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2015.12: added release notes
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‎release-notes.txt

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RIOT-2015.12 - Release Notes
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============================
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RIOT is a real-time multi-threading operating system that supports a range of
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devices that are typically found in the Internet of Things: 8-bit
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microcontrollers, 16-bit microcontrollers and light-weight 32-bit processors.
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RIOT is based on the following design principles: energy-efficiency, real-time
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capabilities, small memory footprint, modularity, and uniform API access,
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independent of the underlying hardware (this API offers partial POSIX
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compliance).
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RIOT is developed by an international open source community which is
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independent of specific vendors (e.g. similarly to the Linux community).
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About this release:
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===================
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This release is mostly a clean-up and bug-fixing release. Besides that, it introduces SAUL,
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the [S]ensor [A]ctuator [U]ber [L]ayer, which offers a unified API to interact with all
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different types of sensors and actuators on RIOT supported hardware. Furthermore, it re-enables
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the support for ICN by integrating CCN-Lite as a package. A lot of new overall documentation was
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added and existing documentation was improved (http://riot-os.org/api/). In addition,
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a Vagrant (https://www.vagrantup.com/) configuration file was added to the RIOT repository in
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order to create reproducible and portable environments that contain all necessary toolchains.
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About 222 pull requests with about 631 commits have been merged since the last release and 48
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additional issues have been solved. 37 people contributed code in 102 days. 980 files have been
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touched with ~59779 insertions and ~12115 deletions.
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Notations used below:
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=====================
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+ means new feature/item
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* means modified feature/item
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- means removed feature/item
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New features and changes
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========================
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General
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-------
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Device support
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--------------
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+ SAUL [S]ensor [A]ctuator [U]ber [L]ayer
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Core
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----
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* replaced deprecated dINT()/eINT() calls by up-to-date disableIRQ()/enableIRQ()/restoreIRQ()
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calls throughout the whole core
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Network Stack
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-------------
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+ TFTP support
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+ 6LoWPAN: Next Header Compression
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+ leaf mode for RPL nodes
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* RPL: refactoring of instances and dodags (saved 1kB ROM and 0,5kB RAM)
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* FIB: initial source route support
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* change to non-blocking 6LoWPAN fragmentation
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* POSIX sockets: various fixes
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* periodic stats printing for ping6 command
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* convert all vtimer into xtimer calls
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* send router advertisements without PIOs
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Packages
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--------
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+ CCN-Lite as a ICN network stack
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+ RELIC: efficient cryptography library
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* fix TLSF to compile with -pedantic
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Supported platforms
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-------------------
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Additional support for the following boards:
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+ weio board with NXP LPC11U34 (ARM Cortex-M0)
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+ Silicon Labs Wireless Eval Kit SLWSTK6220A (Wonder Gecko)
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+ STM32 Nucleo-F401
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Drivers
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-------
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+ Arduino-mega2560 GPIO
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+ Arduino pin mapping for Mega2560 and Due
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Network drivers
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---------------
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+ enc28j60 Ethernet chip
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+ at86rf2xx: Add support for channel page
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* at86rf2xx: fix LQI reading
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* implement sleep mode for at86rf2xx
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Sensors drivers
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---------------
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+ AT30TSE75x temperature sensor
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+ TCS3772 Color Light-to-Digital converter
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System libraries
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----------------
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+ partial support for the Arduino API
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+ lightweight semaphores
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+ fmt: simple string formatting library
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+ xtimer: 32-bit version of msg_recv_timeout
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* implicit socket binding for POSIX connect() and sendto()
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* posix_semaphore: make API POSIX compliant
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Examples
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--------
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+ microcoap/conn example
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+ minimal GNRC networking example
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Build System
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------------
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* split the Cortex-M0 buildtest group to avoid timeout issues with Travis
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* split the Cortex-M4 buildtest group to avoid timeout issues with Travis
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Other
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-----
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+ vagrant configuration
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+ documentation: various high-level descriptions of crucial features
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+ IoT-LAB: create and connect to debug server
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* pyterm: fix problems with German umlauts as input
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Fixed Issues from the last release
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==================================
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#2724: Add support for serial number passing to CMSIS boards, document it
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Documentation about how to discover and set the serial number of CMSIS-DAP chips is missing
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#3201: Odd length packet snips cause invalid check sum
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If an odd length packet snip occurs in a packet and is not the last snip
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(in the order the packet is supposed to be, not in the list's order)
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in a packet it will generate a wrong check sum.
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Known Issues
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============
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network related issues
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----------------------
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#3075: nhdp: unnecessary microsecond precision
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NHDP works with timer values of microsecond precision which is not required. Changing
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to lower precision would save some memory.
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#3086: Max. packet length for AT86RF2XX
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The size of the link-layer header is not dynamically calculated, but instead the maximum
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size is always assumed.
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#3970: RPL: Advertise DODAG only over the assigned interface
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gnrc_rpl seems to multicast DIOs over all interfaces, though gnrc_rpl_init expects an
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interface as parameter and sets the RPL-nodes multicast address only for that interface.
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#4048: potential racey memory leak
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According to the packet buffer stats, flood-pinging a multicast destination may lead to a
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memory leak due to a race condition. However, it seems to be a rare case and a
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completely filled up packet buffer was not observed.
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#4462: IPHC/NHC broken between Linux and a RIOT node with a RIOT-based border router in between.
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native related issues
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---------------------
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#495: native not float safe
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When the FPU is used when an asynchronous context switch occurs, either the
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stack gets corrupted or a floating point exception occurs.
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#534: native debugging on osx fails
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Using valgrind or gdb with a nativenet target in OSX leads to "the network"
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being stuck (gdb) or the whole process being stuck (valgrind).
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#3341 and #3824: nativenet crashes when hammered
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Flood-pinging a native instance from more than one host (either multiple threads on the
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host system or multiple other native instances), leads to a SEGFAULT.
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#4608: tests/xtimer_usleep_until: unstable behaviour
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The test starts to output "too large difference" and fails after a random period of time.
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other platform related issues
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-----------------------------
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#4560: make: clang is more pedantic than gcc
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oonf_api is not building with clang.
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#4583: cpp11: clang doesn't allow `mutex_t` to be used with `constexpr`
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All cpp11-* tests fail with clang.
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other issues
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------------
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#2761: core: define default flags
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If a thread is created without the corresponding flag (CREATE_STACKTEST),
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the ps command will yield wrong numbers for the stack usage
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#2927: core: Automatically select the lowest possible LPM mode
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Not all available low power modes (LPMs) are implemented for each platform and the
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concept of how the LPM is chosen needs some reconsideration
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#2967: Makefile.features: location is not relevant for all features
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Provided features for the build system should be split up into a board and cpu specific
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part
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#3109: periph/random: random_read should return unsigned int
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The documentation of this function does not match corresponding implementation.
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#4488: Making the newlib thread-safe
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When calling puts/printf after thread_create(), the CPU hangs for DMA enabled uart drivers.
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Special Thanks
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--------------
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We like to give our special thanks to all the companies that provided us with their hardware
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for porting and testing, namely the people from (in alphabetical order):
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Atmel, Freescale, Limifrog, Phytec, SiLabs, and Zolertia; and also companies that directly
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sponsored development time:
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Cisco Systems, Google, Eistec, Ell-i, Engineering Spirit, FreshTemp LLC, and Phytec.
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More information
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================
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http://www.riot-os.org
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Mailing lists
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-------------
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* RIOT OS kernel developers list
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* devel@riot-os.org (http://lists.riot-os.org/mailman/listinfo/devel)
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* RIOT OS users list
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* users@riot-os.org (http://lists.riot-os.org/mailman/listinfo/users)
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* RIOT commits
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* commits@riot-os.org (http://lists.riot-os.org/mailman/listinfo/commits)
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* Github notifications
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* notifications@riot-os.org (http://lists.riot-os.org/mailman/listinfo/notifications)
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IRC
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-----
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* Join the RIOT IRC channel at: irc.freenode.net, #riot-os
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License
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=======
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* Most of the code developed by the RIOT community is licensed under the
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GNU Lesser General Public License (LGPL) version 2.1 as published by the Free Software Foundation.
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* Some external sources are published under a separate, LGPL compatible license
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(e.g. some files developed by SICS).
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All code files contain licensing information.
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RIOT-2015.09 - Release Notes
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============================
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RIOT is a real-time multi-threading operating system that supports a range of

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