 | |
| Developer | eCos community,Free Software Foundation |
|---|---|
| Written in | C,C++,assembly |
| Working state | Current |
| Source model | Open source |
| Initial release | September 1998; 26 years ago (1998-09) |
| Latest release | eCosPro 4.1 / June 28, 2017; 7 years ago (2017-06-28) |
| Marketing target | Embedded systems |
| Platforms | ARM (Cortex-A5,-A7,-A9,-A53,-M3,-M4,-M7); CalmRISC,FR-V,Hitachi H8,IA-32,Motorola 68000, Matsushita AM3x,MIPS,NEC V850,Nios II,PowerPC,SPARC,SuperH |
| Kernel type | Real-time |
| License | eCos License:GNU General Public License (withlinking exception)[1] |
| Official website | ecos |
TheEmbedded Configurable Operating System (eCos) is afree and open-sourcereal-time operating system intended forembedded systems and applications which need only oneprocess withmultiple threads. It is designed to be customizable to precise application requirements of run-time performance and hardware needs. It is implemented in theprogramming languagesC andC++ and hascompatibility layers andapplication programming interfaces for Portable Operating System Interface (POSIX) and The Real-time Operating system Nucleus (TRON) variantμITRON. eCos is supported by popularSSL/TLS libraries such aswolfSSL, thus meeting all standards for embedded security.[2]
eCos was designed for devices with memory sizes in the range of a few tens or several hundredkilobytes,[3] or for applications with real-time requirements.
eCos runs on a wide variety of hardware platforms, includingARM, CalmRISC,FR-V,Hitachi H8,IA-32,Motorola 68000, Matsushita AM3x,MIPS,NEC V850,Nios II,PowerPC,SPARC, andSuperH.
The eCos distribution includesRedBoot, anopen sourceapplication that uses the eCoshardware abstraction layer to providebootstrapfirmware forembedded systems.
eCos was initially developed in 1997[4] byCygnus Solutions which was later bought byRed Hat. In early 2002, Red Hat ceased development of eCos and laid off the staff of the project.[5] Many of the laid-off staff continued to work on eCos and some formed their own companies providing services for the software. In January 2004, at the request of the eCos developers, Red Hat agreed to transfer the eCos copyrights to theFree Software Foundation[6] in October 2005, a process finally completed in May 2008.
TheeCosProreal-time operating system is a commercialfork of eCos created byeCosCentric which incorporatesproprietary software components. It is claimed as a "stable, fully tested, certified and supported version",[7] with additional features that are not released as free software. On Pi Day 2017, eCosCentric announced[8] they had ported eCosPro to all of the Raspberry Pi models, with demonstrations at the Embedded World trade fair in Nuremberg (Germany) and releases free for non-commercial uses to follow.
eCos is released under a modified version of the well known GNU General Public License (GPL).
eCos was conceived and initially developed by Cygnus Solutions Inc., who initiated the project in February 1997.
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