Zephyr 3.5.0

We are pleased to announce the release of Zephyr version 3.5.0.

Major enhancements with this release include:

  • Added support for linkable loadable extensions (llext)

  • Added native_sim simulator target (successor to native_posix)

  • Added new battery charger driver API

  • Added new hardware spinlock driver API

  • Added new modem subsystem

  • Added support for 45+ new boards

  • Networking: improvements to CoAP, Connection Manager, DHCP, Ethernet, gPTP, ICMP, IPv6 and LwM2M

  • Bluetooth: improvements to the Controller, Audio, Mesh, as well as the host stack in general

  • Improved LVGL graphics library integration

  • Integrated support with the CodeChecker static analyzer

  • Picolibc is now the default C standard library

An overview of the changes required or recommended when migrating your application from Zephyr v3.4.0 to Zephyr v3.5.0 can be found in the separate migration guide.

The following sections provide detailed lists of changes by component.

Kernel

Architectures

  • ARC

  • Introduced the scalar port for ARC VPX processors

  • Introduced support for ARCv3 HS (both 32 and 64 bit) SMP platforms with up to 12 CPU cores

  • Reworked GNU helper tools usage for ARC MWDT toolchain. Now helper tools can be used from Zephyr SDK (if SDK is installed)

  • Fixed dynamic thread stack allocation

  • Fixed STR assembly macro offset calculation issue which may cause build error for ARCv3 64bit

  • Cleaned-up and made more user friendly handling of the ARC MWDT toolchain path (ARCMWDT_TOOLCHAIN_PATH)

  • ARM

    • Architectural support for Arm Cortex-M has been separated from Arm Cortex-A and Cortex-R. This includes separate source modules to handle tasks like IRQ management, exception handling, thread handling and swap. For implementation details see GitHub #60031.

  • ARM64

  • RISC-V

    • Added support for detecting null pointer exception using PMP.

    • Added the CONFIG_RISCV_RESERVED_IRQ_ISR_TABLES_OFFSET option to allow IRQ vector at a specified offset to meet the requirements set by the Core-Local Interrupt Controller RISC-V specification.

    • Added the CONFIG_RISCV_SOC_HAS_CUSTOM_SYS_IO option to allow the use of custom system input/output functions.

    • Introduced the CONFIG_RISCV_TRAP_HANDLER_ALIGNMENT option to set the correct alignment of the trap handling code which is dependent on the MTVEC.BASE field size and is platform or application-specific.

  • Xtensa

    • Added basic MMU v2 Support.

  • x86

    • Added support for Intel Alder Lake boards

    • Added support for Intel Sensor Hub (ISH)

  • POSIX

    • Has been reworked to use the native simulator.

    • New boards have been added.

    • For the new boards, embedded C libraries can be used, and conflicts with the host symbols and libraries avoided.

    • The POSIX OS abstraction is supported in these new boards.

    • AMP targets are now supported.

    • Added support for LLVM source profiling/coverage.

Bluetooth

  • Audio

    Improved memory usage of codec configurations and codec capabilities. Fixed several bugs in BAP and the BAP-related services (ASCS, PACS, BASS), as well as missing features such as proper notification handling.

    • Added BAP bt_bap_stream_get_tx_sync

    • Added CAP stream send and tx sync

    • Added bt_audio_codec_cap_get helper functions

    • Added support for long read/write in CAP

    • Fixed ASCS Source ASE link loss state transition

    • Fixed ASCS possible ASE leak

    • Fixed ASCS to drop ISO PDUs if ASE is not in streaming state

    • Fixed BAP bt_bap_scan_delegator_find_state implementation

    • Fixed BAP issue with PA sync and ID in broadcast_sink_create

    • Fixed TMAS characteristic permissions

    • Fixed tbs_client missing discovery complete event

    • Fixed audio stack to accept empty CCID list in audio metadata

    • Fixed bad size of metadata_backup in ASCS

    • Fixed possible ASCS ASE stuck in releasing state

    • Refactored bt_audio_codec_cap to flat arrays

    • Refactored bt_audio_codec_cfg to flat arrays

    • Removed CONFIG_BT_PACS_{SNK,SRC}_CONTEXT

    • Removed scanning and PA sync from broadcast sink

    • Renamed bt_codec to bt_audio_codec_{cap, conf, data}

    • Renamed codec qos framing

    • Replaced BT_AUDIO_CODEC_LC3_ID -> BT_HCI_CODING_FORMAT_LC3

    • Replaced BT_AUDIO_CODEC_PARSE_ERR_ values with errno values.

    • Reworked PACS notify system

    • Updated ASCS ISO QOS based on BAP QOS

    • Updated BAP to filter PA data duplicates by default

    • Updated CSIP to unlock Non-bonded devices immediately.

    • Updated PACS to notify bonded clients on reconnect

    • Updated bt_cap_stream_ops_register to always register BAP callbacks

    • Updated the ASCS ACL disconnect behavior

    • Updated to split bt_audio_codec_meta_get to cfg and cap

  • Direction Finding

  • Host

    • Added SMP bondable flag overlay per connection

    • Added USE_NRPA advertising option

    • Added BT_CONN_PARAM_ANY to allow setting any value to connection parameters

    • Added advanced broadcast ISO parameters

    • Added advanced unicast ISO parameters

    • Added new API to manage Bluetooth settings storage

    • Fixed HCI ISO Data packets fragmentation

    • Fixed HCI ISO SDU length sent to controller

    • Fixed OTS bt_ots_init parameter struct naming

    • Fixed OTS memory leak while procedure is not finished

    • Fixed a connection reference leak

    • Fixed forced pairing request handling

    • Fixed host to invalidate the Resolvable Private Address when starting legacy advertising

    • Fixed issue with bt_iso_cig_reconfigure

    • Fixed possible buffer overflow in bt_conn_le_start_encryption

    • Fixed some SMP issues

    • Fixed to abort pairing if connection disconnected

    • Updated L2CAP accept callbacks

    • Updated LE L2CAP connected callback to be after connection response

    • Updated PAwR implementation to use RPA as responder address if BT_PRIVACY=y

  • Mesh

    • Added TF-M support.

    • Added support to use both tinycrypt and PSA based crypto

    • Added full virtual addresses support with the collisions resolution. The CONFIG_BT_MESH_LABEL_NO_RECOVER Kconfig option is introduced to restore the addresses for the subscription list and model publication.

    • Added statistic module.

    • Fixed an issue where a node acting as a LPN was triggering Friend Poll messages when sending a segmented message over the loopback interface.

    • Fixed an issue where provisioning completes successfully on a node when the identical Public Key is used by a provisioner.

    • Fixed an issue where the settings_load() function called from a cooperative thread other than the system workqueue caused the GATT Mesh Proxy Service registration to fail.

    • Fixed an issue where a node could enter IV Update in Progress state if an old SNB with the current IV Index and IV Update flag set to 1 was resent.

    • Mesh Protocol v1.1 changes

      • Added storing Private GATT Proxy state persistently.

      • Added support for Firmware Distribution Upload OOB Start message in the Firwmware Distribution Server model. The message support can be enabled with the CONFIG_BT_MESH_DFD_SRV_OOB_UPLOAD Kconfig option.

      • Added extended provisioning protocol timeout when OOB methods are used in the provisioning.

      • Added support for Composition Data Pages 2, 129 and 130.

      • Added documentation for Composition Data Pages 0, 1, 2, 128, 129 and 130.

      • Added documentation for the Segmentation and Reassembly in the Transport layer.

      • Added documentation for the SAR Configuration models

      • Fixed an issue where the Opcode Aggregator Server model did not compile without the Opcode Aggregator Client model.

      • Fixed an issue where the identity address was used in Private GATT Proxy advertisements instead of Non-Resolvable Private Addresses.

      • Fixed the Proxy Privacy parameter support.

      • Fixed an issue where the Composition Data Page 128 was not present on a node that has instantiated the Remote Provisioning Server model.

      • Fixed an issue where the Large Composition Data Server model did not support Composition Data Pages other then 0.

      • Fixed an issue where the Remote Provisioning Client model instanted on a node together with the Remote Provisioning Server model could not reprovision itself.

      • Fixed an issue where the acknowledgment timer in the Segmentation and Reassembly was not restarted when the incoming Segment Acknowledgment message did not contain at least one segment newly marked as acknowledged.

      • Fixed an issue where the On-Demand Private Proxy Server and Client models had interdependency that did not allow to compile them separately.

  • Controller

    Improved support for Broadcast and Connected Isochronous channels in the Controller, enabling LE audio application development. The Controller is experimental, is missing implementations for interleaved packing in Isochronous channels’ lower link layer.

    • Added Checks for minimum sizes of Adv PDUs

    • Added Kconfig Option to ignore Tx HCI ISO Data Packet Seq Num

    • Added Kconfig for avoiding ISO SDU fragmentation

    • Added Kconfig to maximize BIG event length and preempt PTO & CTRL subevents

    • Added BT_CTLR_EVENT_OVERHEAD_RESERVE_MAX Kconfig

    • Added memory barrier to ticker transactions

    • Added missing nRF53x Tx Power Kconfig

    • Added support for Flush Timeout in Connected ISO

    • Fixed BIS payload sliding window overrun check

    • Fixed CIS Central FT calculation

    • Fixed CIS Central error handling

    • Fixed CIS asymmetric PHY usage

    • Fixed CIS encryption when DF support enabled

    • Fixed ISO-AL for quality tests and time stamps

    • Fixed PHY value in HCI LE CIS Established Event

    • Fixed ULL stuck in semaphore under rare conditions

    • Fixed assertion due to late PER CIS active set

    • Fixed compiler instruction re-ordering that caused assertions

    • Fixed connected ISO dynamic tx power

    • Fixed failing advertising conformance tests

    • Fixed handling received Auxiliary PDUs when Coded PHY not supported

    • Fixed leak in scheduled ticker node when rescheduling ticker nodes

    • Fixed missing host feature reset

    • Fixed nRF53 SoC back-to-back PDU chaining

    • Fixed nRF53 SoC back-to-back Tx Rx implementation

    • Fixed regression in Adv PDU overflow calculation

    • Fixed regression in observer that caused assertions and scheduling stall

    • Fixed use of pre-programmed PPI on nRF SoCs

    • Removed HCI ISO data with invalid status in preparation for FT support

    • Updated Extended Advertising Report to not be generated when AUX_ADV_IND not received

    • Updated to have EVENT_OVERHEAD_START_US verbose assertion in each state/role LLL

    • Updated to stop following aux_ptr if DATA_LEN_MAX is reached during extended scanning

Boards & SoC Support

  • Added support for these SoC series:

    • Nuvoton NuMaker M46x series

    • Added support for STM32F072X8 SoC variants

    • Added support for STM32L051X6 SoC variants

    • Added support for STM32L451XX SoC variants

    • Added support for STM32L4Q5XX SoC variants

    • Added support for STM32WBA SoC series

  • Removed support for these SoC series:

  • Made these changes in other SoC series:

    • i.MX RT SOCs no longer enable CONFIG_DEVICE_CONFIGURATION_DATA by default. boards using external SDRAM should set CONFIG_DEVICE_CONFIGURATION_DATA and CONFIG_NXP_IMX_EXTERNAL_SDRAM to enabled.

    • i.MX RT SOCs no longer support CONFIG_OCRAM_NOCACHE, as this functionality can be achieved using devicetree memory regions

    • Refactored ESP32 SoC folders. So now these are a proper SoC series.

    • RP2040: Changed to reset the I2C device on initializing

  • Added support for these ARC boards:

    • Added support for nsim_vpx5 - simulation (nSIM) platform with ARCv2 VPX5 core, close to vpx5_integer_full template

    • Added support for nsim_hs5x_smp_12cores - simulation (nSIM) platform with 12 cores SMP 32-bit ARCv3 HS

    • Added support for nsim_hs6x_smp_12cores - simulation (nSIM) platform with 12 cores SMP 64-bit ARCv3 HS

  • Added support for these ARM boards:

    • Nuvoton NuMaker Platform M467

    • ST Nucleo U5A5ZJ Q

    • ST Nucleo WBA52CG

  • Added support for these ARM64 boards:

  • Added support for these RISC-V boards:

  • Added support for these X86 boards:

  • Added support for these Xtensa boards:

    • Added esp32_devkitc_wroom and esp32_devkitc_wrover.

    • Added esp32s3_luatos_core.

    • Added m5stack_core2.

    • Added qemu_xtensa_mmu utilizing Diamond DC233c SoC to support testing Xtensa MMU.

    • Added xiao_esp32s3.

    • Added yd_esp32.

  • Added support for these POSIX boards:

    • native_sim(_64)

    • nrf5340bsim_nrf5340_cpu(net|app). A simulated nrf5340 SOC, which uses Babblesim for its radio traffic.

  • Made these changes for ARC boards:

    • Turned off unsupported stack checking option for hsdk4xd platform

    • Changed vendor prefix for ARC QEMU platforms from “qemu” to “snps”

  • Made these changes for ARM boards:

    • ST morpho connector description was added on ST nucleo boards.

    • rpi_pico:

      • The default adapter when debugging with openocd has been changed to cmsis-dap.

  • Made these changes for ARM64 boards:

  • Made these changes for RISC-V boards:

  • Made these changes for X86 boards:

  • Made these changes for Xtensa boards:

    • esp32s3_devkitm:

      • Added USB-CDC support.

      • Added CAN support.

  • Made these changes for POSIX boards:

    • nrf52_bsim:

      • Has been reworked to use the native simulator as its runner.

      • Multiple HW models improvements and fixes. GPIO & GPIOTE peripherals added.

  • Removed support for these ARC boards:

  • Removed support for these ARM boards:

  • Removed support for these ARM64 boards:

  • Removed support for these RISC-V boards:

  • Removed support for these X86 boards:

  • Removed support for these Xtensa boards:

    • Removed esp32. Use esp32_devkitc_* instead.

  • Made these changes in other boards:

  • Added support for these following shields:

    • Adafruit PiCowbell CAN Bus Shield for Pico

    • Arduino UNO click shield

    • G1120B0MIPI MIPI Display

    • MikroElektronika MCP2518FD Click shield (CAN-FD)

    • RK055HDMIPI4M MIPI Display

    • RK055HDMIPI4MA0 MIPI Display

    • Semtech SX1276MB1MAS LoRa Shield

Build system and infrastructure

  • SCA (Static Code Analysis)

    • Added support for CodeChecker

  • Twister now supports required_snippets in testsuite .yml files, this can be used to include a snippet when a test is ran (and exclude any boards from running that the snippet cannot be applied to).

  • Interrupts

    • Added support for shared interrupts

  • Added support for setting MCUboot encryption key in sysbuild which is then propagated to the bootloader and target images to automatically create encrypted updates.

  • Build time priority checking: enable build time priority checking by default. This fails the build if the initialization sequence in the final ELF file does not match the devicetree hierarchy. It can be turned off by disabling the CONFIG_CHECK_INIT_PRIORITIES option.

  • Added a new initlevels target for printing the final device and SYS_INIT initialization sequence from the final ELF file.

  • Reworked syscall code generations so that not all marshalling functions will be included in the final binary. Syscalls associated with disabled subsystems no longer have their marshalling functions generated.

  • Partially enabled compiler warning about shadow variables for subset of in-tree code. Out-of-tree code needs to be patched before we can fully enable shadow variable warnings.

Drivers and Sensors

  • ADC

    • Added support for STM32F0 HSI14 clock (dedicated ADC clock)

    • Added support for STM32 ADC source clock and prescaler. On STM32F1 and STM32F3 series, ADC prescaler can be configured using dedicated RCC Clock Controller option.

    • Added support for the ADC sequencer for all STM32 series (except F1)

    • Fixed STM32F4 ADC temperature and Vbat measurement.

    • Added driver for TI ADS1112.

    • Added driver for TI TLA2021.

    • Added driver for Gecko ADC.

    • Added driver for NXP S32 ADC SAR.

    • Added driver for MAX1125x family.

    • Added driver for MAX11102-MAX1117.

  • CAN

    • Added support for TI TCAN4x5x CAN-FD controller with integrated transceiver (ti,tcan4x5x).

    • Added support for Microchip MCP251xFD CAN-FD controller (microchip,mcp251xfd).

    • Added support for CAN statistics to the Bosch M_CAN controller driver backend.

    • Switched the NXP S32 CANXL driver to use clock control for the CAN clock instead of hard-coding a CAN clock frequency in the devicetree.

  • Clock control

    • Added support for Nuvoton NuMaker M46x

  • Counter

  • DAC

    • Added support for Analog Devices AD56xx

    • Added support for NXP lpcxpresso55s36 (LPDAC)

  • Disk

    • Ramdisk driver is now configured using devicetree, and supports multiple instances

  • Display

    • Added support for ST7735S (in ST7735R driver)

  • DMA

    • Added support for NXP S32K to the eDMA driver

    • Added support for NXP SMARTDMA

    • Added support for NXP Pixel Pipeline (PXP) for display acceleration

    • Added support for DMA get_status() to the SAM XDMAC driver

    • Fixes for Intel HDA driver for L1 entry/exit, explicit SCS (sample container) settings

    • Fixes for STM32U5 enables error interrupts, fixes block size and data size configuration

    • Better Kconfig options for tuning static memory usage in NXP LPC driver

  • EEPROM

  • Entropy

    • Added a requirement for entropy_get_entropy() to be thread-safe because of random subsystem needs.

  • Ethernet

    • Added CONFIG_ETH_NATIVE_POSIX_RX_TIMEOUT to set rx timeout for native posix.

    • Added support for adin2111.

    • Added support for NXP S32 GMAC.

    • Added support for promiscuous mode in eth_smsc91x.

    • Added support for STM32H5X SOC series.

    • Added support for MDIO Clause 45 APIs.

    • Added support for YD-ESP32 board Ethernet.

    • Fixed stm32 to generate more unique MAC address by using device id as a base for the MAC.

    • Fixed mcux to increase the PTP timestamp accuracy from 20us to 200ns.

    • Fixed Ethernet max header size when using VLAN.

    • Removed the mdio DT property. Please use DT_INST_BUS() in the driver instead.

    • Reworked the device node hierarchy in smsc91x.

    • Renamed the phy-dev property with phy-handle to match the Linux ethernet-controller binding and move it up to ethernet.yaml so that it can be used by other drivers.

    • Updated Ethernet PHY to use reg property in DT bindings.

    • Updated driver DT bindings to use ethernet-phy devicetree node name consistently.

    • Updated esp32 and sam-gmac DT so that the phy is pointed by a phandle rather than a child node, this makes the phy device a child of mdio.

  • Flash

    • Introduce npcx flash driver that supports two or more spi nor flashes via a single Flash Interface Unit (FIU) module and Direct Read Access (DRA) mode for better performance.

    • Added support for Nuvoton NuMaker M46x embedded flash

    • STM32 QSPI driver now supports Jedec SFDP parameter reading.

    • STM32 OSPI driver now supports both Low and High ports of IO manager.

  • GPIO

    • Added support for Nuvoton NuMaker M46x

  • I2C

    • STM32 V1 driver now supports large transactions (more than 256 bytes chunks)

    • STM32 V2 driver now supports 10-bit addressing.

    • I2C devices can now be used as wakeup source from STOP modes on STM32.

    • Fix long ISR execution in Silicon Labs I2C target callback

    • Fail gracefully on DMA max size for nRF52 devices in the TWIM driver

    • Added support for Intel LPSS DMA usage in the DesignWare driver

    • Added filtering of dumped messages for debugging using DeviceTree

    • Added target mode to Silicon Labs Gecko driver

    • Added Intel SEDI driver

    • Added Infineon XMC4 driver

    • Added Microchip PolarFire SoC driver

    • Added Ambiq driver for Apollo4 SoCs

  • I2S

    • Fixed handling of the PCM data format in the NXP MCUX driver.

  • I3C

    • i3c_cdns:

      • Fixed build error when CONFIG_I3C_USE_IBI is disabled.

      • Fixed transfer issue when controller is busy. Now wait for controller to idle before proceeding with another transfer.

  • IEEE 802.15.4

    • A new mandatory method attr_get() was introduced into ieee802154_radio_api. Drivers need to implement at least IEEE802154_ATTR_PHY_SUPPORTED_CHANNEL_PAGES and IEEE802154_ATTR_PHY_SUPPORTED_CHANNEL_RANGES.

    • The hardware capabilities IEEE802154_HW_2_4_GHZ and IEEE802154_HW_SUB_GHZ were removed as they were not aligned with the standard and some already existing drivers couldn’t properly express their channel page and channel range (notably SUN FSK and HRP UWB drivers). The capabilities were replaced by the standard conforming new driver attribute IEEE802154_ATTR_PHY_SUPPORTED_CHANNEL_PAGES that fits all in-tree drivers.

    • The method get_subg_channel_count() was removed from ieee802154_radio_api. This method could not properly express the channel range of existing drivers (notably SUN FSK drivers that implement channel pages > 0 and may not have zero-based channel ranges or UWB drivers that could not be represented at all). The method was replaced by the new driver attribute IEEE802154_ATTR_PHY_SUPPORTED_CHANNEL_RANGES that fits all in-tree drivers.

  • Interrupt Controller

    • GIC: Architecture version selection is now based on the device tree

  • Input

  • PCIE

    • Added support in shell to display PCIe capabilities.

    • Added virtual channel support.

    • Added kconfig CONFIG_PCIE_INIT_PRIORITY to specify initialization priority for host controller.

    • Added support to get IRQ from ACPI PCI Routing Table (PRT).

  • ACPI

    • Adopted the ACPICA library as a new module to further enhance ACPI support.

  • Pin control

    • Added support for Nuvoton NuMaker M46x

  • PWM

    • Added 4 channels capture on STM32 PWM driver.

    • Added driver for Intel Blinky PWM.

    • Added driver for MAX31790.

    • Added driver for Infineon XMC4XXX CCU4.

    • Added driver for Infineon XMC4XXX CCU8.

    • Added MCUX CTimer based PWM driver.

    • Added PWM driver based on TI CC13xx/CC26xx GPT timer.

    • Reworked the pwm_nrf5_sw driver so that it can be used also on nRF53 and nRF91 Series. Consequently, the driver was renamed to pwm_nrf_sw.

    • Added driver for Nuvoton NuMaker family.

    • Added PWM driver based on NXP S32 EMIOS peripheral.

  • Regulators

    • Added support for GPIO-controlled voltage regulator

    • Added support for AXP192 PMIC

    • Added support for NXP VREF regulator

    • Fixed regulators can now specify their operating voltage

    • PFM mode is now support for nPM1300

    • Added new API to configure “ship” mode

    • Regulator shell allows to configure DVS modes

  • Reset

    • Added support for Nuvoton NuMaker M46x

  • Retained memory

  • RTC

    • Added support for STM32 RTC API driver. This driver is not compatible with the use of RTC based implementation of COUNTER API.

  • SDHC

    • Added driver for EMMC Host controller present on Alder lake platforms

    • Added driver for Atmel HSMCI controller present on SAM4E MCU series

  • Sensor

    • Reworked the ti,bq274xx to add BQ27427 support, fixed units for capacity and power channels.

    • Added ADC current sense amplifier and voltage sensor drivers.

    • Added ADI LTC2990 voltage, current, and temperature sensor driver.

    • Added AMS TSL2540 ambient light sensor driver.

    • Added Bosch BMI08x accelerometer/gyroscope driver.

    • Added DFRobot A01NYUB distance sensor driver.

    • Added Fintek F75303 temperature sensor driver.

    • Added Isentek IST8310 magnetometer driver.

    • Added Microchip TCN75A temperature sensor driver.

    • Added NXP TEMPMON driver.

    • Added Seeed HM330X dust sensor driver.

    • Added TI TMAG5170 3D Hall sensor driver.

    • Added power management support to BMM150, LM75, and Microchip tachometer drivers.

    • Added trigger support to the BMM150 magnetometer driver.

    • Added tap trigger support to the LIS2DH accelerometer driver.

    • Updated ST sensor drivers to use STMEMSC HAL i/f v2.3

    • Updated the decoder APIs to vertically decode raw sensor data.

    • Various fixes and enhancements in the NTC thermistor and INA23x drivers.

  • Serial

    • Added support for Nuvoton NuMaker M46x

    • NS16550: Reworked how device initialization macros.

      • CONFIG_UART_NS16550_ACCESS_IOPORT and CONFIG_UART_NS16550_SIMULT_ACCESS are removed. For UART using IO port access, add io-mapped property to device tree node.

    • Added async support for ESP32S3.

    • Added support for serial TTY under native_posix.

    • Added support for UART on Efinix Sapphire SoCs.

    • Added Intel SEDI UART driver.

    • Added support for UART on BCM2711.

    • uart_stm32:

      • Added RS485 support.

      • Added wide data support.

    • uart_pl011: added support for Ambiq SoCs.

    • serial_test: added support for interrupt and async APIs.

    • uart_emul: added support for interrupt API.

    • uart_rpi_pico: fixed handling Modbus DE-RE signal

  • SPI

    • Remove npcx spi driver implemented by Flash Interface Unit (FIU) module.

    • Added support for Raspberry Pi Pico PIO based SPI.

  • Timer

    • The TI CC13xx/26xx system clock timer compatible was changed from ti,cc13xx-cc26xx-rtc to ti,cc13xx-cc26xx-rtc-timer and the corresponding Kconfig option from CC13X2_CC26X2_RTC_TIMER to CC13XX_CC26XX_RTC_TIMER for improved consistency and extensibility. No action is required unless the internal timer was modified.

  • USB

    • Added UDC driver for STM32 based MCU, relying on HAL/PCD. This driver is compatible with UDC API (experimental).

    • Added support for STM32H5 series on USB driver.

  • WiFi

    • Increased esp32 default network (TCP workq, RX and mgmt event) stack sizes to 2048 bytes.

    • Reduced the RAM usage for esp32s2_saola in Wi-Fi samples.

    • Fixed undefined declarations in winc1500.

    • Fixed SPI buffer length in eswifi.

    • Fixed esp32 data sending and channel selection in AP mode.

    • Fixed esp_at driver init and network interface dormant state setting.

Networking

  • CoAP:

    • Optimized CoAP client library to use only a single thread internally.

    • Converted CoAP client library to use zsock_* API internally.

    • Fixed a bug in CoAP client library, which resulted in an incorrect retransmission timeout calculation.

    • Use 64 bit timer values for calculating transmission timeouts. This fixes potential problems for devices that stay on for more than 49 days when the 32 bit uptime counter might roll over and cause CoAP packets to not timeout at all on this event.

    • API documentation improvements.

    • Added new API functions:

  • Connection Manager:

    • Added support for auto-connect and auto-down behaviors (controlled by CONN_MGR_IF_NO_AUTO_CONNECT and CONN_MGR_IF_NO_AUTO_DOWN flags).

    • Split Connection Manager APIs into separate header files.

    • Extended Connection Manager documentation to cover new functionalities.

  • DHCP:

    • Added support for DHCPv4 unicast replies processing.

    • Added support for DHCPv6 protocol.

  • Ethernet:

    • Fixed ARP queueing so that the queued network packet is sent immediately instead of queued 2nd time in the core network stack.

  • gPTP:

    • Added support for detecting gPTP packets that use the default multicast destination address.

    • Fixed Announce and Follow Up message handling.

  • ICMP:

    • Fixed ICMPv6 error message type check.

    • Reworked ICMP callback registration and handling, which allows to register multiple handlers for the same ICMP message.

    • Introduced an API to send ICMP Echo Request (ping).

    • Added possibility to register offloaded ICMP ping handlers.

    • Added support for setting packet priority for ping.

  • IPv6:

    • Made sure that ongoing DAD procedure is cancelled when IPv6 address is removed.

    • Fixed a bug, where Solicited-Node multicast address could be removed while still in use.

  • LwM2M:

    • Added support for tickless mode. This removes the 500 ms timeout from the socket loop so the engine does not constantly wake up the CPU. This can be enabled by CONFIG_LWM2M_TICKLESS.

    • Added new LWM2M_RD_CLIENT_EVENT_DEREGISTER event.

    • Block-wise sending now supports LwM2M read and composite-read operations as well. When CONFIG_LWM2M_COAP_BLOCK_TRANSFER is enabled, any content that is larger than CONFIG_LWM2M_COAP_MAX_MSG_SIZE is split into a block-wise transfer.

    • Block-wise transfers don’t require tokens to match anymore as this was not in line with CoAP specification (CoAP doesn’t require tokens reuse).

    • Various fixes to bootstrap. Now client ensures that Bootstrap-Finish command is sent, before closing the DTLS pipe. Also allows Bootstrap server to close the DTLS pipe. Added timeout when waiting for bootstrap commands.

    • Added support for X509 certificates.

    • Various fixes to string handling. Allow setting string to zero length. Ensure string termination when using string operations on opaque resources.

    • Added support for Connection Monitoring object version 1.3.

    • Added protection for Security object to prevent read/writes by the server.

    • Fixed a possible notification stall in case of observation token change.

    • Added new shell command, lwm2m create, which allows to create LwM2M object instances.

    • Added LwM2M interoperability test-suite against Leshan server.

    • API documentation improvements.

    • Several other minor fixes and improvements.

  • Misc:

    • Time and timestamps in the network subsystem, PTP and IEEE 802.15.4 were more precisely specified and all in-tree call sites updated accordingly. Fields for timed TX and TX/RX timestamps have been consolidated. See net_time_t, net_ptp_time, ieee802154_config, ieee802154_radio_api and net_pkt for extensive documentation. As this is largely an internal API, existing applications will most probably continue to work unchanged.

    • Added support for additional net_pkt filter hooks:

    • Reworked several networking components to use timepoint API.

    • Added API functions facilitate going through all IPv4/IPv6 registered on an interface (net_if_ipv4_addr_foreach(), net_if_ipv6_addr_foreach()).

    • NET_EVENT_IPV6_PREFIX_ADD and NET_EVENT_IPV6_PREFIX_DEL events now provide more detailed information about the prefix (net_event_ipv6_prefix).

    • General cleanup of the shadowed variables across the networking subsystem.

    • Added qemu_cortex_a53 networking support.

    • Introduced new modem subsystem.

    • Added new Cellular modem sample.

    • Added support for network interface names (instead of reusing underlying device name).

    • Removed support for Google Cloud IoT sample due to service retirement.

    • Fixed a bug where packets passed in promiscuous mode could have been modified by L2 in certain cases.

    • Added support for setting syslog server (used for networking log backend) IP address at runtime.

    • Removed no longer used queued and sent net_pkt flags.

    • Added support for binding zperf TCP/UDP server to a specific IP address.

  • MQTT-SN:

    • Improved thread safety of internal buffers allocation.

    • API documentation improvements.

  • OpenThread:

    • Reworked otPlatEntropyGet() to use sys_csrand_get() internally.

    • Introduced ieee802154_radio_openthread.h radio driver extension interface specific for OpenThread. Added new transmit mode, specific to OpenThread, IEEE802154_OPENTHREAD_TX_MODE_TXTIME_MULTIPLE_CCA.

  • PPP:

    • Fixed PPP L2 usage of the network interface carrier state.

    • Made PPP L2 thread priority configurable (CONFIG_NET_L2_PPP_THREAD_PRIO).

    • Moved PPP L2 out of experimental stage.

    • Prevent PPP connection reestablish when carrier is down.

  • Sockets:

  • TCP:

    • Fixed potential stall in data retransmission, when data was only partially acknowledged.

    • Made TCP work queue priority configurable (CONFIG_NET_TCP_WORKER_PRIO).

    • Added support for TCP new Reno collision avoidance algorithm.

    • Fixed source address selection on bound sockets.

    • Fixed possible memory leak in case listening socket was closed during active handshake.

    • Fixed RST packet handling during handshake.

    • Refactored the code responsible for connection teardown to fix found bugs and simplify future maintenance.

  • TFTP:

    • Added new TFTP client sample.

    • API documentation improvements.

  • WebSocket

    • WebSocket library no longer closes underlying TCP socket automatically on disconnect. This aligns with the connect behavior, where the WebSocket library expects an already connected TCP socket.

  • Wi-Fi:

    • Added Passive scan support.

    • The Wi-Fi scan API updated with Wi-Fi scan parameter to allow scan mode selection.

    • Updated TWT handling.

    • Added support for generic network manager API.

    • Added support for Wi-Fi mode setting and selection.

    • Added user input validation for SSID and PSK in Wi-Fi shell.

    • Added scan extension for specifying channels, limiting scan results, filtering SSIDs, setting active and passive channel dwell times and frequency bands.

USB

  • USB device HID * Kconfig option USB_HID_PROTOCOL_CODE, deprecated in v2.6, is finally removed.

Devicetree

API

New general-purpose macros:

New special-purpose macros introduced for dependency ordinals:

New general purpose macros introduced for fixed flash partitions:

Bindings

Libraries / Subsystems

  • Management

    • Introduced MCUmgr client support with handlers for img_mgmt and os_mgmt.

    • Added response checking to MCUmgr’s MGMT_EVT_OP_CMD_RECV notification callback to allow applications to reject MCUmgr commands.

    • MCUmgr SMP version 2 error translation (to legacy MCUmgr error code) is now supported in function handlers by setting mg_translate_error of mgmt_group when registering a group. See smp_translate_error_fn for function details.

    • Fixed an issue with MCUmgr img_mgmt group whereby the size of the upload in the initial packet was not checked.

    • Fixed an issue with MCUmgr fs_mgmt group whereby some status codes were not checked properly, this meant that the error returned might not be the correct error, but would only occur in situations where an error was already present.

    • Fixed an issue whereby the SMP response function did not check to see if the initial zcbor map was created successfully.

    • Fixes an issue with MCUmgr shell_mgmt group whereby the length of a received command was not properly checked.

    • Added optional mutex locking support to MCUmgr img_mgmt group, which can be enabled with CONFIG_MCUMGR_GRP_IMG_MUTEX.

    • Added MCUmgr settings management group, which allows for manipulation of zephyr settings from a remote device, see Settings (Config) Management Group for details.

    • Added CONFIG_MCUMGR_GRP_IMG_ALLOW_CONFIRM_NON_ACTIVE_IMAGE_SECONDARY and CONFIG_MCUMGR_GRP_IMG_ALLOW_CONFIRM_NON_ACTIVE_IMAGE_ANY that allow to control whether MCUmgr client will be allowed to confirm non-active images.

    • Added CONFIG_MCUMGR_GRP_IMG_ALLOW_ERASE_PENDING that allows to erase slots pending for next boot, that are not revert slots.

    • Added user_data as an optional field to mgmt_handler when CONFIG_MCUMGR_MGMT_HANDLER_USER_DATA is enabled.

    • Added optional force parameter to os mgmt reset command, this can be checked in the MGMT_EVT_OP_OS_MGMT_RESET notification callback whose data structure is os_mgmt_reset_data.

    • Added configurable number of SMP encoding levels via CONFIG_MCUMGR_SMP_CBOR_MIN_ENCODING_LEVELS, which automatically increments minimum encoding levels for in-tree groups if CONFIG_ZCBOR_CANONICAL is enabled.

    • Added STM32 SPI backend for EC Host command protocol.

    • Fixed settings_mgmt returning unknown error instead of invalid key specified error.

    • Fixed fs_mgmt returning parameter too large error instead of file is empty error when attempting to hash/checksum a file which is empty.

  • File systems

    • Added support for ext2 file system.

    • Added support of mounting littlefs on the block device from the shell/fs.

    • Added alignment parameter to FS_LITTLEFS_DECLARE_CUSTOM_CONFIG macro, it can speed up read/write operation for SDMMC devices in case when we align buffers on CONFIG_SDHC_BUFFER_ALIGNMENT, because we can avoid extra copy of data from card buffer to read/prog buffer.

  • Random

    • CONFIG_XOROSHIRO_RANDOM_GENERATOR, deprecated a long time ago, is finally removed.

  • Retention

  • Binary descriptors

  • POSIX API

  • LoRa/LoRaWAN

    • Updated loramac-node from v4.6.0 to v4.7.0

  • CAN ISO-TP

    • Added support for CAN FD.

  • RTIO

    • Added atomic completion counter fixing a race caught by unit tests

    • Added a RTIO_SQE_NO_RESPONSE flag for submissions when no completion notification is needed

    • Removed unused Kconfig options for different executors

  • ZBus

    • Changed channels’ and observers’ metadata to comply with the data/config approach. ZBus stores immutable config in iterable sections in Flash and the mutable portion of data in the RAM.

    • The relationship between channels and observers is mapped using a new entity called observation. The observation enables us to increase the granularity of masking observation. Developers can mask individual observations, disable the observer, or use runtime observers.

    • Added API ZBUS_CHAN_ADD_OBS macro for adding post-definition static observers of a channel. That can replace the runtime observer feature, enabling developers to add static observers after the channel definition in different files. It increases the composability of the system using ZBus, making post-definition channel observation rely on the stack instead of the heap.

    • Added a new type of observer called Message Subscriber. ZBus’ VDED will send a copy of the message during the publication/notification process.

    • Changed the VDED delivery sequence. Check the ref:documentation<zbus delivery sequence>.

    • ZBus runtime observers now rely on the heap instead of a memory pool.

    • Added new iterable section iterators APIs (for channels and observers) can now receive a user_data pointer to keep context between the function calls.

    • Added APIs ZBUS_LISTENER_DEFINE_WITH_ENABLE and ZBUS_SUBSCRIBER_DEFINE_WITH_ENABLE that allows developers to define observers’ statuses (enabled/disabled) programmatically. With the API, developers can create observers initially disabled and enable them in runtime.

  • Power management

  • Modem modules

HALs

  • Nordic

    • Updated nrfx to version 3.1.0.

  • Nuvoton

    • Added Nuvoton NuMaker M46x

MCUboot

  • Added CONFIG_MCUBOOT_BOOTLOADER_NO_DOWNGRADE that allows to inform application that the on-board MCUboot has been configured with downgrade prevention enabled. This option is automatically selected for DirectXIP mode and is available for both swap modes.

  • Added CONFIG_MCUBOOT_BOOTLOADER_MODE_OVERWRITE_ONLY that allows to inform application that the on-board MCUboot will overwrite the primary slot with secondary slot contents, without saving the original image in primary slot.

  • Fixed issue with serial recovery not showing image details for decrypted images.

  • Fixed issue with serial recovery in single slot mode wrongly iterating over 2 image slots.

  • Fixed an issue with boot_serial repeats not being processed when output was sent, this would lead to a divergence of commands whereby later commands being sent would have the previous command output sent instead.

  • Fixed an issue with the boot_serial zcbor setup encoder function wrongly including the buffer address in the size which caused serial recovery to fail on some platforms.

  • Fixed wrongly building in optimize for debug mode by default, this saves a significant amount of flash space.

  • Fixed issue with serial recovery use of MBEDTLS having undefined operations which led to usage faults when the secondary slot image was encrypted.

  • Fixed issue with bootutil asserting on maximum alignment in non-swap modes.

  • Added error output when flash device fails to open and asserts are disabled, which will now panic the bootloader.

  • Added currently running slot ID and maximum application size to shared data function definition.

  • Added P384 and SHA384 support to imgtool.

  • Added optional serial recovery image state and image set state commands.

  • Added dumpinfo command for signed image parsing in imgtool.

  • Added getpubhash command to dump the sha256 hash of the public key in imgtool.

  • Added support for getpub to print the output to a file in imgtool.

  • Added support for dumping the raw versions of the public keys in imgtool.

  • Added support for sharing boot information with application via retention subsystem.

  • Added support for serial recovery to read and handle encrypted seondary slot partitions.

  • Removed ECDSA P224 support.

  • Removed custom image list boot serial extension support.

  • Reworked boot serial extensions so that they can be used by modules or from user repositories by switching to iterable sections.

  • Reworked image encryption support for Zephyr, static dummy key files are no longer in the code, a pem file must be supplied to extract the private and public keys. The Kconfig menu has changed to only show a single option for enabling encryption and selecting the key file.

  • Reworked the ECDSA256 TLV curve agnostic and renamed it to ECDSA_SIG.

  • CDDL auto-generated function code has been replaced with zcbor function calls, this now allows the parameters to be supplied in any order.

  • The MCUboot version in this release is version 2.0.0+0-rc1.

Nanopb

  • Changed project status to maintained.

  • Added a separate nanopb.cmake file to be included by applications.

  • Added helper cmake function zephyr_nanopb_sources to simplify .proto file inclusion.

LVGL

  • Changed project status to maintained.

  • Library has been updated to release v8.3.7.

  • Added zephyr,lvgl-{pointer,button,encoder}-input pseudo device bindings. CONFIG_LV_Z_KSCAN_POINTER is still supported but touch controllers need a zephyr,kscan-input child node to emit input events.

  • LVGL shell allows for monkey testing (requires CONFIG_LV_USE_MONKEY) and inspecting memory usage.

Trusted Firmware-A

  • Updated to TF-A 2.9.0.

Documentation

  • Upgraded Sphinx to 6.2

Tests and Samples

  • Created common sample for file systems (fs_sample). It originates from sample for FAT (fat_fs) and supports both FAT and ext2 file systems.

  • Created the zbus confirmed channel sample to demonstrate how to implement a delivery-guaranteed channel using subscribers.

  • Created the zbus message subscriber sample to demonstrate how to use message subscribers.