Page History

Versions Compared

Old Version 24

changes.mady.by.user Alin Jerpelea

Saved on Apr 16, 2021

compared with

New Version Current

changes.mady.by.user Nathan Hartman

Saved on Jun 10, 2021

Key

This line was added.
This line was removed.
Formatting was changed.

Comment: Delete "Work In Progress" warning; This version of NuttX has been released.

Table of Contents

Work In Progress

Warning

title	Work In Progress

NuttX 10.1 has not been released yet. These Release Notes are a work-in-progress in preparation for the next release of NuttX. There is a board tracking the PRs that need to be looked at to add to this doc for the OS TODO ADD LINK and for the Apps TODO ADD LINK

What's New In This Release

Highlights

Better separation between kernel and userspace.

Heap and stack management improvements.

More closely follow POSIX and Linux interfaces.

Symmetric Multi-Processing (SMP) performance improvements and bug fixes.

Networking improvements and bug fixes.

Added support for many microcontrollers and boards, and improved support for many existing ones.

Many added and improved drivers.

Build system improvements to deliver faster builds.

Thousands of NuttX files converted to Apache 2.0 License with permission of their authors.

Improved listing of 3rd party licenses used in NuttX (see LICENSE, NOTICE, and DISCLAIMER-WIP files).

Major Changes to Core OS

New Features

#2820 arch, boards, drivers, include, sched, wireless: Change spinlock APIs.

#2885 Ensure the kernel component don't call userspace API

#2324 audio: libsamplerate: add initial audio Sample Rate Converter

Bug Fixes

#2627 OS internal function should indicate the error by return negative value

#2980 include: Add iso646.h for alternative spellings

#3115 libc: time: localtime: fix race condition

#3253 libc pthread: Fix pthread_rwlock_init return error

#2938 libs: misc: Remove critical section in lib_filesem.c for SMP

#2865 libc: :machine:risc-v:unifying elf relocation code

#2675 libc: Add placement new and new[] function

#2451 libc: pthread_mutexattr_getprotocol: modify prototype

#2326 libc: Enhance getopt function

#2407 libc: machine: arch: Support armv8-m relocation

#2509 libc: net: implement ether_aton/ether_aton_r

#2530 libc: Implement posix_fallocate

#2604 libc: Add b64_ntop and b64_pton implementation

#2534 libc: Implement getppid

#2574 libc: dumpbuffer: dump buffer enhancement

#3445 libc: update stream getoffset to handle write case

#2585 libc: netdb: Move hostbuffer out of the stack

#2630 libc: net: implement socketpair

#2741 libc: unistd/fpathconf: enhance fpathconf

#3251 libc: update pthread_once according to the specification

#2742 libc: pthread/cond: enhance pthread_cond_destroy

#2285 libc/stdlib: Fix range check in strtoul(l)

#2881 libc: Move stack check stuff from libc/stdlib/ to libc/assert/

#1994 libc: Don't fclose and fopen file in freopen

#2910 libc/hex2bin: fix handling of segment offsets

#3170 libc: Move getopt() variables into TLS

#2076 libc: math: Make this friendly with libcxx

#3280 libc: Correct some getopt() logic

#2650 libc: ctype/iscntrl: correct the control character function

#2616 libc/dumpvbuffer: update the vector ptr correctly

#3447 libc: correct zoneinfo genromfs source directory

#2694 libc/machine/arch: fix build break if enable armv8 ELF

#2418 libc: Change OK/ERROR from macro to enum

#3083 libc: stdio/lib_clearerr: Did not clear stream buffer flags in clearerr

#3272 libc: Implement getopt_long() and getopt_long_only()

#3308 libc: getopt_long(): Add support for required argument format

#3294 libc: getopt(): Fix Use of Pointer before NULL check

#3299 libc: getopt_common(): Correct handling of unsupported long options.

#2904 libc: unistd/getcwd: enhance getcwd when buf is NULL

#2855 libs: Remove the duplicated _NX_ and _MQ_ macro

#2111 LIBCXX related fixes

#2693 libxx: use built-in __aeabi_atexit() if LIBSUPCXX is enabled

#3268 libdsp/fixed16: add open-loop handler

#3244 libdsp: Improvements for libdsp and support for fixed16 libdsp implementation

#2243 libcxx: Update 0001-libcxx-Port-to-NuttX-https-nuttx.apache.org-RTOS.patch

#3121 mm/heap: Move semaphore related declaration to private header

#3086 mm: improve the memory manager modularity and reduce the information explosion

#3228 mm/mm_heap: fix compile failed when open DEBUG_MM

#2906 mm: umm_heap: valloc: support valloc (LEGACY)

#3131 mm: Minor fix for heap manager

#2449 mm/circbuf: fix the problem of dividing by zero

#3159 mm: mm_heap: Remove critical section in mm_sem.c

#2942 mtd: progmem: Add up_progmem_read callback guarded by ARCH_HAVE_PROGMEM_READ

#2849 mqueue: Add _MQ_OPEN, _MQ_CLOSE and _MQ_UNLINK macro

#2071 pollnotify: we should send poll events before semaphore incrementes.

#2492 procfs: make array const to reduce memory use

#3123 sched: pthread: Remove a redundant critical section in pthread_condclockwait.c

#3080 sched: semaphore: Remove a redundant critical section in nxsem

#2147 sched: Use nx_close() inside OS

#2767 sched/wqueue/notifier: protect the work notifier with critical section

#2960 sched: signal: sigdeliver: fix system block when kill signal to idle in SMP

#1922 sched: nxtask_start should call entry point directly for kernel thread

#2229 sched/sched/sched_waitid.c: Allow WNOHANG

#3111 sched: Sporadic scheduler: Fix time calculation and compile errors when assertions are enabled:

#2261 sched/timer: add support of CLOCK_MONOTONIC

#2455 sched/sched/sched_waitpid.c: Discard the correct child entry

#2487 sched: clock/time: add CLOCK_BOOTTIME definition

#2517 sched: spinlock: Introduce SP_WFE() and SP_SEV()

#2518 sched: Don't forward gettid to getpid directly

#2726 sched: sched: Remove sched_lock/unlock from nxsched_set_affinity()

#2737 sched: task: Fix a potential bug in nxtask_assign_pid()

#2744 sched: task: Fix comments and label in nxtask_assign_pid()

#2797 sched: group: Fix group_kill_children() for SMP

#2740 sched/timer: get the previous reload value correctly

#2602 sched: Add include/sys/poll.h

#2262 sched/init: init the default home directory to environment

#2719 sched/task: setup the scheduling policy to task

#2872 sched: pthread: Fix pthread cmdline issue

#2765 sched: pthread: Return get_errno instead the hardcode value

#2437 sched/sched/sched_waitpid.c: Fix return value

#2043 sched: Add SCHED_INSTRUMENTATION_HIRES support

#2044 sched: Add note_syscall args support

#3289 sched: task: Fix to initialize the task-specific data

#2005 Fix note_syscall_leave_s to avoid unaligned access

#3247 sched: Move the default Task Stack size to Stack menu

#2631 sched: mqueue: simplify the mqueue reailize

#2653 sched: Don't call sched_lock()/unlock() in nx_waitid()/waitpid() for SMP

#2981 sched: Remove all group id related stuff

#2946 sched: task: Call nxtask_flushstreams() without critical section

#2624 sched: implement the default test-and-set semantics

#2204 sched: irq: Fix enter_critical_section() in an irq handler for SMP

#3196 sched/signal: Implement SA_NODEFER

#2176 syscall/syscall.csv: Increase number of arguments for prctl()

#3033 unistd: Fix getpriority not handling invalid input value

#2450 unistd/getopt: remove number of arguments limit

#2256 unistd/sched_sporadic: correct the disable value

#2255 sys/epoll: sync the epoll define with linux

#2236 sched/task/task_exithook.c: Remove a redundant assignment

#2218 sched: signal.h: fix compile failed when open TTY_SIGINT

#1852 sysconf: add _SC_PAGESIZE sysconf support

#2538 sched: pthread: Fix potential bugs in pthread_condclockwait.c

#2475 sched/sched_waitid.c: Fix two bugs when CONFIG_SCHED_CHILD_STATUS is enabled

#2420 sched/signal: Remove redundant checks

#2494 sched: Fix SMP

#2919 sched: fix fd leak in dlopen

#2533 sched: Make the number of queue/signal used by irq handler configurable

#2580 sched: arch & sched: task: Fix up_exit() and nxtask_exit() for SMP

#2668 Kernel module should prefer functions with nx/kmm prefix

Major Changes to the Build System

New Features

#2824 build/esp32: Create Flash size configuration and a new DOWNLOAD make target

#2107 build: Makefile should reference CONFIG_HOST_xxx

#3317 tols: Update python scripts to py3 and lint all of them againt Black

#2392 configure.sh: support custom board build config with absolute path

#1834 License/authorship handling scripts

Bug Fixes

#3017 tools: esp32: Config.mk: Revert part of "Don't abort make when QEMU script fails"

#2882 tools: esp32: refine the QEMU image generation.

#2729 tools: esp32: backtrace.gdbscript: Add comments

#2673 tools: esp32: add a gdb script to show backtrace

#2679 tools: esp32: btdecode.sh: Script to decode the Xtensa backtrace.

#2895 tools: esp32: fix warnings from ShellCheck

#3012 tools: esp32xx: Few fixes/improvements to the post build scripts

#2803 tools: esp32: Remove some duplicated output

#2701 tools: gdbinit: add support for reporting total and used stack size

#3094 tools: version.sh: Fix PATCH including extra version

#2642 tools/version.sh: Fix the version retrieved from git-tag

#2982 tools: nxstyle: Verify relative path in the file header

#3004 tools: esp32XX: Delete the Makefile that downloads IDF.

#2930 tools: version.sh: If the version is not available, use 0.0.0

#2411 tools: Add 'handle SIGUSR1' to nuttx-gdbinit for the NuttX sim SMP

#2221 tools: Avoid messing the final binary nuttx.(bin,hex,...) compilation msg

#2192 build: Move __NuttX__ definition to tools/Config.mk

#2101 build: Add $(OBJS) and $(BIN) to CLEAN macro to clean objects also in subdirectories

#2380 tools: Fix nuttx-gdbinit for armv7-m with FPU

#2032 build: Change .external_dummy to dummy

#2335 build: Parallelize depend file generation

#2432 build system: add missing --obj-path to MKDEP

#1890 make/expression: improving up asm/C/C++ compile times(make with multi-jobs only)

#2404 Update checkrelease script to check readme.md instead of .txt

#2557 tools/version.sh: Fix the version retrieved from GIT

#2561 tools: Fix version.sh

#1940 cygwin build - path issue fix for Renesas arch

Architectural Support

New Architecture

#2974 STM32L5 Architecture Support

#3001 arch:riscv64:basic porting for C906

#3023 Remove nr5m100 and gap8 support

#2566 arch/risc-v: Add BL602 support

#1995 arch: Add custom arch chip build support

#2161 Added Support for more TI Tiva Microcontrollers: TM4C123GH6PZ, TM4C123GH6PGE, TM4C129ENCPDT, and TM4C129ENCZAD.

Architectures with significant improvements

ARM

#2042 Fix interrupt stack handlings for ARM SMP

#2932 arch: armv6-m: Apply armv7-m signal handling logic

#2990 arch/armv7-m: Adds dwt helper functions for controlling watchpoints i…

#2876 arm: ARMv6-M vector table offset register support

#2061 Refactor arm interrupt stack related code

CXD56XX

#2750 arch: cxd56xx: Add i2c bitbang lower driver

#2830 Driver-specific spinlock for cxd56_serial.c

STM32

#2177 FLASH waiting cycles are configured based on HCLK.

#2985 stm32 Ethernet hardening

#2477 STM32 FLASH latency is calculated based on Vin

#2473 STM32 - Add ADC register definitions for STM32G4 family

#2325 arch/arm/src/stm32/stm32_serial.c: for flowcontrol use common idiom for enabling/disabling RX interrupts

#2194 stm32 - Add register mappings for STM32Gxxxxx-family DAC

#2180 stm32 - Add register mappings for STM32G474 VREFBUF

#2288 stm32: Add DMAMUX register mappings and request IDs

#2273 stm32/stm32_spi: Add SPI register definitions for STM32G47xxx

#2095 arch: stm32: fix otghs logic to support interface requests

#2010 arch/arm/src/stm32h7/stm32_spi.c: fixed build issue when SPI is configured

STM32L4

#2232 STM32L4 ADC: Add injected channel support.

#2220 STM32L4 TIMER: Add some helper functions

#2178 STM32L4 ADC driver: extenal event configuration

#2068 STM32L4: Improvements on ADC driver

STM32L5

#3090 stm32l5: Optional LSE xtal drive strength ramp-up

S32K1XX

#2900 s32k1xx: Support ramfunc

IMX6

#2595 Add imx_enet driver

IMXRT

#2929 iMXRT: changes to FlexCAN driver support

#2471 imxrt: Support serial single-wire mode and fix parity settings

#2461 arch/imxrt: Added NETDEV_LATEINIT option for Ethernet

#2354 imxrt: Added support for DP83825I PHY

#2212 arch/arm/src/imxrt: adds support for WDOG1

RP2040

#3002 arm/rp2040: SPI driver DMA transfer support

#2952 arm/rp2040: Add I2C driver support

#2916a rm/rp2040: Raspberry Pi Pico SMP support

#2986 arm/rp2040: Add SPI driver support

NRF52

#2189 nrf52_spi: support unconnected MISO/MOSI pins

#2705 nrf52: Add a static copy buffer for i2c NOSTART transfers

#2674 nrf52_i2c: add support for I2C_M_NOSTOP and I2C_M_NOSTART flags

#2717 I2C bitbang driver (and nRF52 implementation)

#2756 nrf52: add stackcheck support

#2712 nRF52: support stack coloration

#2735 nRF52: add support for building SoftDevice BLE controller

#2182 nrf52: support configuring no console/serial

#2207 nrf52: add POWER register definitions; support enabling DC/DC regulator

#2149 nrf52832: add errata mitigation code for various RADIO issues

#2148 nrf52_wdt: split into low-level API and watchdog driver lower-half

#2270 nRF52 SPI improvements

STM32H7

#3207 usbhost: Add usb host tracing strings to stm32h7

#2994 stm32h7: Allow custom clock configuration to use stdclockconfig

#2955 stm32h7:Add DBGMCU missing from master

#2880 arch/stm32h7: add definitions for DAC

Renesas

RX65N

#2469 USB Host Driver Support

Risc-V

#2470 risc-v: Introduce basic setjmp support

RV64

#2928 arch:rv64:add API up_copyfullstate for later FPU support

#3018 arch:rv64:c906:enable DP FPU support

#3073 arch:rv64:c906:demo protect build without the PMP

#3203 arch:rv64:c906:add risc-v PMP and change mem map for protect build.

ESP32C3

#3006 esp32-c3: Adds timer driver

#2901 esp32c3: Add system reset.

#2870 Support for ESP32-C3 GPIO Driver

#2965 ESP32XX: Add more flash options to esptool

#3007 risc-v/esp32-c3: complements serial driver

#3160 riscv/esp32c3: Add standard C atomic function

#3126 risc-v/esp32-c3: Add support to SPI Flash

#2875 risc-v/esp32c3: Add support for Main System Watchdog Timer

#3040 riscv/esp32c3: Add ESP32-C3 WLAN netcard driver

#3028 ESP32-C3: Add I2C drive

#3029 risc-v/esp32-c3: Adds termios support

BL602

#2669 risc-v/bl602 : add gpioirq、 i2c(master) driver.

#2836 :risc-v:bl602:add support for elf file apps

#2991 risc-v/bl602: Add wifi and ble support

#2659 arch/risc-v/bl602 : add spiflash(hardware sf controller)

#2809 arch:risc-v:bl602: enable FPU for this target.

#2804 arch/risc-v/bl602: spi_master support.

#2655 arch/risc-v/bl602 : add pwm onshot watchdog driver

#2633 BL602: Add support for system reset modes

#2614 bl602: Update register maps and lower half drivers

Xtensa

#2014 Add the optional interrupt stack to the Xtensa architecture

#1933 Add support to PSRAM using SPIRAM interface

#2352 Print the bakctrace on assertions

#2504 Get full backtrace from interrupts.

#3015 hostfs: Make host_stat populate st_size

ESP32

#3003 Re-organise the different heap regions

#2999 Add WPA2 Enterprise and WPA3 support

#2939 Refactor ESP32 WiFi driver to support station and softAP coexistence

#2947 esp32_ummap: write back spiram cache before calling Cache_Flush

#2965 Add more flash options to esptool

#2983 Extract memory layout definitions to a separate header

#2979 Add support for I2C tracing

#2840 Add esp32_gpio_matrix_in/out to replace ROM functions

#2831 Writeback PSRAM data when mapping SPI Flash address to ESP32's address bus

#3048 timer driver refactor

#2858 Fix a memory leak when discarding a large packet.

#2716 Add AES hardware accelerator driver

#2613 Added driver api to reload counter instantly

#2721 Add efuse driver

#2514 allows the rtc wdt to be configured in bootloader and used later

#2550 enables started flag if the wdt was turned on in bootloader

#2515 Added support for RTC WDT

#2474 Optimize IRAM usage based on esp-idf

#1945 Added Timer Support

#1978 Add power management of deep-sleep

#2269 Add high memory support to work with PSRAM

#2294 Refactor ESP32 Wi-Fi driver

#2296 added support to automonitor by capture

#2074 Add real-time timer support for WiFi

#2138 Add Partition and OTA device

#2199 SPI Flash driver uses global sem for all MTD

#2224 Add SPI Flash hardware encryption I/O support

#2242 Watchdog support (MWDTs)

#2234 Include cache workaround to PSRAM

#1958 When PSRAM is enabled allow drivers and tasks to allocate memory from a separate internal memory

#1942 Implement BASIC reset logic

#1893 xtensa/esp32: Add ESP32 WiFi adapter and driver

Minor changes

Xtensa

#2454 esp32/esp32-core: Fix #ifdef warning and update MM_SECTIONS

Simulator

New Features

#2129 add "nimble" config, to test nimBLE on top of bthcisock
#3152 add dlsym to nuttx-names.in
#2164 add LVGL configuration which uses the X11 framebuffer and mouse
#3093 add heap policy and asan logic to support mm debug on sim platform
#2619 hci: reuse the reserved fields of hci buffer
#2696 hcitty: add hcitty adapter
#2158 linux I2C bus support in sim
#2579 make it conditional with FS_FAT
#2599 names: add writev/readv into name list
#3478 refactor signal handling
#2130 rpproxy/rpserver: force use 'CONFIG_SIM_M32' for 64bit system.
#2198 support LCD emulation over X11; correctly decouple LCD/FB from X11/NX
#2690 support sim vfork

#3231 add the simulated lower-half FOC device

#3224 boards/sim: remove dsptest configuration

#2720 board/sim: Support NuttX BLE stack through uart shim driver

Fixes

#2441 sim: fix input handling and add simulated buttons support from mouse

#2109 Revert "arch/sim: Make the SIGUSR1 host signal use the NuttX irq logic"

#2259 boards/sim: add atexit(2) into naming list

#2246 boards/sim/sim/sim/src/sim_touchscreen.c: add missing nx_disconnect

#2597 Revert "board/sim: Remove the too strict warning"

#3176 sim: fix signal deliver calling error on sim platform

#3205 sim: do not exit simulator on up_assert (just let the task exit)

Documentation

New Features

#2408 Documentation: support versioned docs

#3127 Documentation: add ESP32 and DevKitC docs

#1955 Add documentation for note filters and task trace guides

#2268 Documentation for Watchdog Timer Driver

#3490 Documentation/esp32: Add supported peripherals

#1959 Documentation for the Timer Driver

#3138 Addind CMake based C++ project example in documentation

#2543 Documentation: how to use auto monitor feature to keep the chip alive

#3022 hostfs: Document the backends and restrictions

#2819 Documentation: document nRF52832 Sparkfun board (improve MDK board a bit)

#2818 Documentation: introduce hardware platforms documentation

#2334 CONTRIBUTING.md: talk about preferred commit message format

Improvements

#2390 Documentation: improve debugging section

#2485 Documentaiton: merge quickstart to getting started

#2045 Documentation: Misc fixups for broken links, errors, warnings

#2329 Documentation/components/drivers/character/pwm: fix pwm.c location

#2031 Documentation/quickstart/debugging.rst: rewrite JTAG/OpenOCD section

#2106 documentation: change non-working URL

#2362 Documentation improvements

#3470 Documentation: migrate ESP32 README to docs

#3144 CI: remove linkcheck when building docs

#2051 Documentation/quickstart/debugging: rewrite SWD sentence

#2026 Documentation: Remove all tail spaces from *.rst and *.html

#3194 Documentation: add syslog user API and other minor improvements

#2027 Documentation: Reorganize some section

#2021 Correct the links in Documentation folder

#2024 Fix broken documentation links

#3180 documentation: improve boardctl() docs

#2563 update Documentation/components/drivers/character/watchdog.rst

#3271 docs and comments: Update stale references to COPYING

Driver Support

Bug Fixes

#2850 audio: Introduce a driver-specific spinlock to cxd56.c

#2950 audio: pcm_decode: add RAW format support

#2564 audio: uninitialize usermq to NULL when the device has not

#2445 audio: Make audio_null play at real speed

#2223 audio: cxd56: cleanup for the spresense audio implementation

#2070 bluetooth: support HCI/L2CAP sockets, support HCI RAW channel

#2571 bluetooth: Fix bt_buff lifecycle

#3110 can: Add CAN FD flags to CAN header

#2664 can: fix RTR ioctl and support timeout

#3214 can: Fix TX ID bits 18-20 of mcp2515 can driver

#3475 input: Add INPUT_TOUCHSCREEN config

#3482 input: Rename config from INPUT classes

#2490 leds: ws2812: make frequency selection more flexible

#2508 leds/ws2812: optimize reset bytes

#2208 lcd: add optional putarea()/getarea() operations

#2139 lcd: Ssd1306 cleanup

#2200 lcd: Minor fixes to ssd1306 i2c driver

#2188 lcd_dev: put header in correct location; fix missing const

#2989 mmcsd: Fixes race condition in event wait logic of SDMMC driver

#3047 mmcsd: Stuck in 1-bit mode, Removed CONFIG_ARCH_HAVE_SDIO_DELAYED_INVLDT

#3269 motor: Add support for motor debug messages

#2345 mtd/mtd_progmem.c: fix progmem_log2 parameter type to match prototype

#2775 mtd: w25qxxxjv.c : W25Q256's sector count is 8192

#2801 mtd:w25qxxxjv.c: use different protect bits and address lengts

#2776 net/encx24j600.c: Correct setting of ifstate

#2142 note: Add task name record for task trace

#2146 pipes: nx_pipe syscall takes three params, also use nx_close

#2636 pipes: pty shouldn't call nx_pipe and then file_detach in kernel space

#2370 rc: fix bug about lirc_read

#2398 rptun: fix rptun rpmsg_unregister_callback fault

#2315 sensors: add common circular buffer management

#2215 sensors: add new feature about sensor driver model

#2039 sensors: add unified management for sensor

#2715 sensors: bmp280: convert to sensor interface (and minor sensor change)

#2711 sensors: bmp280: minor fixes

#2907 sensors: driver model update

#3000 sensors: fakesensor support batch

#2369 sensors: support custom types of sensor

#3118 sensors: qencoder.c - Remove bad sninfo() format string

#2318 sensors: update l3gd20 sensor driver with new sensor driver model

#2343 serial: Prevent RX stall

#2617 serial: should include <signal.h> explicitly

#2036 serial: break from read after closing

#3195 serial: Don't comment out ws_[x|y]pixel field from winsize struct

#2698 syslog: Added color output to syslog.

#2621 syslog: Added formatted timestamps in syslog.

#3050 syslog: Added support for multiple syslog channels.

#3020 syslog: add option to prefix process name

#2697 syslog: Added printing of log priority in syslog

#3215 syslog: Drop extra carriage return from syslog calls

#2692 syslog: Prepend Process ID to syslog message

#2710 syslog: Re-arranged syslog fields.

#3226 syslog: Added multi device support in syslog_device.

#3453 syslog: Fix in syslog_intbuffer flushing

#3454 syslog: Proper uninit of syslog_device.

#2961 syslog_rpmsg: fix system crash when open CONFIG_SCHED_HAVE_PARENT

#3201 timers: rtc/rpmsg: support server and client to set time each other

#2383 USB: Do not try to print NULL format strings for verbose trace messages when disabled

#3163 USBDEV: RNDIS: Fix occasional disconnections due to race condition

#3185 USBDEV RNDIS: Fix unaligned access caused by 4f66624

#2691 wireless: bluetooth: add more hci event definitions

#2704 wireless: bluetooth: minor fix for bluetooth driver

#2607 wireless: bluetooth: minor fix to bluetooth stack

#2609 wireless: bluetooth: fix minor issue in bt uart driver

#2201 wireless: gs2200m: Add function to get IWNWID / IWFREQ / IWSENS information

#2747 wireless: gs2200m: Fix _read_data()

#2738 wireless: gs2200m: Print error massages with wlerr()

#2798 wireless: gs2200m: Change retry condition in gs2200m_hal_write()

#2175 wireless: gs2200m: Check disassociation from AP and enable rejoin

#2707 drivers: wireless: Fix ASSERT() in _read_data_len() in gs2200m.c

#2497 crypto/random_pool.c: fix getrandom() when thread calling it gets can…

#2488 crypto/arc4random: rename getrandom to arc4random_buf

#2512 wireless/bluetooth: change the tx thread stack size to DEFAULT_TASK_STACKSIZE

#2611 wireless/bluetooth: Fix vairous issues found in bt uart shim driver

New Driver Support

#2429 audio: add simple wm8994 codec driver

#2282 audio: cxd56: add initial audio SRC implementation

#2301 analog: support for MAX1161X family of I2C 12 bit ADC chips

#2736 console: Add generic support to LWL Console

#2628 efuse: Add generic efuse driver for NuttX

#2166 lcd: Add LCD character driver: allows interacting with LCD directly from userspace

#3230 motor: add generic upper-half driver for Field Oriented Control (FOC)

#1936 note: Add task trace support

#2216 rc: support infrared remote control

#2829 sensor: add fakesensor driver

#3474 sensors: Adds driver for hyt271 sensore module

#1989 sensors: Support fxos8700cq motion I2C sensor

#2091 usbdev: add Android Debug Bridge driver

Board Support

New Board Support

#2877 Support for Raspberry Pi Pico

#2838 Add initial support for ESP32-C3 and ESP32-C3 DevKit board

#3217 board: Add support for nucleo-h743i2

#2503 Re-organise ESP32 boards and introduce two more(ESP-WROVER-KIT and the ESP32-Ethernet-Kit)

#3129 boards/stm32: add initial support for b-g431b-esc1 board

#3234 boards/stm32/common: add support for IHM07M1 and IHM08M1 boards

#2463 boards: Added Teensy-4.x BSP

#2506 stm32: add stm32g43x support and nucleo-g431rb board

#2054 configure.sh: update custom board config build support

Boards With Significant Improvements

ARM

CXD56

#3084 cxd56_gnss: Add missing include header for cxd56_gnss.c

#3085 cxd56_cpu1signal: Fix an issue that gnss does not work

#3024 Spesense CPU activity LED support

#3016 spresense:rndis_smp

#1939 Add cxd56xx intstack for SMP

IMX6

#2997 boards: sabre-6quad: Add netnsh_smp configuration

IMXRT

#2588 teensy-4.x Support for ST7789 controller

#2526 boards/arm/imxrt/teensy-4.x: CDC-ACM console support

#2004 FlexCAN driver for i.MX RT1060 MCU

LPC17XX_40XX

#3239 board/arm/lpc17xx_40xx/mbed: Add userleds driver support

NRF52

#2706 board/nrf52-feather: Add simple i2c test configuration

RP2040

#3021 add INA219 support

#2894 boards: raspberrypi-pico: Add nshsram defconfig for SRAM build

#2884 Update raspi-pico

#3067 boards/raspberrypi-pico: Pico Display Pack (ST7789 LCD) support

#3030 boards/raspberrypi-pico: Support ENC28J60 SPI ethernet board

#3014 BMP180 sensor support to RP2040

SAM34

#2464 Added: MT29F2G Nand Flash block driver for sam4s-xplained-pro

STM32

#3097 Add configuration for testing the Sporadic Scheduler.

#3064 boards: refactor for nucleo-f446re and nucleo-f302r8 boards

#3053 Nucleo-F446RE: added support for CAN driver

#3225 stm32/stm32_adc: various improvements for ADC

#3223 stm32/stm32_pwm: add interfaces to access RCR register and TRGO

#3232 stm32/stm32_foc.c: add the lower-half FOC device support

#3222 stm32/stm32_serial: add support for TX DMA and some improvements

#2505 boards/arm/stm32/stm32f103-minimum: cleanup

#2433 Add 2.4 Inch TFT LCD Shield ILI9341 for nucleo-l152re, 8080 MCU 8-bit

STM32L4

#2009 Added STM32L432KC DAC support

#2842 board: nucleo-l432kc: Add missing i2c_master_s definition

#2837 Add missing I2C3 support on nucleo-l432kc board

STM32F4

#3056 Add LCD1602 Backpack to common board

#3052 Add support to LCD ST7789 on STM32F4Discovery

#2699 boards/stm32f4discovery: Add a LWL board profile and improve the README.txt

#2553 boards: stm32f4discovery: Add adb configuration

STM32F7

#3218 Integration of pysimCoder with NUTTX

KINETIS

#2847 board/freedom-k64f: Add usbdev support with cdcacm example

#1977 freedom-k64f: Support raw binary firmware format

#1980 freedom-k64f: Add renew DHCP client for netnsh

#2037 freedom-k64f: Add demo configuration

#2047 freedom-k64f: Add I2C to demo image

#1982 freedom-k64f: Add I2C initial support

RISC-V

BL602

#2764 boards: bl602evb flash and debug notes

C906

#3027 board:rv64:c906:support the ELF apps

ESP32C3

#2897 boards/esp32c3: Add tmpfs mounting when bringing up

#2879 risc-v/esp32c3: Enable stdio buffering for esp32c3-devkit NSH config

#3261 esp32-c3: Add support to RNG peripheral

XTENSA

ESP32

#2883 This commit implements I2C support for ESP32 (wrover kit)

#2864 Add wapi_smp to test Wi-Fi in SMP mode

#2971 esp32: Add board config to support MCP2515

#3071 ESP32: Mount TMPFS on board bring up

#2888 This commit enables BMP180 suport for ESP32

#2753 esp32: Enable renew for "wapi" configs

#3270 xtensa/esp32: Refactor register access functions on SPI driver

#3303 esp32-devkitc: Add BMP180 sensor support

#3192 esp32-devkitc: Make nsh the entry-point of the ostest config

#3211 esp32-devkitc: Add GPIO board support

#3190 risc-v/esp32c3: Support ESP32-C3 wireless ioctl cmd

#3164 xtensa/esp32: Adds oneshot timer driver.

#3117 xtensa/esp32: Use Polling instead of DMA for transfers below threshold

#3154 ESP32: Add Button support via BOOT button on GPIO0

#3139 xtensa/esp32: Support esp32 wireless ioctl cmd

#3095 ESP32: Allow a BSS section to reside in external memory

#2507 boards/arm/stm32: add common and stm32f103-minimum support for WS2812

TIVA

#2684 boards: lm3s6965-ek: Add iperf to discover/defconfig

Minor Board Changes

#2558 boards: Remove CINCPATH and CXXINCPATH

ARM

#2079 Stm32 oled fixes pr

#2360 stm32/stm32ldiscovery: modernize board init little bit

#2500 stm32/common: devpath not long enough for apa102 and veml6070

CXD56

#2193 cxd56xx: Remove HOSTCC and HOSTCFLAGS from Make.defs

#2356 Fix lc823450

#2353 Fix of the OTG FS HOST for nucleo-h743zi

#2030 freedom-k64f: Fix k64_buttons.c

#1969 freedom-k64f: Init PWM only if enabled

#1999 freedom-k64f: Register on board sensor driver

#2020 freedom-k64f: Declare k64_i2cdev_initialize function

#3074 esp32c3-devkit: Use nx_mount to avoid overriding errno

Xtensa

#2802 ESP32: Refactor of POSTBUILD action

#2127 esp32: Added Userled support

#3288 esp32-wrover-kit: Don't use User GPIO Subsystem to control LED

#3442 esp32 boards: BUTTON_BOOT should use PULLUP instead PULLDOWN

#3263 esp32: Move the WLAN initialisation to the common directory.

File System

Bug Fixes

#3105 fs/epoll: correct the return value of epoll_ctl(2)

#2956 fs/mount: fix mount cmd break out when meet stat error

#3042 fs: vfs : Do some adjustments for epoll

#2317 fs: flashback to release all file descriptors in group to increase debugging time.

#2540 fs: Skip call fs_checkfd if fd < 3 in fs_fdopen

#3137 fs/littlefs: Suppport the duplication function

#2724 fs/tmpfs: Iterate the entry reversely in readdir

#2852 fs: Merge fs_poll into poll_fdsetup

#3060 fs: find_blockdriver: Don't ferr() on MTDs

#3070 fs/mmap: Return EACCES for incompatible file descriptors

#3069 fs/mmap: Clarify MAP_PRIVATE dependency on CONFIG_FS_RAMMAP

#2861 fs: change geometry sizes from size_t to uint32_t

#2260 fs: eventfd: remove the unique minor limit

#2073 fs: epoll_create: modify return value for epoll_create1

#2913 fs/lfs: lfs_file_sync() when littlefs_open

#2810 fs: eventfd: Convert the indent under EVENT_FD_VFS_PATH option to tab

#2854 fs: Don't call _NX_SETERRNO in fopen and fdopen

#2339 Revert "fs/nxffs: Fix scan good block slowly and scan an invalid block"

#2572 fs: spiffs fixes

#3491 fs: vfs: adjust the error code of write to be consistent with read

#3444 fs/romfs: fix open zero-byte file fail issue

#2532 fs/unionfs: remove excessive protection to avoid deadlock

#2618 fs: remove INODE_IS_SPECIAL() use INODE_IS_PSEUDODIR instead

#2606 fs: Fix inode lock at umount2

#2638 fs: fs_dupfd2 should return OK if fd1 equals fd2

#2639 fs: Let files_allocate return -EMFILE instead ERROR

#2640 fs: Remove _files_close and reuse file_close

#2643 fs: Fix the race condition in file_dup

#2648 fs: Remove the special hack for pty in nx_vopen

#2660 fs: Reimplement file_open to not depend on nx_open

#2662 fs/inode/fs_files.c: fix DEBUGASSERT in romfs

#2667 fs: Make nx_vxxx and file_vxxx as internal functions

#2661 fs: file_dup2 shouldn't hold the file list lock

#2739 fs/readdir: Must reserve a byte for the NUL terminator

Significant Improvements

#2598 fs/epoll: add asynchronous epoll control support

#3045 fs: Allocate file/socket dynamically

#2841 fs: procfs meminfo improvements

#2957 fs: mqueue: add poll support

#3212 fs/lfs: Update version to 2.4.0

Networking

Applications

Improvements

#2414 net: tcp: implement the fast retransmit

#3257 net: tcp: support bind the same port with different domain

#2548 net: tcp: optimize TCP handshake performance

#3113 net: usrsock: add send multi-elements support

#2899 net: socket: Unify socket into file system to avoid the code duplication

#2695 netpacket: if_addr: add interface address header

#3081 tcp_send_buffered.c: improve tcp write buffering

#3025 net: Add sendmsg and recvmsg to syscall list

#2417 net: wireless: add country code control support

#2964 net: socket_rpmsg: add socket rpmsg support

#2415 net: gmp: add MULTICAST_TTL support

Bug Fixes

#2257 net: callback: remove the assert check of conn instance

#3043 net: local: Remove local_send.c since nobody use it now

#3221 net: tcp: tcp_send_buffered.c: Fix non-blocking I/O

#3100 net: tcp: correct the port byte order

#3106 net: if: remove the macro expansion of the public structure

#3104 net: dev: check the available address further

#3101 net: arp: add timeout to avoid infinite send wait

#2489 net: tcp: send the ACK in time after obtain ahead buffer from iobs

#3099 net: tcp: dup: do not start the tcp monitor if unestablished

#3103 net: tcp: reset the connection ref count before tcp_free()

#2688 net: Remove duplicate forward references

#2911 net: fix a few DP83848C and DP83825I constants

#2978 telnet: fix crash about telnet client connect

#3254 net: arp: Fix arp

#2959 net: socket: move si_send/recv into sendmsg/recvmsg

#2869 netdb.h: Add NI_MAXHOST and NI_MAXSERV

#3037 Revert "net: tcp: Add DEBUGASSERT() in psock_tcp_send()"

#2075 net: TCP-stack fix for stalled tcp sockets due to broken keepalive

#2121 net: devif: devif_callback.c: remove harmful debug check

#1589 net: tcp: fix tcp socket close timeout if loss wireless connection

#2332 net/tcp: Rectified keepalive fix

#2811 net/local: Add an option to specify the prefix of named pipe

#3062 net: tcp_sendfile.c: Remove an unused copy of CONFIG_NET_TCP_SPLIT_SIZE

#3044 net: fix local_sendmsg return length

#2774 net/ip: do not drop the udp packet from IP layer

#2466 net/igmp: add sanity check to handle allocate fail

#2467 net/sockopt: Try usrsock further if the protocol not available

#2465 net/procfs: handle opendir("/proc/net/") correctly

#2421 net/neighbor/neighbor_ethernet_out.c: fix build error without ICMPv6

#2416 net/tcp: fallback to unthrottle pool to avoid deadlock

#2413 net/tcp: correct the available iobs count if throttle is enabled

#2412 net/icmp: add sanity check to avoid wild data length

#3319 tcp_netpoll.c: Fix a performance issue with CONFIG_NET_TCP_WRITE_BUFFERS

Security Issues Fixed In This Release

Compatibility Concerns

Changes to Build System

Change CFLAGS, CPPFLAGS, CXXFLAGS, and AFLAGS from Recursive to Simple Assignment

PR-1890 (commit 2caf3a69e3d60ec550980f7ba897c732e7a39df7) attempts to speed up compilation time for concurrent builds by changing assignment to makefile variables CFLAGS, CPPFLAGS, CXXFLAGS, and AFLAGS from recursive (=) to simple (:=). This causes these compile options to be expanded only once during the build.

If you are using NuttX on a custom board not in the NuttX repository, you may want to make a similar change to your Make.defs files. Change these recursive assignments:

Markdown

# What's New In This Release

## Highlights

* Better separation between kernel and userspace.
* Heap and stack management improvements.
* More closely follow POSIX and Linux interfaces.
* Symmetric Multi-Processing (SMP) performance improvements and bug fixes.
* Networking improvements and bug fixes.
* Added support for many microcontrollers and boards, and improved support for many existing ones.
* Many added and improved drivers.
* Build system improvements to deliver faster builds.
* Thousands of NuttX files converted to Apache 2.0 License with permission of their authors.
* Improved listing of 3rd party licenses used in NuttX (see LICENSE, NOTICE, and DISCLAIMER-WIP files).

## Major Changes to Core OS

### New Features
* [#2324](https://github.com/apache/incubator-nuttx/pull/2324) audio: libsamplerate: add initial audio Sample Rate Converter
* [#2820](https://github.com/apache/incubator-nuttx/pull/2820) arch, boards, drivers, include, sched, wireless: Change spinlock APIs.
* [#2885](https://github.com/apache/incubator-nuttx/pull/2885) Ensure the kernel component don't call userspace API

### Bug Fixes
* [#1852](https://github.com/apache/incubator-nuttx/pull/1852) sysconf: add _SC_PAGESIZE sysconf support
* [#1922](https://github.com/apache/incubator-nuttx/pull/1922) sched: nxtask_start should call entry point directly for kernel thread
* [#1994](https://github.com/apache/incubator-nuttx/pull/1994) libc: Don't fclose and fopen file in freopen
* [#2005](https://github.com/apache/incubator-nuttx/pull/2005) Fix note_syscall_leave_s to avoid unaligned access
* [#2043](https://github.com/apache/incubator-nuttx/pull/2043) sched: Add SCHED_INSTRUMENTATION_HIRES support
* [#2044](https://github.com/apache/incubator-nuttx/pull/2044) sched: Add note_syscall args support
* [#2071](https://github.com/apache/incubator-nuttx/pull/2071) pollnotify: we should send poll events before semaphore incrementes.
* [#2076](https://github.com/apache/incubator-nuttx/pull/2076) libc: math: Make this friendly with libcxx
* [#2111](https://github.com/apache/incubator-nuttx/pull/2111) LIBCXX related fixes
* [#2147](https://github.com/apache/incubator-nuttx/pull/2147) sched: Use nx_close() inside OS
* [#2176](https://github.com/apache/incubator-nuttx/pull/2176) syscall/syscall.csv: Increase number of arguments for prctl()
* [#2204](https://github.com/apache/incubator-nuttx/pull/2204) sched: irq: Fix enter_critical_section() in an irq handler for SMP
* [#2218](https://github.com/apache/incubator-nuttx/pull/2218) sched: signal.h: fix compile failed when open TTY_SIGINT
* [#2229](https://github.com/apache/incubator-nuttx/pull/2229) sched/sched/sched_waitid.c: Allow WNOHANG
* [#2236](https://github.com/apache/incubator-nuttx/pull/2236) sched/task/task_exithook.c: Remove a redundant assignment
* [#2243](https://github.com/apache/incubator-nuttx/pull/2243) libcxx: Update [0001-libcxx-Port-to-NuttX-https-nuttx.apache.org](http://0001-libcxx-Port-to-NuttX-https-nuttx.apache.org)-RTOS.patch
* [#2255](https://github.com/apache/incubator-nuttx/pull/2255) sys/epoll: sync the epoll define with linux
* [#2256](https://github.com/apache/incubator-nuttx/pull/2256) unistd/sched_sporadic: correct the disable value
* [#2261](https://github.com/apache/incubator-nuttx/pull/2261) sched/timer: add support of CLOCK_MONOTONIC
* [#2262](https://github.com/apache/incubator-nuttx/pull/2262) sched/init: init the default home directory to environment
* [#2285](https://github.com/apache/incubator-nuttx/pull/2285) libc/stdlib: Fix range check in strtoul(l)
* [#2326](https://github.com/apache/incubator-nuttx/pull/2326) libc: Enhance getopt function
* [#2407](https://github.com/apache/incubator-nuttx/pull/2407) libc: machine: arch: Support armv8-m relocation
* [#2418](https://github.com/apache/incubator-nuttx/pull/3447) libc: Change OK/ERROR from macro to enum
* [#2420](https://github.com/apache/incubator-nuttx/pull/2420) sched/signal: Remove redundant checks
* [#2437](https://github.com/apache/incubator-nuttx/pull/2765) sched/sched/sched_waitpid.c: Fix return value
* [#2449](https://github.com/apache/incubator-nuttx/pull/2449) mm/circbuf: fix the problem of dividing by zero
* [#2450](https://github.com/apache/incubator-nuttx/pull/2450) unistd/getopt: remove number of arguments limit
* [#2451](https://github.com/apache/incubator-nuttx/pull/2451) libc: pthread_mutexattr_getprotocol: modify prototype
* [#2455](https://github.com/apache/incubator-nuttx/pull/2455) sched/sched/sched_waitpid.c: Discard the correct child entry
* [#2475](https://github.com/apache/incubator-nuttx/pull/2475) sched/sched_waitid.c: Fix two bugs when CONFIG_SCHED_CHILD_STATUS is enabled
* [#2487](https://github.com/apache/incubator-nuttx/pull/2487) sched: clock/time: add CLOCK_BOOTTIME definition
* [#2492](https://github.com/apache/incubator-nuttx/pull/2492) procfs: make array const to reduce memory use
* [#2494](https://github.com/apache/incubator-nuttx/pull/2494) sched: Fix SMP
* [#2509](https://github.com/apache/incubator-nuttx/pull/2509) libc: net: implement ether_aton/ether_aton_r
* [#2517](https://github.com/apache/incubator-nuttx/pull/2517) sched: spinlock: Introduce SP_WFE() and SP_SEV()
* [#2518](https://github.com/apache/incubator-nuttx/pull/2518) sched: Don't forward gettid to getpid directly
* [#2530](https://github.com/apache/incubator-nuttx/pull/2530) libc: Implement posix_fallocate
* [#2533](https://github.com/apache/incubator-nuttx/pull/2533) sched: Make the number of queue/signal used by irq handler configurable
* [#2534](https://github.com/apache/incubator-nuttx/pull/2534) libc: Implement getppid
* [#2538](https://github.com/apache/incubator-nuttx/pull/2538) sched: pthread: Fix potential bugs in pthread_condclockwait.c
* [#2574](https://github.com/apache/incubator-nuttx/pull/2574) libc: dumpbuffer: dump buffer enhancement
* [#2580](https://github.com/apache/incubator-nuttx/pull/2580) sched: arch & sched: task: Fix up_exit() and nxtask_exit() for SMP
* [#2585](https://github.com/apache/incubator-nuttx/pull/2585) libc: netdb: Move hostbuffer out of the stack
* [#2602](https://github.com/apache/incubator-nuttx/pull/2740) sched: Add include/sys/poll.h
* [#2604](https://github.com/apache/incubator-nuttx/pull/2604) libc: Add b64_ntop and b64_pton implementation
* [#2616](https://github.com/apache/incubator-nuttx/pull/2616) libc/dumpvbuffer: update the vector ptr correctly
* [#2624](https://github.com/apache/incubator-nuttx/pull/2624) sched: implement the default test-and-set semantics
* [#2627](https://github.com/apache/incubator-nuttx/pull/2627) OS internal function should indicate the error by return negative value
* [#2630](https://github.com/apache/incubator-nuttx/pull/2630) libc: net: implement socketpair
* [#2631](https://github.com/apache/incubator-nuttx/pull/2631) sched: mqueue: simplify the mqueue reailize
* [#2650](https://github.com/apache/incubator-nuttx/pull/2650) libc: ctype/iscntrl: correct the control character function
* [#2653](https://github.com/apache/incubator-nuttx/pull/2653) sched: Don't call sched_lock()/unlock() in nx_waitid()/waitpid() for SMP
* [#2668](https://github.com/apache/incubator-nuttx/pull/2668) Kernel module should prefer functions with nx/kmm prefix
* [#2675](https://github.com/apache/incubator-nuttx/pull/2675) libc: Add placement new and new[] function
* [#2693](https://github.com/apache/incubator-nuttx/pull/2693) libxx: use built-in __aeabi_atexit() if LIBSUPCXX is enabled
* [#2694](https://github.com/apache/incubator-nuttx/pull/2694) libc/machine/arch: fix build break if enable armv8 ELF
* [#2719](https://github.com/apache/incubator-nuttx/pull/2719) sched/task: setup the scheduling policy to task
* [#2726](https://github.com/apache/incubator-nuttx/pull/2726) sched: sched: Remove sched_lock/unlock from nxsched_set_affinity()
* [#2737](https://github.com/apache/incubator-nuttx/pull/2737) sched: task: Fix a potential bug in nxtask_assign_pid()
* [#2740](https://github.com/apache/incubator-nuttx/pull/2740) sched/timer: get the previous reload value correctly
* [#2741](https://github.com/apache/incubator-nuttx/pull/2741) libc: unistd/fpathconf: enhance fpathconf
* [#2742](https://github.com/apache/incubator-nuttx/pull/2742) libc: pthread/cond: enhance pthread_cond_destroy
* [#2744](https://github.com/apache/incubator-nuttx/pull/2744) sched: task: Fix comments and label in nxtask_assign_pid()
* [#2765](https://github.com/apache/incubator-nuttx/pull/2765) sched: pthread: Return get_errno instead the hardcode value
* [#2767](https://github.com/apache/incubator-nuttx/pull/2767) sched/wqueue/notifier: protect the work notifier with critical section
* [#2797](https://github.com/apache/incubator-nuttx/pull/2797) sched: group: Fix group_kill_children() for SMP
* [#2849](https://github.com/apache/incubator-nuttx/pull/2849) mqueue: Add _MQ_OPEN, _MQ_CLOSE and _MQ_UNLINK macro
* [#2855](https://github.com/apache/incubator-nuttx/pull/2855) libs: Remove the duplicated _NX_ and _MQ_ macro
* [#2865](https://github.com/apache/incubator-nuttx/pull/2865) libc: :machine:risc-v:unifying elf relocation code
* [#2872](https://github.com/apache/incubator-nuttx/pull/2872) sched: pthread: Fix pthread cmdline issue
* [#2881](https://github.com/apache/incubator-nuttx/pull/2881) libc: Move stack check stuff from libc/stdlib/ to libc/assert/
* [#2904](https://github.com/apache/incubator-nuttx/pull/2904) libc: unistd/getcwd: enhance getcwd when buf is NULL
* [#2906](https://github.com/apache/incubator-nuttx/pull/2906) mm: umm_heap: valloc: support valloc (LEGACY)
* [#2910](https://github.com/apache/incubator-nuttx/pull/2910) libc/hex2bin: fix handling of segment offsets
* [#2919](https://github.com/apache/incubator-nuttx/pull/2919) sched: fix fd leak in dlopen
* [#2938](https://github.com/apache/incubator-nuttx/pull/2938) libs: misc: Remove critical section in lib_filesem.c for SMP
* [#2942](https://github.com/apache/incubator-nuttx/pull/2492) mtd: progmem: Add up_progmem_read callback guarded by ARCH_HAVE_PROGMEM_READ
* [#2946](https://github.com/apache/incubator-nuttx/pull/2946) sched: task: Call nxtask_flushstreams() without critical section
* [#2960](https://github.com/apache/incubator-nuttx/pull/2960) sched: signal: sigdeliver: fix system block when kill signal to idle in SMP
* [#2980](https://github.com/apache/incubator-nuttx/pull/2980) include: Add iso646.h for alternative spellings
* [#2981](https://github.com/apache/incubator-nuttx/pull/2981) sched: Remove all group id related stuff
* [#3033](https://github.com/apache/incubator-nuttx/pull/3033) unistd: Fix getpriority not handling invalid input value
* [#3080](https://github.com/apache/incubator-nuttx/pull/3080) sched: semaphore: Remove a redundant critical section in nxsem
* [#3083](https://github.com/apache/incubator-nuttx/pull/3083) libc: stdio/lib_clearerr: Did not clear stream buffer flags in clearerr
* [#3086](https://github.com/apache/incubator-nuttx/pull/3086) mm: improve the memory manager modularity and reduce the information explosion
* [#3111](https://github.com/apache/incubator-nuttx/pull/3111) sched: Sporadic scheduler: Fix time calculation and compile errors when assertions are enabled:
* [#3115](https://github.com/apache/incubator-nuttx/pull/3115) libc: time: localtime: fix race condition
* [#3121](https://github.com/apache/incubator-nuttx/pull/3121) mm/heap: Move semaphore related declaration to private header
* [#3123](https://github.com/apache/incubator-nuttx/pull/3123) sched: pthread: Remove a redundant critical section in pthread_condclockwait.c
* [#3131](https://github.com/apache/incubator-nuttx/pull/3131) mm: Minor fix for heap manager
* [#3159](https://github.com/apache/incubator-nuttx/pull/3159) mm: mm_heap: Remove critical section in mm_sem.c
* [#3170](https://github.com/apache/incubator-nuttx/pull/3170) libc: Move getopt() variables into TLS
* [#3196](https://github.com/apache/incubator-nuttx/pull/3196) sched/signal: Implement SA_NODEFER
* [#3228](https://github.com/apache/incubator-nuttx/pull/3228) mm/mm_heap: fix compile failed when open DEBUG_MM
* [#3244](https://github.com/apache/incubator-nuttx/pull/3244) libdsp: Improvements for libdsp and support for fixed16 libdsp implementation
* [#3247](https://github.com/apache/incubator-nuttx/pull/3247) sched: Move the default Task Stack size to Stack menu
* [#3251](https://github.com/apache/incubator-nuttx/pull/3251) libc: update pthread_once according to the specification
* [#3253](https://github.com/apache/incubator-nuttx/pull/3253) libc pthread: Fix pthread_rwlock_init return error
* [#3268](https://github.com/apache/incubator-nuttx/pull/3268) libdsp/fixed16: add open-loop handler
* [#3272](https://github.com/apache/incubator-nuttx/pull/3272) libc: Implement getopt_long() and getopt_long_only()
* [#3280](https://github.com/apache/incubator-nuttx/pull/3280) libc: Correct some getopt() logic
* [#3289](https://github.com/apache/incubator-nuttx/pull/3289) sched: task: Fix to initialize the task-specific data
* [#3294](https://github.com/apache/incubator-nuttx/pull/2418) libc: getopt(): Fix Use of Pointer before NULL check
* [#3299](https://github.com/apache/incubator-nuttx/pull/3299) libc: getopt_common(): Correct handling of unsupported long options.
* [#3308](https://github.com/apache/incubator-nuttx/pull/3308) libc: getopt_long(): Add support for required argument format
* [#3445](https://github.com/apache/incubator-nuttx/pull/3445) libc: update stream getoffset to handle write case
* [#3447](https://github.com/apache/incubator-nuttx/pull/2450) libc: correct zoneinfo genromfs source directory

## Major Changes to the Build System

### New Features
* [#1834](https://github.com/apache/incubator-nuttx/pull/1834) License/authorship handling scripts
* [#2107](https://github.com/apache/incubator-nuttx/pull/2107) build: Makefile should reference CONFIG_HOST_xxx
* [#2392](https://github.com/apache/incubator-nuttx/pull/2392) configure.sh: support custom board build config with absolute path
* [#2824](https://github.com/apache/incubator-nuttx/pull/2824) build/esp32: Create Flash size configuration and a new DOWNLOAD make target
* [#3317](https://github.com/apache/incubator-nuttx/pull/3317) tols: Update python scripts to py3 and lint all of them againt Black

### Bug Fixes

* [#1890](https://github.com/apache/incubator-nuttx/pull/1890) make/expression: improving up asm/C/C++ compile times(make with multi-jobs only)
* [#1940](https://github.com/apache/incubator-nuttx/pull/1940) cygwin build - path issue fix for Renesas arch
* [#2032](https://github.com/apache/incubator-nuttx/pull/2032) build: Change .external_dummy to dummy
* [#2101](https://github.com/apache/incubator-nuttx/pull/2101) build: Add $(OBJS) and $(BIN) to CLEAN macro to clean objects also in subdirectories
* [#2192](https://github.com/apache/incubator-nuttx/pull/2192) build: Move __NuttX__ definition to tools/[Config.mk](http://Config.mk)
* [#2221](https://github.com/apache/incubator-nuttx/pull/2221) tools: Avoid messing the final binary nuttx.(bin,hex,...) compilation msg
* [#2335](https://github.com/apache/incubator-nuttx/pull/2335) build: Parallelize depend file generation
* [#2380](https://github.com/apache/incubator-nuttx/pull/2380) tools: Fix nuttx-gdbinit for armv7-m with FPU
* [#2404](https://github.com/apache/incubator-nuttx/pull/2404) Update checkrelease script to check [readme.md](http://readme.md) instead of .txt
* [#2411](https://github.com/apache/incubator-nuttx/pull/2411) tools: Add 'handle SIGUSR1' to nuttx-gdbinit for the NuttX sim SMP
* [#2432](https://github.com/apache/incubator-nuttx/pull/2432) build system: add missing --obj-path to MKDEP
* [#2557](https://github.com/apache/incubator-nuttx/pull/2557) tools/version.sh: Fix the version retrieved from GIT
* [#2561](https://github.com/apache/incubator-nuttx/pull/2561) tools: Fix version.sh
* [#2642](https://github.com/apache/incubator-nuttx/pull/2642) tools/version.sh: Fix the version retrieved from git-tag
* [#2673](https://github.com/apache/incubator-nuttx/pull/2673) tools: esp32: add a gdb script to show backtrace
* [#2679](https://github.com/apache/incubator-nuttx/pull/2679) tools: esp32: btdecode.sh: Script to decode the Xtensa backtrace.
* [#2701](https://github.com/apache/incubator-nuttx/pull/2701) tools: gdbinit: add support for reporting total and used stack size
* [#2729](https://github.com/apache/incubator-nuttx/pull/2729) tools: esp32: backtrace.gdbscript: Add comments
* [#2803](https://github.com/apache/incubator-nuttx/pull/2803) tools: esp32: Remove some duplicated output
* [#2882](https://github.com/apache/incubator-nuttx/pull/2882) tools: esp32: refine the QEMU image generation.
* [#2895](https://github.com/apache/incubator-nuttx/pull/2895) tools: esp32: fix warnings from ShellCheck
* [#2930](https://github.com/apache/incubator-nuttx/pull/2930) tools: version.sh: If the version is not available, use 0.0.0
* [#2982](https://github.com/apache/incubator-nuttx/pull/2982) tools: nxstyle: Verify relative path in the file header
* [#3004](https://github.com/apache/incubator-nuttx/pull/3004) tools: esp32XX: Delete the Makefile that downloads IDF.
* [#3012](https://github.com/apache/incubator-nuttx/pull/3012) tools: esp32xx: Few fixes/improvements to the post build scripts
* [#3017](https://github.com/apache/incubator-nuttx/pull/3017) tools: esp32: [Config.mk](http://Config.mk): Revert part of "Don't abort make when QEMU script fails"
* [#3094](https://github.com/apache/incubator-nuttx/pull/3094) tools: version.sh: Fix PATCH including extra version

## Architectural Support

### New Architecture

* [#1995](https://github.com/apache/incubator-nuttx/pull/1995) arch: Add custom arch chip build support
* [#2161](https://github.com/apache/incubator-nuttx/pull/2161) Added Support for more TI Tiva Microcontrollers: TM4C123GH6PZ, TM4C123GH6PGE, TM4C129ENCPDT, and TM4C129ENCZAD.
* [#2566](https://github.com/apache/incubator-nuttx/pull/2566) arch/risc-v: Add BL602 support
* [#2974](https://github.com/apache/incubator-nuttx/pull/2974) STM32L5 Architecture Support
* [#3001](https://github.com/apache/incubator-nuttx/pull/3001) arch:riscv64:basic porting for C906
* [#3023](https://github.com/apache/incubator-nuttx/pull/3023) Remove nr5m100 and gap8 support

### Architectures with significant improvements

#### ARM
* [#2042](https://github.com/apache/incubator-nuttx/pull/2042) Fix interrupt stack handlings for ARM SMP
* [#2061](https://github.com/apache/incubator-nuttx/pull/2061) Refactor arm interrupt stack related code
* [#2309](https://github.com/apache/incubator-nuttx/pull/2309) Fix armv7-a L2CC and apply the code to the sabre-6quad board
* [#2876](https://github.com/apache/incubator-nuttx/pull/2876) arm: ARMv6-M vector table offset register support
* [#2932](https://github.com/apache/incubator-nuttx/pull/2932) arch: armv6-m: Apply armv7-m signal handling logic
* [#2944](https://github.com/apache/incubator-nuttx/pull/2944) armv8-m: Fix EXC_RETURN for non-secure usage
* [#2990](https://github.com/apache/incubator-nuttx/pull/2990) arch/armv7-m: Adds dwt helper functions for controlling watchpoints i…

#### CXD56XX
* [#2750](https://github.com/apache/incubator-nuttx/pull/2750) arch: cxd56xx: Add i2c bitbang lower driver
* [#2830](https://github.com/apache/incubator-nuttx/pull/2830) Driver-specific spinlock for cxd56_serial.c

#### STM32
* [#2010](https://github.com/apache/incubator-nuttx/pull/2010) arch/arm/src/stm32h7/stm32_spi.c: fixed build issue when SPI is configured
* [#2095](https://github.com/apache/incubator-nuttx/pull/2095) arch: stm32: fix otghs logic to support interface requests
* [#2177](https://github.com/apache/incubator-nuttx/pull/2177) FLASH waiting cycles are configured based on HCLK.
* [#2180](https://github.com/apache/incubator-nuttx/pull/2180) stm32 - Add register mappings for STM32G474 VREFBUF
* [#2194](https://github.com/apache/incubator-nuttx/pull/2194) stm32 - Add register mappings for STM32Gxxxxx-family DAC
* [#2273](https://github.com/apache/incubator-nuttx/pull/2273) stm32/stm32_spi: Add SPI register definitions for STM32G47xxx
* [#2288](https://github.com/apache/incubator-nuttx/pull/2288) stm32: Add DMAMUX register mappings and request IDs
* [#2325](https://github.com/apache/incubator-nuttx/pull/2325) arch/arm/src/stm32/stm32_serial.c: for flowcontrol use common idiom for enabling/disabling RX interrupts
* [#2473](https://github.com/apache/incubator-nuttx/pull/2473) STM32 - Add ADC register definitions for STM32G4 family
* [#2477](https://github.com/apache/incubator-nuttx/pull/2477) STM32 FLASH latency is calculated based on Vin
* [#2985](https://github.com/apache/incubator-nuttx/pull/2985) stm32 Ethernet hardening

  

#### STM32L4
* [#2068](https://github.com/apache/incubator-nuttx/pull/2068) STM32L4: Improvements on ADC driver
* [#2178](https://github.com/apache/incubator-nuttx/pull/2178) STM32L4 ADC driver: extenal event configuration
* [#2220](https://github.com/apache/incubator-nuttx/pull/2220) STM32L4 TIMER: Add some helper functions
* [#2232](https://github.com/apache/incubator-nuttx/pull/2232) STM32L4 ADC: Add injected channel support.

  

#### STM32L5
* [#3090](https://github.com/apache/incubator-nuttx/pull/3090) stm32l5: Optional LSE xtal drive strength ramp-up

#### S32K1XX
* [#2900](https://github.com/apache/incubator-nuttx/pull/2900) s32k1xx: Support ramfunc

#### IMX6
* [#2595](https://github.com/apache/incubator-nuttx/pull/2595) Add imx_enet driver

#### IMXRT
* [#2212](https://github.com/apache/incubator-nuttx/pull/2212) imxrt: adds support for WDOG1
* [#2354](https://github.com/apache/incubator-nuttx/pull/2354) imxrt: Added support for DP83825I PHY
* [#2461](https://github.com/apache/incubator-nuttx/pull/2461) imxrt: Added NETDEV_LATEINIT option for Ethernet
* [#2471](https://github.com/apache/incubator-nuttx/pull/2471) imxrt: Support serial single-wire mode and fix parity settings
* [#2929](https://github.com/apache/incubator-nuttx/pull/2929) imxrt: changes to FlexCAN driver support
  

#### RP2040  
* [#2916](https://github.com/apache/incubator-nuttx/pull/2916) rp2040: Raspberry Pi Pico SMP support
* [#2927](https://github.com/apache/incubator-nuttx/pull/2927) rp2040: Fix LDFLAGS for boot stage2
* [#2952](https://github.com/apache/incubator-nuttx/pull/2952) rp2040: Add I2C driver support
* [#2986](https://github.com/apache/incubator-nuttx/pull/2986) rp2040: Add SPI driver support
* [#3002](https://github.com/apache/incubator-nuttx/pull/3002) rp2040: SPI driver DMA transfer support
* [#3057](https://github.com/apache/incubator-nuttx/pull/3057) rp2040: Fix SPI halfword DMA transfer

#### NRF52
* [#2148](https://github.com/apache/incubator-nuttx/pull/2148) nrf52_wdt: split into low-level API and watchdog driver lower-half
* [#2149](https://github.com/apache/incubator-nuttx/pull/2149) nrf52832: add errata mitigation code for various RADIO issues
* [#2182](https://github.com/apache/incubator-nuttx/pull/2182) nrf52: support configuring no console/serial
* [#2189](https://github.com/apache/incubator-nuttx/pull/2189) nrf52_spi: support unconnected MISO/MOSI pins
* [#2207](https://github.com/apache/incubator-nuttx/pull/2207) nrf52: add POWER register definitions; support enabling DC/DC regulator
* [#2270](https://github.com/apache/incubator-nuttx/pull/2270) nRF52 SPI improvements
* [#2440](https://github.com/apache/incubator-nuttx/pull/2440) nrf52 ADC: minor fixes
* [#2674](https://github.com/apache/incubator-nuttx/pull/2674) nrf52_i2c: add support for I2C_M_NOSTOP and I2C_M_NOSTART flags
* [#2705](https://github.com/apache/incubator-nuttx/pull/2705) nrf52: Add a static copy buffer for i2c NOSTART transfers
* [#2712](https://github.com/apache/incubator-nuttx/pull/2712) nRF52: support stack coloration
* [#2717](https://github.com/apache/incubator-nuttx/pull/2717) I2C bitbang driver (and nRF52 implementation)
* [#2735](https://github.com/apache/incubator-nuttx/pull/2735) nRF52: add support for building SoftDevice BLE controller
* [#2756](https://github.com/apache/incubator-nuttx/pull/2756) nrf52: add stackcheck support

#### STM32H7
* [#2880](https://github.com/apache/incubator-nuttx/pull/2880) stm32h7: add definitions for DAC
* [#2955](https://github.com/apache/incubator-nuttx/pull/2955) stm32h7:Add DBGMCU missing from master
* [#2994](https://github.com/apache/incubator-nuttx/pull/2994) stm32h7: Allow custom clock configuration to use stdclockconfig
* [#3143](https://github.com/apache/incubator-nuttx/pull/3143) stm32h7: DMA BDMA does not auto disabled on completion
* [#3207](https://github.com/apache/incubator-nuttx/pull/3207) usbhost: Add usb host tracing strings to stm32h7
* [#3458](https://github.com/apache/incubator-nuttx/pull/3458) stm32h7: Adds stm32_dbgmcu.h to match stm32f7 port
* [#3461](https://github.com/apache/incubator-nuttx/pull/3461) stm32h7: Expose flash lock, unlock, and write protect functions to boards

#### STM32F7

* [#2209](https://github.com/apache/incubator-nuttx/pull/2209) stm32f7/stm32_serial.c: fix console re-initialisation if DMA enabled
* [#3489](https://github.com/apache/incubator-nuttx/pull/3489) stm32f7: Freeze tickless timer during debug halt.

#### Renesas
#### RX65N
* [#2469](https://github.com/apache/incubator-nuttx/pull/2469) USB Host Driver Support

#### Risc-V
* [#2470](https://github.com/apache/incubator-nuttx/pull/2470) risc-v: Introduce basic setjmp support
* [#2918](https://github.com/apache/incubator-nuttx/pull/2918) risc-v: up_sigdeliver missing fpu contexts.

#### RV64
* [#2928](https://github.com/apache/incubator-nuttx/pull/2928) rv64:add API up_copyfullstate for later FPU support
* [#3018](https://github.com/apache/incubator-nuttx/pull/3018) rv64:c906:enable DP FPU support
* [#3073](https://github.com/apache/incubator-nuttx/pull/3073) rv64:c906:demo protect build without the PMP
* [#3087](https://github.com/apache/incubator-nuttx/pull/3087) rv64: keep the stack to be 16bytes aligned
* [#3098](https://github.com/apache/incubator-nuttx/pull/3098) rv64:fix 64bit data type and instruction for FPU handlers
* [#3203](https://github.com/apache/incubator-nuttx/pull/3203) rv64:c906:add risc-v PMP and change mem map for protect build.

#### ESP32C3

* [#2870](https://github.com/apache/incubator-nuttx/pull/2870) Support for ESP32-C3 GPIO Driver
* [#2875](https://github.com/apache/incubator-nuttx/pull/2875) risc-v/esp32c3: Add support for Main System Watchdog Timer
* [#2901](https://github.com/apache/incubator-nuttx/pull/2901) esp32c3: Add system reset.
* [#2965](https://github.com/apache/incubator-nuttx/pull/2965) ESP32XX: Add more flash options to esptool
* [#3006](https://github.com/apache/incubator-nuttx/pull/3006) esp32-c3: Adds timer driver
* [#3007](https://github.com/apache/incubator-nuttx/pull/3007) risc-v/esp32-c3: complements serial driver
* [#3028](https://github.com/apache/incubator-nuttx/pull/3028) ESP32-C3: Add I2C drive
* [#3029](https://github.com/apache/incubator-nuttx/pull/3029) esp32-c3: Adds termios support
* [#3040](https://github.com/apache/incubator-nuttx/pull/3040) riscv/esp32c3: Add ESP32-C3 WLAN netcard driver
* [#3126](https://github.com/apache/incubator-nuttx/pull/3126) risc-v/esp32-c3: Add support to SPI Flash
* [#3160](https://github.com/apache/incubator-nuttx/pull/3160) riscv/esp32c3: Add standard C atomic function

  

  

#### BL602
* [#2614](https://github.com/apache/incubator-nuttx/pull/2614) bl602: Update register maps and lower half drivers
* [#2633](https://github.com/apache/incubator-nuttx/pull/2633) BL602: Add support for system reset modes
* [#2655](https://github.com/apache/incubator-nuttx/pull/2655) arch/risc-v/bl602 : add pwm onshot watchdog driver
* [#2659](https://github.com/apache/incubator-nuttx/pull/2659) arch/risc-v/bl602 : add spiflash(hardware sf controller)
* [#2669](https://github.com/apache/incubator-nuttx/pull/2669) risc-v/bl602 : add gpioirq、 i2c(master) driver.
* [#2804](https://github.com/apache/incubator-nuttx/pull/2804) arch/risc-v/bl602: spi_master support.
* [#2809](https://github.com/apache/incubator-nuttx/pull/2809) arch:risc-v:bl602: enable FPU for this target.
* [#2836](https://github.com/apache/incubator-nuttx/pull/2836) :risc-v:bl602:add support for elf file apps
* [#2991](https://github.com/apache/incubator-nuttx/pull/2991) risc-v/bl602: Add wifi and ble support

  

#### Xtensa
* [#1933](https://github.com/apache/incubator-nuttx/pull/1933) Add support to PSRAM using SPIRAM interface
* [#2014](https://github.com/apache/incubator-nuttx/pull/2014) Add the optional interrupt stack to the Xtensa architecture
* [#2352](https://github.com/apache/incubator-nuttx/pull/2352) Print the bakctrace on assertions
* [#2504](https://github.com/apache/incubator-nuttx/pull/2504) Get full backtrace from interrupts.
* [#3015](https://github.com/apache/incubator-nuttx/pull/3015) hostfs: Make host_stat populate st_size

#### ESP32
* [#1893](https://github.com/apache/incubator-nuttx/pull/1893) Add ESP32 WiFi adapter and driver
* [#1942](https://github.com/apache/incubator-nuttx/pull/1942) Implement BASIC reset logic
* [#1945](https://github.com/apache/incubator-nuttx/pull/1945) Added Timer Support
* [#1958](https://github.com/apache/incubator-nuttx/pull/1958) When PSRAM is enabled allow drivers and tasks to allocate memory from a separate internal memory
* [#1978](https://github.com/apache/incubator-nuttx/pull/1978) Add power management of deep-sleep
* [#2074](https://github.com/apache/incubator-nuttx/pull/2074) Add real-time timer support for WiFi
* [#2138](https://github.com/apache/incubator-nuttx/pull/2138) Add Partition and OTA device
* [#2199](https://github.com/apache/incubator-nuttx/pull/2199) SPI Flash driver uses global sem for all MTD
* [#2224](https://github.com/apache/incubator-nuttx/pull/2224) Add SPI Flash hardware encryption I/O support
* [#2234](https://github.com/apache/incubator-nuttx/pull/2234) Include cache workaround to PSRAM
* [#2242](https://github.com/apache/incubator-nuttx/pull/2242) Watchdog support (MWDTs)
* [#2269](https://github.com/apache/incubator-nuttx/pull/2269) Add high memory support to work with PSRAM
* [#2294](https://github.com/apache/incubator-nuttx/pull/2294) Refactor ESP32 Wi-Fi driver
* [#2296](https://github.com/apache/incubator-nuttx/pull/2296) added support to automonitor by capture
* [#2474](https://github.com/apache/incubator-nuttx/pull/2474) Optimize IRAM usage based on esp-idf
* [#2514](https://github.com/apache/incubator-nuttx/pull/2514) allows the rtc wdt to be configured in bootloader and used later
* [#2515](https://github.com/apache/incubator-nuttx/pull/2515) Added support for RTC WDT
* [#2550](https://github.com/apache/incubator-nuttx/pull/2550) enables started flag if the wdt was turned on in bootloader
* [#2613](https://github.com/apache/incubator-nuttx/pull/2613) Added driver api to reload counter instantly
* [#2716](https://github.com/apache/incubator-nuttx/pull/2716) Add AES hardware accelerator driver
* [#2721](https://github.com/apache/incubator-nuttx/pull/2613) Add efuse driver
* [#2831](https://github.com/apache/incubator-nuttx/pull/2831) Writeback PSRAM data when mapping SPI Flash address to ESP32's address bus
* [#2840](https://github.com/apache/incubator-nuttx/pull/2840) Add esp32_gpio_matrix_in/out to replace ROM functions
* [#2858](https://github.com/apache/incubator-nuttx/pull/2858) Fix a memory leak when discarding a large packet.
* [#2939](https://github.com/apache/incubator-nuttx/pull/2939) Refactor ESP32 WiFi driver to support station and softAP coexistence
* [#2947](https://github.com/apache/incubator-nuttx/pull/2947) esp32_ummap: write back spiram cache before calling Cache_Flush
* [#2965](https://github.com/apache/incubator-nuttx/pull/2965) Add more flash options to esptool
* [#2979](https://github.com/apache/incubator-nuttx/pull/2979) Add support for I2C tracing
* [#2983](https://github.com/apache/incubator-nuttx/pull/2983) Extract memory layout definitions to a separate header
* [#2999](https://github.com/apache/incubator-nuttx/pull/2999) Add WPA2 Enterprise and WPA3 support
* [#3003](https://github.com/apache/incubator-nuttx/pull/3003) Re-organise the different heap regions
* [#3048](https://github.com/apache/incubator-nuttx/pull/3048) timer driver refactor
* [#3233](https://github.com/apache/incubator-nuttx/pull/3233) Bugfixes and Improvements for SPI DMA Exchange function

### Minor changes

* [#1904](https://github.com/apache/incubator-nuttx/pull/1904) xtensa: ESP32: Fixed the type of cpuint variables in esp32_emac.c
* [#1943](https://github.com/apache/incubator-nuttx/pull/1943) xtensa: ESP32: Fix and clean some corners of GPIOs configuration.
* [#1947](https://github.com/apache/incubator-nuttx/pull/1947) xtensa: esp32: Fix crash on startup
* [#1948](https://github.com/apache/incubator-nuttx/pull/1948) xtensa: ESP32: Fixes the GPIO's function mask test
* [#1960](https://github.com/apache/incubator-nuttx/pull/1960) xtensa: xtensa.h: Include sys/types.h needed if STACK_COLORATON is enabled
* [#1968](https://github.com/apache/incubator-nuttx/pull/1968) arm: kinetis: freedom-k64f: Declare missing NUM_BUTTONS
* [#1990](https://github.com/apache/incubator-nuttx/pull/1990) arm: kinetis: flexcan fixed compile error
* [#2120](https://github.com/apache/incubator-nuttx/pull/2120) arm: stm32h7: Fix missing 'ret' reported by Frank-Christian Kruegel
* [#2159](https://github.com/apache/incubator-nuttx/pull/2159) xtensa: esp32: Fix SPI master DMA RX buffer memcpy size erro
* [#2160](https://github.com/apache/incubator-nuttx/pull/2160) arm: stm32l4/stm32l4_adc.c: fix copy-paste mistake with CONFI
* [#2210](https://github.com/apache/incubator-nuttx/pull/2210) arm: stm32/stm32_adc.c: do not allow negative ref count
* [#2214](https://github.com/apache/incubator-nuttx/pull/2214) xtensa: esp32: Fix rt-timer issues
* [#2233](https://github.com/apache/incubator-nuttx/pull/2233) xtensa: esp32: Fix the memory regions with regards to the range used by the ROM
* [#2240](https://github.com/apache/incubator-nuttx/pull/2240) arm: nrf52 GPIO/GPIOTE: better expose pin interrupt capability
* [#2284](https://github.com/apache/incubator-nuttx/pull/2284) arm: stm32h7/stm32_dmamux.h: Fix errors in bitfield definitions
* [#2286](https://github.com/apache/incubator-nuttx/pull/2286) arm: stm32f0l0g0/stm32_dmamux.h: Fix errors in bitfield definitions
* [#2287](https://github.com/apache/incubator-nuttx/pull/2287) arm: stm32h7/stm32_dmamux.h: Add missing CCR SPOL defines
* [#2300](https://github.com/apache/incubator-nuttx/pull/2300) arm: sam34: compile error on SAM34 TWI
* [#2316](https://github.com/apache/incubator-nuttx/pull/2844) risc-v: minor fix
* [#2330](https://github.com/apache/incubator-nuttx/pull/2330) xtensa: esp32/esp32_tim.c: Fix build when debug is enabled.
* [#2336](https://github.com/apache/incubator-nuttx/pull/2336) arm: stm32l4: correct macros STM32L4_CAN_MCR_OFFSET, etc... to match defines
* [#2344](https://github.com/apache/incubator-nuttx/pull/2344) xtensa: esp32/esp32_gpio.c: Fix GPIO IRQ assert condition
* [#2351](https://github.com/apache/incubator-nuttx/pull/2351) xtensa: esp32: Fix issues of force-sleep
* [#2355](https://github.com/apache/incubator-nuttx/pull/2355) xtensa: esp32_himem: Fix issue that was preventing to map all free memory
* [#2361](https://github.com/apache/incubator-nuttx/pull/2361) arm: nrf52 GPIO: minor fixes
* [#2364](https://github.com/apache/incubator-nuttx/pull/2364) arm: stm32h7: Fix bug where more than CONFIG_MM_REGIONS would be allocated
* [#2372](https://github.com/apache/incubator-nuttx/pull/2372) rv64: Fix SCN/PRI.PTR definitions
* [#2373](https://github.com/apache/incubator-nuttx/pull/2373) risc-v: Don't use non existent "saved_status"
* [#2423](https://github.com/apache/incubator-nuttx/pull/2423) xetnsa: Couple of Xtensa fixes
* [#2448](https://github.com/apache/incubator-nuttx/pull/2448) arm: stm32/stm32h7: fix the configuration of PWM outputs when subsequent channels are not enabled
* [#2454](https://github.com/apache/incubator-nuttx/pull/2454) xtensa: esp32/esp32-core: Fix #ifdef warning and update MM_SECTIONS
* [#2483](https://github.com/apache/incubator-nuttx/pull/2483) arm: stm32: convert all STM32G47X specific code to generic STM32G4 series code
* [#2519](https://github.com/apache/incubator-nuttx/pull/2519) arm: imxrt: replace clock_systimespec with clock_systime_timespec
* [#2536](https://github.com/apache/incubator-nuttx/pull/2536) xtensa: esp32: fixes enable int function and gets apb clk frequency through function
* [#2546](https://github.com/apache/incubator-nuttx/pull/2546) arm: imxrt: imxrt_usdhc.c: fixed no DMA build error
* [#2551](https://github.com/apache/incubator-nuttx/pull/2551) arm: stm32h7x3xx_memorymap.h invalid address map for fdcan
* [#2554](https://github.com/apache/incubator-nuttx/pull/2554) xtensa: Esp32 wifi fixes
* [#2555](https://github.com/apache/incubator-nuttx/pull/2555) xtensa: esp32/esp32_spiflash.c: Writeback PSRAM data before invalidating the cache
* [#2559](https://github.com/apache/incubator-nuttx/pull/2559) risc-v: Remove duplicated declaration for up_irq_save and up_irq_restore
* [#2560](https://github.com/apache/incubator-nuttx/pull/2560) risc-v: Move csr.h to common place
* [#2568](https://github.com/apache/incubator-nuttx/pull/2568) risc-v: Move CSR register bit definition to csr.h
* [#2569](https://github.com/apache/incubator-nuttx/pull/2569) risc-v: Reuse the common up_schedule_sigaction implementation
* [#2570](https://github.com/apache/incubator-nuttx/pull/2570) arm: stm32g4: Fix incorrect FLASH wait states
* [#2573](https://github.com/apache/incubator-nuttx/pull/2573) xtensa: esp32: Bump NAME_MAX where CONFIG_ESP32_WIFI_SAVE_PARAM=y
* [#2584](https://github.com/apache/incubator-nuttx/pull/2584) xtensa: esp32_wifi_adapter.c: file mode for open doesn't make sense for O_RDONLY
* [#2589](https://github.com/apache/incubator-nuttx/pull/2589) risc-v: fix redefined CSR_INSTRET
* [#2612](https://github.com/apache/incubator-nuttx/pull/2612) arm: kinetis: S32K/Kinetis: Fix RTC settime prescaler
* [#2612](https://github.com/apache/incubator-nuttx/pull/2612) arm: S32K/Kinetis: Fix RTC settime prescaler
* [#2647](https://github.com/apache/incubator-nuttx/pull/2647) xtensa: esp32: Fix ESP32 serial UART tx ready check error
* [#2666](https://github.com/apache/incubator-nuttx/pull/2666) xtensa: esp32: Fix ESP32 SPI3 slave ops data error
* [#2676](https://github.com/apache/incubator-nuttx/pull/2676) arm: stm32412: Fixes pinmap CAN1
* [#2689](https://github.com/apache/incubator-nuttx/pull/2689) arm: tiva: Fix lm3s_ethernet.c with DEBUGASSERT
* [#2700](https://github.com/apache/incubator-nuttx/pull/2700) arm: nRF52 various minor fixes
* [#2708](https://github.com/apache/incubator-nuttx/pull/2708) xtensa: esp32: Fix ESP32 I2C driver issues
* [#2709](https://github.com/apache/incubator-nuttx/pull/2709) xtensa: esp32: Fix ESP32 SPI driver issues
* [#2722](https://github.com/apache/incubator-nuttx/pull/2722) arm: stm32f412:Replaced Kludged pinmap with one for SoC.
* [#2725](https://github.com/apache/incubator-nuttx/pull/2725) arm: nRF52: FIX wrong bitmask for DRIVE setting
* [#2727](https://github.com/apache/incubator-nuttx/pull/2727) xtensa: esp32_free_cpuint: Fix an assertion
* [#2728](https://github.com/apache/incubator-nuttx/pull/2728) xtensa: esp32_dma_init: Fix a dubious assertion
* [#2731](https://github.com/apache/incubator-nuttx/pull/2731) xtensa: esp_allocateheap.c: Correct ROM memory boundaries in SMP case
* [#2752](https://github.com/apache/incubator-nuttx/pull/2752) xtensa: esp32/esp32_spiflash.c: Fix the value of the page start address when invalidating the cache
* [#2755](https://github.com/apache/incubator-nuttx/pull/2755) xtensa: esp32: Fix compile errors with CONFIG_SMP=y
* [#2757](https://github.com/apache/incubator-nuttx/pull/2757) xtensa: esp32/esp32_wifi_adapter.c: Print debug output only when DEBUG_WIRLESS* are enabled
* [#2758](https://github.com/apache/incubator-nuttx/pull/2758) xtensa: Kconfig: Reduce the default value of the internal memory
* [#2759](https://github.com/apache/incubator-nuttx/pull/2759) xtensa: esp32/psram: Fix missing configs
* [#2761](https://github.com/apache/incubator-nuttx/pull/2761) risc-v: Remove unused and undefined file section "Public Variables"
* [#2763](https://github.com/apache/incubator-nuttx/pull/2763) arm: imx6: Apply the latest imxrt/imxrt_enet.c to imx6/imx_enet.c
* [#2771](https://github.com/apache/incubator-nuttx/pull/2771) arm: imx6: Update imx6 enet
* [#2772](https://github.com/apache/incubator-nuttx/pull/2771) arm: imx6 enet with TCP_WRITE_BUFFERS
* [#2777](https://github.com/apache/incubator-nuttx/pull/2777) arm: imx6: Fix a compile error with CONFIG_DEBUG_ASSERTIONS=y
* [#2779](https://github.com/apache/incubator-nuttx/pull/2779) arm: samv7/sam_mcan.c: fix some mismatches caused by renaming
* [#2782](https://github.com/apache/incubator-nuttx/pull/2782) arm: nRF52 fixes
* [#2788](https://github.com/apache/incubator-nuttx/pull/2788) risc-v: Don't declare riscv_addregion if CONFIG_MM_REGIONS is < 1.
* [#2791](https://github.com/apache/incubator-nuttx/pull/2791) arm: stm32f7/stm32_qspi.c: Fix warning of format strings
* [#2792](https://github.com/apache/incubator-nuttx/pull/2792) arm: [imxrt] Fix FlexCAN tx dropping frames
* [#2793](https://github.com/apache/incubator-nuttx/pull/2316) risc-v: Remove nx_start prototype from riscv_internal.h
* [#2795](https://github.com/apache/incubator-nuttx/pull/2795) arm: stm32f412:Corrected Pin count
* [#2796](https://github.com/apache/incubator-nuttx/pull/2796) xtensa: esp32: Fix cache issue detected by DEBUG_ASSERTION
* [#2799](https://github.com/apache/incubator-nuttx/pull/2799) RV64: handle relocation type R_RISCV_CALL_PLT in PIC build.
* [#2805](https://github.com/apache/incubator-nuttx/pull/2805) arm: imxrt1060 iperf
* [#2812](https://github.com/apache/incubator-nuttx/pull/2812) xtensa: esp32_spiflash.c: Fix preprocessor condition
* [#2813](https://github.com/apache/incubator-nuttx/pull/2813) xtensa: esp32: Add extern modifier to ROM function declaration
* [#2815](https://github.com/apache/incubator-nuttx/pull/2815) riscv: Fix files names in headers that were still using the old 'up_' prefix
* [#2832](https://github.com/apache/incubator-nuttx/pull/2832) xtensa: esp32: Fix the issue of WiFi internal malloc from PSRAM
* [#2844](https://github.com/apache/incubator-nuttx/pull/2844) risc-v: LiteX: Make Arty-A7 example work
* [#2867](https://github.com/apache/incubator-nuttx/pull/2867) arm: lpc17xx_40xx/lpc17_40_i2c.c: Propagate I2C I/O errors
* [#2886](https://github.com/apache/incubator-nuttx/pull/2886) arm: pic32mz: Chip does not have ANSEL register on port K
* [#2889](https://github.com/apache/incubator-nuttx/pull/2889) arm: pic32mx7 cannot perform context switch
* [#2892](https://github.com/apache/incubator-nuttx/pull/2892) risc-v: esp32-c3: Don't reserve any vectors for any special use.
* [#2893](https://github.com/apache/incubator-nuttx/pull/2893) risc-v: esp32-c3: Build serial driver only when selected
* [#2903](https://github.com/apache/incubator-nuttx/pull/2903) xtensa: esp32: xtensa_user: Implement a few more instructions
* [#2912](https://github.com/apache/incubator-nuttx/pull/2912) risc-v: esp32-c3: Fix CPU interrupts freeing on WDT driver
* [#2917](https://github.com/apache/incubator-nuttx/pull/2917) arm: Add 'select ARM_HAVE_WFE_SEV' to ARCH_CHIP_RP2040
* [#2920](https://github.com/apache/incubator-nuttx/pull/2920) risc-v: esp32-c3: Configure clock and call board initialize at startup
* [#2923](https://github.com/apache/incubator-nuttx/pull/2923) ez80: fix several bugs in emac driver
* [#2931](https://github.com/apache/incubator-nuttx/pull/2931) arm: kinetis: [FlexCAN] Fix TX drop #2792 and correctly set CAN timings to non-zero
* [#2931](https://github.com/apache/incubator-nuttx/pull/2931) arm: s32k1xx: [FlexCAN] Fix TX drop #2792 and correctly set CAN timings to non-zero
* [#2943](https://github.com/apache/incubator-nuttx/pull/2943) arm: stm32x7:lse ensure it is started
* [#2951](https://github.com/apache/incubator-nuttx/pull/2951) arm: stm32_wwdg debug log formatting
* [#2967](https://github.com/apache/incubator-nuttx/pull/2967) arm: STM32F7 lse static values directly from Kconfig
* [#2968](https://github.com/apache/incubator-nuttx/pull/2968) xtensa: esp32: Change I2C SCL default pin to a valid one
* [#2972](https://github.com/apache/incubator-nuttx/pull/2972) risc-v: esp32-c3: Fix GPIO pin function configuration
* [#2976](https://github.com/apache/incubator-nuttx/pull/2976) xtensa: ESP32: Fix I2C Kconfig bringing the character driver as a dependency
* [#2977](https://github.com/apache/incubator-nuttx/pull/2977) xtensa: ESP32: Fix GPIO pin function configuration
* [#2996](https://github.com/apache/incubator-nuttx/pull/2996) arm: stm32h747xi: Fix missing IO_CONFIG setting
* [#3008](https://github.com/apache/incubator-nuttx/pull/3008) risc-v: esp32-c3: free cpu in case it was preallocated in wdt driver
* [#3013](https://github.com/apache/incubator-nuttx/pull/3013) risc-v: bl602:fix bl602_flash_erase to erase the wrong block
* [#3034](https://github.com/apache/incubator-nuttx/pull/3034) arm: imx6: Fix an error message in imx_enet.c
* [#3051](https://github.com/apache/incubator-nuttx/pull/3051) risc-v: Internal functions should be prefixed with riscv_ not up
* [#3075](https://github.com/apache/incubator-nuttx/pull/3075) arm: Fix syscall number out of swi range in thumb mode
* [#3079](https://github.com/apache/incubator-nuttx/pull/3079) arm: kinetis: [FlexCAN] Correct reset state for CTRL1 register
* [#3079](https://github.com/apache/incubator-nuttx/pull/3079) arm: s32k1xx: [FlexCAN] Correct reset state for CTRL1 register
* [#3088](https://github.com/apache/incubator-nuttx/pull/3088) arm: samv7: Fix sam_putreg() parameter type
* [#3092](https://github.com/apache/incubator-nuttx/pull/3092) xtensa: xtensa: esp32_allocateheap.c: Don't allocate ROM regions when running in QEMU.
* [#3116](https://github.com/apache/incubator-nuttx/pull/3116) arm: stm32l5: Enable SPI support and license clearing
* [#3119](https://github.com/apache/incubator-nuttx/pull/2976) xtensa: sp32: Fix buffer size word-alignment for DMA transfers
* [#3125](https://github.com/apache/incubator-nuttx/pull/3125) risc-v: Internal functions should be prefixed with "riscv_"
* [#3130](https://github.com/apache/incubator-nuttx/pull/3145) xtensa: esp32: Fix SPI polling mode when DMA is also enabled.
* [#3135](https://github.com/apache/incubator-nuttx/pull/3135) rv64:c906:colorize the idle stack area;minor fixes.
* [#3145](https://github.com/apache/incubator-nuttx/pull/3145) xtensa: esp32_part_ioctl: Return -ENOTTY for unknown commands
* [#3162](https://github.com/apache/incubator-nuttx/pull/3162) arm: STM32 USB OTGFSDEV: Fix handling of SETUP OUT longer than 64 bytes
* [#3167](https://github.com/apache/incubator-nuttx/pull/3167) arm: stm32h7:SPI Fix 16 bit SPI mode
* [#3174](https://github.com/apache/incubator-nuttx/pull/3174) arm: Use macro defined swi range in dispatch_syscall
* [#3178](https://github.com/apache/incubator-nuttx/pull/3178) arm: tiva:cc13x0_adi3_refsys fix typo
* [#3198](https://github.com/apache/incubator-nuttx/pull/3198) arm: Stm32h7 fix heap clobber
* [#3199](https://github.com/apache/incubator-nuttx/pull/3199) xtensa: ESP32: Fix math for DMA buffer length rounding
* [#3200](https://github.com/apache/incubator-nuttx/pull/3200) xtensa: esp32: Fix DMA burst mode being unintendedly disabled
* [#3219](https://github.com/apache/incubator-nuttx/pull/3219) risc-v: bl602: fix _heap_start not word aligned
* [#3220](https://github.com/apache/incubator-nuttx/pull/3220) arm: Fix indexing for stm32h7 usbhost tracing
* [#3248](https://github.com/apache/incubator-nuttx/pull/3248) xtensa: esp32: remove extra initial newline on syslog call
* [#3283](https://github.com/apache/incubator-nuttx/pull/3283) rv64:add memory clobber to inline asm for syscall.
* [#3285](https://github.com/apache/incubator-nuttx/pull/3285) arm: Remove .cpu directive from assemble file
* [#3293](https://github.com/apache/incubator-nuttx/pull/3293) arm: armv6-m: Remove cpsid and cpsie from exception_common
* [#3307](https://github.com/apache/incubator-nuttx/pull/3307) arm: Replace the hardcode syscall number with macro
* [#3310](https://github.com/apache/incubator-nuttx/pull/3310) arm: armv8-m: Merge ite instruction to the previous one
* [#3311](https://github.com/apache/incubator-nuttx/pull/3311) arm: fix the potential corruption in initialization
* [#3313](https://github.com/apache/incubator-nuttx/pull/3313) arm: Replace "b lr" or "mov pc, lr" with "bx lr"
* [#3315](https://github.com/apache/incubator-nuttx/pull/3315) arm: Move setjmp/longjmp to libc/machine
* [#3326](https://github.com/apache/incubator-nuttx/pull/3326) arm: Update the old arm architecture with the recent fix
* [#3440](https://github.com/apache/incubator-nuttx/pull/3440) arm: Change all spsr_cxsf to spsr
* [#3448](https://github.com/apache/incubator-nuttx/pull/3448) arm: armv7-a: Remove the special process of the nest level
* [#3451](https://github.com/apache/incubator-nuttx/pull/3451) arm: Remove g_irqtmp, g_undeftmp and g_aborttmp
* [#3452](https://github.com/apache/incubator-nuttx/pull/3452) risc-v: esp32-c3: Refactors and fixes issues on serial driver.
* [#3457](https://github.com/apache/incubator-nuttx/pull/3457) arm: stm32h7: Actually use the AXI SRAM as the main heap as the documentation describes in PROTECTED mode.
* [#3459](https://github.com/apache/incubator-nuttx/pull/3459) arm: stm32h7: Fixes build error in stm32_sdmmc.c without DCACHE
* [#3473](https://github.com/apache/incubator-nuttx/pull/3473) xtensa: esp32: move common XTAL and RUN_IRAM configs to ESP32 KConfig
* [#3486](https://github.com/apache/incubator-nuttx/pull/3486) xtensa: esp32: Improve SPI polling to use the entire HW buffer
* [#3492](https://github.com/apache/incubator-nuttx/pull/3492) risc-v: riscv_initialize.c: Add telnet_initialize to riscv's up_initialize
* [#2868](https://github.com/apache/incubator-nuttx/pull/2868) xtensa: Fix xtensa stack coloring

## Simulator
### New Features
* [#2129](https://github.com/apache/incubator-nuttx/pull/2129) add "nimble" config, to test nimBLE on top of bthcisock  
* [#2130](https://github.com/apache/incubator-nuttx/pull/2130) rpproxy/rpserver: force use 'CONFIG_SIM_M32' for 64bit system.  
* [#2158](https://github.com/apache/incubator-nuttx/pull/2158) linux I2C bus support in sim  
* [#2164](https://github.com/apache/incubator-nuttx/pull/2164) add LVGL configuration which uses the X11 framebuffer and mouse  
* [#2198](https://github.com/apache/incubator-nuttx/pull/2198) support LCD emulation over X11; correctly decouple LCD/FB from X11/NX  
* [#2579](https://github.com/apache/incubator-nuttx/pull/2579) make it conditional with FS_FAT  
* [#2599](https://github.com/apache/incubator-nuttx/pull/2599) names: add writev/readv into name list  
* [#2619](https://github.com/apache/incubator-nuttx/pull/2619) hci: reuse the reserved fields of hci buffer  
* [#2690](https://github.com/apache/incubator-nuttx/pull/2690) support sim vfork
* [#2696](https://github.com/apache/incubator-nuttx/pull/2696) hcitty: add hcitty adapter  
* [#2720](https://github.com/apache/incubator-nuttx/pull/2720) board/sim: Support NuttX BLE stack through uart shim driver
* [#3093](https://github.com/apache/incubator-nuttx/pull/3093) add heap policy and asan logic to support mm debug on sim platform  
* [#3152](https://github.com/apache/incubator-nuttx/pull/3152) add dlsym to [nuttx-names.in](http://nuttx-names.in)  
* [#3224](https://github.com/apache/incubator-nuttx/pull/3224) boards/sim: remove dsptest configuration
* [#3231](https://github.com/apache/incubator-nuttx/pull/3231) add the simulated lower-half FOC device
* [#3478](https://github.com/apache/incubator-nuttx/pull/3478) refactor signal handling  

### Bug Fixes
* [#2109](https://github.com/apache/incubator-nuttx/pull/2109) Revert "arch/sim: Make the SIGUSR1 host signal use the NuttX irq logic"
* [#2246](https://github.com/apache/incubator-nuttx/pull/2246) boards/sim/sim/sim/src/sim_touchscreen.c: add missing nx_disconnect
* [#2259](https://github.com/apache/incubator-nuttx/pull/2259) boards/sim: add atexit(2) into naming list
* [#2441](https://github.com/apache/incubator-nuttx/pull/2441) sim: fix input handling and add simulated buttons support from mouse
* [#2597](https://github.com/apache/incubator-nuttx/pull/2597) Revert "board/sim: Remove the too strict warning"
* [#3176](https://github.com/apache/incubator-nuttx/pull/3176) sim: fix signal deliver calling error on sim platform
* [#3205](https://github.com/apache/incubator-nuttx/pull/3205) sim: do not exit simulator on up_assert (just let the task exit)

## Documentation
### New Features

* [#1955](https://github.com/apache/incubator-nuttx/pull/1955) Add documentation for note filters and task trace guides
* [#1959](https://github.com/apache/incubator-nuttx/pull/1959) Documentation for the Timer Driver
* [#2268](https://github.com/apache/incubator-nuttx/pull/2268) Documentation for Watchdog Timer Driver
* [#2334](https://github.com/apache/incubator-nuttx/pull/2334) [CONTRIBUTING.md](http://CONTRIBUTING.md): talk about preferred commit message format
* [#2408](https://github.com/apache/incubator-nuttx/pull/2408) Documentation: support versioned docs
* [#2543](https://github.com/apache/incubator-nuttx/pull/2543) Documentation: how to use auto monitor feature to keep the chip alive
* [#2818](https://github.com/apache/incubator-nuttx/pull/2818) Documentation: introduce hardware platforms documentation
* [#2819](https://github.com/apache/incubator-nuttx/pull/2819) Documentation: document nRF52832 Sparkfun board (improve MDK board a bit)
* [#3022](https://github.com/apache/incubator-nuttx/pull/3022) hostfs: Document the backends and restrictions
* [#3127](https://github.com/apache/incubator-nuttx/pull/3127) Documentation: add ESP32 and DevKitC docs
* [#3138](https://github.com/apache/incubator-nuttx/pull/3138) Addind CMake based C++ project example in documentation
* [#3490](https://github.com/apache/incubator-nuttx/pull/3490) Documentation/esp32: Add supported peripherals

### Improvements

* [#2021](https://github.com/apache/incubator-nuttx/pull/2021) Correct the links in Documentation folder
* [#2024](https://github.com/apache/incubator-nuttx/pull/2024) Fix broken documentation links
* [#2026](https://github.com/apache/incubator-nuttx/pull/2026) Documentation: Remove all tail spaces from *.rst and *.html
* [#2027](https://github.com/apache/incubator-nuttx/pull/2027) Documentation: Reorganize some section
* [#2031](https://github.com/apache/incubator-nuttx/pull/2031) Documentation/quickstart/debugging.rst: rewrite JTAG/OpenOCD section
* [#2045](https://github.com/apache/incubator-nuttx/pull/2045) Documentation: Misc fixups for broken links, errors, warnings
* [#2051](https://github.com/apache/incubator-nuttx/pull/2051) Documentation/quickstart/debugging: rewrite SWD sentence
* [#2106](https://github.com/apache/incubator-nuttx/pull/2106) documentation: change non-working URL
* [#2329](https://github.com/apache/incubator-nuttx/pull/2329) Documentation/components/drivers/character/pwm: fix pwm.c location
* [#2362](https://github.com/apache/incubator-nuttx/pull/2362) Documentation improvements
* [#2390](https://github.com/apache/incubator-nuttx/pull/2390) Documentation: improve debugging section
* [#2485](https://github.com/apache/incubator-nuttx/pull/2485) Documentaiton: merge quickstart to getting started
* [#2563](https://github.com/apache/incubator-nuttx/pull/2563) update Documentation/components/drivers/character/watchdog.rst
* [#3144](https://github.com/apache/incubator-nuttx/pull/3144) CI: remove linkcheck when building docs
* [#3180](https://github.com/apache/incubator-nuttx/pull/3180) documentation: improve boardctl() docs
* [#3194](https://github.com/apache/incubator-nuttx/pull/3194) Documentation: add syslog user API and other minor improvements
* [#3271](https://github.com/apache/incubator-nuttx/pull/3271) docs and comments: Update stale references to COPYING
* [#3470](https://github.com/apache/incubator-nuttx/pull/3470) Documentation: migrate ESP32 README to docs

## Driver Support
### Bug Fixes

* [#2036](https://github.com/apache/incubator-nuttx/pull/2036) serial: break from read after closing
* [#2039](https://github.com/apache/incubator-nuttx/pull/2039) sensors: add unified management for sensor
* [#2070](https://github.com/apache/incubator-nuttx/pull/2070) bluetooth: support HCI/L2CAP sockets, support HCI RAW channel
* [#2139](https://github.com/apache/incubator-nuttx/pull/2139) lcd: Ssd1306 cleanup
* [#2142](https://github.com/apache/incubator-nuttx/pull/2776) note: Add task name record for task trace
* [#2146](https://github.com/apache/incubator-nuttx/pull/2146) pipes: nx_pipe syscall takes three params, also use nx_close
* [#2175](https://github.com/apache/incubator-nuttx/pull/2175) wireless: gs2200m: Check disassociation from AP and enable rejoin
* [#2188](https://github.com/apache/incubator-nuttx/pull/2200) lcd_dev: put header in correct location; fix missing const
* [#2200](https://github.com/apache/incubator-nuttx/pull/2200) lcd: Minor fixes to ssd1306 i2c driver
* [#2201](https://github.com/apache/incubator-nuttx/pull/2512) wireless: gs2200m: Add function to get IWNWID / IWFREQ / IWSENS information
* [#2208](https://github.com/apache/incubator-nuttx/pull/2208) lcd: add optional putarea()/getarea() operations
* [#2215](https://github.com/apache/incubator-nuttx/pull/2215) sensors: add new feature about sensor driver model
* [#2223](https://github.com/apache/incubator-nuttx/pull/2223) audio: cxd56: cleanup for the spresense audio implementation
* [#2315](https://github.com/apache/incubator-nuttx/pull/2370) sensors: add common circular buffer management
* [#2318](https://github.com/apache/incubator-nuttx/pull/2318) sensors: update l3gd20 sensor driver with new sensor driver model
* [#2343](https://github.com/apache/incubator-nuttx/pull/2343) serial: Prevent RX stall
* [#2345](https://github.com/apache/incubator-nuttx/pull/2345) mtd/mtd_progmem.c: fix progmem_log2 parameter type to match prototype
* [#2369](https://github.com/apache/incubator-nuttx/pull/2369) sensors: support custom types of sensor
* [#2370](https://github.com/apache/incubator-nuttx/pull/2370) rc: fix bug about lirc_read
* [#2383](https://github.com/apache/incubator-nuttx/pull/2383) USB: Do not try to print NULL format strings for verbose trace messages when disabled
* [#2398](https://github.com/apache/incubator-nuttx/pull/2398) rptun: fix rptun rpmsg_unregister_callback fault
* [#2445](https://github.com/apache/incubator-nuttx/pull/2445) audio: Make audio_null play at real speed
* [#2488](https://github.com/apache/incubator-nuttx/pull/2488) crypto/arc4random: rename getrandom to arc4random_buf
* [#2490](https://github.com/apache/incubator-nuttx/pull/3482) leds: ws2812: make frequency selection more flexible
* [#2497](https://github.com/apache/incubator-nuttx/pull/2497) crypto/random_pool.c: fix getrandom() when thread calling it gets can…
* [#2508](https://github.com/apache/incubator-nuttx/pull/2508) leds/ws2812: optimize reset bytes
* [#2512](https://github.com/apache/incubator-nuttx/pull/2488) wireless/bluetooth: change the tx thread stack size to DEFAULT_TASK_STACKSIZE
* [#2564](https://github.com/apache/incubator-nuttx/pull/2564) audio: uninitialize usermq to NULL when the device has not
* [#2571](https://github.com/apache/incubator-nuttx/pull/2571) bluetooth: Fix bt_buff lifecycle
* [#2607](https://github.com/apache/incubator-nuttx/pull/2607) wireless: bluetooth: minor fix to bluetooth stack
* [#2609](https://github.com/apache/incubator-nuttx/pull/2609) wireless: bluetooth: fix minor issue in bt uart driver
* [#2611](https://github.com/apache/incubator-nuttx/pull/2611) wireless/bluetooth: Fix vairous issues found in bt uart shim driver
* [#2617](https://github.com/apache/incubator-nuttx/pull/2617) serial: should include <signal.h> explicitly
* [#2621](https://github.com/apache/incubator-nuttx/pull/2621) syslog: Added formatted timestamps in syslog.
* [#2636](https://github.com/apache/incubator-nuttx/pull/2636) pipes: pty shouldn't call nx_pipe and then file_detach in kernel space
* [#2664](https://github.com/apache/incubator-nuttx/pull/2664) can: fix RTR ioctl and support timeout
* [#2691](https://github.com/apache/incubator-nuttx/pull/2383) wireless: bluetooth: add more hci event definitions
* [#2692](https://github.com/apache/incubator-nuttx/pull/2692) syslog: Prepend Process ID to syslog message
* [#2697](https://github.com/apache/incubator-nuttx/pull/2697) syslog: Added printing of log priority in syslog
* [#2698](https://github.com/apache/incubator-nuttx/pull/2698) syslog: Added color output to syslog.
* [#2704](https://github.com/apache/incubator-nuttx/pull/2704) wireless: bluetooth: minor fix for bluetooth driver
* [#2707](https://github.com/apache/incubator-nuttx/pull/2707) drivers: wireless: Fix ASSERT() in _read_data_len() in gs2200m.c
* [#2710](https://github.com/apache/incubator-nuttx/pull/2710) syslog: Re-arranged syslog fields.
* [#2711](https://github.com/apache/incubator-nuttx/pull/2711) sensors: bmp280: minor fixes
* [#2715](https://github.com/apache/incubator-nuttx/pull/2715) sensors: bmp280: convert to sensor interface (and minor sensor change)
* [#2738](https://github.com/apache/incubator-nuttx/pull/2738) wireless: gs2200m: Print error massages with wlerr()
* [#2747](https://github.com/apache/incubator-nuttx/pull/2747) wireless: gs2200m: Fix _read_data()
* [#2775](https://github.com/apache/incubator-nuttx/pull/2775) mtd: w25qxxxjv.c : W25Q256's sector count is 8192
* [#2776](https://github.com/apache/incubator-nuttx/pull/2776) net/encx24j600.c: Correct setting of ifstate
* [#2798](https://github.com/apache/incubator-nuttx/pull/2798) wireless: gs2200m: Change retry condition in gs2200m_hal_write()
* [#2801](https://github.com/apache/incubator-nuttx/pull/2801) mtd:w25qxxxjv.c: use different protect bits and address lengts
* [#2850](https://github.com/apache/incubator-nuttx/pull/2850) audio: Introduce a driver-specific spinlock to cxd56.c
* [#2907](https://github.com/apache/incubator-nuttx/pull/2711) sensors: driver model update
* [#2950](https://github.com/apache/incubator-nuttx/pull/2950) audio: pcm_decode: add RAW format support
* [#2961](https://github.com/apache/incubator-nuttx/pull/2961) syslog_rpmsg: fix system crash when open CONFIG_SCHED_HAVE_PARENT
* [#2989](https://github.com/apache/incubator-nuttx/pull/2989) mmcsd: Fixes race condition in event wait logic of SDMMC driver
* [#3000](https://github.com/apache/incubator-nuttx/pull/3000) sensors: fakesensor support batch
* [#3020](https://github.com/apache/incubator-nuttx/pull/3020) syslog: add option to prefix process name
* [#3047](https://github.com/apache/incubator-nuttx/pull/3047) mmcsd: Stuck in 1-bit mode, Removed CONFIG_ARCH_HAVE_SDIO_DELAYED_INVLDT
* [#3050](https://github.com/apache/incubator-nuttx/pull/3050) syslog: Added support for multiple syslog channels.
* [#3110](https://github.com/apache/incubator-nuttx/pull/3110) can: Add CAN FD flags to CAN header
* [#3118](https://github.com/apache/incubator-nuttx/pull/3118) sensors: qencoder.c - Remove bad sninfo() format string
* [#3163](https://github.com/apache/incubator-nuttx/pull/3163) USBDEV: RNDIS: Fix occasional disconnections due to race condition
* [#3185](https://github.com/apache/incubator-nuttx/pull/3185) USBDEV RNDIS: Fix unaligned access caused by 4f66624
* [#3195](https://github.com/apache/incubator-nuttx/pull/3195) serial: Don't comment out ws_[x|y]pixel field from winsize struct
* [#3201](https://github.com/apache/incubator-nuttx/pull/3201) timers: rtc/rpmsg: support server and client to set time each other
* [#3214](https://github.com/apache/incubator-nuttx/pull/3214) can: Fix TX ID bits 18-20 of mcp2515 can driver
* [#3215](https://github.com/apache/incubator-nuttx/pull/3215) syslog: Drop extra carriage return from syslog calls
* [#3226](https://github.com/apache/incubator-nuttx/pull/3226) syslog: Added multi device support in syslog_device.
* [#3269](https://github.com/apache/incubator-nuttx/pull/3269) motor: Add support for motor debug messages
* [#3453](https://github.com/apache/incubator-nuttx/pull/3453) syslog: Fix in syslog_intbuffer flushing
* [#3454](https://github.com/apache/incubator-nuttx/pull/3454) syslog: Proper uninit of syslog_device.
* [#3475](https://github.com/apache/incubator-nuttx/pull/3214) input: Add INPUT_TOUCHSCREEN config
* [#3482](https://github.com/apache/incubator-nuttx/pull/3482) input: Rename config from INPUT classes

### New Driver Support

* [#1936](https://github.com/apache/incubator-nuttx/pull/1936) note: Add task trace support
* [#1989](https://github.com/apache/incubator-nuttx/pull/1989) sensors: Support fxos8700cq motion I2C sensor
* [#2091](https://github.com/apache/incubator-nuttx/pull/2091) usbdev: add Android Debug Bridge driver
* [#2166](https://github.com/apache/incubator-nuttx/pull/2166) lcd: Add LCD character driver: allows interacting with LCD directly from userspace
* [#2216](https://github.com/apache/incubator-nuttx/pull/2216) rc: support infrared remote control
* [#2282](https://github.com/apache/incubator-nuttx/pull/2282) audio: cxd56: add initial audio SRC implementation
* [#2301](https://github.com/apache/incubator-nuttx/pull/2301) analog: support for MAX1161X family of I2C 12 bit ADC chips
* [#2429](https://github.com/apache/incubator-nuttx/pull/2429) audio: add simple wm8994 codec driver
* [#2628](https://github.com/apache/incubator-nuttx/pull/2628) efuse: Add generic efuse driver for NuttX
* [#2736](https://github.com/apache/incubator-nuttx/pull/2736) console: Add generic support to LWL Console
* [#2829](https://github.com/apache/incubator-nuttx/pull/2829) sensor: add fakesensor driver
* [#3230](https://github.com/apache/incubator-nuttx/pull/3230) motor: add generic upper-half driver for Field Oriented Control (FOC)
* [#3474](https://github.com/apache/incubator-nuttx/pull/3474) sensors: Adds driver for hyt271 sensore module

## Board Support
### New Board Support
* [#2054](https://github.com/apache/incubator-nuttx/pull/2054) configure.sh: update custom board config build support
* [#2463](https://github.com/apache/incubator-nuttx/pull/2463) boards: Added Teensy-4.x BSP
* [#2503](https://github.com/apache/incubator-nuttx/pull/2503) Re-organise ESP32 boards and introduce two more(ESP-WROVER-KIT and the ESP32-Ethernet-Kit)
* [#2506](https://github.com/apache/incubator-nuttx/pull/2506) stm32: add stm32g43x support and nucleo-g431rb board
* [#2838](https://github.com/apache/incubator-nuttx/pull/2838) Add initial support for ESP32-C3 and ESP32-C3 DevKit board
* [#2877](https://github.com/apache/incubator-nuttx/pull/2877) Support for Raspberry Pi Pico
* [#3129](https://github.com/apache/incubator-nuttx/pull/3129) boards/stm32: add initial support for b-g431b-esc1 board
* [#3217](https://github.com/apache/incubator-nuttx/pull/3217) board: Add support for nucleo-h743i2
* [#3234](https://github.com/apache/incubator-nuttx/pull/3234) boards/stm32/common: add support for IHM07M1 and IHM08M1 boards

### Boards With Significant Improvements

#### ARM
#### CXD56

* [#1939](https://github.com/apache/incubator-nuttx/pull/1939) Add cxd56xx intstack for SMP
* [#3016](https://github.com/apache/incubator-nuttx/pull/3016) spresense:rndis_smp
* [#3024](https://github.com/apache/incubator-nuttx/pull/3024) Spesense CPU activity LED support
* [#3084](https://github.com/apache/incubator-nuttx/pull/3084) cxd56_gnss: Add missing include header for cxd56_gnss.c
* [#3085](https://github.com/apache/incubator-nuttx/pull/3085) cxd56_cpu1signal: Fix an issue that gnss does not work

#### IMX6
* [#2997](https://github.com/apache/incubator-nuttx/pull/2997) boards: sabre-6quad: Add netnsh_smp configuration

#### IMXRT  
* [#2004](https://github.com/apache/incubator-nuttx/pull/2004) FlexCAN driver for i.MX RT1060 MCU
* [#2526](https://github.com/apache/incubator-nuttx/pull/2526) boards/arm/imxrt/teensy-4.x: CDC-ACM console support
* [#2588](https://github.com/apache/incubator-nuttx/pull/2588) teensy-4.x Support for ST7789 controller

#### LPC17XX_40XX
* [#3239](https://github.com/apache/incubator-nuttx/pull/3239) board/arm/lpc17xx_40xx/mbed: Add userleds driver support

#### NRF52
* [#2706](https://github.com/apache/incubator-nuttx/pull/2706) board/nrf52-feather: Add simple i2c test configuration

#### RP2040
* [#2884](https://github.com/apache/incubator-nuttx/pull/2884) Update raspi-pico
* [#2894](https://github.com/apache/incubator-nuttx/pull/2894) boards: raspberrypi-pico: Add nshsram defconfig for SRAM build
* [#3014](https://github.com/apache/incubator-nuttx/pull/3014) BMP180 sensor support to RP2040
* [#3021](https://github.com/apache/incubator-nuttx/pull/3021) add INA219 support
* [#3030](https://github.com/apache/incubator-nuttx/pull/3030) boards/raspberrypi-pico: Support ENC28J60 SPI ethernet board
* [#3067](https://github.com/apache/incubator-nuttx/pull/3067) boards/raspberrypi-pico: Pico Display Pack (ST7789 LCD) support

#### SAM34
* [#2464](https://github.com/apache/incubator-nuttx/pull/2464) Added: MT29F2G Nand Flash block driver for sam4s-xplained-pro

#### STM32  
* [#2433](https://github.com/apache/incubator-nuttx/pull/2433) Add 2.4 Inch TFT LCD Shield ILI9341 for nucleo-l152re, 8080 MCU 8-bit
* [#2505](https://github.com/apache/incubator-nuttx/pull/2505) boards/arm/stm32/stm32f103-minimum: cleanup
* [#3053](https://github.com/apache/incubator-nuttx/pull/3053) Nucleo-F446RE: added support for CAN driver
* [#3064](https://github.com/apache/incubator-nuttx/pull/3064) boards: refactor for nucleo-f446re and nucleo-f302r8 boards
* [#3097](https://github.com/apache/incubator-nuttx/pull/3097) Add configuration for testing the Sporadic Scheduler.
* [#3222](https://github.com/apache/incubator-nuttx/pull/3222) stm32/stm32_serial: add support for TX DMA and some improvements
* [#3223](https://github.com/apache/incubator-nuttx/pull/3223) stm32/stm32_pwm: add interfaces to access RCR register and TRGO
* [#3225](https://github.com/apache/incubator-nuttx/pull/3225) stm32/stm32_adc: various improvements for ADC
* [#3232](https://github.com/apache/incubator-nuttx/pull/3232) stm32/stm32_foc.c: add the lower-half FOC device support

#### STM32L4
* [#2009](https://github.com/apache/incubator-nuttx/pull/2842) Added STM32L432KC DAC support
* [#2837](https://github.com/apache/incubator-nuttx/pull/2837) Add missing I2C3 support on nucleo-l432kc board
* [#2842](https://github.com/apache/incubator-nuttx/pull/2842) board: nucleo-l432kc: Add missing i2c_master_s definition

#### STM32F4
* [#2553](https://github.com/apache/incubator-nuttx/pull/2553) boards: stm32f4discovery: Add adb configuration
* [#2699](https://github.com/apache/incubator-nuttx/pull/2699) boards/stm32f4discovery: Add a LWL board profile and improve the README.txt
* [#3052](https://github.com/apache/incubator-nuttx/pull/3052) Add support to LCD ST7789 on STM32F4Discovery
* [#3056](https://github.com/apache/incubator-nuttx/pull/3056) Add LCD1602 Backpack to common board

#### STM32F7
* [#3218](https://github.com/apache/incubator-nuttx/pull/3218) Integration of pysimCoder with NUTTX

#### STM32H7
* [#2353](https://github.com/apache/incubator-nuttx/pull/2353) Fix of the OTG FS HOST for nucleo-h743zi

#### KINETIS

* [#1969](https://github.com/apache/incubator-nuttx/pull/1969) freedom-k64f: Init PWM only if enabled
* [#1977](https://github.com/apache/incubator-nuttx/pull/1977) freedom-k64f: Support raw binary firmware format
* [#1980](https://github.com/apache/incubator-nuttx/pull/1980) freedom-k64f: Add renew DHCP client for netnsh
* [#1982](https://github.com/apache/incubator-nuttx/pull/1982) freedom-k64f: Add I2C initial support
* [#1999](https://github.com/apache/incubator-nuttx/pull/1999) freedom-k64f: Register on board sensor driver
* [#2020](https://github.com/apache/incubator-nuttx/pull/2020) freedom-k64f: Declare k64_i2cdev_initialize function
* [#2030](https://github.com/apache/incubator-nuttx/pull/2030) freedom-k64f: Fix k64_buttons.c  
* [#2037](https://github.com/apache/incubator-nuttx/pull/2037) freedom-k64f: Add demo configuration
* [#2047](https://github.com/apache/incubator-nuttx/pull/2047) freedom-k64f: Add I2C to demo image
* [#2847](https://github.com/apache/incubator-nuttx/pull/2847) board/freedom-k64f: Add usbdev support with cdcacm example

#### RISC-V
#### BL602
* [#2764](https://github.com/apache/incubator-nuttx/pull/2764) boards: bl602evb flash and debug notes

#### C906
* [#3027](https://github.com/apache/incubator-nuttx/pull/3027) board:rv64:c906:support the ELF apps

#### ESP32C3
* [#2879](https://github.com/apache/incubator-nuttx/pull/2879) risc-v/esp32c3: Enable stdio buffering for esp32c3-devkit NSH config
* [#2897](https://github.com/apache/incubator-nuttx/pull/2897) boards/esp32c3: Add tmpfs mounting when bringing up
* [#3074](https://github.com/apache/incubator-nuttx/pull/3074) esp32c3-devkit: Use nx_mount to avoid overriding errno
* [#3261](https://github.com/apache/incubator-nuttx/pull/3261) esp32-c3: Add support to RNG peripheral

#### XTENSA
#### ESP32

* [#2507](https://github.com/apache/incubator-nuttx/pull/2507) boards/arm/stm32: add common and stm32f103-minimum support for WS2812
* [#2753](https://github.com/apache/incubator-nuttx/pull/2753) esp32: Enable renew for "wapi" configs
* [#2864](https://github.com/apache/incubator-nuttx/pull/2864) Add wapi_smp to test Wi-Fi in SMP mode
* [#2883](https://github.com/apache/incubator-nuttx/pull/2883) This commit implements I2C support for ESP32 (wrover kit)
* [#2888](https://github.com/apache/incubator-nuttx/pull/2888) This commit enables BMP180 suport for ESP32
* [#2971](https://github.com/apache/incubator-nuttx/pull/2971) esp32: Add board config to support MCP2515
* [#3071](https://github.com/apache/incubator-nuttx/pull/3071) ESP32: Mount TMPFS on board bring up
* [#3095](https://github.com/apache/incubator-nuttx/pull/3095) ESP32: Allow a BSS section to reside in external memory
* [#3117](https://github.com/apache/incubator-nuttx/pull/3117) xtensa/esp32: Use Polling instead of DMA for transfers below threshold
* [#3139](https://github.com/apache/incubator-nuttx/pull/3139) xtensa/esp32: Support esp32 wireless ioctl cmd
* [#3154](https://github.com/apache/incubator-nuttx/pull/3154) ESP32: Add Button support via BOOT button on GPIO0
* [#3164](https://github.com/apache/incubator-nuttx/pull/3164) xtensa/esp32: Adds oneshot timer driver.
* [#3190](https://github.com/apache/incubator-nuttx/pull/3190) risc-v/esp32c3: Support ESP32-C3 wireless ioctl cmd
* [#3192](https://github.com/apache/incubator-nuttx/pull/3192) esp32-devkitc: Make nsh the entry-point of the ostest config
* [#3211](https://github.com/apache/incubator-nuttx/pull/3211) esp32-devkitc: Add GPIO board support
* [#3270](https://github.com/apache/incubator-nuttx/pull/3270) xtensa/esp32: Refactor register access functions on SPI driver
* [#3303](https://github.com/apache/incubator-nuttx/pull/3303) esp32-devkitc: Add BMP180 sensor support

#### TIVA
* [#2684](https://github.com/apache/incubator-nuttx/pull/2684) boards: lm3s6965-ek: Add iperf to discover/defconfig

### **Minor Board Changes**
* [#2558](https://github.com/apache/incubator-nuttx/pull/2558) boards: Remove CINCPATH and CXXINCPATH

#### ARM  
* [#2079](https://github.com/apache/incubator-nuttx/pull/2079) Stm32 oled fixes pr
* [#2360](https://github.com/apache/incubator-nuttx/pull/2360) stm32/stm32ldiscovery: modernize board init little bit
* [#2500](https://github.com/apache/incubator-nuttx/pull/2500) stm32/common: devpath not long enough for apa102 and veml6070

#### CXD56  

* [#2193](https://github.com/apache/incubator-nuttx/pull/2193) cxd56xx: Remove HOSTCC and HOSTCFLAGS from Make.defs

#### Xtensa

* [#2127](https://github.com/apache/incubator-nuttx/pull/2127) esp32: Added Userled support
* [#2802](https://github.com/apache/incubator-nuttx/pull/2802) ESP32: Refactor of POSTBUILD action
* [#3263](https://github.com/apache/incubator-nuttx/pull/3263) esp32: Move the WLAN initialisation to the common directory.
* [#3288](https://github.com/apache/incubator-nuttx/pull/3288) esp32-wrover-kit: Don't use User GPIO Subsystem to control LED
* [#3442](https://github.com/apache/incubator-nuttx/pull/3442) esp32 boards: BUTTON_BOOT should use PULLUP instead PULLDOWN

## File System

### Bug Fixes

* [#2073](https://github.com/apache/incubator-nuttx/pull/2073) fs: epoll_create: modify return value for epoll_create1
* [#2260](https://github.com/apache/incubator-nuttx/pull/2260) fs: eventfd: remove the unique minor limit
* [#2317](https://github.com/apache/incubator-nuttx/pull/2317) fs: flashback to release all file descriptors in group to increase debugging time.
* [#2339](https://github.com/apache/incubator-nuttx/pull/2339) Revert "fs/nxffs: Fix scan good block slowly and scan an invalid block"
* [#2532](https://github.com/apache/incubator-nuttx/pull/2532) fs/unionfs: remove excessive protection to avoid deadlock
* [#2540](https://github.com/apache/incubator-nuttx/pull/2540) fs: Skip call fs_checkfd if fd < 3 in fs_fdopen
* [#2572](https://github.com/apache/incubator-nuttx/pull/2572) fs: spiffs fixes
* [#2606](https://github.com/apache/incubator-nuttx/pull/2606) fs: Fix inode lock at umount2
* [#2618](https://github.com/apache/incubator-nuttx/pull/2618) fs: remove INODE_IS_SPECIAL() use INODE_IS_PSEUDODIR instead
* [#2638](https://github.com/apache/incubator-nuttx/pull/2618) fs: fs_dupfd2 should return OK if fd1 equals fd2
* [#2639](https://github.com/apache/incubator-nuttx/pull/2639) fs: Let files_allocate return -EMFILE instead ERROR
* [#2640](https://github.com/apache/incubator-nuttx/pull/2640) fs: Remove _files_close and reuse file_close
* [#2643](https://github.com/apache/incubator-nuttx/pull/2643) fs: Fix the race condition in file_dup
* [#2648](https://github.com/apache/incubator-nuttx/pull/2648) fs: Remove the special hack for pty in nx_vopen
* [#2660](https://github.com/apache/incubator-nuttx/pull/2660) fs: Reimplement file_open to not depend on nx_open
* [#2661](https://github.com/apache/incubator-nuttx/pull/2661) fs: file_dup2 shouldn't hold the file list lock
* [#2662](https://github.com/apache/incubator-nuttx/pull/2662) fs/inode/fs_files.c: fix DEBUGASSERT in romfs
* [#2667](https://github.com/apache/incubator-nuttx/pull/2667) fs: Make nx_vxxx and file_vxxx as internal functions
* [#2724](https://github.com/apache/incubator-nuttx/pull/2724) fs/tmpfs: Iterate the entry reversely in readdir
* [#2739](https://github.com/apache/incubator-nuttx/pull/2739) fs/readdir: Must reserve a byte for the NUL terminator
* [#2810](https://github.com/apache/incubator-nuttx/pull/2810) fs: eventfd: Convert the indent under EVENT_FD_VFS_PATH option to tab
* [#2852](https://github.com/apache/incubator-nuttx/pull/2852) fs: Merge fs_poll into poll_fdsetup
* [#2854](https://github.com/apache/incubator-nuttx/pull/2854) fs: Don't call _NX_SETERRNO in fopen and fdopen
* [#2861](https://github.com/apache/incubator-nuttx/pull/2861) fs: change geometry sizes from size_t to uint32_t
* [#2913](https://github.com/apache/incubator-nuttx/pull/2913) fs/lfs: lfs_file_sync() when littlefs_open
* [#2956](https://github.com/apache/incubator-nuttx/pull/2956) fs/mount: fix mount cmd break out when meet stat error
* [#3042](https://github.com/apache/incubator-nuttx/pull/3042) fs: vfs : Do some adjustments for epoll
* [#3060](https://github.com/apache/incubator-nuttx/pull/3060) fs: find_blockdriver: Don't ferr() on MTDs
* [#3069](https://github.com/apache/incubator-nuttx/pull/3069) fs/mmap: Clarify MAP_PRIVATE dependency on CONFIG_FS_RAMMAP
* [#3070](https://github.com/apache/incubator-nuttx/pull/3070) fs/mmap: Return EACCES for incompatible file descriptors
* [#3105](https://github.com/apache/incubator-nuttx/pull/3105) fs/epoll: correct the return value of epoll_ctl(2)
* [#3137](https://github.com/apache/incubator-nuttx/pull/3137) fs/littlefs: Suppport the duplication function
* [#3444](https://github.com/apache/incubator-nuttx/pull/3444) fs/romfs: fix open zero-byte file fail issue
* [#3491](https://github.com/apache/incubator-nuttx/pull/3491) fs: vfs: adjust the error code of write to be consistent with read

### Significant Improvements

* [#2598](https://github.com/apache/incubator-nuttx/pull/2598) fs/epoll: add asynchronous epoll control support
* [#2841](https://github.com/apache/incubator-nuttx/pull/2841) fs: procfs meminfo improvements
* [#2957](https://github.com/apache/incubator-nuttx/pull/2957) fs: mqueue: add poll support
* [#3045](https://github.com/apache/incubator-nuttx/pull/3045) fs: Allocate file/socket dynamically
* [#3212](https://github.com/apache/incubator-nuttx/pull/3212) fs/lfs: Update version to 2.4.0

## Networking

### Improvements

* [#2414](https://github.com/apache/incubator-nuttx/pull/2414) net: tcp: implement the fast retransmit
* [#2415](https://github.com/apache/incubator-nuttx/pull/2415) net: gmp: add MULTICAST_TTL support
* [#2417](https://github.com/apache/incubator-nuttx/pull/2417) net: wireless: add country code control support
* [#2548](https://github.com/apache/incubator-nuttx/pull/2548) net: tcp: optimize TCP handshake performance
* [#2695](https://github.com/apache/incubator-nuttx/pull/2695) netpacket: if_addr: add interface address header
* [#2899](https://github.com/apache/incubator-nuttx/pull/2899) net: socket: Unify socket into file system to avoid the code duplication
* [#2964](https://github.com/apache/incubator-nuttx/pull/2964) net: socket_rpmsg: add socket rpmsg support
* [#3025](https://github.com/apache/incubator-nuttx/pull/3025) net: Add sendmsg and recvmsg to syscall list
* [#3081](https://github.com/apache/incubator-nuttx/pull/3081) tcp_send_buffered.c: improve tcp write buffering
* [#3113](https://github.com/apache/incubator-nuttx/pull/3113) net: usrsock: add send multi-elements support
* [#3257](https://github.com/apache/incubator-nuttx/pull/3257) net: tcp: support bind the same port with different domain

### Bug Fixes

* [#1589](https://github.com/apache/incubator-nuttx/pull/1589) net: tcp: fix tcp socket close timeout if loss wireless connection
* [#2075](https://github.com/apache/incubator-nuttx/pull/2075) net: TCP-stack fix for stalled tcp sockets due to broken keepalive
* [#2121](https://github.com/apache/incubator-nuttx/pull/2121) net: devif: devif_callback.c: remove harmful debug check
* [#2257](https://github.com/apache/incubator-nuttx/pull/2257) net: callback: remove the assert check of conn instance
* [#2332](https://github.com/apache/incubator-nuttx/pull/2332) net/tcp: Rectified keepalive fix
* [#2412](https://github.com/apache/incubator-nuttx/pull/2413) net/icmp: add sanity check to avoid wild data length
* [#2413](https://github.com/apache/incubator-nuttx/pull/2413) net/tcp: correct the available iobs count if throttle is enabled
* [#2416](https://github.com/apache/incubator-nuttx/pull/2416) net/tcp: fallback to unthrottle pool to avoid deadlock
* [#2421](https://github.com/apache/incubator-nuttx/pull/2421) net/neighbor/neighbor_ethernet_out.c: fix build error without ICMPv6
* [#2465](https://github.com/apache/incubator-nuttx/pull/2465) net/procfs: handle opendir("/proc/net/") correctly
* [#2466](https://github.com/apache/incubator-nuttx/pull/2466) net/igmp: add sanity check to handle allocate fail
* [#2467](https://github.com/apache/incubator-nuttx/pull/2467) net/sockopt: Try usrsock further if the protocol not available
* [#2489](https://github.com/apache/incubator-nuttx/pull/2489) net: tcp: send the ACK in time after obtain ahead buffer from iobs
* [#2688](https://github.com/apache/incubator-nuttx/pull/2688) net: Remove duplicate forward references
* [#2774](https://github.com/apache/incubator-nuttx/pull/2774) net/ip: do not drop the udp packet from IP layer
* [#2811](https://github.com/apache/incubator-nuttx/pull/2811) net/local: Add an option to specify the prefix of named pipe
* [#2869](https://github.com/apache/incubator-nuttx/pull/2869) netdb.h: Add NI_MAXHOST and NI_MAXSERV
* [#2911](https://github.com/apache/incubator-nuttx/pull/2911) net: fix a few DP83848C and DP83825I constants
* [#2959](https://github.com/apache/incubator-nuttx/pull/2959) net: socket: move si_send/recv into sendmsg/recvmsg
* [#2978](https://github.com/apache/incubator-nuttx/pull/2978) telnet: fix crash about telnet client connect
* [#3037](https://github.com/apache/incubator-nuttx/pull/3037) Revert "net: tcp: Add DEBUGASSERT() in psock_tcp_send()"
* [#3043](https://github.com/apache/incubator-nuttx/pull/3043) net: local: Remove local_send.c since nobody use it now
* [#3044](https://github.com/apache/incubator-nuttx/pull/3044) net: fix local_sendmsg return length
* [#3062](https://github.com/apache/incubator-nuttx/pull/3062) net: tcp_sendfile.c: Remove an unused copy of CONFIG_NET_TCP_SPLIT_SIZE
* [#3099](https://github.com/apache/incubator-nuttx/pull/3099) net: tcp: dup: do not start the tcp monitor if unestablished
* [#3100](https://github.com/apache/incubator-nuttx/pull/3100) net: tcp: correct the port byte order
* [#3101](https://github.com/apache/incubator-nuttx/pull/3101) net: arp: add timeout to avoid infinite send wait
* [#3103](https://github.com/apache/incubator-nuttx/pull/3103) net: tcp: reset the connection ref count before tcp_free()
* [#3104](https://github.com/apache/incubator-nuttx/pull/3104) net: dev: check the available address further
* [#3106](https://github.com/apache/incubator-nuttx/pull/3106) net: if: remove the macro expansion of the public structure
* [#3221](https://github.com/apache/incubator-nuttx/pull/3221) net: tcp: tcp_send_buffered.c: Fix non-blocking I/O
* [#3254](https://github.com/apache/incubator-nuttx/pull/3254) net: arp: Fix arp
* [#3319](https://github.com/apache/incubator-nuttx/pull/3319) tcp_netpoll.c: Fix a performance issue with CONFIG_NET_TCP_WRITE_BUFFERS
  

# Security Issues Fixed In This Release
# Compatibility Concerns

## Changes to Build System

### Change CFLAGS, CPPFLAGS, CXXFLAGS, and AFLAGS from Recursive to Simple Assignment

[PR-1890](https://github.com/apache/incubator-nuttx/pull/1890) (commit [2caf3a69e3d60ec550980f7ba897c732e7a39df7](https://github.com/apache/incubator-nuttx/pull/1890/commits/2caf3a69e3d60ec550980f7ba897c732e7a39df7)) attempts to speed up compilation time for concurrent builds by changing assignment to makefile variables *CFLAGS*, *CPPFLAGS*, *CXXFLAGS*, and *AFLAGS* from recursive `=` to simple `:=`. This causes these compile options to be expanded only once during the build.

If you are using NuttX on a custom board not in the NuttX repository, you may want to make a similar change to your Make.defs files. Change these recursive assignments:
```

Code Block

language	text

CFLAGS = $(ARCHCFLAGS) $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS) -pipe
CXXFLAGS = $(ARCHCXXFLAGS) $(ARCHWARNINGSXX) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHXXINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS) -pipe
CPPFLAGS = $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS)
AFLAGS = $(CFLAGS) -D__ASSEMBLY__
```
to simple assignments:

...

Code Block

language	text


```
CFLAGS := $(ARCHCFLAGS) $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS) -pipe
CXXFLAGS := $(ARCHCXXFLAGS) $(ARCHWARNINGSXX) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHXXINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS) -pipe
CPPFLAGS := $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS)
AFLAGS := $(CFLAGS) -D__ASSEMBLY__
```
### Not Necessary to Define `__NuttX

...

__` in Make.defs

[PR-2192](https://github.com/apache/incubator-nuttx/pull/2192) (commit [9208176f600d0d04446531909bf05710716a5ee4](https://github.com/apache/incubator-nuttx/commit/9208176f600d0d04446531909bf05710716a5ee4)) refactors definition of the `__NuttX__` preprocessor symbol to

...

 `tools/Config.

...

mk`, so it is no longer necessary to define it in each board's Make.defs file.

...



If you are using NuttX on a custom board not in the NuttX repository, you may want to make a similar change to your Make.defs files.

...



Remove lines like this:

...

Code Block

language	text


```
ARCHDEFINES = -D__NuttX__
```
Or remove -D__NuttX__ from lines like this:

...

Code Block

language	text


```
CXXFLAGS += $(ARCHDEFINES) $(EXTRAFLAGS) -pipe -std=c++11 -D__NuttX__

...

```

More Information

How to Download

...

Page tree

Page History

Versions Compared

Old Version 24

New Version Current

Key

Work In Progress

What's New In This Release

Highlights

Major Changes to Core OS

New Features

Bug Fixes

Major Changes to the Build System

New Features

Bug Fixes

Architectural Support

New Architecture

Architectures with significant improvements

Minor changes

Simulator

New Features

Fixes

Documentation

New Features

Improvements

Driver Support

Bug Fixes

New Driver Support

Board Support

New Board Support

Boards With Significant Improvements

Minor Board Changes

File System

Bug Fixes

Significant Improvements

Networking

Applications

Improvements

Bug Fixes

Security Issues Fixed In This Release

Compatibility Concerns

Changes to Build System

Change CFLAGS, CPPFLAGS, CXXFLAGS, and AFLAGS from Recursive to Simple Assignment

More Information

How to Download