Mathews2115/auto-dash.md

## auto-dash.md

      
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              auto-dash.md
            
          
    Quick How-To Raspberry Pi 3 Dashboard setup.
(WIP) - will be updating this more once I complete this project.
WHAT THIS DOESN'T HAVE

Code that listens and parses CAN messages.  (Though I do use this and it is amazing)

Quick Hardware Review

Gauge Cluter/Dashboard
A raspberry pi will listen for CANBUS messages and whatever program you use (or make) will reactive to those messages.
I used Two apps:

backend Node.js app that listens to CAN messages (and sends info to a front end via websockets)
front Chromium web app that displays your information. (you can use whatever you want though)


Powered by car's 12v (using DC-DC converter)
Everything auto-starts on power up
Everything saves and closes on power down

My Parts List (yours may vary)

Raspberry Pi 3
PiCAN2
Heatsinks - (keep that CPU cooler)
7" Raspberry Pi Touchscreen Display
DC-DC converter (12v input to 5v usb) - Use this to power your Pi in the car
Powerblock for safe power on and power off

Initial Pi setup
Folow what I have below but also feel free to give this a quick look too: heavily inspired by this
Get the OS image installed

Download and RASPBIAN STRETCH LITE onto your micro SD card.

Initial Configuration
(configure the pi) in the console:

sudo raspi-config
Go to Change User Password and CHANGE LOGIN PASSWORD
Go to Network Options: setup wifi if needed; you want to update your firmware, drivers, software, etc.
Go to Boot Options --> B1: Desktop / CLI: console - Auto login  (So when it powers up, it automatically logs in.  You can turn this off later after development if needed)
Go to Boot Options --> B2: Wait for Network Boot: NO (dont wait for it - it will boot faster but may take a bit before you can actively do a apt-get or ssh action )
Go to Interface Options --> SSH: YES    (makes it so you can log into your Pi through your wifi)
Go to Advance Options --> memory split: 256
(anything else you want, you can always come back)
FINISH

Make sure to update everything before proceeding

sudo apt-get -y update && sudo apt-get -y upgrade ; sudo apt-get autoremove
sudo reboot

Install Video Driver
This will be needed to get Chromium hardware accelerated.

Install drivers: sudo apt-get install libgl1-mesa-dri
Then enable the the driver: sudo raspi-config
Advance Options --> A7: GL Driver --> G2 (FAKE KMS)
This will allow chromium to hardware accelerate stuff...(but more on that later)
Reboot: sudo reboot

Setup for required GUI stuff
Chromium and the thing that will "host" chromium

sudo apt-get install --no-install-recommends xserver-xorg x11-xserver-utils xinit openbox
sudo apt-get install --no-install-recommends chromium-browser

Configure xserver / Chromium
openbox is now installed; let's make it so our window's manager starts up chromium (auto start stuff comes later)

sudo nano /etc/xdg/openbox/autostart

# Disable any form of screen saver / screen blanking / power management
xset s off
xset s noblank
xset -dpms

# Allow quitting the X server with CTRL-ATL-Backspace
setxkbmap -option terminate:ctrl_alt_bksp

# Start Chromium in kiosk mode
sed -i 's/"exited_cleanly":false/"exited_cleanly":true/' ~/.config/chromium/'Local State'
sed -i 's/"exited_cleanly":false/"exited_cleanly":true/; s/"exit_type":"[^"]\+"/"exit_type":"Normal"/' ~/.config/chromium/Default/Preferences
chromium-browser --kiosk --disable-overscroll-edge-effect --disable-sync --disable-suggestions-ui --disable-signin-promo  --mmal-frame-copy --mmal-frame-buffers=4 --ignore-gpu-blacklist --enable-native-gpu-memory-buffers --start-maximized --disable-infobars 'http://your-url-here'


Above - we eliminate basically ALL of the tool bars, notifications etc.
We also enable a bunch of crap so we can get "accelerated" canvas, etc
Later - when we get our web server running, http://your-url-here will be replaced with our actual url.
To start chromium now: type  startx -- -nocursor
To quit chromium/x server - hit Ctrl-Alt-Backspace

Auto Start Chromium

sudo nano /home/pi/.bash_profile

[[ -z $DISPLAY && $XDG_VTNR -eq 1 ]] && startx -- -nocursor

PLAYING WITH CAN
Installing needed drivers

sudo apt-get -y install can-utils libsocketcan2 libsocketcan-dev

Setting up PiCAN2
PiCAN2 Device Overlays (enable CAN device)

Enable SPI either through raspi-config or add dtparam=spi=on to /boot/config.txt
put the following in: /boot/config.txt

#CAN bus controllers
dtoverlay=mcp2515-can0,oscillator=16000000,interrupt=25
dtoverlay=spi-bcm2835-overlay

auto-start CAN interface on bootup

sudo nano /etc/network/interfaces
Paste this into there

auto can0
iface can0 inet manual
   pre-up /sbin/ip link set can0 type can bitrate 500000 triple-sampling on
   up /sbin/ifconfig can0 up
   down /sbin/ifconfig can0 down

helpful links:

Raspberry Pi & CAN-bus
Stack Exchange
Node-CAN NodeJS library that is ready to rumble for CAN messages

Powerblock
5v power from your DC-DC will go directly to this!  You're ignition 5v switch/signal with go to the Powerblock's signal jumper.

Install their driver. That's it.

Install NodeJs

For the most current, navigate to Install Node.js on Raspberry Pi


curl -sL https://deb.nodesource.com/setup_8.x | sudo -E bash -
sudo apt-get install -y nodejs

MAKE A BACKUP
Now that we have installed most of the required OS stuff....LET'S MAKE A BACKUP!
Whenever you make successful changes to your OS, always backup your SD image just in case you corrupt your SD card's file system.  (like if you shutdown incorrectly, or install something crappy, or screwup a boot config...etc etc etc)

READ THIS PAGE
From your mac: sudo dd bs=4m if=/dev/rdisk2 of=someCoolBackupName.img