ILUG-D Talk - July 1st 2018

1. Using ‘LINUX’ in commercial Products

2. @iAyanPahwa/iayanpahwa
‣ Embedded Software Engineer by Profession.
‣ FPV Drone pilot by Passion.
‣ Maker and Content creator by choice…
‣ Blog: https://codeNsolder.com
KNOW THE PRESENTER

3. @iAyanPahwa/iayanpahwa
WHY LINUX
‣ Free and Open Source
‣Excellent Portability
‣Customisable
‣Community Backed
‣Friendly Licensed

4. @iAyanPahwa/iayanpahwa
OPTIONS
BARE METAL RTOS LINUX
‣ Code Flashed directly on the
chip
‣ Suited for single threaded
applications
‣ Real time
‣ Less processing power
‣ Need to write individual drivers
and optimise hence more skills
needed.
‣ Highly Real Time
‣ Suited for single threaded
time critical applications
‣ Light Weight
‣ API system calls
architecture
‣ Handles basic OS stuffs
itself
‣ Not Real Time
‣ Suited for multi threaded
applications
‣ Supports high level
applications and
networking out of the box
‣ Device Drivers
‣ Handles all the OS stuffs
itself

5. @iAyanPahwa/iayanpahwa
OTHER OPTIONS
?

6. @iAyanPahwa/iayanpahwa
PRODUCTS

7. @iAyanPahwa/iayanpahwa
PRODUCTS

8. @iAyanPahwa/iayanpahwa
PRODUCTS
‣ In-Vehicle-Infotainment(IVI) systems
> Audio > GPS > UI
> Video > Diagnosis
> MirrorLink / Apple CarPlay / Android Auto support

9. @iAyanPahwa/iayanpahwa
PRODUCTS
‣ Advance Driver Assistance System (ADAS)
> Camera > SONAR
> Rain Sensors > Door Sensors
> Light Sensors

10. @iAyanPahwa/iayanpahwa
PRODUCTS
‣ Delhi Metro Displays
> Audio > RTC > Network
> LED Dot Matrix Display

11. @iAyanPahwa/iayanpahwa
PRODUCTS
‣ Smart Internet connected clock
> Audio > RTC > Network
> OLED Display > MicroPhone

12. @iAyanPahwa/iayanpahwa
PRODUCTS
‣ Security Cameras / Baby Monitors
> Audio > Video
> Control - Pan/Tilt > Network

13. @iAyanPahwa/iayanpahwa
PRODUCTS
‣ Drones
> Motors > Navigation
> APAS systems (Sensors)
> Gimbal Control - 3axis

14. @iAyanPahwa/iayanpahwa
PRODUCTS
‣ Self Driving Car
> ADAS + > LiDar
> GPU processing
> Smart charging capabilities

15. @iAyanPahwa/iayanpahwa
PRODUCTS
‣ Rifles
> IMU
> LASER Guide
> Barometer

16. @iAyanPahwa/iayanpahwa
LINUX SUBSYSTEMS
‣ Audio
‣ Video
‣ Camera
‣ UI
‣ RTC
‣ Network
‣ Ethernet
‣ WiFi
‣ Bluetooth
‣ CAN
COMPONENT SYSTEM Applications
‣ ALSA / i2s / asound.conf
‣ v4L2
‣ UVC / CSI / USB Video Class
‣ Xserver / DRM
‣ RTC
‣ Networking subsystem
‣ DBUS
‣ Gstreamer, PulseAudio. Alsa-utils
‣ Gstreamer
‣ MPEG streamer
‣ GTK / MESA / QT
‣ date
‣ net-tools, iptables, /etc/networking/interfaces
‣ WPA Supplicant, Connman
‣ BLUEZ
‣ can-utils

17. @iAyanPahwa/iayanpahwa
LINUX SUBSYSTEMS
COMPONENT SYSTEM Applications
‣ UART
‣ /dev/tty.*
‣ Sensors
‣ GPS
‣ SONAR
‣ LiDAR
‣ Mic
‣ IMU
‣ GPIO
‣ i2C
‣ GPIO
‣ i2C / SPI
‣ SysFS /sys
‣ i2c / SMBUS
‣ SysFS /sys
‣ i2c / SPI dev

18. @iAyanPahwa/iayanpahwa
CUSTOMISING LINUX

19. @iAyanPahwa/iayanpahwa
WHY CUSTOMISE
‣ Add what you need
‣ Security
‣ Easy maintenance
‣ Shorter build time
‣ Storage
‣ Boot Time Optimisation
‣ Real time capabilities

20. @iAyanPahwa/iayanpahwa
EMBEDDED LINUX
KERNELDTB RootFSBootloader initramfs

21. @iAyanPahwa/iayanpahwa
1. CHOOSE AN SOC

22. @iAyanPahwa/iayanpahwa
FORK

23. @iAyanPahwa/iayanpahwa
BOARD SUPPORT PACKAGE (BSP)
‣ BootLoader ( u-boot)
‣ DTS / DTB
‣ Kernel
‣ Flash utility
‣ Hardware Security:
‣ OPTEE
‣ Signed Firmware
‣ CryptoModule

24. @iAyanPahwa/iayanpahwa
‣ Cross Compiler
‣ Binutils
‣ glib / uglibc / eglibc / must
‣ Debugger
TOOLCHAIN

25. @iAyanPahwa/iayanpahwa
BUILD SYSTEM
‣Makefile
‣OpenWRT / LEDE
‣BuildRoot
‣Yocto

26. @iAyanPahwa
BUILD SYSTEM
INSTALL
FETCH
UNPACK
PATCH
CONFIGURE
COMPILE
PACKAGE

27. @iAyanPahwa
BUILD SYSTEM : YOCTO
‣ Open Source
‣ 6 months release cycle
‣ Cross Platform
‣ Build Native tools
‣ Toolchain
‣ Packaging
‣ High Redundancy
‣ Multiple level of Parallelism
‣ Application Development
‣ GUI

28. @iAyanPahwa/iayanpahwa
BUILD SYSTEM : YOCTO
INSTALL
FETCH
UNPACK
PATCH
CONFIGURE
COMPILE
SYSROOTS
PACKAGE
‣ Pre-Mirrors(Internal SFTP)
‣ Hosting(SourceForge)
‣ Git
‣ Hash matching(md5sum / sha256)
‣ tarballs
‣ zip
‣ Compiler Flags / Env
‣ Redundancy
‣ .ipk / .deb / .rpm

31. POKY = OPENEMBEDDED + BITBAKE

32. LAYERS

33. BITBAKING RECIPES

34. BITBAKING CONF
‣local.conf
‣layer.conf
‣bblayers.conf
PARALLELISM:
BB_NUMBER_THREADS ? = “1.5 x No of cores”
PARALLEL_MAKE ?= “-j 2 x No of cores”

35. GETTING STARTED
Github Gist —> https://goo.gl/RWhmNU

36. @iAyanPahwa/iayanpahwa
DEMO

37. REFERENCES
https://www.yoctoproject.org/docs/1.8/yocto-project-qs/yocto-project-qs.html

38. @iAyanPahwa
/iayanpahwa
https://codeNsolder.com
THANK YOU