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release-notes.txt
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RIOT-2016.04 - Release Notes
============================
RIOT is a real-time multi-threading operating system that supports a range of
devices that are typically found in the Internet of Things: 8-bit
microcontrollers, 16-bit microcontrollers and light-weight 32-bit processors.
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)
and is licensed with a non-viral copyleft license (LGPLv2.1), which allows
indirect business models around the free open-source software platform
provided by RIOT.
About this release:
===================
This release adds support for two additional network stacks: lwIP and emb6.
A bunch of additional protocols are now available, P2P-RPL in the GNRC
network stack, Ethernet-over-Serial (ethos). Murdock, the new, blazing fast
RIOT CI is now available to significantly speed up code merging procedures.
This release also adds support for a number of new boards and sensors and a new
tool for automated border router setup is now provided which greatly simplifies
that setup for newbies as well as for old-timers. Last but not least: this
release includes a number of bug fixes, mostly about stabilizing and enhancing
the networking capabilities of RIOT.
About 470 pull requests with about 1196 commits have been merged since the last
release and 127 additional issues have been solved. 55 people contributed code
in 124 days. 1521 files have been touched with ~91700 insertions and ~42200
deletions.
Notations used below:
=====================
+ means new feature/item
* means modified feature/item
- means removed feature/item
New features and changes
========================
General
----------
+ added Makefile support for creating a "binary distribution", making it easier to create closed source applications while still complying to LGPL
Testing
---
+ Murdock, the new RIOT CI
+ unified pexpect code
+ added various new unittests and test applications
Core
----
+ added thread flags, a new method to signal events in an efficient and thread safe manner
+ messaging is now compile-time optional, shaving off some bytes off each thread's state struct for projects not requiring it
+ new, simpler list implementation increases mutex and msg performance
Network Stack
---
+ P2P-RPL (RFC6997)
+ netdev2_test: test framework for users of the netdev2 API
Packages
---
+ emb6 network stack
+ jsmn (minimal JSON parser)
+ lwIP network stack
+ unified and streamlined git package source handling
+ added support for caching git repositories
Platforms
---
+ reworked existing peripheral drivers and added SPI driver for arduino-mega2560
+ added support for nRF52dk
+ added support for nucleo-f072 and nucleo-f103
+ unified LED macros for all boards
Drivers
---
+ ethos "ethernet over serial" driver, enabling shared uart + network communication over one serial connection
+ RHOM BH1750FVI ambient light sensor
+ ST LIS3MDL three-axis magnetic sensor
+ Silicon Labs Si70xx low-power temperature + humidity sensor
+ simplified GPIO driver interface
+ AES encryption for xbee radio driver
+ added ADC mapping to SAUL
Sytem libraries
---
- vtimer support was dropped completely and removed
Build System
---
+ made build system safe for concurrent building of multiple applications
+ desvirt integration into the RIOT build system
Other
---
- simplified border router setup tool (single UART and automation script)
API changes
---
* at86rf2xx was moved from gnrc_netdev to the netdev2 API
* genrand_* -> random_*
* xtimer_remove() no longer returns whether a timer was actually removed
* disableIRQ(), enableIRQ(), restoreIRQ(), inISR() -> irq_disable(), irq_enable(), irq_restore(), irq_is_in()
* renamed periph/random to periph/hwrng
Fixed Issues from the last release
==================================
* #3109: periph/random: random_read should return unsigned int
* #3970: RPL: Advertise DODAG only over the assigned interface
* #4462: IPHC/NHC broken between Linux and a RIOT node with a RIOT-based border router in between.
* #4608: tests/xtimer_usleep_until: unstable behaviour
Known Issues
==========
----------------------
* #3075: nhdp: unnecessary microsecond precision
NHDP works with timer values of microsecond precision which is not required. Changing
to lower precision would save some memory.
* #3086: Max. packet length for AT86RF2XX
The size of the link-layer header is not dynamically calculated, but instead the maximum
size is always assumed.
* #4048: potential racey memory leak
According to the packet buffer stats, flood-pinging a multicast destination may lead to a
memory leak due to a race condition. However, it seems to be a rare case and a
completely filled up packet buffer was not observed.
* #5005: ndp: router advertisement sent with global address
Under some circumstances a router might send RAs with GUAs. While they are ignored
on receive (as RFC 4861 specifies), RAs should have link-local addresses and not even
be send out this way.
* #5007: gnrc icmpv6: Ping reply goes out the wrong interface
* #5055: cpuid: multiple radios will get same EUI-64
Nodes with multiple interfaces might get the same EUI-64 for them since they are generated
from the same CPU ID
* #5230: gnrc ipv6: multicast packets are not dispatched to the upper layers
* #5388: gnrc_sixlowpan_iphc_nhc: receiving NHC compressed UDP packets hits assert in IPv6
Fix already provided in #5281, but did not made it into the release due to its complexity
* #5390: pkg: OpenWSN does not compile
This package still uses deprecated modules and was not tested for a long time
native related issues
---------------------
* #495: native not float safe
When the FPU is used when an asynchronous context switch occurs, either the
stack gets corrupted or a floating point exception occurs.
* #534: native debugging on osx fails
Using valgrind or gdb with a nativenet target in OSX leads to "the network"
being stuck (gdb) or the whole process being stuck (valgrind).
* #3341 and #3824: nativenet crashes when hammered
Flood-pinging a native instance from more than one host (either multiple threads on the
host system or multiple other native instances), leads to a SEGFAULT
other platform related issues
-----------------------------
* #4560: make: clang is more pedantic than gcc
oonf_api is not building with clang.
* #4583: cpp11: clang doesn't allow `mutex_t` to be used with `constexpr`
All cpp11-* tests fail with clang.
* #4866: not all GPIO driver implementations are thread safe
Due to non-atomic operations in the drivers some pin configurations might get lost
other issues
------------
* #1263: TLSF implementation contains (a) read-before-write error(s)
* #2761: core: define default flags
If a thread is created without the corresponding flag (CREATE_STACKTEST),
the ps command will yield wrong numbers for the stack usage
* #2927: core: Automatically select the lowest possible LPM mode
Not all available low power modes (LPMs) are implemented for each platform and the
concept of how the LPM is chosen needs some reconsideration
* #2967: Makefile.features: location is not relevant for all features
Provided features for the build system should be split up into a board and cpu specific
part
* #4488: Making the newlib thread-safe
When calling puts/printf after thread_create(), the CPU hangs for DMA enabled uart drivers.
* #4841: xtimer: timer already in the list
Under some conditions an xtimer can end up twice in the internal list of the xtimer module.
* #5338: xtimer: xtimer_now() not ISR safe
For non-32-bit platforms
Special Thanks
===============
We like to give our special thanks to all the companies that provided us with
their hardware for porting and testing, namely the people from (in alphabetical
order): Atmel, Freescale, Limifrog, Nordic, OpenMote, Phytec, SiLabs, UDOO,
and Zolertia; and also companies that directly sponsored development time:
Cisco Systems, Eistec, Ell-i, Enigeering Spirit, FreshTemp LLC, and Phytec.
More information
================
http://www.riot-os.org
Mailing lists
-------------
* RIOT OS kernel developers list
* [email protected] (http://lists.riot-os.org/mailman/listinfo/devel)
* RIOT OS users list
* [email protected] (http://lists.riot-os.org/mailman/listinfo/users)
* RIOT commits
* [email protected] (http://lists.riot-os.org/mailman/listinfo/commits)
* Github notifications
* [email protected] (http://lists.riot-os.org/mailman/listinfo/notifications)
IRC
-----
* Join the RIOT IRC channel at: irc.freenode.net, #riot-os
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 are published under a separate, LGPL compatible license
(e.g. some files developed by SICS).
All code files contain licensing information.
RIOT-2015.12 - Release Notes
============================
RIOT is a real-time multi-threading operating system that supports a range of
devices that are typically found in the Internet of Things: 8-bit
microcontrollers, 16-bit microcontrollers and light-weight 32-bit processors.
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).
About this release:
===================
This release is mostly a clean-up and bug-fixing release. Besides that, it introduces SAUL,
the [S]ensor [A]ctuator [U]ber [L]ayer, which offers a unified API to interact with all
different types of sensors and actuators on RIOT supported hardware. Furthermore, it re-enables
the support for ICN by integrating CCN-Lite as a package. A lot of new overall documentation was
added and existing documentation was improved (http://riot-os.org/api/). In addition,
a Vagrant (https://www.vagrantup.com/) configuration file was added to the RIOT repository in
order to create reproducible and portable environments that contain all necessary toolchains.
About 222 pull requests with about 631 commits have been merged since the last release and 48
additional issues have been solved. 37 people contributed code in 102 days. 980 files have been
touched with ~59779 insertions and ~12115 deletions.
Notations used below:
=====================
+ means new feature/item
* means modified feature/item
- means removed feature/item
New features and changes
========================
General
-------
Device support
--------------
+ SAUL [S]ensor [A]ctuator [U]ber [L]ayer
Core
----
* replaced deprecated dINT()/eINT() calls by up-to-date disableIRQ()/enableIRQ()/restoreIRQ()
calls throughout the whole core
Network Stack
-------------
+ TFTP support
+ 6LoWPAN: Next Header Compression
+ leaf mode for RPL nodes
* RPL: refactoring of instances and dodags (saved 1kB ROM and 0,5kB RAM)
* FIB: initial source route support
* change to non-blocking 6LoWPAN fragmentation
* POSIX sockets: various fixes
* periodic stats printing for ping6 command
* convert all vtimer into xtimer calls
* send router advertisements without PIOs
Packages
--------
+ CCN-Lite as a ICN network stack
+ RELIC: efficient cryptography library
* fix TLSF to compile with -pedantic
Supported platforms
-------------------
Additional support for the following boards:
+ weio board with NXP LPC11U34 (ARM Cortex-M0)
+ Silicon Labs Wireless Eval Kit SLWSTK6220A (Wonder Gecko)
+ STM32 Nucleo-F401
Drivers
-------
+ Arduino-mega2560 GPIO
+ Arduino pin mapping for Mega2560 and Due
Network drivers
---------------
+ enc28j60 Ethernet chip
+ at86rf2xx: Add support for channel page
* at86rf2xx: fix LQI reading
* implement sleep mode for at86rf2xx
Sensors drivers
---------------
+ AT30TSE75x temperature sensor
+ TCS3772 Color Light-to-Digital converter
System libraries
----------------
+ partial support for the Arduino API
+ lightweight semaphores
+ fmt: simple string formatting library
+ xtimer: 32-bit version of msg_recv_timeout
* implicit socket binding for POSIX connect() and sendto()
* posix_semaphore: make API POSIX compliant
Examples
--------
+ microcoap/conn example
+ minimal GNRC networking example
Build System
------------
* split the Cortex-M0 buildtest group to avoid timeout issues with Travis
* split the Cortex-M4 buildtest group to avoid timeout issues with Travis
Other
-----
+ vagrant configuration
+ documentation: various high-level descriptions of crucial features
+ IoT-LAB: create and connect to debug server
* pyterm: fix problems with German umlauts as input
Fixed Issues from the last release
==================================
#2724: Add support for serial number passing to CMSIS boards, document it
Documentation about how to discover and set the serial number of CMSIS-DAP chips is missing
#3201: Odd length packet snips cause invalid check sum
If an odd length packet snip occurs in a packet and is not the last snip
(in the order the packet is supposed to be, not in the list's order)
in a packet it will generate a wrong check sum.
Known Issues
============
network related issues
----------------------
#3075: nhdp: unnecessary microsecond precision
NHDP works with timer values of microsecond precision which is not required. Changing
to lower precision would save some memory.
#3086: Max. packet length for AT86RF2XX
The size of the link-layer header is not dynamically calculated, but instead the maximum
size is always assumed.
#3970: RPL: Advertise DODAG only over the assigned interface
gnrc_rpl seems to multicast DIOs over all interfaces, though gnrc_rpl_init expects an
interface as parameter and sets the RPL-nodes multicast address only for that interface.
#4048: potential racey memory leak
According to the packet buffer stats, flood-pinging a multicast destination may lead to a
memory leak due to a race condition. However, it seems to be a rare case and a
completely filled up packet buffer was not observed.
#4462: IPHC/NHC broken between Linux and a RIOT node with a RIOT-based border router in between.
native related issues
---------------------
#495: native not float safe
When the FPU is used when an asynchronous context switch occurs, either the
stack gets corrupted or a floating point exception occurs.
#534: native debugging on osx fails
Using valgrind or gdb with a nativenet target in OSX leads to "the network"
being stuck (gdb) or the whole process being stuck (valgrind).
#3341 and #3824: nativenet crashes when hammered
Flood-pinging a native instance from more than one host (either multiple threads on the
host system or multiple other native instances), leads to a SEGFAULT.
#4608: tests/xtimer_usleep_until: unstable behaviour
The test starts to output "too large difference" and fails after a random period of time.
other platform related issues
-----------------------------
#4560: make: clang is more pedantic than gcc
oonf_api is not building with clang.
#4583: cpp11: clang doesn't allow `mutex_t` to be used with `constexpr`
All cpp11-* tests fail with clang.
other issues
------------
#2761: core: define default flags
If a thread is created without the corresponding flag (CREATE_STACKTEST),
the ps command will yield wrong numbers for the stack usage
#2927: core: Automatically select the lowest possible LPM mode
Not all available low power modes (LPMs) are implemented for each platform and the
concept of how the LPM is chosen needs some reconsideration
#2967: Makefile.features: location is not relevant for all features
Provided features for the build system should be split up into a board and cpu specific
part
#3109: periph/random: random_read should return unsigned int
The documentation of this function does not match corresponding implementation.
#4488: Making the newlib thread-safe
When calling puts/printf after thread_create(), the CPU hangs for DMA enabled uart drivers.
Special Thanks
--------------
We like to give our special thanks to all the companies that provided us with their hardware
for porting and testing, namely the people from (in alphabetical order):
Atmel, Freescale, Limifrog, Phytec, SiLabs, and Zolertia; and also companies that directly
sponsored development time:
Cisco Systems, Google, Eistec, Ell-i, Engineering Spirit, FreshTemp LLC, and Phytec.
More information
================
http://www.riot-os.org
Mailing lists
-------------
* RIOT OS kernel developers list
* [email protected] (http://lists.riot-os.org/mailman/listinfo/devel)
* RIOT OS users list
* [email protected] (http://lists.riot-os.org/mailman/listinfo/users)
* RIOT commits
* [email protected] (http://lists.riot-os.org/mailman/listinfo/commits)
* Github notifications
* [email protected] (http://lists.riot-os.org/mailman/listinfo/notifications)
IRC
-----
* Join the RIOT IRC channel at: irc.freenode.net, #riot-os
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 are published under a separate, LGPL compatible license
(e.g. some files developed by SICS).
All code files contain licensing information.
RIOT-2015.09 - Release Notes
============================
RIOT is a real-time multi-threading operating system that supports a range of
devices that are typically found in the Internet of Things: devices based on
8-bit microcontrollers, 16-bit microcontrollers and light-weight 32-bit
processors.
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).
About this release:
============
This release introduces the GNRC network stack, a completely new, highly
modularized and configurable IPv6/6LoWPAN stack. It also includes xtimer as a
new timer subsystem for accurate short- and long-term timers. Moreover,
peripheral drivers, board, and CPU support has been tidied up and contains
about 50% less duplication in the build system.
About 580 pull requests with about 2,500 commits have been merged since the
last release and 120 additional issues have been solved. 62 people contributed
code in 278 days. 2578 files have been touched with ~320,000 insertions and
~134,000 deletions.
Loose notations used below:
============
+ means new feature/item
* means modified feature/item
- means removed feature/item
New features
============
General
-------
+ complete codebase now compiles with -Werror on all platforms
Device support
--------------
+ vastly improved hardware abstraction, unified over all devices
+ unified most common code
* complete refactoring of MSP430 and ARM7 code
Core
----
+ new timer subsystem: xtimer
+ extended atomic API by compare-and-swap, increase/decrease and
set-to-one/set-to-zero functions
+ introduced a more energy-saving assert macro
Network Stack
-------------
+ RFC compliant gnrc network stack (6LoWPAN, IPv6, UDP, RPL) major refactoring
+ 6LoWPAN ND (including SLAAC)
+ example applications working out of the box (gnrc_networking for the full
gnrc experience, gnrc_border_router for a 6LoWPAN border router, and default
for simple link layer connectivity)
+ explicit support for border router
+ auto-init for the network stack
+ introduction of generic interfaces (netdev, netapi)
+ introduction of a protocol-independent FIB
+ introduction of a central packet buffer
+ wireshark-supported protocol ZEP to send IEEE 802.15.4 frames over UDP on
non-IEEE-802.15.4 devices
+ support for SLIP and link-layers without addresses
+ new low-level driver model
+ new nativenet based directly on ethernet
+ conn: general stack-independent transport layer API
+ POSIX sockets ported for conn
+ NHDP support
Packages
--------
+ support for microCoAP
+ CMSIS DSP
Supported platforms
-------------------
Additional support for the following boards:
+ Zolertia ReMote
+ Atmel SAML21 Xplained Pro (saml21-xpro)
+ ST Nucleo L1
+ ST Nucleo F334
+ ST Nucleo F091
+ Phytec phyWAVE KW22
+ Eistec Mulle
+ Freescale Freedom FRDM-K64F
+ TI Stellaris Launchpad LM4F120
+ LimiFrog V1
+ Silabs EZR32WG
Drivers
-------
+ various peripheral drivers (ADC, UART, timer, SPI, I²C, RTC, RTT, DAC, PWM...)
+ basic NVRAM driver (interface)
Network drivers
+ native ethernet driver
+ ENCx24J600 ethernet driver
Sensors drivers
+ ISL29125 RGB light sensor
+ PDC8544 LCD display
+ INA220 current and power monitor
+ MPU-9150 9-DOF motion sensor
+ LIS3DH accelerometer
+ TMP006 temperature sensor
+ MAG3110 magnetometer
+ MMA8652 accelerometer
+ DHT11/DHT22 temperature-humidity sensor
+ ADT7310 temperature sensor
System libraries
----------------
+ MD5
+ Fletcher's checksum
+ Unified Cipher API and Block cipher operation modes: ECB, CBC, CTR and CCM
+ Bitfield operations
+ thread safe ringbuffer
+ vtimer compatibility layer
Build System
------------
+ support for the FIT IoT-LAB testbed by direct integration into the Make build
system
+ integrated Docker support
+ integration of llvm's clang static analyzer
+ added target for the address sanitizer
+ indicating possible feature conflicts at compile time
+ unified OpenOCD script
Changes
=======
Core
----
* improved documentation
* fixed several IPC message queue initializations
- removed hwtimer
Drivers
-------
* optimized/remodeled GPIO interface
* optimized/remodeled TIMER interface
- temporarily removed CC2420 driver (awaiting last bug fixes for a rewrite)
* re-implementation of the CC110x driver against the peripheral interface
Network Stack
-------------
* temporarily removed and currently being refactored:
- TCP support
- CCN-lite
- AODVv2
System libraries
----------------
* new high level UART/stdio interface
* better modularisation of POSIX wrapper modules
- removed skipjack crypto library
Packages
--------
* updated CMSIS HAL to version 4.3
Other
-----
* clean-up of deprecated system and network libraries
* clean-up of deprecated boards and drivers
Selected Issues Fixed since the Last Release
============================================
#21: Deal with stdin in bordermultiplex.c
A completely new border router implementation is in place
#715: test_hwtimer_wait fails on native
Fixed by @benoit-canet in #2870
#861: neighbor discovery for 6LoWPAN not working
GNRC implements 6LoWPAN ND in a RFC6775 compliant way
#1753: vtimer_msg test crashes after ~49'20" and
#1449: a removed vtimer might still get called back by hwtimer
vtimer has been replaced by xtimer which does not have these issues
#1870: IPv6 neighbor advertisements are malformed
According to Wireshark (and reference implementations) GNRC sends
well-formed neighbor advertisements
#1964 and #1955: eventual problems with IoT-LAB M3 nodes in the testbed
Solved by new driver versions for UART and radio
#2228: samd21 stack sizes are too small
The stacksize has been adapted in #2229
Known Issues
============
network related issues
----------------------
#3075: nhdp: unnecessary microsecond precision
NHDP works with timer values of microsecond precision which is not
required. Changing to lower precision would save some memory.
#3086: Max. packet length for AT86RF2XX
The size of the link-layer header is not dynamically calculated, but
instead the maximum# size is always assumed.
#3201: Odd length packet snips cause invalid check sum
If an odd length packet snip occurs in a packet and is not the last snip
(in the order the packet is supposed to be, not in the list's order) in a
packet it will generate a wrong check sum.
#4048: potential racey memory leak
According to the packet buffer stats, flood-pinging a multicast destination
may lead to a memory leak due to a race condition. However, it seems to be
a rare case and a completely filled up packet buffer was not observed.
native related issues
---------------------
#495: native not float safe
When the FPU is used when an asynchronous context switch occurs, either the
stack gets corrupted or a floating point exception occurs.
#499: native is segfaulting on heavy network usage
Sending more than 100 packets per second causes a SEGFAULT in RIOT native.
#534: native debugging on osx fails
Using valgrind or gdb with a nativenet target in OSX leads to "the network"
being stuck (gdb) or the whole process being stuck (valgrind).
#3341 and #3824: nativenet crashes when hammered
Flood-pinging a native instance from more than one host (either multiple
threads on the host system or multiple other native instances), leads to a
SEGFAULT.
other platform related issues
-----------------------------
#2724: Add support for serial number passing to CMSIS boards, document it
Documentation about how to discover and set the serial number of CMSIS-DAP
chips is missing
other issues
------------
#2761: core: define default flags
If a thread is created without the corresponding flag (CREATE_STACKTEST),
the ps command will yield wrong numbers for the stack usage
#2927: core: Automatically select the lowest possible LPM mode
Not all available low power modes (LPMs) are implemented for each platform
and the concept of how the LPM is chosen need some reconsideration
#2967: Makefile.features: location is not relevant for all features
Provided features for the build system should be split up into a board and
cpu specific part
#3109: periph/random: random_read should return unsigned int
The documentation of this function does not match corresponding
implementation.
Special Thanks
--------------------
We like to give our special thanks to all the companies that provided us with
their hardware for porting and testing, namely the people from (in alphabetical
order): Atmel, Freescale, Limifrog, Phytec, SiLabs, and Zolertia; and also
companies that directly sponsored development time: Cisco Systems, Eistec,
Ell-i, FreshTemp LLC, and Phytec.
More information
================
http://www.riot-os.org
Mailing lists
-------------
* RIOT OS kernel developers list
* [email protected] (http://lists.riot-os.org/mailman/listinfo/devel)
* RIOT OS users list
* [email protected] (http://lists.riot-os.org/mailman/listinfo/users)
* RIOT commits
* [email protected] (http://lists.riot-os.org/mailman/listinfo/commits)
* Github notifications
* [email protected] (http://lists.riot-os.org/mailman/listinfo/notifications)
IRC
-----
* Join the RIOT IRC channel at: irc.freenode.net, #riot-os
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 are published under a separate, LGPL compatible license
(e.g. some files developed by SICS).
All code files contain licensing information.
RIOT-2014.12 - Release Notes
============================
RIOT is a real-time multi-threading operating system that supports a range of
devices that are typically found in the Internet of Things: from 8-bit
microcontrollers to light-weight 32-bit processors.
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).
New features
============
Core
----
+ introduced new thread_yield() and renamed the old implementation to thread_yield_higher()
Supported platforms
-------------------
Additional support for the following boards:
+ Arduino Mega 2560 (first-time support of an 8-bit platform)
+ HikoB Fox
+ Atmel samr21-Xplained Pro
+ OpenMote
+ cc2538 Developer Kit
+ Spark-Core
+ f4vi1
+ Airfy-Beacon
+ STMF0Discovery Board
+ STMF3Discovery Board
+ STMF4Discovery Board
+ nrf51822 Development Kit
+ yunjia-nrf51822
+ MSB-IoT
+ native on ARM platforms
Drivers
-------
+ various peripheral drivers (ADC, UART, timer, SPI, I²C, RTC, RTT, DAC, PWM...)
+ MQ-3 alcohol sensor
+ ISL29020 light sensor
+ LPS331AP pressure sensor
+ LSM303DLHC accelerometer
+ L3G4200D gyroscope
+ servo motor
+ TI HDC 1000 low power humidity and temperature digital sensor
+ SRF02/SRF08 ultrasonic range sensors
+ PIR motion sensor
+ RGB LED
Network Stack
---------------
+ AODVv2
+ RPL non-storing mode
+ OF manager for RPL
+ Source Routing Header support
+ introduced netapi
+ introduced netdev, a general interface for network device drivers
+ introduced global packet buffer
System libraries
----------------
+ CBOR
+ UBJSON
+ color module for PWM
Packages
--------
+ libfixmath
Other
-----
+ C++ support for most platforms
+ PCAP based wireless sniffer
Changes
=======
Core
----
* PIDs begin with 1
* mamximum 16 priority levels for every platform
* fixed sched_switch()
* simplified mutex signatures
* minimized size of TCB
* allow hwtimer to run with more than 1MHz
* imported ringbuffer from sys
Supported platforms
-------------------
* improved iotlab-m3 support
* major improvements on the mbed LPC1768
* improved at86rf231 radio driver
* fixed hwtimer for MSP430
* added support for timer B for MSP430
* fixed thread_yield() for MSP430
* several fixes for the cc2420
* improved interrupt handling on ARM
* adjusted stack sizes for Cortex platforms
Network Stack
---------------
* refactored CCN-lite
* refactored RPL
* renamed destiny to transport_layer and socket_base
* several fixes for TCP
* split UDP and TCP
System libraries
----------------
- removed hashtable implementation
Packages
--------
* updated and simplified OpenWSN
Other
-----
* Improved and cleaned up build system
* various new helper targets (like debug, distclean, reset, objdump...)
* use newlib's nano specs if available
* various new features and added Python 3 compatibility for pyterm
* major reduction of warnings in doxygen and improved html layout
Fixed Issues from the last release
==================================
#426: Interrupt handling on MSP430 is buggy
Several fixes by @rousselk
#1798: core: first thread on runqueue is scheduled twice
Was fixed along with the thread_yield() refactoring
#1127: Random build fails on OSX
native is building stable also on OSX now
Known Issues
============
network related issues
----------------------
#21: Deal with stdin in bordermultiplex.c
Not all supported platforms provide a stdin in the current release.
However, the implementation of the 6LoWPAN border router won't work
without stdin.
#861: neighbor discovery for 6LoWPAN not working
Duplicate address detection according to RFC 6775 is also missing.
#1577: ccn-lite: populate does not work with disabled cache
If cache is set to zero, the chunks cannot be loaded and therefore also not get populated.
#1870: IPv6 neighbor advertisements are malformed
According to Wireshark, ICMPv6 neighbor advertisements are malformed (wrong
checksum or other reasons).
native related issues
---------------------
#495: native not float safe
When the FPU is used when an asynchronous context switch occurs, either the
stack gets corrupted or a floating point exception occurs.
#499: native is segfaulting on heavy network usage
Sending more than 100 packets per second causes a SEGFAULT in RIOT native.
#534: native debugging on osx fails
Using valgrind or gdb with a nativenet target in OSX leads to "the network"
being stuck (gdb) or the whole process being stuck (valgrind).
#715: test_hwtimer_wait fails on native
The problem appears to be lost signals and depends on the CPU speed.
#787: reboot not working with open file descriptors on native
If for example a tap device is in use, the reboot command fails.
#862: sometimes the tap bridge does not work in native
Sometimes (rather suddenly) packages are not received by a TAP and won't be
received even if I reconfigure the bridge.
other platform related issues
-----------------------------
#1232: x86 doesn't build on OS X with clang
Current version of the x86 port doesn't build for OS X with clang.
#1442: setting channel is not persistent cc2420
After changing the channel via a shell command, the channel reverts back to an arbitrary
value. However, this might be only a shell problem.
#1753: vtimer_msg test crashes after ~49'20"
dependent on the platform, vtimer stops working after some time.
#1891: printf formatting does not work properly on some Cortex platforms for 64 bit numbers
This problem happens mostly for the Newlib nano, which does not support 64 bit integer
printing, but sometimes happens also with other toolchains.
#1964 and #1955: eventual problems with IoT-LAB M3 nodes in the testbed
The shell is sometimes not properly working after a reboot and the PDR is sometimes
worse than expected.
#2143: tests.core doesn't compile for all platforms
For some missing GCC compiler builtins, the unittests do not compile for MSP430
platforms.
#2228: samd21 stack sizes are too small
The application examples/default for example will crash when issuing the txtsnd command
other issues:
--------------
#1449: a removed vtimer might still get called back by hwtimer
The timer callback might still fire even after vtimer_remove() was called.
#2175: valgrind registeres "Invalid write of size 4" in unittests for ubjson
According to valgrind the stack gets corrupted in UBJSON.
For all issues and open pull requests please check the RIOT issue tracker:
https://github.com/RIOT-OS/RIOT/issues
Special Thanks
--------------------
We like to give our special thanks to all the companies that provided us with their hardware for porting and testing, namely the people from (in alphabetical order): airfy, Atmel, ELL-i, Intel, IoT-Lab, mbed, Phytec, and Udoo
More information
================
http://www.riot-os.org
Mailing lists
-------------
* RIOT OS kernel developers list
* [email protected] (http://lists.riot-os.org/mailman/listinfo/devel)
* RIOT OS users list
* [email protected] (http://lists.riot-os.org/mailman/listinfo/users)
* RIOT commits
* [email protected] (http://lists.riot-os.org/mailman/listinfo/commits)
* Github notifications
* [email protected] (http://lists.riot-os.org/mailman/listinfo/notifications)
License
=======
* All sources and binaries that have been developed at Freie Universität Berlin
and most of the other code are licensed under the GNU Lesser General Public
License version 2 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.
RIOT-2014.05 - Release Notes
============================
RIOT is a real-time multi-threading operating system that supports a range of
devices that are typically found in the Internet of Things: from 16-bit
microcontrollers to light-weight 32-bit processors.
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).
New features
============
Core
----
+ introduced explicit core/cpu interface through a set of header files
+ added reboot and panic functions
+ added a node name to the sysconfig struct
+ added the ability to send a message to the current thread's message queue
Supported platforms
-------------------
Additional support for the following boards:
+ Arduino Due
+ UDOO board
+ X86 via qemu