initial comit, ported scout_sdk and added hunter support

docs/misc/beaglebone_black_can_cape.md

@@ -0,0 +1,23 @@
+# Setup CAN on Beaglebone Black
+
+CAN/RS485 Cape: https://item.taobao.com/item.htm?spm=a1z09.2.0.0.68b02e8d02l2uT&id=42637485181&_u=a4mg52ma183
+
+* Install latest Debian image from offical site
+* Build and install overlays
+```
+$ sudo apt install device-tree-compiler
+$ git clone https://github.com/beagleboard/bb.org-overlays
+$ cd ./bb.org-overlays/
+$ ./install.sh
+```
+* Edit /boot/uEnv.txt
+```
+# 1. Add the following overlay
+###Custom Cape
+dtb_overlay=/lib/firmware/BB-CAN1-00A0.dtbo
+
+# 2. Disable auto loading of virutal capes (uncomment the two lines)
+disable_uboot_overlay_video=1
+disable_uboot_overlay_audio=1
+```
+* Reboot the system

docs/misc/beaglebone_ros_install.md

@@ -0,0 +1,51 @@
+```
+$ sudo sh -c 'echo "deb http://packages.ros.org/ros/ubuntu stretch main" > /etc/apt/sources.list.d/ros-latest.list'
+$ wget https://raw.githubusercontent.com/ros/rosdistro/master/ros.key  -O - | sudo apt-key add -
+$ sudo apt-get update
+```
+
+```
+$ sudo apt-get install -y python-pip python-setuptools python-yaml python-distribute python-docutils python-dateutil python-six
+$ sudo pip install rosdep rosinstall_generator wstool rosinstall
+$ sudo apt-get install -y \
+     libconsole-bridge-dev liblz4-dev checkinstall cmake \
+     python-empy python-nose libbz2-dev \
+     libboost-test-dev libboost-dev  libboost-program-options-dev \
+     libboost-regex-dev libboost-signals-dev \
+     libtinyxml-dev libboost-filesystem-dev libxml2-dev \
+     libgtest-dev libpoco-dev
+```
+
+```
+$ sudo rosdep init
+$ rosdep update
+```
+
+```
+$ rosinstall_generator ros_comm --rosdistro melodic --deps --tar > melodic-ros_comm.rosinstall
+$ wstool init -j1 src melodic-ros_comm.rosinstall
+```
+
+```
+$ # rosdep install --from-paths src --ignore-src --rosdistro melodic -y
+$ sudo ./src/catkin/bin/catkin_make_isolated --install --install-space /opt/ros/melodic -DCMAKE_BUILD_TYPE=Release
+```
+
+```
+$ source /opt/ros/melodic/setup.bash
+```
+
+Additional runtime dependencies:
+
+```
+$ sudo apt install -y python-defusedxml python-netifaces
+```
+
+```
+$ sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys F42ED6FBAB17C654
+```
+
+Reference:
+
+* [1] https://machinekoder.com/ros-with-debian-stretch-on-the-beaglebone-black-green-blue/
+* [2] http://wiki.ros.org/melodic/Installation/Source

docs/misc/check_endianness.md

@@ -0,0 +1,36 @@
+On a Big Endian-System (Solaris on SPARC)
+
+```
+$ echo -n I | od -to2 | head -n1 | cut -f2 -d" " | cut -c6 
+0
+```
+On a little endian system (Linux on x86)
+```
+$ echo -n I | od -to2 | head -n1 | cut -f2 -d" " | cut -c6 
+1
+```
+The solution above is clever and works great for Linux *86 and Solaris Sparc.
+
+I needed a shell-only (no Perl) solution that also worked on AIX/Power and HPUX/Itanium. Unfortunately the last two don't play nice: AIX reports "6" and HPUX gives an empty line.
+
+Using your solution, I was able to craft something that worked on all these Unix systems:
+```
+$ echo I | tr -d [:space:] | od -to2 | head -n1 | awk '{print $2}' | cut -c6
+```
+Regarding the Python solution someone posted, it does not work in Jython because the JVM treats everything as Big. If anyone can get it to work in Jython, please post!
+
+Also, I found this, which explains the endianness of various platforms. Some hardware can operate in either mode depending on what the O/S selects: http://labs.hoffmanlabs.com/node/544
+
+If you're going to use awk this line can be simplified to:
+```
+echo -n I | od -to2 | awk '{ print substr($2,6,1); exit}'
+```
+For small Linux boxes that don't have 'od' (say OpenWrt) then try 'hexdump':
+```
+echo -n I | hexdump -o | awk '{ print substr($2,6,1); exit}'
+```
+
+Reference: 
+
+* [1] https://serverfault.com/questions/163487/how-to-tell-if-a-linux-system-is-big-endian-or-little-endian
+* [2] https://wiki.rdu.im/_pages/Knowledge-Base/Computing/Computing.html

docs/misc/commands.md

@@ -0,0 +1,55 @@
+# Commands
+
+## Create gif animation using "imagemagick"
+
+```
+$ convert -delay 120 -loop 0 *.png animated.gif
+```
+
+## Get statistics of the code base
+
+```
+$ sudo apt install cloc
+$ cd ~/Workspace/librav/src
+$ cloc --exclude-dir=cmake,lcmtypes,third_party .
+```
+
+## Create a pair of VSP’s
+
+```
+$ socat -d -d pty,raw,echo=0 pty,raw,echo=0
+```
+
+```
+$ cat nmea_test.txt > /dev/pts/6
+```
+
+## git subtree
+
+Adding the sub-project as a remote
+```
+$ git remote add -f [remote-name] [remote-url]
+$ git subtree add --prefix [sub-project-name] [remote-name] [branch-name] --squash
+```
+
+Update the sub-project
+```
+$ git fetch [remote-name] [branch-name] 
+$ git subtree pull --prefix [sub-project-name] [remote-name] [branch-name] --squash
+```
+
+Push to remote
+```
+$ git subtree push --prefix=[sub-project-name] [remote-name] [branch-name] 
+```
+
+Firmware branch update
+```
+$ git fetch fw_origin pios_pixcar
+$ git subtree pull --prefix firmware fw_origin pios_pixcar --squash
+```
+
+## Reference
+
+* [Git subtree: the alternative to Git submodule](https://www.atlassian.com/blog/git/alternatives-to-git-submodule-git-subtree)
+* [Virtual serial port: socat](https://justcheckingonall.wordpress.com/2009/06/09/howto-vsp-socat/)

docs/misc/jetson_tx2_can.md

@@ -0,0 +1,12 @@
+# Enable CAN on Jetson TX2
+
+```
+$ sudo modprobe can
+$ sudo modprobe mttcan
+$ sudo ip link set can0 type can bitrate 500000
+$ sudo ip link set up can0
+```
+
+Reference:
+
+* https://devtalk.nvidia.com/default/topic/1006762/jetson-tx2/how-can-i-use-can-bus-in-tx2-/post/5166583/#5166583

docs/misc/release_checklist.md

@@ -0,0 +1 @@
+* Disable tests to keep minimal dependency by default

docs/misc/test_can_msg.txt

@@ -0,0 +1,7 @@
+  can1  131   [8]  00 00 00 00 00 00 E4 1E
+  can1  141   [8]  00 00 00 02 0E 00 E3 3D
+  can1  151   [8]  01 00 00 EF 00 3C E5 6B
+  can1  200   [8]  00 00 00 00 00 00 EA F4
+  can1  201   [8]  00 00 00 00 00 00 EA F5
+  can1  202   [8]  00 00 00 00 00 00 EA F6
+  can1  203   [8]  00 00 00 00 00 00 EA F7