mirror of
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117 lines
4.6 KiB
Text
117 lines
4.6 KiB
Text
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New version, still under construction, is available here : https://github.com/lepton-distribution/lepton-root.scions.
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Legacy version available on this github depot: https://github.com/lepton-distribution/lepton
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LEPTON/TAUON OPERATING SYSTEM
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Lepton/Tauon is an open source POSIX "compliant" Operating System for
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deeply embedded devices. It tries to bring PSE-53 POSIX capabilities
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to embedded world (including multiprocess, filesystems, messages
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queues, ... BUT currently no asynchronous I/O support).
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The system implementation follows an UNIX approach.
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The aim of this project, it's not to develop another operating system
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like GNU/Linux, but an human understandable operating system that provides
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more services than a realtime kernel, while keeping a reasonable footprint
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for deeply embedded system.
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We hope Lepton/Tauon will be able to help anybody to develop their personal,
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school or professional projects easily and quickly.
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We are ready to accommodate contributions to improve Lepton/Tauon and support
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new features.
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Supported platforms:
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-. ARM7: AT91M55800A (Atmel)
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-. ARM9: AT91SAM9261-EK (Atmel)
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-. ARM9: AT91SAM9260-EK (Atmel)
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-. ARM Cortex-M4: TWR-K60N512 (Freescale)
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-. PC (32bits simulation for GNU/Linux and MS Windows)
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Initial version of Lepton/Tauon is 4.0.0.0.
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Lepton/Tauon provides more than 150 POSIX functions over a real-time
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operating system that can be:
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-. Proprietary embOS from Segger (original Lepton)
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-. Open source eCos community (Tauon)
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Lepton/Tauon offers the ability to use other real-time operating system (closed
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or open source) like FreeRTOS by using a simple abstraction layer.
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Lepton/Tauon uses some parts of underlying real-time operating system:
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-. board startup (HAL)
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-. basic synchronization functions (semaphore, mutex, ...)
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-. task sheduler
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-. ISR mechanisms
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-. some libraries (math.h, stdlib.h, ...)
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In addition Lepton/Tauon offers:
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-. more than 150 functions from POSIX standard (IEEE Std 1003.1a),
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realtime extension (1003.1b) and threads extension (1003.1c)
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-. simple model for device drivers
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-. UNIX stream to improve "reuse"
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-. support lwip stack (1.3.2)
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-. support uip stack (1.0) (Lepton only)
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-. support rootfs, ufs, fat16 (msdos and vfat) filesystem
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-. VFS layer to brings new and custom file systems
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-. USB devices stack and profils CDC-ACM, MSD and Ethernet-ECM (tested
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only on AT91SAM9261-EK)
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-. NanoX and FLTK support (FLNX exactly)
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-. Mongoose WEB server, FTP server (from trollFTPD) and mini shell
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-. simulation process under GNU/Linux (Tauon) and Windows (Lepton)
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To install Lepton/Tauon and launch a sample application see docs/INSTALL.
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To see what is Lepton/Tauon, installation are tested on:
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-. Debian Squeeze and Wheezy
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-. Ubuntu 11.10
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To create your application, see docs/START.
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To see all available function, see docs/AVAILABLE_POSIX
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Changes made in version 4.0.0.0 are documented in the ChangeLog file.
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Directories and/or files in this distribution:
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-. tools : tools to build a Lepton/Tauon application
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-. sys/user : part for user application sources, libraries and
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binaries
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-. sys/root/lib/arch : install path for all supported eCos HAL
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-. sys/root/prj/scons : general compilations files for arch supported
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by Lepton/Tauon.
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-. sys/root/prj/config : a pkg-config files use for compilation and a
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minicom configuration file for simulation
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-. sys/root/src/sbin : source files for general utilities (mini
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shell aka lsh, mkfs, ls, uname, ...)
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-. sys/root/src/bin/net : source files for high level networking
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utilities like web server or telnet server.
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-. sys/root/src/lib : source files for all common libraries (libc,
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pthread, ..)
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-. sys/root/src/kernel/core : source files for all kernel functions
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-. sys/root/src/kernel/core/core-ecos : source files for kernel
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functions that use underlying real-time os functions
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-. sys/root/src/kernel/fs : source files for supported filesystems.
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-. sys/root/src/kernel/net : source files for supported net stack.
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Currently, Tauon only supports lwip.
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-. sys/root/src/kernel/dev : source files for device drivers.
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Send comments/corrections/improvements to lepton-discuss@googlegroups.com.
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The Lepton/Tauon home page is http://code.google.com/p/lepton/.
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Thanks to:
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* eCos: http://ecos.sourceware.org/
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* lwip: http://savannah.nongnu.org/projects/lwip/
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* nano-X: http://www.microwindows.org/
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* fltk: http://www.fltk.org/
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* openOCD: http://openocd.sourceforge.net/
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* all BSD and GNU tools...
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Philippe Le Boulanger (original author of Lepton and maintainer)
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<lepton.phlb@gmail.com>
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Jean-Jacques Pitrolle (maintainer)
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<lepton.jjp@gmail.com>
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