Downloaded 115 times
Uploaded bySumant Diwakar
Embedded Linux Talk Uni Forum
The document discusses embedded operating systems and Linux as an option. It provides an overview of embedded operating systems, real-time operating systems, key players in the embedded OS market, commercial and open source Linux distributions for embedded systems, hardware platforms, development tools, applications, and the growth of Linux in the embedded market.
Embedded Linux Talk Uni Forum
- 1. Embedded Operating Systemsand Linux Bill Latura April 23, 2002
- 2. Agenda What is an embedded Operating System Who are the players Linux as an embedded OS Tools and development Applications and products The embedded OS market Embedded OS Resources
- 3. OS Flavors DesktopWindows (9X, XP Home, XP/2000 Pro) Mac Server Windows (XP/2000 Server &Advanced Server) Unix Varieties Embedded Many
- 4. What is anEmbedded OS? An "embedded system" is any computer system or computing device that performs a dedicated function or is designed for use with a specific embedded software application. Embedded systems may use a ROM-based operating system or they may use a disk-based system, like a PC. But an embedded system is not usable as a commercially viable substitute for general purpose computers or devices.
- 5. What makes agood Embedded OS? Modular Scalable Configurable Small footprint CPU support Device drivers etc, etc, etc...
- 6. What is RealTime? “A real time system is one in which the correctness of the computations not only depends upon the logical correctness of the computation but also upon the time at which the result is produced. If the timing constraints of the system are not met, system failure is said to have occurred.” - Donald Gillies
- 7. What is RealTime? “Real time in operating systems: The ability of the operating system to provide a required level of service in a bounded response time.” - POSIX Standard 1003.1
- 8. Hard vs. SoftReal Time Hard guaranteed worst-case response times absolutely, positively, first time every time Soft Kinda, sorta, usually
- 9. What makes agood RTOS? Multi-threaded and pre-emptible Thread priority has to exist because no deadline driven OS exists Must support predictable thread synchronization mechanisms A system of priority inheritance must exist
- 10. Who are theEmbedded OS players? Wind River Systems VxWorks pSOS QNX Software Systems QNX Green Hills Software Integrity
- 11. Who are theEmbedded OS players? Mentor Graphics VRTX Palm Computing PalmOS Symbian SymbianOS
- 12. Microsoft Embedded NT/XP “ Real-time” control Windows CE (CE.NET) Internet devices Pocket PC 2002 Handheld PC’s and PDA’s
- 13. Commercial Embedded Linux AMIRIX Embedded Linux derived from Debian Coollogic Coollinux combines Linux and Java for Internet apps Coventive Xlinux kernel can be as small as 143KB Esfia RedBlue Linux 400K, designed for wireless apps
- 14. Commercial Embedded Linux KYZO Pizza Box Linux SAMBA based file, print, CD server Lineo Embedix supports real time and high availability apps LynuxWorks BlueCat general purpose embedded solution MontaVista Linux general purpose embedded solution
- 15. Commercial Embedded Linux Neoware NeoLinux Red Hat derived for information appliances PalmPalm Tynux Internet appliuance and multimedia Red Hat Embedded Linux general purpose embedded solution RedSonic Red-Ice Linux runs from DiskonChip or CompactFlash
- 16. Commercial Embedded Linux RidgeRun DSP Linux for multimedia, wireless, RT on DSP TimeSys Linux GPL low latency enhanced kernel Tuxia TASTE distro targets Internet appliances Vital Systems vLinux for ARM based embedded apps
- 17. Open Source EmbeddedLinux Embedded Debian Project convert Debian to an embedded OS ETLinux for PC104 SBC’s uCLinux for microprocessors that don’t have MM uLinux (muLinux) distro fits on a single floppy
- 18. Commercial Linux RTOSFSMLabs - Open RT Linux Lineo - Embedix Realtime LynuxWorks - BlueCat RT MontaVista Software - Real Time Extensions REDSonic - REDICE Linux TimeSys - Linux/Real-Time
- 19. Open Source LinuxRTOS ART Linux - real time extension based on RTLinux KURT - event schedules with 10us resolution Linux-SRT - for soft real time apps like multimedia Qlinux - provides Quality of Service guarantees RTAI - “hard” Real Time Application Interface
- 20. RTLinux A “hardreal-time” mini operating system runs Linux as it’s lowest priority execution thread Linux thread completely preemptible Real time threads and interrupt handlers never delayed by non-realtime operations Supports user level programming MiniRTL implementation fits on a floppy
- 21. What’s so specialabout Linux? Multiple choices vs. sole source Source code freely available Robust and reliable Modular, configurable, scalable Superb support for networking and Internet No runtime licenses Large pool of skilled developers
- 22. What’s so specialabout Linux?
- 23. What’s special aboutOpen Source?
- 24. Flies in theOintment Lack of hardware device drivers Competing and/or lacking standards No formalized qualification testing No single source for marketing GPL license issues Startup vendors with shaky futures
- 25. What CPU’s willit run on? Intel X86 MIPS ARM StrongARM PowerPC Hitachi SuperH
- 26.
- 27. Single Board Computers Little Board (5.75 x 8.0 in.) -- complete systems on a single compact board, expandable with plug-on function modules ISA "slot boards" (full-length, 13.8 x 4.8 in.; half-length, 7.1 x 4.8 in.) -- IBM PC plug-in cards which could function as standalone SBCs backplanes) PC/104 modules (3.6 x 3.8 in.) -- compact, rugged, self-stacking modules featuring a reliable pin-and-socket board-to-board expansion bus
- 28. Single Board Computers with PCI PC/104-Plus -- PCI added to PC/104 EBX -- PC/104-Plus added to Little Board
- 29.
- 30. Any Development ToolsAvailable? QT/Embedded Other GUI/Windowing toolkits Arcom Control Systems GNUPro Tools Vendor specific Standard Linux toolset
- 31. C or C++for Development? In general C is a better choice Advanced OOP features can cause code bloat C++ compilers can generate many routines for a single function Virtual methods and polymorphism slow program launch times significantly Size really does matter
- 32. What’s It BeingUsed For? Control and Monitoring Applications Industrial Controllers TV Set Top Boxes (TiVO) Handheld PDA’s Automobile Computers Telecomm and Networking Hardware Myriad and sundry other uses...
- 33.
- 34. Cyclades TS-100 Netlinos OS Dual 50MHz PowerPC 16MB SDRAM 4MB Flash Ethernet/Serial/RS485 Size of a deck of cards
- 35. Sixnet VersaTRAK IPm Embedded Linux PowerPC CPU 16MB DRAM 16MB Flash Serial & Ethernet Ports Linux and IEC1131 Programming/Modbus
- 36. Sharp Zaurus Lineo Embedix 206 MHz StrongARM 64 MB DRAM 16MB Flash 3.5” display (320x240) 64K colors Opera browser & Qtopia QT/Embedded GUI
- 37. Cell and WebPhones Telepong Mobile Phone GITWiT Mobile Phone Aplio/PRO IP Phone
- 38. TiVO Set TopBox Home grown port of Embedded Linux 54MHz PowerPC Multi GB hard disk
- 39. Axis 2120 NetworkCamera uCLinux Built-in Ethernet port 100 MHz ETRAX CPU 16 MB RAM
- 40. Humanoid Robots IsamuUniv. of Tokyo/Kawanda Ind. Dual Pentium CPU RT-Linux Height: 53 inches Weight: 121 lbs.
- 41. Humanoid Robots FujitsuRT-Linux Height: 48 cm Weight: 6 kg 100 units/yr HOAP
- 42. The Embedded OSMarket 2001
- 43. The Embedded OSMarket 2002
- 44. Growth of EmbeddedLinux
- 45. For Further Info Web Sites LinuxDevices.com http://www.linuxdevices.com/ Embedded Linux Consortium http://www.embedded-linux.org/index.php3 All Linux Devices http://alllinuxdevices.com/ Embedded Linux StarGate http://linux-embedded.com/
- 46. For Further Info Web Sites/Magazines Dr. Dobbs Embedded Systems http://www.ddjembedded.com/about/ Embedded Linux Journal http://embedded.linuxjournal.com/ Embedded Systems Programming http://www.embedded.com/mag.htm