dagar

#! /bin/bash

# assumes /dev/sdb is sd card

# make sure it's not mounted
sudo udisksctl unmount --block-device /dev/sdb

sudo time badblocks -svw -t random /dev/sdb
sudo time f3probe --destructive --time-ops /dev/sdb
sudo parted --script /dev/sdb mklabel msdos

dagar

-- Wireshark dissector for the MAVLink protocol (please see http://qgroundcontrol.org/mavlink/start for details) 

mavlink_proto = Proto("mavlink_proto", "MAVLink protocol")
f = mavlink_proto.fields

payload_fns = {}

messageName = {
    [0] = 'HEARTBEAT',
    [1] = 'SYS_STATUS',

dagar

dagar@dagar-desktop ~/git/Firmware
 % ./Tools/docker_run.sh 'make posix_sitl_default'
guessing PX4_DOCKER_REPO based on input
PX4_DOCKER_REPO: px4io/px4-dev-nuttx:2017-10-23
Starting with UID : 1000
-- Build Type: RelWithDebInfo
-- PX4 VERSION: v1.7.2-17-g370da89
-- CONFIG: posix_sitl_default
-- Build Type: RelWithDebInfo
-- The CXX compiler identification is GNU 5.4.0

dagar

---
Language:        Cpp
# BasedOnStyle:  Google
AccessModifierOffset: -1
AlignAfterOpenBracket: Align
AlignConsecutiveAssignments: false
AlignConsecutiveDeclarations: false
AlignEscapedNewlinesLeft: true
AlignOperands:   true
AlignTrailingComments: true

dagar

#! /usr/bin/env python

"""
This is a simple helper for running pixhawk onboard unit tests.

The script returns 0 if the tests successfully pass, or -1 otherwise.
"""

from __future__ import print_function

dagar

>>> Executing mission
>>> Takeoff to 10.0 meters above home
Waiting for vehicle to arm...
INFO  [commander] home: 47.3977421, 8.5455937, 488.01
INFO  [tone_alarm] positive
INFO  [commander] home: 47.3977421, 8.5455937, 488.01
INFO  [tone_alarm] arming
>>> ARMED by arm/disarm component command
INFO  [commander] Takeoff detected
>>> Takeoff detected

dagar

#! /usr/bin/env python

"""
This is a simple helper for running pixhawk onboard unit tests.

The script returns 0 if the tests successfully pass, or -1 otherwise.
"""

from __future__ import print_function

dagar

[ROSTEST]-----------------------------------------------------------------------

[px4.rosunit-mission_test_new_1/test_mission][FAILURE]--------------------------
(vtol_new_1.txt) took too long to get to position lat: 47.397732, lon: 8.543269, alt: 500.126000, xy off: 5.000000, z off: 5.000000, timeout: 600, index: 0, pos_d: 174.935106, alt_d: 12.026000
  File "/usr/lib/python2.7/unittest/case.py", line 331, in run
    testMethod()
  File "/job/catkin/src/px4/integrationtests/python_src/px4_it/mavros/mission_test.py", line 275, in test_mission
    self.reach_position(waypoint.x_lat, waypoint.y_long, alt, 600, index)
  File "/job/catkin/src/px4/integrationtests/python_src/px4_it/mavros/mission_test.py", line 174, in reach_position
    (self.mission_name, lat, lon, alt, xy_radius, z_radius, timeout, index, self.last_pos_d, self.last_alt_d)))

dagar

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

dagar

QML debugging is enabled. Only use this in a safe environment.
QML debugging is enabled. Only use this in a safe environment.
Settings location "/home/dagar/.config/QGroundControl.org/QGroundControl.ini" Is writable?: true
Settings location "/home/dagar/.config/QGroundControl.org/QGroundControl.ini" Is writable?: true
Filter rules "qt.network.ssl.warning=false\n*Log.debug=false\nRadioComponentControllerLog.debug=true\n"
Filter rules "qt.network.ssl.warning=false\n*Log.debug=false\nRadioComponentControllerLog.debug=true\n"
Map Cache in: "/home/dagar/.cache/QGCMapCache100" / "qgcMapCache.db"
Map Cache in: "/home/dagar/.cache/QGCMapCache100" / "qgcMapCache.db"
VideoReceiver::start() failed. Error with gst_element_factory_make('h264parse')
VideoReceiver::start() failed. Error with gst_element_factory_make('h264parse')