free software for machine design

... of the World-Wide Web (WWW) as information source, it has become rou- tine for Internet users to access textual data written in foreign languages. In Japan, for example, a dozen or so inexpensive ... systems based on these formalisms, on the other hand, would not be possible without much more efficient parsing and disambiguation algorithms for these formalisms and a method for building a lexicon ... of head constraints holds throughout the parsing process. 145 Pattern-Based Context -Free Grammars for Machine Translation Koichi Takeda Tokyo Research Laboratory, IBM Research 1623-14 Shimotsuruma,...

Ngày tải lên: 31/03/2014, 06:20

... Calculations for Machine Design was written to be a companion to Marks’ Standard Handbook for Mechanical Engineers, providing detailed calculations to the important problems in machine design. For each ... columns, the secant formula for eccentric loading, as well as a discussion on how to deal with short columns. Chapter 7, Fatigue and Dynamic Design, contains information on how to design for dynamic ... four rivets that must carry the force (P), the shear force (V ) for each rivet is Step 2. As there are four rivets that must carry the force (P), the shear force (V ) for each rivet is 4V = P → V...

Ngày tải lên: 08/04/2014, 11:00

Ngày tải lên: 09/08/2013, 15:00

... ) and can  boot several operating systems (Linux, uClinux, and others) Softgun: http://softgun.sourceforge.net Virtual ARM system with many virtual on­board peripherals.  Boots Linux. SWARM ­ Software ARM ­ arm7 emulator http://www.cl.cam.ac.uk/~mwd24/phd/swarm.html Can run uClinux 13 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 klibc http://www.kernel.org/pub/linux/libs/klibc/ “Kernel C library” Tiny and minimalistic C library designed for use in an initramfs at  boot time (alternative to initrds). Fine for the creation of simple shell scripts. Ships with small executables for use in shells, built with klibc, and a klcc compiler to compile your own applications. Not elaborate enough to support BusyBox applications. Useful details in  http://en.wikipedia.org/wiki/Klibc 19 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 Platform specific toolchains (1) ARM Code Sourcery (supports GNU/Linux, EABI and uClinux): http://www.codesourcery.com/gnu_toolchains/arm/ Also available for Windows workstations. MIPS http://www.linux­mips.org/wiki/Toolchains (useful links) 6 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 Training contents (3) Annexes Automatic system generation with BitBake / OpenEmbedded 33 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 Other emulators ColdFire emulator http://www.slicer.ca/coldfire/ Can boot uClinux 37 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 Minicom (1) Definition: serial communication program Available in all GNU / Linux distributions Capabilities (all through a serial link): Serial console to a remote Unix system File transfer Modem control and dial­up Serial port configuration 50 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 Denx Software Engineering http://denx.de Created by Wolfgang Denk, the author of the U­Boot bootloader. Create and support the Embedded Linux Development Kit (ELDK), a complete and well documented development environment. This kit is not only Free Software, it can be downloaded freely by anyone. A great community member and contributor! 15 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 Free Software tools for embedded systems GNU / Linux workstation Cross­compiling toolchains 9 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 uClibc http://www.uclibc.org/ from CodePoet Consulting License: LGPL Lightweight C library for small embedded systems, with most features  though. The whole Debian Woody was ported to it ... Support services Useful if you don't have your  own support resources Long term support commitment,  even for versions considered as  obsolete by the community, but  not by your users! 44 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 Commercial toolsets Caution: commercial doesn't mean proprietary! Vendors play fair with the GPL and do make their source code  available to their users, and most of the time, to the community. As long as they distribute the sources to their users, the GPL  doesn't require vendors to share their sources with any third party. No issue with all the GPL sources developed by or with the  community. Graphical toolkits developed by the vendors look proprietary. Their  licenses are not advertised on their websites! You have to be a  customer to know or get a free preview kit to know. 35 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 Free Software tools for embedded systems GNU / Linux workstation Various tools 34 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 Emulators ­ Summary System emulators Useful to experiment with a full system, including the kernel qemu: x86, x86_64, arm, sparc, ppc, mips SkyEye: several arm architectures User emulators Useful to run or debug user space binaries for other CPUs qemu: x86, arm, sparc, ppc, mips 20 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 Platform specific toolchains (2) Coldfire Code Sourcery (supports ELF, GNU/Linux and uClinux): http://www.codesourcery.com/gnu_toolchains/coldfire PowerPC Code Sourcery (supports GNU/Linux and EABI) http://www.codesourcery.com/gnu_toolchains/power.html 49 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 Sysgo ­ Koan Software http://sysgo.com ELinOS development toolset, in particular based on Eclipse and the Linux Trace Toolkit. Includes FreeToolBox, a freely  downloadable compiling and rootfs  creating toolchain. Supports i386, arm and ppc. Hard real­time support with their own  microkernel (PikeOS), an approach similar to RTAI. http://koansoftware.com Makers of KaeilOS (http://koansoftware.com/kaeilos/), a GPL  embedded Linux distribution for industrial  applications. KaeilOS supports i386 and popular arm  platforms. Other platforms supported upon  request. Includes several graphical toolkits and  supports hard real­time (RTAI, Xenomai,  preemption patches). Unfortunately, KaeilOS is GPL but not  available for public download. 16 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 Standalone toolchain build Building a cross­compiling toolchain by yourself is a difficult and painful task!  Can take days or weeks! Lots of details to learn. Several components to build (building gcc twice: once for gcc + once for compilers that need the C library). Lots of decisions to make (such as C library version and configuration for your platform) Need kernel headers and C library sources Need to be familiar with current gcc issues and patches on your platform Useful to be familiar with building and configuring tools http://www.aleph1.co.uk/armlinux/docs/toolchain/toolchHOWTO.pdf can show you how fun it can be! 21 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 Toolchain building utilities Buildroot: http://buildroot.uclibc.org/ Dedicated Makefile to build uClibc based toolchains and even entire root filesystems. Downloads sources and applies patches. Crosstool:  http://www.kegel.com/crosstool/ Dedicated script to build glibc based toolchains Doesn’t support uClibc yet. Downloads sources and applies patches. 26 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 Toolchains ­ useful resources eLinux.org toolchain page: http://elinux.org/Tool_Chains 29 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 Free Software tools for embedded systems GNU / Linux workstation Emulators 8 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 glibc http://www.gnu.org /software/ libc/ License: LGPL C library from the GNU project Designed for performance, standards compliance and  portability Found on all GNU / Linux host systems Quite big for small embedded systems: about 1.7 MB on  Familiar Linux iPAQs (libc: 1.2 MB, libm: 500 KB) 36 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 chroot Available in all GNU/Linux distributions Usage: chroot <dir> [command] Runs a command or an interactive shell with a special root directory. Standard usage: Internet servers Services executed in chroot jails: even when compromised, the service cannot gain access to the rest of the system. Usage for embedded system development: Develop and test a new root filesystem on the development host. Very easy to use when the host and target have the same CPU instruction set. Used by LFS (Linux From Scratch). Also used by Scratchbox: Qemu makes the usage of target binaries transparent. / bin lib etc http / lib etc bin chroot jail ... Support services Useful if you don't have your  own support resources Long term support commitment,  even for versions considered as  obsolete by the community, but  not by your users! 44 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 Commercial toolsets Caution: commercial doesn't mean proprietary! Vendors play fair with the GPL and do make their source code  available to their users, and most of the time, to the community. As long as they distribute the sources to their users, the GPL  doesn't require vendors to share their sources with any third party. No issue with all the GPL sources developed by or with the  community. Graphical toolkits developed by the vendors look proprietary. Their  licenses are not advertised on their websites! You have to be a  customer to know or get a free preview kit to know. 35 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 Free Software tools for embedded systems GNU / Linux workstation Various tools 34 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 Emulators ­ Summary System emulators Useful to experiment with a full system, including the kernel qemu: x86, x86_64, arm, sparc, ppc, mips SkyEye: several arm architectures User emulators Useful to run or debug user space binaries for other CPUs qemu: x86, arm, sparc, ppc, mips 20 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 Platform specific toolchains (2) Coldfire Code Sourcery (supports ELF, GNU/Linux and uClinux): http://www.codesourcery.com/gnu_toolchains/coldfire PowerPC Code Sourcery (supports GNU/Linux and EABI) http://www.codesourcery.com/gnu_toolchains/power.html 49 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 Sysgo ­ Koan Software http://sysgo.com ELinOS development toolset, in particular based on Eclipse and the Linux Trace Toolkit. Includes FreeToolBox, a freely  downloadable compiling and rootfs  creating toolchain. Supports i386, arm and ppc. Hard real­time support with their own  microkernel (PikeOS), an approach similar to RTAI. http://koansoftware.com Makers of KaeilOS (http://koansoftware.com/kaeilos/), a GPL  embedded Linux distribution for industrial  applications. KaeilOS supports i386 and popular arm  platforms. Other platforms supported upon  request. Includes several graphical toolkits and  supports hard real­time (RTAI, Xenomai,  preemption patches). Unfortunately, KaeilOS is GPL but not  available for public download. 16 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 Standalone toolchain build Building a cross­compiling toolchain by yourself is a difficult and painful task!  Can take days or weeks! Lots of details to learn. Several components to build (building gcc twice: once for gcc + once for compilers that need the C library). Lots of decisions to make (such as C library version and configuration for your platform) Need kernel headers and C library sources Need to be familiar with current gcc issues and patches on your platform Useful to be familiar with building and configuring tools http://www.aleph1.co.uk/armlinux/docs/toolchain/toolchHOWTO.pdf can show you how fun it can be! 21 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 Toolchain building utilities Buildroot: http://buildroot.uclibc.org/ Dedicated Makefile to build uClibc based toolchains and even entire root filesystems. Downloads sources and applies patches. Crosstool:  http://www.kegel.com/crosstool/ Dedicated script to build glibc based toolchains Doesn’t support uClibc yet. Downloads sources and applies patches. 26 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 Toolchains ­ useful resources eLinux.org toolchain page: http://elinux.org/Tool_Chains 29 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 Free Software tools for embedded systems GNU / Linux workstation Emulators 8 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 glibc http://www.gnu.org /software/ libc/ License: LGPL C library from the GNU project Designed for performance, standards compliance and  portability Found on all GNU / Linux host systems Quite big for small embedded systems: about 1.7 MB on  Familiar Linux iPAQs (libc: 1.2 MB, libm: 500 KB) 36 Free Software tools for embedded systems © Copyright 2004­2008, Free Electrons Creative Commons Attribution­ShareAlike 2.5 license http:/ /free electrons.com Jan 24, 2008 chroot Available in all GNU/Linux distributions Usage: chroot <dir> [command] Runs a command or an interactive shell with a special root directory. Standard usage: Internet servers Services executed in chroot jails: even when compromised, the service cannot gain access to the rest of the system. Usage for embedded system development: Develop and test a new root filesystem on the development host. Very easy to use when the host and target have the same CPU instruction set. Used by LFS (Linux From Scratch). Also used by Scratchbox: Qemu makes the usage of target binaries transparent. / bin lib etc http / lib etc bin chroot jail ...

Ngày tải lên: 20/10/2013, 00:15

... other free programs whose distribution conditions are different, write to the author to ask for permission. For software that is copyrighted by the Free Software Foundation, write to the Free Software ... exceptions for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally. ... documented the individual software commands that told a machine what to do. Xerox, in this instance, had provided software files in precompiled, or binary, form. Programmers were free to open the files...

Ngày tải lên: 16/02/2014, 23:20

... as an absentminded profes- 12 … FREE FOR ALL FreeForAll/1-138/repro 4/21/00 11:44 AM Page 12 stop people from working on free software if they wanted to hack. The freedom to create was more powerful ... the 22 … FREE FOR ALL FreeForAll/1-138/repro 4/21/00 11:44 AM Page 22 what they want. There is no need for the FreeBSD management to meet and decide “Multimedia is good.” There is no need for a ... four main principles: The freedom to run the program, for any purpose (freedom 0). 1 The freedom to study how the program works, and adapt it to your needs (freedom 1). The freedom to redistribute...

Ngày tải lên: 29/03/2014, 12:20

... could substitute for QFD. 1.9 Design for Manufacture (DFM) The principles of design for manufacture and design for electronic as- sembly have been widely been used in industry through design guide- lines ... process 10.2 Technical Design Information Flow and Six Sigma 327 System Design 10.2.1 Opportunities in six sigma for system or 328 product design improvements 10.2.2 The system design process 329 10.2.3 ... Click Here for Terms of Use. Six Sigma for Electronics Design and Manufacturing For a company aiming to design products with the lowest possible num- ber of defects, traditional three-sigma designs...

Ngày tải lên: 07/02/2013, 09:47

... 201 3MACHINE DESIGN. com20 designs, they could be custom shaped to make better use of the available space. As the design stands now, we have al- most the entire forearm empty and available for ... electronics. Learn more and register at http://machinedesign.com/ training. Formula Hybrid racer The Formula Hybrid design competition has students building high-performance race cars that are also efficient ... www.jhuapl.edu/prosthetics For another feature on prosthetic hands, scan this code or go to http:// machinedesign.com/ article/giving-artificial- hands-a-sense-of- touch-0909 MARCH 7, 2013 MACHINE DESIGN. com...

Ngày tải lên: 25/03/2013, 12:46

Ngày tải lên: 29/08/2013, 13:32

... Các phần mềm miễn phí hay: nBINDER 3.0 Nén, bảo vệ và đóng gói dữ liệu (free) nBinder là chương trình miễn phí cho phép nén các tập tin thi hành mà không làm thay đổi ... trình có dung lượng 157 kb, tải tại www.nemokprod.go.ro hay www.echip.com.vn Access Manager 2.0 ( free) Chương trình quản lý mật khẫu miễn phí đơn giản và dễ sử dụng. Người sử dụng dùng 1 mật ... password). Chương trình nặng 1,63MB, tải tại www.access-manager.co.uk hay www.echip.com.vn ROTATE 1.02 (free) xoay màn hình theo ý muốn IRotate là chương trình cho phép bạn xoay chuyển màn hình theo các...

Ngày tải lên: 14/09/2013, 05:10

Ngày tải lên: 17/10/2013, 12:15

... from outside, for example, in punching press forces of very large magnitude is applied for a short while (impulsive force), in crank shafts variable loads act due to nature of force arising ... cylinders. Often dynamic forces appear in the moving parts, e.g., inertia forces in machines and mechanisms, forces due to unbalance of the rotating components etc. Since these forces are to be withstood ... value. For a complete reversal of stress the value of K = -1. The design stress for completely reversing load is calculated using the formula 1, 1, 1 a d k σ σ − − − = where 1,d σ − = design...

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