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Work In Progress

Work In Progress

NuttX X.Y 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

Major Changes to Core OS

New Features

Bug Fixes

Major Changes to the Build System

New Features

 * [#](https://github.com/apache/incubator-nuttx/pull/#)

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#](https://github.com/apache/incubator-nuttx/pull/#)

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#](https://github.com/apache/incubator-nuttx/pull/#)

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#](https://github.com/apache/incubator-nuttx/pull/#)

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 




Architectural Support

New Architecture Support

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

Bug Fixes

 * [#6070](https://github.com/apache/incubator-nuttx/pull/#6070) MPFS: Set correct interrupt per mode (M-/S-mode) for mtimer

 * [#6071](https://github.com/apache/incubator-nuttx/pull/#6071) arm/rtl8720c: Remove up_getsp which is already implemented in arch/arm/arch.h

 * [#6072](https://github.com/apache/incubator-nuttx/pull/#6072) arm/armv7-[a|r]: move fpu save/restore to assembly handler

 * [#6065](https://github.com/apache/incubator-nuttx/pull/#6065) RISC-V: Support for mtimer in S-mode

 * [#6063](https://github.com/apache/incubator-nuttx/pull/#6063) arch/stack_color: correct the stack top of running task

 * [#6062](https://github.com/apache/incubator-nuttx/pull/#6062) SAM3X HSMCI DMA Fixes

 * [#6060](https://github.com/apache/incubator-nuttx/pull/#6060) MPFS: Fix timer and exception/fault handling

 * [#6059](https://github.com/apache/incubator-nuttx/pull/#6059) arch/risc-v/riscv_misaligned: Correct sw source register

 * [#6056](https://github.com/apache/incubator-nuttx/pull/#6056) arch/stack_color: correct the end address of stack color

 * [#6054](https://github.com/apache/incubator-nuttx/pull/#6054) riscv/riscv_schedulesigaction.c: Remove the duplicate state saving

 * [#6051](https://github.com/apache/incubator-nuttx/pull/#6051) arch/risc-v: Add missing DMB to mtimer / setmtimecmp

 * [#6050](https://github.com/apache/incubator-nuttx/pull/#6050) RISC-V: Move mhartid to own assembly macro+function

 * [#6048](https://github.com/apache/incubator-nuttx/pull/#6048) arm/armv8-m: indicating no low-overhead-loop predication by default

 * [#6039](https://github.com/apache/incubator-nuttx/pull/#6039) arch/riscv: Move toolchain config to arch/risc-v/Kconfig like xtensa

 * [#6042](https://github.com/apache/incubator-nuttx/pull/#6042) arch/arm: Move FPU initialization to common place

 * [#6034](https://github.com/apache/incubator-nuttx/pull/#6034) arch/risc-v: Apply common mtime driver to mtime based chps

 * [#6022](https://github.com/apache/incubator-nuttx/pull/#6022) arch/risc-v: Apply misaligned access handler for k210/bl602

 * [#6006](https://github.com/apache/incubator-nuttx/pull/#6006) riscv/ESP32C3: Use the common exception handler

 * [#6020](https://github.com/apache/incubator-nuttx/pull/#6020) arch/riscv: Add mtimer driver

 * [#6008](https://github.com/apache/incubator-nuttx/pull/#6008) arch/risc-v: Attach exception handler in common place

 * [#5998](https://github.com/apache/incubator-nuttx/pull/#5998) arch/riscv: Minor style change and text correction

 * [#6001](https://github.com/apache/incubator-nuttx/pull/#6001) arm/armv[7|8]-m: skip the fpu save/restore if stack frame is integer-only

 * [#6003](https://github.com/apache/incubator-nuttx/pull/#6003) esp32c3: Simplify irq dispatch logic

 * [#5993](https://github.com/apache/incubator-nuttx/pull/#5993) MPFS: Prepare support for S-mode

 * [#5966](https://github.com/apache/incubator-nuttx/pull/#5966) arch:tcbinfo: update tcbinfo as xcpcontext update

 * [#5989](https://github.com/apache/incubator-nuttx/pull/#5989) arch/risc-v: Replace riscv_fault with riscv_exception

 * [#5970](https://github.com/apache/incubator-nuttx/pull/#5970) b-u585i-iot02a:nsh: Drop TrustedFirmware-M dependency

 * [#5974](https://github.com/apache/incubator-nuttx/pull/#5974) arch/risc-v: use STACK_FRAME_SIZE for in S-mode syscall asm

 * [#5979](https://github.com/apache/incubator-nuttx/pull/#5979) arch/xtensa: Build the xtensa_tcbinfo.c file for S2 and S3

 * [#5980](https://github.com/apache/incubator-nuttx/pull/#5980) RISC-V: Fix file name of riscv_dispatch_syscall

 * [#5987](https://github.com/apache/incubator-nuttx/pull/#5987) xtensa/esp32: Add support to TWAI/CANBus

 * [#5985](https://github.com/apache/incubator-nuttx/pull/#5985)  RISC-V: Combine 3 variables that depend on CPU amount into one

 * [#5981](https://github.com/apache/incubator-nuttx/pull/#5981) RISC-V: Fix usage of static_assert in riscv_percpu.c

 * [#5983](https://github.com/apache/incubator-nuttx/pull/#5983) arch/risc-v: Remove the unnecessary inclusion of board header files

 * [#](https://github.com/apache/incubator-nuttx/pull/#)

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#](https://github.com/apache/incubator-nuttx/pull/#)

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#5988](https://github.com/apache/incubator-nuttx/pull/#5988) arch/sim: support simulator keyboard devices

 * [#6043](https://github.com/apache/incubator-nuttx/pull/#6043) sim: bt: Add specific bluetooth HCI number id

Driver Support

Bug Fixes

 * [#6068](https://github.com/apache/incubator-nuttx/pull/#6068) driver/mmcsdio: do not hold the semaphore on interrupt context

 * [#6019](https://github.com/apache/incubator-nuttx/pull/#6019) power/governor: Remove the duplicated function prototype

 * [#6021](https://github.com/apache/incubator-nuttx/pull/#6021) Test/wm8904balance

 * [#6018](https://github.com/apache/incubator-nuttx/pull/#6018) Increase audio_comp driver flexibility

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

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 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 




New Driver Support

 * [#6030](https://github.com/apache/incubator-nuttx/pull/#6030)  Add Sensirion's SCD41 driver and minor fix

Drivers With Significant Improvements

Board Support

Significant Improvements

New Board Support

Boards With Significant Improvements

* [#6036](https://github.com/apache/incubator-nuttx/pull/#6036) arch, boards: cxd56xx: Minor update for spresense

* [#6074](https://github.com/apache/incubator-nuttx/pull/#6074) boards/arm/a1x: Remove the check CONFIG_ARCH_FPU around arm_fpuconfig

* [#5964](https://github.com/apache/incubator-nuttx/pull/#5964) boards/nucleo-f446re: support for SystemView

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 

 * [#](https://github.com/apache/incubator-nuttx/pull/#) 



File System

Bug Fixes

Significant Improvements

Networking

Applications

Improvements

Bug Fixes

Security Issues Fixed In This Release

Compatibility Concerns

Changes to Build System

Known Problems In This Release

More Information

How to Download

Release artifacts for all current and past NuttX releases can be downloaded at:

How to Clone the Git Repository

The Apache NuttX project uses Git SCM as its version control system.

There are two primary repositories:

  • nuttx - The real time operating system itself.
  • apps - Optional applications and example programs for the operating system. You can use this repository or make your own custom one.

The main "Single Source of Truth" repositories are hosted by the ASF:

These are synchronized with repositories hosted at GitHub:

How to Contact the Community

The main forum for project communication, to ask a question, get involved, or contribute to NuttX, is our mailing list, dev@nuttx.apache.org. The list is publicly archived and searchable at https://lists.apache.org/list.html?dev@nuttx.apache.org. For more information, see NuttX Community.

Enthusiastic Contributors Welcome!

NuttX is a free open-source project. If you'd like to participate, whether it's to enhance documentation (even these release notes) or dive into the nitty gritty of some low-level drivers, please join us! You can join the conversation at our dev mailing list by emailing dev-subscribe@nuttx.apache.org. The mailing list is open to the public and archived. You can browse older messages at https://lists.apache.org/list.html?dev@nuttx.apache.org.

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