px4-firmware/ROMFS/logging/logconv.m

clear all
close all

%%%%%%%%%%%%%%%%%%%%%%%
% SYSTEM VECTOR
%
% 			All measurements in NED frame
% 			
% 			uint64_t timestamp;
% 			float gyro[3]; in rad/s
% 			float accel[3]; in m/s^2
% 			float mag[3]; in Gauss
% 			float baro; pressure in millibar
% 			float baro_alt; altitude above MSL in meters
% 			float baro_temp; in degrees celcius
% 			float control[4]; roll, pitch, yaw [-1..1], thrust [0..1]
% 			float actuators[8]; motor 1-8, in motor units (PWM: 1000-2000,
% 			AR.Drone: 0-512
% 			float vbat; battery voltage in volt
% 			float adc[3]; remaining auxiliary ADC ports in volt
%           float local_position
%           int32 gps_raw_position


if exist('sysvector.bin', 'file')
    % Read actuators file
    myFile = java.io.File('sysvector.bin')
    fileSize = length(myFile)

    fid = fopen('sysvector.bin', 'r');
    elements = int64(fileSize./(8+(3+3+3+1+1+1+4+8+4+3+3)*4));

    for i=1:elements
        % timestamp
        sysvector(i,1) = double(fread(fid, 1, '*uint64', 0, 'ieee-le.l64'));
        % actuators 1-16
        % quadrotor: motor 1-4 on the first four positions
        sysvector(i, 2:32) = fread(fid,  28+3, 'float', 'ieee-le');
        sysvector(i,33:35) = fread(fid, 3, 'int32', 'ieee-le');
    end
    
    sysvector_interval_seconds = (sysvector(end,1) - sysvector(1:1)) / 1000000
    sysvector_minutes = sysvector_interval_seconds / 60
    
    % Normalize time
    sysvector(:,1) = (sysvector(:,1) - sysvector(1,1)) / 1000000;
    
    % Create some basic plots
    
    % Remove zero rows from GPS
    gps = sysvector(:,33:35);
    gps(~any(gps,2), :) = [];
    
    all_data = figure('Name', 'GPS RAW');
    gps_position = plot3(gps(:,1), gps(:,2), gps(:,3));
    
    
    all_data = figure('Name', 'Complete Log Data (exc. GPS)');
    plot(sysvector(:,1), sysvector(:,2:32));
    
    actuator_inputs = figure('Name', 'Attitude controller outputs');
    plot(sysvector(:,1), sysvector(:,14:17));
    legend('roll motor setpoint', 'pitch motor setpoint', 'yaw motor setpoint', 'throttle motor setpoint');
    
    actuator_outputs = figure('Name', 'Actuator outputs');
    plot(sysvector(:,1), sysvector(:,18:25));
    legend('actuator 0', 'actuator 1', 'actuator 2', 'actuator 3', 'actuator 4', 'actuator 5', 'actuator 6', 'actuator 7');
    
end

if exist('actuator_outputs0.bin', 'file')
    % Read actuators file
    myFile = java.io.File('actuator_outputs0.bin')
    fileSize = length(myFile)

    fid = fopen('actuator_outputs0.bin', 'r');
    elements = int64(fileSize./(16*4+8))

    for i=1:elements
        % timestamp
        actuators(i,1) = double(fread(fid, 1, '*uint64', 0, 'ieee-le.l64'));
        % actuators 1-16
        % quadrotor: motor 1-4 on the first four positions
        actuators(i, 2:17) = fread(fid,  16, 'float', 'ieee-le');
    end
end

if exist('actuator_controls0.bin', 'file')
    % Read actuators file
    myFile = java.io.File('actuator_controls0.bin')
    fileSize = length(myFile)

    fid = fopen('actuator_controls0.bin', 'r');
    elements = int64(fileSize./(8*4+8))

    for i=1:elements
        % timestamp
        actuator_controls(i,1) = fread(fid, 1, 'uint64', 0, 'ieee-le.l64');
        % actuators 1-16
        % quadrotor: motor 1-4 on the first four positions
        actuator_controls(i, 2:9) = fread(fid,  8, 'float', 'ieee-le');
    end
end


if exist('sensor_combined.bin', 'file')
    % Read sensor combined file
    % Type definition: Firmware/apps/uORB/topics/sensor_combined.h
    % Struct: sensor_combined_s
    fileInfo = dir('sensor_combined.bin');
    fileSize = fileInfo.bytes;

    fid = fopen('sensor_combined.bin', 'r');

    for i=1:elements
        % timestamp
        sensors(i,1) = double(fread(fid, 1, '*uint64', 0, 'ieee-le.l64'));
        % gyro raw
        sensors(i,2:4) = fread(fid, 3, 'int16', 0, 'ieee-le');
        % gyro counter
        sensors(i,5) = fread(fid, 1, 'uint16', 0, 'ieee-le');
        % gyro in rad/s
        sensors(i,6:8) = fread(fid, 3, 'float', 0, 'ieee-le');

        % accelerometer raw
        sensors(i,9:11) = fread(fid, 3, 'int16', 0, 'ieee-le');
        % padding bytes
        fread(fid, 1, 'int16', 0, 'ieee-le');
        % accelerometer counter
        sensors(i,12) = fread(fid, 1, 'uint32', 0, 'ieee-le');
        % accel in m/s2
        sensors(i,13:15) = fread(fid, 3, 'float', 0, 'ieee-le');
        % accel mode
        sensors(i,16) = fread(fid, 1, 'int32', 0, 'ieee-le');
        % accel range
        sensors(i,17) = fread(fid, 1, 'float', 0, 'ieee-le');

        % mag raw
        sensors(i,18:20) = fread(fid, 3, 'int16', 0, 'ieee-le');
        % padding bytes
        fread(fid, 1, 'int16', 0, 'ieee-le');
        % mag in Gauss
        sensors(i,21:23) = fread(fid, 3, 'float', 0, 'ieee-le');
        % mag mode
        sensors(i,24) = fread(fid, 1, 'int32', 0, 'ieee-le');
        % mag range
        sensors(i,25) = fread(fid, 1, 'float', 0, 'ieee-le');
        % mag cuttoff freq
        sensors(i,26) = fread(fid, 1, 'float', 0, 'ieee-le');
        % mag counter
        sensors(i,27) = fread(fid, 1, 'int32', 0, 'ieee-le');

        % baro pressure millibar
        % baro alt meter
        % baro temp celcius
        % battery voltage
        % adc voltage (3 channels)
        sensors(i,28:34) = fread(fid, 7, 'float', 0, 'ieee-le');
        % baro counter and battery counter
        sensors(i,35:36) = fread(fid, 2, 'uint32', 0, 'ieee-le');
        % battery voltage valid flag
        sensors(i,37) = fread(fid, 1, 'uint32', 0, 'ieee-le');

    end
end