rapid prototyping with open source software and hardware

8/6/2019 Rapid Prototyping with Open Source Software and Hardware

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Rapid Embedded Prototyping with Open Source:Software and Hardware

Alison ChaikenNokia Mobility Solutions

Sunnyvale [email protected]

July 12, 2011

Principles:

Reuse components, both own and COTS, HW and SWModular, flexible designUnit testing at regular preplanned intervals
mailto:[email protected]:[email protected]


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Open Source Platform Features to Consider

Compatible CPU architectures Vendor support, documentation and maintenance and

license Ported applications, app store Toolchain (compiler, debugger, package manager) Software development kit and integrated dev.

environment Real-time performance


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Popular Embedded Operating Systems


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MeyerSound's D-Mitri

EmDebian runs real-time audio for Cirque du Soleil, Disney.


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Embedded Linux or alternative?

Have MMU? Soft real-time OK? GPLv2 OK?

ExistingLinux port?

Tools,support

OK?

Power useOK?

Want Linuxfeatures?

Driver availability?


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MeeGo Linaro Android ngstrom

Organization Foundation Non-profit Consortium Community

Membership None Core, Club,Community

Unclear None

Planning/gover-nanceprocess

Open on IRC +private

Board, TSGs inprivate

Private Come again?

License LGPL Upstreams' Apache v2 Upstreams'

Corporateparticipants

16 : Intel, TI,Nokia?, AMD,Fujitsu,Renesas

ARM,Freescale, IBM,Samsung, STEricsson, TI

over 80, esp.Mentor inembedded

None

Supportedarchitectures Atom (x86),ARMv7, MIPS inprogress

ARMv7: CortexA8, A9, & A15 ARMv7, ARMv5,PowerPC, x86,MIPS

ARM, PowerPC,MIPS, SuperH,AVR

Shippingproducts

WeTab,IndaMixx,Amino, Geely,HawTai

Not yet legion Gumstix


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Cross-Platform Apps on Mobile POSIX

Plus, port of iOS apps to MeeGo led by Intel'sS. Crabtree with LLVM developers in Argentina!

Debian's Iced Robot

RIM's AndroidPlayer on QNXMyriad's Alien Dalvk on Maemo


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Qt Includes Beautiful UI, Featureful Back-endQt Mobility: extensive support for location-based services

Excellent IDE, easy and rapid prototyping with Javascript-like QML.


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Qt Runs Everywhere

Deeply embedded (bare metal) or headless all the way to desktop.


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MeeGo is more like Desktop Linux than Android


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MeeGo Special Sauce Qt application framework and GUI toolkit Connman connection manager Simplified Mandatory Access Control Kernel

(Smack) Intended to be reconfigured and reskinned: an

upstream Easier to port mainline Linux components to

MeeGo than to Android


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connman Connection Manager


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Surprisingly strong developer support

Reflects big efforts by Intel and MeeGo vendor community.


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MeeGo Problems Security and synchronization systems left

dangling due to project changes Lack of continuity and predictability

GTK Qt Debian package manager to RedHat one Nokia exit

Netbook and handset now unsupported, TV andtablet added 5th place (?) in handset/tablet space

Do deeply embedded OEMs care?


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Nokia

MeeGoCommunity


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HW Development Platform Requirements

Versatility: support for different buses, commsand display protocols

Expandability: ports, headers and daughter cards

Software platform support Documentation: manuals, gerbers Device drivers!


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Notable ARM Dev Boards in use by aMeeGos

TI BeagleBoard XMx1 Cortex A8 with SGX530 GPU

ST-Ericsson Snowballx2 Cortex A9 with Mali GPU

TI Pandaboardx2 Cortex A9 with SGX540 GPU


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Other Prototyping possibilities

Intel N450 Mini-ITXx1 Atom, integrated graphics

Gumstix Overox1 Cortex A8 with SGX530 GPU

Variscite AM35x1 Cortex A8 600 MHz, CAN busFreescale iMX53 QuickStart

x1 Cortex A8 1 GHz, SATA


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http://elinux.org/images/5/5c/ELC-AlwaysInnovating-Gentil.pdf

Gentil's Demo at ELC2011


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Lessons from the Trenches

chroot approach demonstrated by Gentil is fast,powerful and widely applicable

Pick popular HW platform for accessories, docsand tools Device driver situation is painful no matter what

selection is made


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Summary Wide selection, decent tools and good docs

enable rapid prototyping using open source. Embedded Linux is useful inmany cases. Where app store is irrelevant, MeeGo is

easier than Android. Starting with ARM or Atom reference board

saves a lot of headaches. Linaro and Yocto projects are promising. Proprietary device drivers are the biggest

problem on any platform.


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MeeGo IVI Running on ExoPC


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MeeGo-IVI Homescreen on Atom ExoPC Slate


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Linux Security for Embedded Environments

Sandboxing and cgroups Hardware approach like DRM GPU decoding SELinux versus Smack Java approach:

don't prevent impermissible actions in policy; insteadintentionally omit the facility for implementation of them

Nothing like airgap security at the end of the day


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ConnMan Architecture overview


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TI's OMAP4430 SoC

6 cores: 2x Cortex A-9, SGX540 GPU, C64X DSP plus 2x Cortex-M


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MeeGo-IVI On OMAP4 Pandaboard withHW-accelerated Graphics


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Yocto Project Eases Custom Linux Builds

Based on Open Embedded, with better UI and more quality control

Source for board-support packages and device drivers,evenproprietary and binary ones, where available

Complete toolchain including revision control,compilation,packaging and testing

Support for many architectures and software variants Broad industrial support


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Linaro: improving Linux on ARM

Industry contributions for ARM to Linux kernelare a mess

Tools lag x86 Broad industrial support can enable code reuse

and encourage best practices Primarily funded by Canonical and IBM Still early in development

rapid prototyping with open source software and hardware

Documents