evaluation of ecos embedded

8/6/2019 Evaluation of eCos Embedded

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d ip lom a t h es i s

Evaluation of eCos embedded

Real Time Operating System


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eCos e m b ed de d Co nf ig ur ab le o pe ra t i ng s ys t e m

Free Open Source runtime systemSupported by GNU Open Source development toolsReleased under GPL-compatible free softwarelicenseHighly configurable and scaleableGraphical component configuration toolsetReal Time performance


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eCos or ig ins

Cygnus SolutionsFounded 1987- Michael Tieman- David Henkel-Wallace- John Gilmore

Provide high qualitiy support and development forOpen Source softwareGNUPro ToolKit


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eCos or ig ins

1996 Cygnus starts eCos project1998 eCos 1.1 release (first public release)1999 Red Hat acquire Cygnus Solutions2000 eCos 1.3.1 released under Red Hat eCosPublic License2000 Red Hat announce the availability of Redboot

2002 eCos 2.0-alpha released under GPL+exception2002 original members of eCos team formeCosCentric Limited in Cambridge


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eCos or ig ins

2002 Red Hat announce their withdrawal from RTOSmarket, lays off entire eCos team2003 eCos 2.0-final release2003 eCosCentric announces eCosPro DevelopersKit2004 Red Hat announce intention to assigncopyright of the portions of the original source baseto FSF


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eCos d es ig n g oa ls

Unite function range of many RTOS solutionsAbstract hardware detailsHighly configurable and scaleableSmall resource footprintKeep up with commercial solutions

Provide Real Time performance


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eCos a r c h i t e c t u r e

Monolitic Kernel

Configurable component architecture

Reusable key software components


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eCos a r c h i t e c t u r e


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eCos t a rg e t s a r c h i t e c t u r e

Piece of hardware on which the application will beexecuted

Component framework loads Packages to supportthe devices and HAL relevant to the target

Configuration options are changed from theirdefault values to settings appropriate to the target


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eCos t e m p l a t e s a r c h i t e c t u r e

Partial configuration that gives a valid starting point

Combination of a hardware target and a group ofpackages


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eCos HAL c o re c o m ponent s

Isolates architectural-dependent features andpresents them in general form to allow portability ofother infrastructure components

Key Component for HW Ports

Software Layer with generalized API


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eCos HAL c o re c o m ponent s

Implemented Core Features:

-Interrupts

- Exceptions- Virtual Vectors- HAL Start up- Device drivers API


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eCos K e r n e l c o re c o m ponent s

Threads APIRich set of synchronisation primitives- Mutexes- Condition Variables- Semaphores- Mail Boxes- Event flags- Spin locks (on SMP systems)

Priority inversion Control- Inheritance- Ceiling

-Own implementation


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eCos K e r n e l c o re c o m ponent s

Counters, Clocks, AlarmsInterrupts- Split interrupt model

-APIs

Scheduler- Scheduler implementations API- Scheduler Control API

Device drivers API


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eCos Libra r i es c o re c o m ponent s

Math LibrariesC LibraryCompatibility Libraries

- EL/IX- ITRON- POSIX

PCI supportTCP/IP networking support


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eCos RedBoot ROM Moni t o r

Red Hat embedded Debug and BootstrapeCos low level application uses HAL APIimplemented features:- Boot scripting- Command Line Interface- Access via Serial or Ethernet ports- GDB Support- Flash Image System Support- X/Y Modem Support- Network bootstrap support (BOOTP, static address)


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eCos e m b ed de d Co nf ig ur ab le o pe ra t i ng s ys t e m

http://ecos.sourceware.orgAnthony Massa, embedded software

design with eCoswww.ecoscentric.com

[email protected]
http://ecos.sourceware.org/http://www.mind.be/http://www.mind.be/http://ecos.sourceware.org/

evaluation of ecos embedded

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