The official git repository for OSD-Contiki, the open source OS for the Internet of Things
d0a546b049
Technical changes: * Factored out file specific information from the file descriptor structure into a new file structure. - Useful file metadata can be stored after the file is closed. - File descriptors become much smaller. - Significantly reduces the need to scan for the file end. * Use correct types in all function signatures. * Removed the directory cache. Results: * Enormous speed increase when opening cached files (10x-20x.) * Multiple fd:s pointing to the same file have the correct semantics. * About 100 bytes smaller ROM size. * Slightly smaller static RAM size. |
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| apps | ||
| backyard | ||
| core | ||
| cpu | ||
| doc | ||
| examples | ||
| platform | ||
| tools | ||
| Makefile.include | ||
| README | ||
| README-BUILDING | ||
| README-EXAMPLES | ||
Contiki is an open source, highly portable, multi-tasking operating system for memory-constrained networked embedded systems written by Adam Dunkels at the Networked Embedded Systems group at the Swedish Institute of Computer Science. Contiki is designed for embedded systems with small amounts of memory. A typical Contiki configuration is 2 kilobytes of RAM and 40 kilobytes of ROM. Contiki consists of an event-driven kernel on top of which application programs are dynamically loaded and unloaded at runtime. Contiki processes use light-weight protothreads that provide a linear, thread-like programming style on top of the event-driven kernel. Contiki also supports per-process optional preemptive multi-threading, interprocess communication using message passing through events, as well as an optional GUI subsystem with either direct graphic support for locally connected terminals or networked virtual display with VNC or over Telnet. Contiki contains two communication stacks: uIP and Rime. uIP is a small RFC-compliant TCP/IP stack that makes it possible for Contiki to communicate over the Internet. Rime is a lightweight communication stack designed for low-power radios. Rime provides a wide range of communication primitives, from best-effort local area broadcast, to reliable multi-hop bulk data flooding. Contiki runs on a variety of platform ranging from embedded microcontrollers such as the MSP430 and the AVR to old homecomputers. Code footprint is on the order of kilobytes and memory usage can be configured to be as low as tens of bytes. Contiki is written in the C programming language and is freely available as open source under a BSD-style license. More information about Contiki can be found at the Contiki home page: http://www.sics.se/contiki/