Merged estimator fixes and mavlink rate config bits

ROMFS/px4fmu_common/init.d/rcS

@@ -428,11 +428,10 @@ then
 	#
 	sh /etc/init.d/rc.sensors
 
-	if [ $HIL == no ]
+	#
-	then
+	# Start logging in all modes, including HIL
-		echo "[init] Start logging"
+	#
-		sh /etc/init.d/rc.logging
+	sh /etc/init.d/rc.logging
-	fi
 
 	if [ $GPS == yes ]
 	then

src/drivers/mpu6000/mpu6000.cpp

@@ -544,7 +544,7 @@ void MPU6000::reset()
 	write_reg(MPUREG_USER_CTRL, BIT_I2C_IF_DIS);
         irqrestore(state);
 
-	up_udelay(1000);
+	usleep(1000);
 
 	// SAMPLE RATE
 	_set_sample_rate(_sample_rate);

src/modules/commander/commander.cpp

@@ -1591,7 +1591,6 @@ set_main_state_rc(struct vehicle_status_s *status, struct manual_control_setpoin
 	switch (sp_man->mode_switch) {
 	case SWITCH_POS_NONE:
 		res = TRANSITION_NOT_CHANGED;
-		warnx("NONE");
 		break;
 
 	case SWITCH_POS_OFF:		// MANUAL

src/modules/ekf_att_pos_estimator/estimator_21states.h

@@ -0,0 +1,247 @@
+#pragma once
+
+#include "estimator_utilities.h"
+
+class AttPosEKF {
+
+public:
+
+    AttPosEKF();
+    ~AttPosEKF();
+
+    /* ##############################################
+     *
+     *   M A I N    F I L T E R    P A R A M E T E R S
+     *
+     * ########################################### */
+
+    /*
+     * parameters are defined here and initialised in
+     * the InitialiseParameters() (which is just 20 lines down)
+     */
+
+    float covTimeStepMax; // maximum time allowed between covariance predictions
+    float covDelAngMax; // maximum delta angle between covariance predictions
+    float rngFinderPitch; // pitch angle of laser range finder in radians. Zero is aligned with the Z body axis. Positive is RH rotation about Y body axis.
+
+    float yawVarScale;
+    float windVelSigma;
+    float dAngBiasSigma;
+    float dVelBiasSigma;
+    float magEarthSigma;
+    float magBodySigma;
+    float gndHgtSigma;
+
+    float vneSigma;
+    float vdSigma;
+    float posNeSigma;
+    float posDSigma;
+    float magMeasurementSigma;
+    float airspeedMeasurementSigma;
+
+    float gyroProcessNoise;
+    float accelProcessNoise;
+
+    float EAS2TAS; // ratio f true to equivalent airspeed
+
+    void InitialiseParameters()
+    {
+        covTimeStepMax = 0.07f; // maximum time allowed between covariance predictions
+        covDelAngMax = 0.02f; // maximum delta angle between covariance predictions
+        rngFinderPitch = 0.0f; // pitch angle of laser range finder in radians. Zero is aligned with the Z body axis. Positive is RH rotation about Y body axis.
+        EAS2TAS = 1.0f;
+
+        yawVarScale = 1.0f;
+        windVelSigma = 0.1f;
+        dAngBiasSigma = 5.0e-7f;
+        dVelBiasSigma = 1e-4f;
+        magEarthSigma = 3.0e-4f;
+        magBodySigma  = 3.0e-4f;
+        gndHgtSigma  = 0.02f; // assume 2% terrain gradient 1-sigma
+
+        vneSigma = 0.2f;
+        vdSigma = 0.3f;
+        posNeSigma = 2.0f;
+        posDSigma = 2.0f;
+
+        magMeasurementSigma = 0.05;
+        airspeedMeasurementSigma = 1.4f;
+        gyroProcessNoise = 1.4544411e-2f;
+        accelProcessNoise = 0.5f;
+    }
+
+    // Global variables
+    float KH[n_states][n_states]; //  intermediate result used for covariance updates
+    float KHP[n_states][n_states]; // intermediate result used for covariance updates
+    float P[n_states][n_states]; // covariance matrix
+    float Kfusion[n_states]; // Kalman gains
+    float states[n_states]; // state matrix
+    float storedStates[n_states][data_buffer_size]; // state vectors stored for the last 50 time steps
+    uint32_t statetimeStamp[data_buffer_size]; // time stamp for each state vector stored
+
+    float statesAtVelTime[n_states]; // States at the effective measurement time for posNE and velNED measurements
+    float statesAtPosTime[n_states]; // States at the effective measurement time for posNE and velNED measurements
+    float statesAtHgtTime[n_states]; // States at the effective measurement time for the hgtMea measurement
+    float statesAtMagMeasTime[n_states]; // filter satates at the effective measurement time
+    float statesAtVtasMeasTime[n_states]; // filter states at the effective measurement time
+
+    Vector3f correctedDelAng; // delta angles about the xyz body axes corrected for errors (rad)
+    Vector3f correctedDelVel; // delta velocities along the XYZ body axes corrected for errors (m/s)
+    Vector3f summedDelAng; // summed delta angles about the xyz body axes corrected for errors (rad)
+    Vector3f summedDelVel; // summed delta velocities along the XYZ body axes corrected for errors (m/s)
+    float accNavMag; // magnitude of navigation accel (- used to adjust GPS obs variance (m/s^2)
+    Vector3f earthRateNED; // earths angular rate vector in NED (rad/s)
+    Vector3f angRate; // angular rate vector in XYZ body axes measured by the IMU (rad/s)
+    Vector3f accel; // acceleration vector in XYZ body axes measured by the IMU (m/s^2)
+    Vector3f dVelIMU;
+    Vector3f dAngIMU;
+    float dtIMU; // time lapsed since the last IMU measurement or covariance update (sec)
+    uint8_t fusionModeGPS; // 0 = GPS outputs 3D velocity, 1 = GPS outputs 2D velocity, 2 = GPS outputs no velocity
+    float innovVelPos[6]; // innovation output
+    float varInnovVelPos[6]; // innovation variance output
+
+    float velNED[3]; // North, East, Down velocity obs (m/s)
+    float posNE[2]; // North, East position obs (m)
+    float hgtMea; //  measured height (m)
+    float posNED[3]; // North, East Down position (m)
+
+    float innovMag[3]; // innovation output
+    float varInnovMag[3]; // innovation variance output
+    Vector3f magData; // magnetometer flux radings in X,Y,Z body axes
+    float innovVtas; // innovation output
+    float varInnovVtas; // innovation variance output
+    float VtasMeas; // true airspeed measurement (m/s)
+    float magDeclination;
+    float latRef; // WGS-84 latitude of reference point (rad)
+    float lonRef; // WGS-84 longitude of reference point (rad)
+    float hgtRef; // WGS-84 height of reference point (m)
+    Vector3f magBias; // states representing magnetometer bias vector in XYZ body axes
+    uint8_t covSkipCount; // Number of state prediction frames (IMU daya updates to skip before doing the covariance prediction
+
+    // GPS input data variables
+    float gpsCourse;
+    float gpsVelD;
+    float gpsLat;
+    float gpsLon;
+    float gpsHgt;
+    uint8_t GPSstatus;
+
+    // Baro input
+    float baroHgt;
+
+    bool statesInitialised;
+
+    bool fuseVelData; // this boolean causes the posNE and velNED obs to be fused
+    bool fusePosData; // this boolean causes the posNE and velNED obs to be fused
+    bool fuseHgtData; // this boolean causes the hgtMea obs to be fused
+    bool fuseMagData; // boolean true when magnetometer data is to be fused
+    bool fuseVtasData; // boolean true when airspeed data is to be fused
+
+    bool onGround;    ///< boolean true when the flight vehicle is on the ground (not flying)
+    bool staticMode;    ///< boolean true if no position feedback is fused
+    bool useAirspeed;    ///< boolean true if airspeed data is being used
+    bool useCompass;    ///< boolean true if magnetometer data is being used
+
+    struct ekf_status_report current_ekf_state;
+    struct ekf_status_report last_ekf_error;
+
+    bool numericalProtection;
+
+    unsigned storeIndex;
+
+
+void  UpdateStrapdownEquationsNED();
+
+void CovariancePrediction(float dt);
+
+void FuseVelposNED();
+
+void FuseMagnetometer();
+
+void FuseAirspeed();
+
+void zeroRows(float (&covMat)[n_states][n_states], uint8_t first, uint8_t last);
+
+void zeroCols(float (&covMat)[n_states][n_states], uint8_t first, uint8_t last);
+
+void quatNorm(float (&quatOut)[4], const float quatIn[4]);
+
+// store staes along with system time stamp in msces
+void StoreStates(uint64_t timestamp_ms);
+
+/**
+ * Recall the state vector.
+ *
+ * Recalls the vector stored at closest time to the one specified by msec
+ *
+ * @return zero on success, integer indicating the number of invalid states on failure.
+ *         Does only copy valid states, if the statesForFusion vector was initialized
+ *         correctly by the caller, the result can be safely used, but is a mixture
+ *         time-wise where valid states were updated and invalid remained at the old
+ *         value.
+ */
+int RecallStates(float statesForFusion[n_states], uint64_t msec);
+
+void ResetStoredStates();
+
+void quat2Tbn(Mat3f &Tbn, const float (&quat)[4]);
+
+void calcEarthRateNED(Vector3f &omega, float latitude);
+
+static void eul2quat(float (&quat)[4], const float (&eul)[3]);
+
+static void quat2eul(float (&eul)[3], const float (&quat)[4]);
+
+static void calcvelNED(float (&velNED)[3], float gpsCourse, float gpsGndSpd, float gpsVelD);
+
+static void calcposNED(float (&posNED)[3], float lat, float lon, float hgt, float latRef, float lonRef, float hgtRef);
+
+static void calcLLH(float (&posNED)[3], float lat, float lon, float hgt, float latRef, float lonRef, float hgtRef);
+
+static void quat2Tnb(Mat3f &Tnb, const float (&quat)[4]);
+
+static float sq(float valIn);
+
+void OnGroundCheck();
+
+void CovarianceInit();
+
+void InitialiseFilter(float (&initvelNED)[3], double referenceLat, double referenceLon, float referenceHgt, float declination);
+
+float ConstrainFloat(float val, float min, float max);
+
+void ConstrainVariances();
+
+void ConstrainStates();
+
+void ForceSymmetry();
+
+int CheckAndBound();
+
+void ResetPosition();
+
+void ResetVelocity();
+
+void ZeroVariables();
+
+void GetFilterState(struct ekf_status_report *state);
+
+void GetLastErrorState(struct ekf_status_report *last_error);
+
+bool StatesNaN(struct ekf_status_report *err_report);
+void FillErrorReport(struct ekf_status_report *err);
+
+void InitializeDynamic(float (&initvelNED)[3], float declination);
+
+protected:
+
+bool FilterHealthy();
+
+void ResetHeight(void);
+
+void AttitudeInit(float ax, float ay, float az, float mx, float my, float mz, float declination, float *initQuat);
+
+};
+
+uint32_t millis();
+

src/modules/ekf_att_pos_estimator/estimator_23states.h

@@ -1,76 +1,10 @@
-#include <math.h>
-#include <stdint.h>
-
 #pragma once
 
-#define GRAVITY_MSS 9.80665f
+#include "estimator_utilities.h"
-#define deg2rad 0.017453292f
-#define rad2deg 57.295780f
-#define pi 3.141592657f
-#define earthRate 0.000072921f
-#define earthRadius 6378145.0f
-#define earthRadiusInv  1.5678540e-7f
-
-class Vector3f
-{
-private:
-public:
-    float x;
-    float y;
-    float z;
-
-    float length(void) const;
-    void zero(void);
-};
-
-class Mat3f
-{
-private:
-public:
-    Vector3f x;
-    Vector3f y;
-    Vector3f z;
-
-    Mat3f();
-
-    void identity();
-    Mat3f transpose(void) const;
-};
-
-Vector3f operator*(float sclIn1, Vector3f vecIn1);
-Vector3f operator+( Vector3f vecIn1, Vector3f vecIn2);
-Vector3f operator-( Vector3f vecIn1, Vector3f vecIn2);
-Vector3f operator*( Mat3f matIn, Vector3f vecIn);
-Vector3f operator%( Vector3f vecIn1, Vector3f vecIn2);
-Vector3f operator*(Vector3f vecIn1, float sclIn1);
-
-void swap_var(float &d1, float &d2);
 
 const unsigned int n_states = 23;
 const unsigned int data_buffer_size = 50;
 
-enum GPS_FIX {
-    GPS_FIX_NOFIX = 0,
-    GPS_FIX_2D = 2,
-    GPS_FIX_3D = 3
-};
-
-struct ekf_status_report {
-    bool velHealth;
-    bool posHealth;
-    bool hgtHealth;
-    bool velTimeout;
-    bool posTimeout;
-    bool hgtTimeout;
-    uint32_t velFailTime;
-    uint32_t posFailTime;
-    uint32_t hgtFailTime;
-    float states[n_states];
-    bool statesNaN;
-    bool covarianceNaN;
-    bool kalmanGainsNaN;
-};
-
 class AttPosEKF {
 
 public:
@@ -141,7 +75,7 @@ public:
         accelProcessNoise = 0.5f;
     }
 
-    struct {
+    struct mag_state_struct {
         unsigned obsIndex;
         float MagPred[3];
         float SH_MAG[9];
@@ -157,7 +91,12 @@ public:
         float magZbias;
         float R_MAG;
         Mat3f DCM;
-    } magstate;
+    };
+
+    struct mag_state_struct magstate;
+    struct mag_state_struct resetMagState;
+
+
 
 
     // Global variables
@@ -166,6 +105,7 @@ public:
     float P[n_states][n_states]; // covariance matrix
     float Kfusion[n_states]; // Kalman gains
     float states[n_states]; // state matrix
+    float resetStates[n_states];
     float storedStates[n_states][data_buffer_size]; // state vectors stored for the last 50 time steps
     uint32_t statetimeStamp[data_buffer_size]; // time stamp for each state vector stored
 
@@ -183,6 +123,8 @@ public:
     float accNavMag; // magnitude of navigation accel (- used to adjust GPS obs variance (m/s^2)
     Vector3f earthRateNED; // earths angular rate vector in NED (rad/s)
     Vector3f angRate; // angular rate vector in XYZ body axes measured by the IMU (rad/s)
+    Vector3f lastGyroOffset;    // Last gyro offset
+    Vector3f delAngTotal;
 
     Mat3f Tbn; // transformation matrix from body to NED coordinates
     Mat3f Tnb; // transformation amtrix from NED to body coordinates
@@ -196,11 +138,11 @@ public:
     float varInnovVelPos[6]; // innovation variance output
 
     float velNED[3]; // North, East, Down velocity obs (m/s)
+    float accelGPSNED[3];   // Acceleration predicted by GPS in earth frame
     float posNE[2]; // North, East position obs (m)
     float hgtMea; //  measured height (m)
     float baroHgtOffset;        ///< the baro (weather) offset from normalized altitude
     float rngMea; // Ground distance
-    float posNED[3]; // North, East Down position (m)
 
     float innovMag[3]; // innovation output
     float varInnovMag[3]; // innovation variance output
@@ -243,6 +185,9 @@ public:
     bool useCompass;    ///< boolean true if magnetometer data is being used
     bool useRangeFinder;     ///< true when rangefinder is being used
 
+    bool ekfDiverged;
+    uint64_t lastReset;
+
     struct ekf_status_report current_ekf_state;
     struct ekf_status_report last_ekf_error;
 
@@ -299,9 +244,9 @@ static void quat2eul(float (&eul)[3], const float (&quat)[4]);
 
 static void calcvelNED(float (&velNED)[3], float gpsCourse, float gpsGndSpd, float gpsVelD);
 
-static void calcposNED(float (&posNED)[3], double lat, double lon, float hgt, double latRef, double lonRef, float hgtRef);
+void calcposNED(float (&posNED)[3], double lat, double lon, float hgt, double latRef, double lonRef, float hgtRef);
 
-static void calcLLH(float posNED[3], float &lat, float &lon, float &hgt, float latRef, float lonRef, float hgtRef);
+static void calcLLH(float posNED[3], double &lat, double &lon, float &hgt, double latRef, double lonRef, float hgtRef);
 
 static void quat2Tnb(Mat3f &Tnb, const float (&quat)[4]);
 
@@ -321,7 +266,7 @@ void ConstrainStates();
 
 void ForceSymmetry();
 
-int CheckAndBound();
+int CheckAndBound(struct ekf_status_report *last_error);
 
 void ResetPosition();
 
@@ -333,8 +278,7 @@ void GetFilterState(struct ekf_status_report *state);
 
 void GetLastErrorState(struct ekf_status_report *last_error);
 
-bool StatesNaN(struct ekf_status_report *err_report);
+bool StatesNaN();
-void FillErrorReport(struct ekf_status_report *err);
 
 void InitializeDynamic(float (&initvelNED)[3], float declination);
 
@@ -342,6 +286,10 @@ protected:
 
 bool FilterHealthy();
 
+bool GyroOffsetsDiverged();
+
+bool VelNEDDiverged();
+
 void ResetHeight(void);
 
 void AttitudeInit(float ax, float ay, float az, float mx, float my, float mz, float declination, float *initQuat);

src/modules/ekf_att_pos_estimator/estimator_utilities.cpp

@@ -0,0 +1,139 @@
+
+#include "estimator_utilities.h"
+
+// Define EKF_DEBUG here to enable the debug print calls
+// if the macro is not set, these will be completely
+// optimized out by the compiler.
+//#define EKF_DEBUG
+
+#ifdef EKF_DEBUG
+#include <stdio.h>
+
+static void
+ekf_debug_print(const char *fmt, va_list args)
+{
+    fprintf(stderr, "%s: ", "[ekf]");
+    vfprintf(stderr, fmt, args);
+
+    fprintf(stderr, "\n");
+}
+
+void
+ekf_debug(const char *fmt, ...)
+{
+    va_list args;
+
+    va_start(args, fmt);
+    ekf_debug_print(fmt, args);
+}
+
+#else
+
+void ekf_debug(const char *fmt, ...) { while(0){} }
+#endif
+
+float Vector3f::length(void) const
+{
+    return sqrt(x*x + y*y + z*z);
+}
+
+void Vector3f::zero(void)
+{
+    x = 0.0f;
+    y = 0.0f;
+    z = 0.0f;
+}
+
+Mat3f::Mat3f() {
+    identity();
+}
+
+void Mat3f::identity() {
+    x.x = 1.0f;
+    x.y = 0.0f;
+    x.z = 0.0f;
+
+    y.x = 0.0f;
+    y.y = 1.0f;
+    y.z = 0.0f;
+
+    z.x = 0.0f;
+    z.y = 0.0f;
+    z.z = 1.0f;
+}
+
+Mat3f Mat3f::transpose(void) const
+{
+    Mat3f ret = *this;
+    swap_var(ret.x.y, ret.y.x);
+    swap_var(ret.x.z, ret.z.x);
+    swap_var(ret.y.z, ret.z.y);
+    return ret;
+}
+
+// overload + operator to provide a vector addition
+Vector3f operator+( Vector3f vecIn1, Vector3f vecIn2)
+{
+    Vector3f vecOut;
+    vecOut.x = vecIn1.x + vecIn2.x;
+    vecOut.y = vecIn1.y + vecIn2.y;
+    vecOut.z = vecIn1.z + vecIn2.z;
+    return vecOut;
+}
+
+// overload - operator to provide a vector subtraction
+Vector3f operator-( Vector3f vecIn1, Vector3f vecIn2)
+{
+    Vector3f vecOut;
+    vecOut.x = vecIn1.x - vecIn2.x;
+    vecOut.y = vecIn1.y - vecIn2.y;
+    vecOut.z = vecIn1.z - vecIn2.z;
+    return vecOut;
+}
+
+// overload * operator to provide a matrix vector product
+Vector3f operator*( Mat3f matIn, Vector3f vecIn)
+{
+    Vector3f vecOut;
+    vecOut.x = matIn.x.x*vecIn.x + matIn.x.y*vecIn.y + matIn.x.z*vecIn.z;
+    vecOut.y = matIn.y.x*vecIn.x + matIn.y.y*vecIn.y + matIn.y.z*vecIn.z;
+    vecOut.z = matIn.x.x*vecIn.x + matIn.z.y*vecIn.y + matIn.z.z*vecIn.z;
+    return vecOut;
+}
+
+// overload % operator to provide a vector cross product
+Vector3f operator%( Vector3f vecIn1, Vector3f vecIn2)
+{
+    Vector3f vecOut;
+    vecOut.x = vecIn1.y*vecIn2.z - vecIn1.z*vecIn2.y;
+    vecOut.y = vecIn1.z*vecIn2.x - vecIn1.x*vecIn2.z;
+    vecOut.z = vecIn1.x*vecIn2.y - vecIn1.y*vecIn2.x;
+    return vecOut;
+}
+
+// overload * operator to provide a vector scaler product
+Vector3f operator*(Vector3f vecIn1, float sclIn1)
+{
+    Vector3f vecOut;
+    vecOut.x = vecIn1.x * sclIn1;
+    vecOut.y = vecIn1.y * sclIn1;
+    vecOut.z = vecIn1.z * sclIn1;
+    return vecOut;
+}
+
+// overload * operator to provide a vector scaler product
+Vector3f operator*(float sclIn1, Vector3f vecIn1)
+{
+    Vector3f vecOut;
+    vecOut.x = vecIn1.x * sclIn1;
+    vecOut.y = vecIn1.y * sclIn1;
+    vecOut.z = vecIn1.z * sclIn1;
+    return vecOut;
+}
+
+void swap_var(float &d1, float &d2)
+{
+    float tmp = d1;
+    d1 = d2;
+    d2 = tmp;
+}

src/modules/ekf_att_pos_estimator/estimator_utilities.h

@@ -0,0 +1,82 @@
+#include <math.h>
+#include <stdint.h>
+
+#pragma once
+
+#define GRAVITY_MSS 9.80665f
+#define deg2rad 0.017453292f
+#define rad2deg 57.295780f
+#define pi 3.141592657f
+#define earthRate 0.000072921f
+#define earthRadius 6378145.0
+#define earthRadiusInv  1.5678540e-7
+
+class Vector3f
+{
+private:
+public:
+    float x;
+    float y;
+    float z;
+
+    float length(void) const;
+    void zero(void);
+};
+
+class Mat3f
+{
+private:
+public:
+    Vector3f x;
+    Vector3f y;
+    Vector3f z;
+
+    Mat3f();
+
+    void identity();
+    Mat3f transpose(void) const;
+};
+
+Vector3f operator*(float sclIn1, Vector3f vecIn1);
+Vector3f operator+( Vector3f vecIn1, Vector3f vecIn2);
+Vector3f operator-( Vector3f vecIn1, Vector3f vecIn2);
+Vector3f operator*( Mat3f matIn, Vector3f vecIn);
+Vector3f operator%( Vector3f vecIn1, Vector3f vecIn2);
+Vector3f operator*(Vector3f vecIn1, float sclIn1);
+
+void swap_var(float &d1, float &d2);
+
+enum GPS_FIX {
+    GPS_FIX_NOFIX = 0,
+    GPS_FIX_2D = 2,
+    GPS_FIX_3D = 3
+};
+
+struct ekf_status_report {
+    bool error;
+    bool velHealth;
+    bool posHealth;
+    bool hgtHealth;
+    bool velTimeout;
+    bool posTimeout;
+    bool hgtTimeout;
+    bool imuTimeout;
+    uint32_t velFailTime;
+    uint32_t posFailTime;
+    uint32_t hgtFailTime;
+    float states[32];
+    unsigned n_states;
+    bool angNaN;
+    bool summedDelVelNaN;
+    bool KHNaN;
+    bool KHPNaN;
+    bool PNaN;
+    bool covarianceNaN;
+    bool kalmanGainsNaN;
+    bool statesNaN;
+    bool gyroOffsetsExcessive;
+    bool covariancesExcessive;
+    bool velOffsetExcessive;
+};
+
+void ekf_debug(const char *fmt, ...);

src/modules/ekf_att_pos_estimator/module.mk

@@ -39,4 +39,5 @@ MODULE_COMMAND	= ekf_att_pos_estimator
 
 SRCS		= ekf_att_pos_estimator_main.cpp \
 		  ekf_att_pos_estimator_params.c \
-		  estimator.cpp
+		  estimator_23states.cpp \
+		  estimator_utilities.cpp

src/modules/mavlink/mavlink_main.cpp

@@ -197,13 +197,14 @@ mavlink_send_uart_bytes(mavlink_channel_t channel, const uint8_t *ch, int length
 
 			if (buf_free < desired) {
 				/* we don't want to send anything just in half, so return */
+				instance->count_txerr();
 				return;
 			}
 		}
 
 		ssize_t ret = write(uart, ch, desired);
 		if (ret != desired) {
-			// XXX overflow perf
+			instance->count_txerr();
 		} else {
 			last_write_success_times[(unsigned)channel] = last_write_try_times[(unsigned)channel];
 		}
@@ -249,7 +250,8 @@ Mavlink::Mavlink() :
 	_param_use_hil_gps(0),
 
 /* performance counters */
-	_loop_perf(perf_alloc(PC_ELAPSED, "mavlink"))
+	_loop_perf(perf_alloc(PC_ELAPSED, "mavlink_el")),
+	_txerr_perf(perf_alloc(PC_COUNT, "mavlink_txe"))
 {
 	_wpm = &_wpm_s;
 	mission.count = 0;
@@ -302,6 +304,7 @@ Mavlink::Mavlink() :
 Mavlink::~Mavlink()
 {
 	perf_free(_loop_perf);
+	perf_free(_txerr_perf);
 
 	if (_task_running) {
 		/* task wakes up every 10ms or so at the longest */
@@ -326,6 +329,12 @@ Mavlink::~Mavlink()
 	LL_DELETE(_mavlink_instances, this);
 }
 
+void
+Mavlink::count_txerr()
+{
+	perf_count(_txerr_perf);
+}
+
 void
 Mavlink::set_mode(enum MAVLINK_MODE mode)
 {
@@ -2193,11 +2202,20 @@ int Mavlink::start_helper(int argc, char *argv[])
 	/* create the instance in task context */
 	Mavlink *instance = new Mavlink();
 
-	/* this will actually only return once MAVLink exits */
+	int res;
-	int res = instance->task_main(argc, argv);
 
-	/* delete instance on main thread end */
+	if (!instance) {
-	delete instance;
+
+		/* out of memory */
+		res = -ENOMEM;
+		warnx("OUT OF MEM");
+	} else {
+		/* this will actually only return once MAVLink exits */
+		res = instance->task_main(argc, argv);
+
+		/* delete instance on main thread end */
+		delete instance;
+	}
 
 	return res;
 }

src/modules/mavlink/mavlink_main.h

@@ -215,10 +215,14 @@ public:
 
 	const mavlink_channel_t	get_channel();
 
+	void configure_stream_threadsafe(const char *stream_name, const float rate);
+
 	bool			_task_should_exit;	/**< if true, mavlink task should exit */
 
 	int			get_mavlink_fd() { return _mavlink_fd; }
 
+	MavlinkStream * get_streams() { return _streams; } const
+
 
 	/* Functions for waiting to start transmission until message received. */
 	void			set_has_received_messages(bool received_messages) { _received_messages = received_messages; }
@@ -232,6 +236,11 @@ public:
     void lockMessageBufferMutex(void) { pthread_mutex_lock(&_message_buffer_mutex); }
     void unlockMessageBufferMutex(void) { pthread_mutex_unlock(&_message_buffer_mutex); }
 
+	/**
+	 * Count a transmision error
+	 */
+	void count_txerr();
+
 protected:
 	Mavlink			*next;
 
@@ -303,6 +312,7 @@ private:
 	pthread_mutex_t		_message_buffer_mutex;
 
 	perf_counter_t		_loop_perf;			/**< loop performance counter */
+	perf_counter_t		_txerr_perf;			/**< TX error counter */
 
 	bool			_param_initialized;
 	param_t			_param_system_id;
@@ -371,7 +381,6 @@ private:
 	int mavlink_open_uart(int baudrate, const char *uart_name, struct termios *uart_config_original, bool *is_usb);
 
 	int configure_stream(const char *stream_name, const float rate);
-	void configure_stream_threadsafe(const char *stream_name, const float rate);
 
 	int message_buffer_init(int size);
 

src/modules/mavlink/mavlink_messages.cpp

@@ -232,6 +232,11 @@ public:
 		return "HEARTBEAT";
 	}
 
+	uint8_t get_id()
+	{
+		return MAVLINK_MSG_ID_HEARTBEAT;
+	}
+
 	static MavlinkStream *new_instance()
 	{
 		return new MavlinkStreamHeartbeat();
@@ -292,6 +297,11 @@ public:
 		return "SYS_STATUS";
 	}
 
+	uint8_t get_id()
+	{
+		return MAVLINK_MSG_ID_SYS_STATUS;
+	}
+
 	static MavlinkStream *new_instance()
 	{
 		return new MavlinkStreamSysStatus();
@@ -343,6 +353,11 @@ public:
 		return "HIGHRES_IMU";
 	}
 
+	uint8_t get_id()
+	{
+		return MAVLINK_MSG_ID_HIGHRES_IMU;
+	}
+
 	static MavlinkStream *new_instance()
 	{
 		return new MavlinkStreamHighresIMU();
@@ -428,6 +443,11 @@ public:
 		return "ATTITUDE";
 	}
 
+	uint8_t get_id()
+	{
+		return MAVLINK_MSG_ID_ATTITUDE;
+	}
+
 	static MavlinkStream *new_instance()
 	{
 		return new MavlinkStreamAttitude();
@@ -474,6 +494,11 @@ public:
 		return "ATTITUDE_QUATERNION";
 	}
 
+	uint8_t get_id()
+	{
+		return MAVLINK_MSG_ID_ATTITUDE_QUATERNION;
+	}
+
 	static MavlinkStream *new_instance()
 	{
 		return new MavlinkStreamAttitudeQuaternion();
@@ -526,6 +551,11 @@ public:
 		return "VFR_HUD";
 	}
 
+	uint8_t get_id()
+	{
+		return MAVLINK_MSG_ID_VFR_HUD;
+	}
+
 	static MavlinkStream *new_instance()
 	{
 		return new MavlinkStreamVFRHUD();
@@ -609,6 +639,11 @@ public:
 		return "GPS_RAW_INT";
 	}
 
+	uint8_t get_id()
+	{
+		return MAVLINK_MSG_ID_GPS_RAW_INT;
+	}
+
 	static MavlinkStream *new_instance()
 	{
 		return new MavlinkStreamGPSRawInt();
@@ -662,6 +697,11 @@ public:
 		return "GLOBAL_POSITION_INT";
 	}
 
+	uint8_t get_id()
+	{
+		return MAVLINK_MSG_ID_GLOBAL_POSITION_INT;
+	}
+
 	static MavlinkStream *new_instance()
 	{
 		return new MavlinkStreamGlobalPositionInt();
@@ -723,6 +763,11 @@ public:
 		return "LOCAL_POSITION_NED";
 	}
 
+	uint8_t get_id()
+	{
+		return MAVLINK_MSG_ID_LOCAL_POSITION_NED;
+	}
+
 	static MavlinkStream *new_instance()
 	{
 		return new MavlinkStreamLocalPositionNED();
@@ -774,6 +819,11 @@ public:
 		return "VICON_POSITION_ESTIMATE";
 	}
 
+	uint8_t get_id()
+	{
+		return MAVLINK_MSG_ID_VICON_POSITION_ESTIMATE;
+	}
+
 	static MavlinkStream *new_instance()
 	{
 		return new MavlinkStreamViconPositionEstimate();
@@ -824,6 +874,11 @@ public:
 		return "GPS_GLOBAL_ORIGIN";
 	}
 
+	uint8_t get_id()
+	{
+		return MAVLINK_MSG_ID_GPS_GLOBAL_ORIGIN;
+	}
+
 	static MavlinkStream *new_instance()
 	{
 		return new MavlinkStreamGPSGlobalOrigin();
@@ -864,6 +919,11 @@ public:
 		return MavlinkStreamServoOutputRaw<N>::get_name_static();
 	}
 
+	uint8_t get_id()
+	{
+		return MAVLINK_MSG_ID_SERVO_OUTPUT_RAW;
+	}
+
 	static const char *get_name_static()
 	{
 		switch (N) {
@@ -941,6 +1001,11 @@ public:
 		return "HIL_CONTROLS";
 	}
 
+	uint8_t get_id()
+	{
+		return MAVLINK_MSG_ID_HIL_CONTROLS;
+	}
+
 	static MavlinkStream *new_instance()
 	{
 		return new MavlinkStreamHILControls();
@@ -1078,6 +1143,11 @@ public:
 		return "GLOBAL_POSITION_SETPOINT_INT";
 	}
 
+	uint8_t get_id()
+	{
+		return MAVLINK_MSG_ID_GLOBAL_POSITION_SETPOINT_INT;
+	}
+
 	static MavlinkStream *new_instance()
 	{
 		return new MavlinkStreamGlobalPositionSetpointInt();
@@ -1121,6 +1191,11 @@ public:
 		return "LOCAL_POSITION_SETPOINT";
 	}
 
+	uint8_t get_id()
+	{
+		return MAVLINK_MSG_ID_LOCAL_POSITION_SETPOINT;
+	}
+
 	static MavlinkStream *new_instance()
 	{
 		return new MavlinkStreamLocalPositionSetpoint();
@@ -1169,6 +1244,11 @@ public:
 		return "ROLL_PITCH_YAW_THRUST_SETPOINT";
 	}
 
+	uint8_t get_id()
+	{
+		return MAVLINK_MSG_ID_ROLL_PITCH_YAW_THRUST_SETPOINT;
+	}
+
 	static MavlinkStream *new_instance()
 	{
 		return new MavlinkStreamRollPitchYawThrustSetpoint();
@@ -1217,6 +1297,11 @@ public:
 		return "ROLL_PITCH_YAW_RATES_THRUST_SETPOINT";
 	}
 
+	uint8_t get_id()
+	{
+		return MAVLINK_MSG_ID_ROLL_PITCH_YAW_RATES_THRUST_SETPOINT;
+	}
+
 	static MavlinkStream *new_instance()
 	{
 		return new MavlinkStreamRollPitchYawRatesThrustSetpoint();
@@ -1265,6 +1350,11 @@ public:
 		return "RC_CHANNELS_RAW";
 	}
 
+	uint8_t get_id()
+	{
+		return MAVLINK_MSG_ID_RC_CHANNELS_RAW;
+	}
+
 	static MavlinkStream *new_instance()
 	{
 		return new MavlinkStreamRCChannelsRaw();
@@ -1349,6 +1439,11 @@ public:
 		return "MANUAL_CONTROL";
 	}
 
+	uint8_t get_id()
+	{
+		return MAVLINK_MSG_ID_MANUAL_CONTROL;
+	}
+
 	static MavlinkStream *new_instance()
 	{
 		return new MavlinkStreamManualControl();
@@ -1398,6 +1493,11 @@ public:
 		return "OPTICAL_FLOW";
 	}
 
+	uint8_t get_id()
+	{
+		return MAVLINK_MSG_ID_OPTICAL_FLOW;
+	}
+
 	static MavlinkStream *new_instance()
 	{
 		return new MavlinkStreamOpticalFlow();
@@ -1446,6 +1546,11 @@ public:
 		return "ATTITUDE_CONTROLS";
 	}
 
+	uint8_t get_id()
+	{
+		return 0;
+	}
+
 	static MavlinkStream *new_instance()
 	{
 		return new MavlinkStreamAttitudeControls();
@@ -1504,6 +1609,11 @@ public:
 		return "NAMED_VALUE_FLOAT";
 	}
 
+	uint8_t get_id()
+	{
+		return MAVLINK_MSG_ID_NAMED_VALUE_FLOAT;
+	}
+
 	static MavlinkStream *new_instance()
 	{
 		return new MavlinkStreamNamedValueFloat();
@@ -1552,6 +1662,11 @@ public:
 		return "CAMERA_CAPTURE";
 	}
 
+	uint8_t get_id()
+	{
+		return 0;
+	}
+
 	static MavlinkStream *new_instance()
 	{
 		return new MavlinkStreamCameraCapture();
@@ -1597,6 +1712,11 @@ public:
 		return "DISTANCE_SENSOR";
 	}
 
+	uint8_t get_id()
+	{
+		return MAVLINK_MSG_ID_DISTANCE_SENSOR;
+	}
+
 	static MavlinkStream *new_instance()
 	{
 		return new MavlinkStreamDistanceSensor();

src/modules/mavlink/mavlink_receiver.cpp

@@ -159,6 +159,10 @@ MavlinkReceiver::handle_message(mavlink_message_t *msg)
 		handle_message_heartbeat(msg);
 		break;
 
+	case MAVLINK_MSG_ID_REQUEST_DATA_STREAM:
+		handle_message_request_data_stream(msg);
+		break;
+
 	case MAVLINK_MSG_ID_ENCAPSULATED_DATA:
 		MavlinkFTP::getServer()->handle_message(_mavlink, msg);
 		break;
@@ -498,6 +502,24 @@ MavlinkReceiver::handle_message_heartbeat(mavlink_message_t *msg)
 	}
 }
 
+void
+MavlinkReceiver::handle_message_request_data_stream(mavlink_message_t *msg)
+{
+	mavlink_request_data_stream_t req;
+	mavlink_msg_request_data_stream_decode(msg, &req);
+
+	if (req.target_system == mavlink_system.sysid && req.target_component == mavlink_system.compid) {
+		float rate = req.start_stop ? (1000.0f / req.req_message_rate) : 0.0f;
+
+		MavlinkStream *stream;
+		LL_FOREACH(_mavlink->get_streams(), stream) {
+			if (req.req_stream_id == stream->get_id()) {
+				_mavlink->configure_stream_threadsafe(stream->get_name(), rate);
+			}
+		}
+	}
+}
+
 void
 MavlinkReceiver::handle_message_hil_sensor(mavlink_message_t *msg)
 {

src/modules/mavlink/mavlink_receiver.h

@@ -115,6 +115,7 @@ private:
 	void handle_message_radio_status(mavlink_message_t *msg);
 	void handle_message_manual_control(mavlink_message_t *msg);
 	void handle_message_heartbeat(mavlink_message_t *msg);
+	void handle_message_request_data_stream(mavlink_message_t *msg);
 	void handle_message_hil_sensor(mavlink_message_t *msg);
 	void handle_message_hil_gps(mavlink_message_t *msg);
 	void handle_message_hil_state_quaternion(mavlink_message_t *msg);

src/modules/mavlink/mavlink_stream.h

@@ -67,6 +67,7 @@ public:
 	static const char *get_name_static();
 	virtual void subscribe(Mavlink *mavlink) = 0;
 	virtual const char *get_name() const = 0;
+	virtual uint8_t get_id() = 0;
 
 protected:
 	mavlink_channel_t _channel;

src/modules/sdlog2/sdlog2.c

@@ -976,7 +976,8 @@ int sdlog2_thread_main(int argc, char *argv[])
 			struct log_BATT_s log_BATT;
 			struct log_DIST_s log_DIST;
 			struct log_TELE_s log_TELE;
-			struct log_ESTM_s log_ESTM;
+			struct log_EST0_s log_EST0;
+			struct log_EST1_s log_EST1;
 			struct log_PWR_s log_PWR;
 			struct log_VICN_s log_VICN;
 			struct log_GS0A_s log_GS0A;
@@ -1489,15 +1490,21 @@ int sdlog2_thread_main(int argc, char *argv[])
 
 		/* --- ESTIMATOR STATUS --- */
 		if (copy_if_updated(ORB_ID(estimator_status), subs.estimator_status_sub, &buf.estimator_status)) {
-			log_msg.msg_type = LOG_ESTM_MSG;
+			log_msg.msg_type = LOG_EST0_MSG;
-			unsigned maxcopy = (sizeof(buf.estimator_status.states) < sizeof(log_msg.body.log_ESTM.s)) ? sizeof(buf.estimator_status.states) : sizeof(log_msg.body.log_ESTM.s);
+			unsigned maxcopy0 = (sizeof(buf.estimator_status.states) < sizeof(log_msg.body.log_EST0.s)) ? sizeof(buf.estimator_status.states) : sizeof(log_msg.body.log_EST0.s);
-			memset(&(log_msg.body.log_ESTM.s), 0, sizeof(log_msg.body.log_ESTM.s));
+			memset(&(log_msg.body.log_EST0.s), 0, sizeof(log_msg.body.log_EST0.s));
-			memcpy(&(log_msg.body.log_ESTM.s), buf.estimator_status.states, maxcopy);
+			memcpy(&(log_msg.body.log_EST0.s), buf.estimator_status.states, maxcopy0);
-			log_msg.body.log_ESTM.n_states = buf.estimator_status.n_states;
+			log_msg.body.log_EST0.n_states = buf.estimator_status.n_states;
-			log_msg.body.log_ESTM.states_nan = buf.estimator_status.states_nan;
+			log_msg.body.log_EST0.nan_flags = buf.estimator_status.nan_flags;
-			log_msg.body.log_ESTM.covariance_nan = buf.estimator_status.covariance_nan;
+			log_msg.body.log_EST0.health_flags = buf.estimator_status.health_flags;
-			log_msg.body.log_ESTM.kalman_gain_nan = buf.estimator_status.kalman_gain_nan;
+			log_msg.body.log_EST0.timeout_flags = buf.estimator_status.timeout_flags;
-			LOGBUFFER_WRITE_AND_COUNT(ESTM);
+			LOGBUFFER_WRITE_AND_COUNT(EST0);
+
+			log_msg.msg_type = LOG_EST1_MSG;
+			unsigned maxcopy1 = ((sizeof(buf.estimator_status.states) - maxcopy0) < sizeof(log_msg.body.log_EST1.s)) ? (sizeof(buf.estimator_status.states) - maxcopy0) : sizeof(log_msg.body.log_EST1.s);
+			memset(&(log_msg.body.log_EST1.s), 0, sizeof(log_msg.body.log_EST1.s));
+			memcpy(&(log_msg.body.log_EST1.s), buf.estimator_status.states + maxcopy0, maxcopy1);
+			LOGBUFFER_WRITE_AND_COUNT(EST1);
 		}
 
 		/* --- TECS STATUS --- */

src/modules/sdlog2/sdlog2_messages.h

@@ -288,15 +288,7 @@ struct log_TELE_s {
 	uint8_t txbuf;
 };
 
-/* --- ESTM - ESTIMATOR STATUS --- */
+// ID 23 available
-#define LOG_ESTM_MSG 23
-struct log_ESTM_s {
-	float s[10];
-	uint8_t n_states;
-	uint8_t states_nan;
-	uint8_t covariance_nan;
-	uint8_t kalman_gain_nan;
-};
 
 /* --- PWR - ONBOARD POWER SYSTEM --- */
 #define LOG_PWR_MSG 24
@@ -377,6 +369,22 @@ struct log_WIND_s {
 	float cov_y;
 };
 
+/* --- EST0 - ESTIMATOR STATUS --- */
+#define LOG_EST0_MSG 32
+struct log_EST0_s {
+	float s[12];
+	uint8_t n_states;
+	uint8_t nan_flags;
+	uint8_t health_flags;
+	uint8_t timeout_flags;
+};
+
+/* --- EST1 - ESTIMATOR STATUS --- */
+#define LOG_EST1_MSG 33
+struct log_EST1_s {
+	float s[16];
+};
+
 /********** SYSTEM MESSAGES, ID > 0x80 **********/
 
 /* --- TIME - TIME STAMP --- */
@@ -425,7 +433,8 @@ static const struct log_format_s log_formats[] = {
 	LOG_FORMAT(BATT, "ffff",		"V,VFilt,C,Discharged"),
 	LOG_FORMAT(DIST, "ffB",			"Bottom,BottomRate,Flags"),
 	LOG_FORMAT(TELE, "BBBBHHB",		"RSSI,RemRSSI,Noise,RemNoise,RXErr,Fixed,TXBuf"),
-	LOG_FORMAT(ESTM, "ffffffffffBBBB",	"s0,s1,s2,s3,s4,s5,s6,s7,s8,s9,nStat,statNaN,covNaN,kGainNaN"),
+	LOG_FORMAT(EST0, "ffffffffffffBBBB",	"s0,s1,s2,s3,s4,s5,s6,s7,s8,s9,s10,s11,nStat,fNaN,fHealth,fTOut"),
+	LOG_FORMAT(EST1, "ffffffffffffffff",	"s12,s13,s14,s15,s16,s17,s18,s19,s20,s21,s22,s23,s24,s25,s26,s27"),
 	LOG_FORMAT(PWR, "fffBBBBB",		"Periph5V,Servo5V,RSSI,UsbOk,BrickOk,ServoOk,PeriphOC,HipwrOC"),
 	LOG_FORMAT(VICN, "ffffff",		"X,Y,Z,Roll,Pitch,Yaw"),
 	LOG_FORMAT(GS0A, "BBBBBBBBBBBBBBBB",	"s0,s1,s2,s3,s4,s5,s6,s7,s8,s9,s10,s11,s12,s13,s14,s15"),

src/modules/uORB/topics/estimator_status.h

@@ -64,9 +64,9 @@ struct estimator_status_report {
 	uint64_t timestamp;			/**< Timestamp in microseconds since boot */
 	float states[32];			/**< Internal filter states */
 	float n_states;				/**< Number of states effectively used */
-	bool states_nan;			/**< If set to true, one of the states is NaN */
+	uint8_t nan_flags;			/**< Bitmask to indicate NaN states */
-	bool covariance_nan;			/**< If set to true, the covariance matrix went NaN */
+	uint8_t health_flags;			/**< Bitmask to indicate sensor health states (vel, pos, hgt) */
-	bool kalman_gain_nan;			/**< If set to true, the Kalman gain matrix went NaN */
+	uint8_t timeout_flags;			/**< Bitmask to indicate timeout flags (vel, pos, hgt) */
 
 };