Zephyr 3.3.0 (Working Draft)

We are pleased to announce the release of Zephyr version 3.3.0.

Major enhancements with this release include:

The following sections provide detailed lists of changes by component.

API Changes

Changes in this release

  • Bluetooth: CONFIG_BT_PER_ADV_SYNC_TRANSFER_RECEIVER and CONFIG_BT_PER_ADV_SYNC_TRANSFER_SENDER have been added to enable the PAST implementation rather than CONFIG_BT_CONN.

  • Flashdisk: CONFIG_DISK_FLASH_VOLUME_NAME, CONFIG_DISK_FLASH_DEV_NAME, CONFIG_DISK_FLASH_START, CONFIG_DISK_FLASH_MAX_RW_SIZE, CONFIG_DISK_ERASE_BLOCK_SIZE, CONFIG_DISK_FLASH_ERASE_ALIGNMENT, CONFIG_DISK_VOLUME_SIZE and CONFIG_DISK_FLASH_SECTOR_SIZE Kconfig options have been removed in favor of new zephyr,flash-disk devicetree binding.

  • Starting from this release zephyr- prefixed tags won’t be created anymore. The project will continue using v tags, for example v3.3.0.

Removed APIs in this release

Deprecated in this release

  • MCUmgr subsystem, specifically the SMP transport API, is dropping zephyr_ prefix, deprecating prefixed functions and callback type definitions with the prefix and replacing them with with prefix-less variants. The zephyr_smp_transport type, representing transport object, is now replaced with smp_transport, and the later one is used, instead of the former one, by all prefix-less functions.

    Deprecated functions and their replacements:

    Deprecated

    Drop in replacement

    zephyr_smp_transport_init()

    smp_transport_init()

    zephyr_smp_rx_req()

    smp_rx_req()

    zephyr_smp_alloc_rsp()

    smp_alloc_rsp()

    zephyr_smp_free_buf()

    smp_free_buf()

    Deprecated callback types and their replacements:

    Deprecated

    Drop in replacement

    zephyr_smp_transport_out_fn()

    smp_transport_out_fn()

    zephyr_smp_transport_get_mtu_fn()

    smp_transport_get_mtu_fn()

    zephyr_smp_transport_ud_copy_fn()

    smp_transport_ud_copy_fn()

    zephyr_smp_transport_ud_free_fn()

    smp_transport_ud_free_fn()

    NOTE: Only functions are marked as __deprecated, type definitions are not.

Stable API changes in this release

New APIs in this release

Kernel

Architectures

  • ARM

  • ARM

  • ARM64

  • RISC-V

  • Xtensa

Bluetooth

  • Audio

  • Direction Finding

  • Host

    • Fixed missing calls to bt_le_per_adv_sync_cb.term when deleting a periodic advertising sync object.

  • Mesh

    • Change default advertiser to be extended advertiser.

  • Controller

  • HCI Driver

Boards & SoC Support

  • Added support for these SoC series:

  • Removed support for these SoC series:

  • Made these changes in other SoC series:

  • Changes for ARC boards:

  • Added support for these ARM boards:

  • Added support for these ARM64 boards:

  • Removed support for these ARM boards:

  • Removed support for these X86 boards:

  • Added support for these RISC-V boards:

  • Added support for these Xtensa boards:

  • Removed support for these Xtensa boards:

  • Made these changes in other boards:

  • Added support for these following shields:

Build system and infrastructure

Drivers and Sensors

  • ADC

  • CAN

  • Clock control

  • Counter

  • Crypto

  • DAC

  • DFU

  • Disk

  • Display

  • DMA

  • EEPROM

  • Entropy

  • ESPI

  • Ethernet

  • Flash

    • NRF: Added CONFIG_SOC_FLASH_NRF_TIMEOUT_MULTIPLIER to allow tweaking the timeout of flash operations.

    • spi_nor: Added property mxicy,mx25r-power-mode to jedec,spi-nor binding for controlling low power/high performance mode on Macronix MX25R* Ultra Low Power flash devices.

  • GPIO

  • I2C

  • I2S

  • I3C

  • IEEE 802.15.4

  • Interrupt Controller

  • IPM

  • KSCAN

  • LED

  • MBOX

  • MEMC

  • PCIE

  • PECI

  • Pin control

  • PWM

  • Power domain

  • Reset

  • SDHC

  • Sensor

  • Serial

  • SPI

  • Timer

  • USB

  • W1

  • Watchdog

  • WiFi

Networking

USB

Devicetree

Libraries / Subsystems

  • Management

    • MCUmgr functionality deprecated in 3.1 has been removed: CONFIG_FS_MGMT_UL_CHUNK_SIZE, CONFIG_IMG_MGMT_UL_CHUNK_SIZE, CONFIG_OS_MGMT_ECHO_LENGTH

    • MCUmgr fs_mgmt issue with erasing a file prior to writing the first block of data has been worked around by only truncating/deleting the file data if the file exists. This can help work around an issue whereby logging is enabled and the command is sent on the same UART as the logging system, in which a filesystem error was emitted.

    • A MCUmgr bug when using the smp_svr sample with Bluetooth transport that could have caused a stack overflow has been fixed.

    • A MCUmgr issue with Bluetooth transport that could cause a deadlock of the mcumgr thread if the remote device disconnected before the output message was sent has been fixed.

  • LwM2M

    • The lwm2m_senml_cbor_* files have been regenerated using zcbor 0.6.0.

HALs

MCUboot

Trusted Firmware-M

zcbor

Upgraded zcbor to 0.6.0. Among other things, this brings in a few convenient changes for Zephyr:

  • In the zcbor codebase, the ARRAY_SIZE macro has been renamed to ZCBOR_ARRAY_SIZE to not collide with Zephyr’s ARRAY_SIZE macro.

  • The zcbor codebase now better supports being used in C++ code.

The entire release notes can be found at https://github.com/zephyrproject-rtos/zcbor/blob/0.6.0/RELEASE_NOTES.md

Documentation

Tests and Samples