.. _zephyr_1.5:

Zephyr Kernel 1.5.0
####################

The Zephyr Engineering team is glad to announce the release of Zephyr Kernel
1.5.0. This is the first release to follow the 3-month release cadence.
This release includes numerous fixes and support for major features.
Additional changes include support for new drivers, sensors, and boards.

Major enhancements included with the release:

- TCP Support
- Integration of the Paho MQTT Library support with QoS
- Flash Filesystem Support
- Integration of the mbedTLS library for encryption
- Improved BR/EDR support (for L2CAP, in particular).
- Support for the Altera Nios II/f soft CPU architecture

A detailed list of changes since v1.4.0 by component follows:

Kernel
******

- Added nano_fifo_put_list() APIs, which allows queuing  a list of elements
  on a nanokernel FIFO.
- Removed unused memory pool structure field.
- Enhanced memory pool code.

Architectures
*************

- ARM: Updated to include floating point registers.
- Altera Nios II/f soft CPU architecture support
   -  Internal Interrupt Controller
   -  Avalon Timer
   -  Avalon JTAG UART (polling mode) as default for qemu-system-nios2,
      and 16550 UART as default for Altera MAX10.

Boards
******

- Added Nios II QEMU board.
- Added configuration for Altera MAX10 FPGA.

Drivers and Sensors
*******************

- Sensors: Added driver for I2C HMC5883L magnetometer.
- Sensors: Added driver for I2C TMP112 temperature sensor.
- Sensors: Added driver for MAX44009 light sensor.
- Sensors: Added driver for LPS25HB.
- HAL: Updated QMSI drivers to 1.1
- Added DMA QMSI shim driver.
- Added Quark SE USB device controller driver.
- Added suspend/resume to QMSI drivers.
- Added Guard for critical sections of the QMSI drivers.
- Added Zephyr File System API.
- Added driver for ENC28J60 Ethernet SPI module.

Networking
**********

- TCP Support
- Connection handling fixes in IP stack.
- Allow sending zero length user data IP packet.

Network Buffers

- New net_buf_simple API for light-weight on-stack (or static) buffers where a
  net_buf (and its associated pool) is overkill. The net_buf API now uses as
  an internal implementation detail net_buf_simple.
- Add support for network buffer fragmentation.
- Add more net_buf big endian helpers.

Bluetooth
*********

- Multiple fixes & improvements to the nble driver.
- New API for dealing with Out of Band data (like the local address).
- Various smaller fixes & improvements in many places.

Build and Infrastructure
************************

- Added "qemugdb" target to start a local GDB on port 1234.
- Added script to filter known issues in the build output.
- Sanity: Added "-R" option to build all test with assertions.

Libraries
*********

- File system: Imported Open Source FAT FS 0.12a code.
- Encryption: Imported mbedTLS library.
- Encryption: Updated TinyCrypt library to 2.0.

Documentation
*************

- Fixed all the documentations warnings during build.
- Fixed several typos, trademarks and grammar.
- Moved all the boards documentation to the wiki.
- Moved Code Contribution documentation to the wiki.
- Added package "ncurses" to the list of requirements.
- Updated macOS instructions.

Test and Samples
****************

- Samples: Replaced old debug macro to use new SYS_LOG macro.
- Added TMP112 sensor application.
- Added Quark SE power management sample application.
- Added DMA memory to memory transfer sample.
- Added sample for MAX44009 light sensor.
- Added MQTT publisher and subscriber samples.
- Added mbedTLS sample client.

JIRA Related Items
******************


Stories
========

* ``ZEP-49`` - x86: unify separate SysV and IAMCU code
* ``ZEP-55`` - enable nanokernel test_context on ARC
* ``ZEP-58`` - investigate use of -fomit-frame-pointer
* ``ZEP-60`` - irq priorities should be rebased to safe values
* ``ZEP-69`` - Extend PWM API to use arbitrary unit of time
* ``ZEP-203`` - clean up APIs for static exceptions
* ``ZEP-225`` - Add kernel API to put SoC to Deep Sleep (DS) State
* ``ZEP-226`` - Update sample PMA to support device suspend/resume
* ``ZEP-227`` - Add kernel API to put SoC to Low Power State (LPS)
* ``ZEP-228`` - File system interface designed after POSIX
* ``ZEP-232`` - Support for USB communications device class ACM
* ``ZEP-234`` - provide a direct memory access (DMA) interface
* ``ZEP-243`` - Create Wiki Structure for Boards
* ``ZEP-249`` - nios2: Enable altera_max10 board in sanitycheck runs for nanokernel
* ``ZEP-254`` - nios2: define NANO_ESF struct and populate _default_esf
* ``ZEP-270`` - nios2: determine optimal value for PERFOPT_ALIGN
* ``ZEP-271`` - nios2: enable microkernel & test cases
* ``ZEP-272`` - nios2: add global pointer support
* ``ZEP-273`` - nios2: implement flashing scripts
* ``ZEP-274`` - nios2: document GDB debugging procedure
* ``ZEP-275`` - nios2: scope support for instruction/data caches
* ``ZEP-279`` - nios2: demonstrate nanokernel hello world
* ``ZEP-285`` - FAT filesystem support on top of SPI Flash
* ``ZEP-289`` - nios2: implement kernel_event_logger
* ``ZEP-291`` - Driver for the ENC28J60 ethernet device
* ``ZEP-304`` - Investigate QEMU support for Nios II
* ``ZEP-327`` - Encryption Libraries needed for Thread support
* ``ZEP-340`` - TLS/SSL
* ``ZEP-354`` - Provide a DMA driver for Quark SE core
* ``ZEP-356`` - DMA device support
* ``ZEP-357`` - Support for the MAX44009 sensor
* ``ZEP-358`` - Add support for TMP112 sensor
* ``ZEP-412`` - Add driver API reentrancy support to RTC driver for LMT
* ``ZEP-414`` - Add driver API reentrancy support to flash driver
* ``ZEP-415`` - aaU, I want to use the NATS messaging protocol to send sensor data to the cloud
* ``ZEP-416`` - MQTT client capability: QoS1, QoS2
* ``ZEP-424`` - AON counter driver needs to add driver API reentrancy support
* ``ZEP-430`` - Add driver API reentrancy support to PWM shim driver
* ``ZEP-434`` - Driver for HMC5883L magnetometer
* ``ZEP-440`` - Add driver API reentrancy support to WDT shim driver
* ``ZEP-441`` - Add driver API reentrancy support to GPIO shim drivers
* ``ZEP-489`` - nios2: handle unimplemented multiply/divide instructions
* ``ZEP-500`` - Domain Name System client library
* ``ZEP-506`` - nios2: support bare metal boot and XIP on Altera MAX10
* ``ZEP-511`` - Add Deep Sleep support in PMA
* ``ZEP-512`` - Add suspend/resume support for some core devices to enable Deep Sleep support in PMA
* ``ZEP-541`` - Integrate QMSI releases to Zephyr
* ``ZEP-567`` - netz sample code
* ``ZEP-568`` - MQTT QoS sample app
* ``ZEP-573`` - IoT applications must use netz API
* ``ZEP-590`` - Update Zephyr's TinyCrypt to version 2.0
* ``ZEP-643`` - Add file system API documentation
* ``ZEP-650`` - Quark SE: Implement PM reference application
* ``ZEP-652`` - QMSI shim driver: RTC: Implement suspend and resume callbacks
* ``ZEP-655`` - QMSI shim driver: PWM: Implement suspend and resume callbacks
* ``ZEP-658`` - QMSI shim driver: GPIO: Implement suspend and resume callbacks
* ``ZEP-659`` - QMSI shim driver: UART: Implement suspend and resume callbacks
* ``ZEP-662`` - QMSI shim driver: Pinmux: Implement suspend and resume callbacks

Epic
====

* ``ZEP-278`` - Enable Nios II CPU on Altera Max10
* ``ZEP-284`` - Flash Filesystem Support
* ``ZEP-305`` - Device Suspend / Resume infrastructure
* ``ZEP-306`` - PWM Enabling
* ``ZEP-406`` - Drivers shall be re-entrant

Bug
===

* ``ZEP-68`` - Final image contains duplicates of some routines
* ``ZEP-156`` - PWM Set Value API behaves incorrectly
* ``ZEP-158`` - PWM Set Duty Cycle API does not work
* ``ZEP-180`` - make menuconfig user provided options are ignored at building time
* ``ZEP-187`` - BLE APIs are not documented
* ``ZEP-218`` - [drivers/nble][PTS_TEST] Fix responding with the wrong error codes to the Prepare Write Request
* ``ZEP-221`` - [drivers/nble][PTS_TEST] Implement Execute Write Request handler
* ``ZEP-369`` - When building out of the tree, application object files are not placed into outdir
* ``ZEP-379`` - _k_command_stack may be improperly initialized when debugging
* ``ZEP-384`` - D2000 hangs after I2C communication with BMC150 sensor
* ``ZEP-401`` - PWM driver turns off pin if off time is 0 in set_values
* ``ZEP-423`` - Quark D2000 CRB documentation should include instructions to flash bootloader
* ``ZEP-435`` - Ethernet/IPv4/TCP: ip_buf_appdatalen returns wrong values
* ``ZEP-456` - doc: ``IDT security``` section disappeared
* ``ZEP-457`` - doc: contribute/doxygen/typedefs.rst: examples files are broken
* ``ZEP-459`` - doc: kconfig reference entries in HTML are lacking a title
* ``ZEP-460`` - doc: document parameters of DEVICE* macros
* ``ZEP-461`` - Release 1.4.0 has broken the BMI160 sample as well as an application based on it
* ``ZEP-463`` - Getting started guide "next" link doesn't take you to "Checking Out the Source Code Anonymously" section
* ``ZEP-469`` - Ethernet/IPv4/TCP: net_receive & net_reply in server mode
* ``ZEP-474`` - ND: Neighbor cache is not getting cleared
* ``ZEP-475`` - Issue with timer callback routine: Condition checked is incorrect
* ``ZEP-478`` - Linux setup docs missing step to install curses development package for Fedora
* ``ZEP-497`` - Ethernet/IPv4/TCP: failed to get free buffer
* ``ZEP-499`` - TMP007 driver returns invalid values for negative temperature
* ``ZEP-514`` - memory corruption in microkernel memory pool defrag()
* ``ZEP-516`` - Ubuntu setup instructions missing 'upgrade' step
* ``ZEP-518`` - SPI not working on Arduino101
* ``ZEP-522`` - TCP/client-mode: disconnect
* ``ZEP-523`` - FIFOs defined by DEFINE_FIFO macro use the same memory buffer
* ``ZEP-525`` - srctree changes are breaking applications
* ``ZEP-526`` - build "kernel event logger" sample app failed for BOARD=quark_d2000_crb
* ``ZEP-534`` - Scan for consistent use of "platform/board/SoC" in documentation
* ``ZEP-537`` - doc: create external wiki page "Maintainers"
* ``ZEP-545`` - Wrong default value of CONFIG_ADC_QMSI_SAMPLE_WIDTH for x86 QMSI ADC
* ``ZEP-547`` - [nble] Failed to start encryption after reconnection
* ``ZEP-554`` - samples/drivers/aon_counter check README file
* ``ZEP-555`` - correct libgcc not getting linked for CONFIG_FLOAT=y on ARM
* ``ZEP-556`` - System hangs during I2C transfer
* ``ZEP-565`` - Ethernet/IPv4/TCP: last commits are breaking network support
* ``ZEP-571`` - ARC kernel BAT failed due to race in nested interrupts
* ``ZEP-572`` - X86 kernel BAT failed: Kernel Allocation Failure!
* ``ZEP-575`` - Ethernet/IPv4/UDP: ip_buf_appdatalen returns wrong values
* ``ZEP-595`` - UART: usb simulated uart doesn't work in poll mode
* ``ZEP-598`` - CoAP Link format filtering is not supported
* ``ZEP-611`` - Links on downloads page are not named consistently
* ``ZEP-616`` - OS X setup instructions not working on El Capitan
* ``ZEP-617`` - MQTT samples build fail because netz.h file missing.
* ``ZEP-621`` - samples/static_lib: fatal error: stdio.h: No such file or directory
* ``ZEP-623`` - MQTT sample mqtt.h missing "mqtt_unsubscribe" function
* ``ZEP-632`` - MQTT fail to re-connect to the broker.
* ``ZEP-633`` - samples/usb/cdc_acm: undefined reference to 'uart_qmsi_pm_save_config'
* ``ZEP-642`` - Inconsistent interpretation of pwm_pin_set_values arguments among drivers
* ``ZEP-645`` - ARC QMSI ADC shim driver fails to read sample data
* ``ZEP-646`` - I2C fail to read GY2561 sensor when GY2561 & GY271 sensor are attached to I2C bus.
* ``ZEP-647`` - Power management state storage should use GPS1 instead of GPS0
* ``ZEP-669`` - MQTT fail to pingreq if broker deliver topic to client but client doesn't read it.
* ``ZEP-673`` - Sanity crashes and doesn't kill qemu upon timeout
* ``ZEP-679`` - HMC5883L I2C Register Read Order
* ``ZEP-681`` - MQTT client sample throws too many warnings when build.
* ``ZEP-687`` - docs: Subsystems/Networking section is almost empty
* ``ZEP-689`` - Builds on em_starterkit fail
* ``ZEP-695`` - FatFs doesn't compile using Newlib
* ``ZEP-697`` - samples/net/test_15_4 cannot be built by sanitycheck
* ``ZEP-703`` - USB sample apps are broken after QMSI update
* ``ZEP-704`` - test_atomic does not complete on ARC
* ``ZEP-708`` - tests/kernel/test_ipm fails on Arduino 101
* ``ZEP-739`` - warnings when building samples for quark_se devboard

Known issues
============

* ``ZEP-517`` - build on windows failed "zephyr/Makefile:869: \*\*\* multiple target patterns"
   - No workaround, will fix in future release.

* ``ZEP-711`` - I2c: fails to write with mode fast plus
   - No workaround need it, there is no support for high speed mode.

* ``ZEP-724`` - build on windows failed: 'make: execvp: uname: File or path name too long'
   - No workaround, will fix in future release.

* ``ZEP-467`` - Hang using UART and console.
   - No workaround, will fix in future release.

* ``ZEP-599`` - Periodic call-back function for periodic REST resources is not getting invoked
   - No workaround, will fix in future release.

* ``ZEP-471`` - Ethernet packet with multicast address is not working
   - No workaround, will fix in future release.

* ``ZEP-473`` - Destination multicast address is not correct
   - No workaround, will fix in future release.