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A dispatcher function is implemented for directing writes to the correct function. The dispatcher is bypassed completely if the CPU only contain one kind of UART module. There are at least two different UART hardware modules deployed in different Kinetis CPU families (or possibly three or more when counting variations of the UART module). The UART module is an older 8 bit module with advanced functionality, while the LPUART is a 32 bit module with focus on low power consumption. - The older families in the K series all have UART modules. - The K22F family have both UART and LPUART modules in the same CPU. - Older L series (e.g. KL25Z) have two variations of the UART module - Newer L series (e.g. KL43Z) have LPUART modules, and sometimes UART as well. - Newer W series (KW41Z) have only LPUART
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The friendly Operating System for IoT!
RIOT is a real-time multi-threading operating system that supports a range of devices that are typically found in the Internet of Things (IoT): 8-bit, 16-bit and 32-bit microcontrollers.
RIOT is based on the following design principles: energy-efficiency, real-time capabilities, small memory footprint, modularity, and uniform API access, independent of the underlying hardware (this API offers partial POSIX compliance).
RIOT is developed by an international open source community which is independent of specific vendors (e.g. similarly to the Linux community). RIOT is licensed with LGPLv2.1, a copyleft license which fosters indirect business models around the free open-source software platform provided by RIOT, e.g. it is possible to link closed-source code with the LGPL code.
FEATURES
RIOT is based on a microkernel architecture, and provides features including, but not limited to:
- a preemptive, tickless scheduler with priorities
- flexible memory management
- high resolution, long-term timers
- support for AVR, MSP430, MIPS, ARM7, and ARM Cortex-M on over 80 boards
- the native port allows to run RIOT as-is on Linux, BSD, and MacOS. Multiple instances of RIOT running on a single machine can also be interconnected via a simple virtual Ethernet bridge
- IPv6
- 6LoWPAN (RFC4944, RFC6282, and RFC6775)
- UDP
- RPL (storing mode, P2P mode)
- CoAP
- CCN-Lite
GETTING STARTED
- You want to start the RIOT? Just follow our quickstart guide or the getting started documentation.
- The RIOT API itself can be built from the code using doxygen. The latest version is uploaded daily to http://riot-os.org/api.
USING THE NATIVE PORT WITH NETWORKING
If you compile RIOT for the native cpu and include the netdev_tap module,
you can specify a network interface like this: PORT=tap0 make term
SETTING UP A TAP NETWORK
There is a shellscript in RIOT/dist/tools/tapsetup called tapsetup which
you can use to create a network of tap interfaces.
USAGE To create a bridge and two (or count at your option) tap interfaces:
./dist/tools/tapsetup/tapsetup [-c [<count>]]
CONTRIBUTE
To contribute something to RIOT, please refer to the development procedures and read all notes for best practice.
MAILING LISTS
- RIOT OS kernel developers list
- devel@riot-os.org (http://lists.riot-os.org/mailman/listinfo/devel)
- RIOT OS users list
- users@riot-os.org (http://lists.riot-os.org/mailman/listinfo/users)
- RIOT commits
- commits@riot-os.org (http://lists.riot-os.org/mailman/listinfo/commits)
- Github notifications
- notifications@riot-os.org (http://lists.riot-os.org/mailman/listinfo/notifications)
LICENSE
- Most of the code developed by the RIOT community is licensed under the GNU Lesser General Public License (LGPL) version 2.1 as published by the Free Software Foundation.
- Some external sources, especially files developed by SICS are published under a separate license.
All code files contain licensing information.
For more information, see the RIOT website: