); mavlink_missionlib_send_gcs_string("+++++++++++++++++++++++"); mavlink_missionlib_send_gcs_string("ACTIVATING ALL ACTUATORS"); } } hilEnabled = newHilEnabled; FlightStatusSet(&flightStatus); // Check HIL bool hilEnabled = (mode.base_mode & MAV_MODE_FLAG_DECODE_POSITION_HIL); enableHil(hilEnabled); } } break; case MAVLINK_MSG_ID_HIL_STATE: { if (hilEnabled) { mavlink_hil_state_t hil; mavlink_msg_hil_state_decode(&rx_msg, &hil); // Write GPSPosition GPSPositionData gps; GPSPositionGet(&gps); gps.Altitude = hil.alt/10; gps.Latitude = hil.lat/10; gps.Longitude = hil.lon/10; GPSPositionSet(&gps); // Write PositionActual PositionActualData pos; PositionActualGet(&pos); // FIXME WRITE POSITION HERE PositionActualSet(&pos); // Write AttitudeActual AttitudeActualData att; AttitudeActualGet(&att); att.Roll = hil.roll; att.Pitch = hil.pitch; att.Yaw = hil.yaw; // FIXME //att.RollSpeed = hil.rollspeed; //att.PitchSpeed = hil.pitchspeed; //att.YawSpeed = hil.yawspeed; // Convert to quaternion formulation RPY2Quaternion(&attitudeActual.Roll, &attitudeActual.q1); // Write AttitudeActual AttitudeActualSet(&att); // Write AttitudeRaw AttitudeRawData raw; AttitudeRawGet(&raw); raw.gyros[0] = hil.rollspeed; raw.gyros[1] = hil.pitchspeed; raw.gyros[2] = hil.yawspeed; raw.accels[0] = hil.xacc; raw.accels[1] = hil.yacc; raw.accels[2] = hil.zacc; // raw.magnetometers[0] = hil.xmag; // raw.magnetometers[0] = hil.ymag; // raw.magnetometers[0] = hil.zmag; AttitudeRawSet(&raw); } } break; case MAVLINK_MSG_ID_COMMAND_LONG: { // FIXME Implement } break; } } } }