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e4218: SIM/FLEXBUS: SIM_SCGC7[FLEXBUS] bit should be cleared when the FlexBus is not being used. Errata type: Errata Description: The SIM_SCGC7[FLEXBUS] bit is set by default. This means that the FlexBus will be enabled and come up in global chip select mode. With some code sequence and register value combinations the core could attempt to prefetch from the FlexBus even though it might not actually use the value it prefetched. In the case where the FlexBus is unconfigured, this can result in a hung bus cycle on the FlexBus. Workaround: - If the FlexBus is not being used, disabled the clock to the FlexBus during chip initialization by clearing the SIM_SCGC7[FLEXBUS] bit. - If the FlexBus will be used, then enable at least one chip select as early in the chip initialization process as possible.
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The friendly Operating System for IoT!
FEATURES
RIOT OS is an operating system for Internet of Things (IoT) devices. It is based on a microkernel and designed for
- energy efficiency
- hardware independent development
- a high degree of modularity
Its features comprise
- a preemptive, tickless scheduler with priorities
- flexible memory management
- high resolution timers
- virtual, long-term timers
- 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
- Wiselib support (C++ algorithm library, including routing, clustering, timesync, localization, security and more algorithms)
- IPv6
- UDP
- 6LoWPAN
- NHDP
GETTING STARTED
- You want to start the RIOT? Just follow our 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 nativenet 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
- All sources and binaries that have been developed at Freie Universität Berlin are licensed under the GNU Lesser General Public License 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: