Zephyr 2.5.0 (Working Draft)¶
We are pleased to announce the release of Zephyr RTOS version 2.5.0.
Major enhancements with this release include:
Introduced support for the SPARC processor architecture and the LEON processor implementation.
The following sections provide detailed lists of changes by component.
Known issues¶
You can check all currently known issues by listing them using the GitHub interface and listing all issues with the bug label.
API Changes¶
Removed SETTINGS_USE_BASE64 support as its been deprecated for more than two releases.
The
lwm2m_rd_client_start()
function now accepts an additionalflags
parameter, which allows to configure current LwM2M client session, for instance enable bootstrap procedure in the curent session.Changed vcnl4040 dts binding default for property ‘proximity-trigger’. Changed the default to match the HW POR state for this property.
The
clock_control_async_on()
function will now takecallback
anduser_data
as arguments instead of structure which contained list node, callback and user data.
Deprecated in this release¶
Nordic nRF5340 PDK board deprecated and planned to be removed in 2.6.0.
ARM Musca-A board and SoC support deprecated and planned to be removed in 2.6.0.
DEVICE_INIT was deprecated in favor of utilizing DEVICE_DEFINE directly.
Removed APIs in this release¶
Stable API changes in this release¶
Kernel¶
Architectures¶
ARC
ARM
AARCH32
Introduced the functionality for chain-loadable Zephyr fimrmware images to force the initialization of internal architecture state during early system boot (Cortex-M).
AARCH64
POSIX
RISC-V
SPARC
Added support for the SPARC architecture, compatible with the SPARC V8 specification and the SPARC ABI.
x86
Boards & SoC Support¶
Added 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 SPARC boards:
GR716-MINI LEON3FT microcontroller development board
Generic LEON3 board configuration for GRLIB FPGA reference designs
SPARC QEMU for emulating LEON3 processors and running kernel tests
Made these changes in other boards:
Added support for these following shields:
Drivers and Sensors¶
ADC
Audio
Bluetooth
CAN
Clock Control
Console
Counter
Crypto
DAC
Debug
Display
DMA
EEPROM
Entropy
ESPI
Ethernet
Flash
GPIO
Hardware Info
I2C
I2S
IEEE 802.15.4
Interrupt Controller
IPM
Keyboard Scan
LED
LED Strip
LoRa
Modem
PECI
Pinmux
PS/2
PWM
Sensor
Serial
SPI
Timer
USB
Made USB DFU class compatible with the target configuration that does not have a secondary image slot.
Support to use USB DFU within MCUBoot with single application slot mode.
Video
Watchdog
WiFi
Networking¶
Bluetooth¶
Host
When privacy has been enabled in order to advertise towards a privacy-enabled peer the BT_LE_ADV_OPT_DIR_ADDR_RPA option must now be set, same as when privacy has been disabled.
Mesh
The
bt_mesh_cfg_srv
structure has been deprecated in favor of a standalone Heartbeat API and Kconfig entries for default state values.
BLE split software Controller
HCI Driver
Build and Infrastructure¶
Improved support for additional toolchains:
Devicetree
DT_ENUM_IDX_OR
: new macroSupport for legacy devicetree macros via
CONFIG_LEGACY_DEVICETREE_MACROS
was removed. All devicetree-based code should be using the new devicetree API introduced in Zephyr 2.3 and documented in Devicetree access from C/C++. Information on flash partitions has moved to Flash map.
Libraries / Subsystems¶
Disk
Management
MCUmgr
updatehub
Settings
Random
POSIX subsystem
Power management
Logging
LVGL
Library has been updated to minor release v7.6.1
Shell
Storage
flash_map: Added API to get the value of an erased byte in the flash_area, see
flash_area_erased_val()
.
Tracing
Debug
HALs¶
HALs are now moved out of the main tree as external modules and reside in their own standalone repositories.
MCUBoot¶
bootloader
Added hardening against hardware level fault injection and timing attacks, see
CONFIG_BOOT_FIH_PROFILE_HIGH
and similar kconfig options.Introduced Abstract crypto primitives to simplify porting.
Added ram-load upgrade mode (not enabled for zephy-rtos yet).
Renamed single-image mode to single-slot mode, see
CONFIG_SINGLE_APPLICATION_SLOT
.Added patch for turning off cache for Cortex M7 before chain-loading.
Fixed boostrapping in swap-move mode.
Fixed issue causing that interrupted swap-move operation might brick device if the primary image was padded.
Fixed issue causing that HW stack protection catches the chain-loaded application during its early initialization.
Added reset of Cortex SPLIM registers before boot.
Fixesd build issue that occurs if CONF_FILE contains multiple file paths instead of single file path.
Added watchdog feed on nRF devices. See
CONFIG_BOOT_WATCHDOG_FEED
option.Removed the flash_area_read_is_empty() port implementation function.
Initialize the ARM core configuration only when selected by the user, see
CONFIG_MCUBOOT_CLEANUP_ARM_CORE
.Allow the final data chunk in the image to be unaligned in the serial-recovery protocol.
imgtool
Print image digest during verify.
Add possibility to set confirm flag for hex files as well.
Usage of –confirm implies –pad.
Fixed ‘custom_tlvs’ argument handling.