Apache NuttX is a mature, real-time embedded operating system (RTOS) https://nuttx.apache.org/
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dechao_gong c36e45eb6f arch/arm/rtl8721f: add timer driver support
Wire the RTL8721F (amebagreen2) into the shared Ameba timer driver
(arch/arm/src/common/ameba/ameba_timer.c), registered at /dev/timer0
(TIM1) and /dev/timer1 (TIM2).  Only the per-chip base addresses, RCC
masks and IRQs differ, so this adds a small ameba_timer_chip.h (the two
32-bit basic LTIM timers at 0x40819200 / 0x40819400, 32.768 kHz,
APBPeriph_LTIM1/2, IRQ_TIMER1/2, verified against the SoC hal_platform.h
/ sysreg_lsys.h / vector table) plus the Make.defs/CMakeLists build
hooks, the fwlib ram_common/ameba_tim.c RAM source (now also pulled in
by CONFIG_AMEBA_TIMER, matching the PWM rule), the board bring-up
registration and a timer defconfig.  The shared driver is unchanged.

TIM0 is left untouched because the boot ROM claims it as the always-on
system timer; reprogramming it would break every SDK delay.

Assisted-by: Claude <noreply@anthropic.com>
Signed-off-by: dechao_gong <dechao_gong@realsil.com.cn>
2026-09-01 17:41:14 +08:00
.github build(deps): bump docker/setup-buildx-action from 4.2.0 to 4.3.0 2026-08-24 15:30:16 +08:00
arch arch/arm/rtl8721f: add timer driver support 2026-09-01 17:41:14 +08:00
audio audio: limit the buffer count guard to shared ring requests 2026-08-05 07:58:53 +02:00
binfmt sched: add supplementary group IDs (setgroups/getgroups/initgroups) 2026-08-12 16:06:03 -03:00
boards arch/arm/rtl8721f: add timer driver support 2026-09-01 17:41:14 +08:00
cmake cmake: parse EXTRAFLAGS with separate_arguments. 2026-09-01 09:19:27 +08:00
crypto tools: fix stale archive members surviving a Kconfig-driven CSRCS change 2026-07-28 21:26:03 -03:00
Documentation arch/arm/rtl8721f: add timer driver support 2026-09-01 17:41:14 +08:00
drivers input/gt9xx: fix register write and no-contact read 2026-08-31 16:16:21 +08:00
dummy build: add initial cmake build system 2023-07-08 13:50:48 +08:00
fs fs: fix pre-existing nxstyle issues in touched files 2026-08-28 23:07:24 +08:00
graphics graphics/nxterm: consume SGR escape sequences 2026-08-23 10:46:02 +08:00
include arch/arm/src/imxrt: Unify FlexCAN TX work and add SIOCGCANERRORS. 2026-09-01 17:40:47 +08:00
libs libs/libc/machine/arm: Fix the nxstyle errors in arch_elf.c. 2026-09-01 09:16:39 +08:00
mm cmake: Use NUTTX(_DIR/_BIN_DIR) instead CMAKE(_SRC_DIR/_BIN_DIR) 2026-08-09 11:13:08 -03:00
net net, arch: Fix nxstyle errors in files the CAN ioctl merge touches. 2026-09-01 17:40:47 +08:00
openamp cmake: Use NUTTX(_DIR/_BIN_DIR) instead CMAKE(_SRC_DIR/_BIN_DIR) 2026-08-09 11:13:08 -03:00
pass1 tools: fix stale archive members surviving a Kconfig-driven CSRCS change 2026-07-28 21:26:03 -03:00
sched sched/setparam: update sporadic parameters of the target task 2026-08-29 11:14:34 -03:00
syscall fs: rename PSEUDOFS_SOFTLINKS to FS_LINKS 2026-08-27 01:12:33 +08:00
tools tools/ci: add qemu-system-x86 to the linux CI image 2026-08-31 08:54:00 -03:00
video video/videomode: Fix EDID parsing and formatting of video mode dumps 2026-08-29 11:09:11 -03:00
wireless wireless/bluetooth: fix inverted MTU cap in bt_conn_send() 2026-08-30 10:48:18 -03:00
.asf.yaml github: master branch protection tune. 2025-05-07 18:37:13 -05:00
.codespell-ignore-lines arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
.codespellrc Revert "zbus: Add linker support and documentation for the zbus port" 2026-08-30 10:45:19 -03:00
.editorconfig .editorconfig: fix character encoding property specification 2025-11-28 19:12:13 +08:00
.gitignore boards/risc-v/eic7700x: Adopt the common board layout. 2026-08-19 01:40:57 +08:00
.gitmessage docs/contributing: Add a commit message template 2025-06-03 17:33:24 +08:00
.pre-commit-config.yaml pre-commit: enable codespell checks 2025-05-05 12:34:39 +08:00
.yamllint feat: add a GitHub action to lint the YAML files 2020-12-15 09:52:04 -06:00
AUTHORS AUTHORS: add Jorge Guzman 2026-08-25 08:43:13 -04:00
CMakeLists.txt include/nuttx: Add link-time iterable sections infrastructure 2026-08-27 01:04:05 +08:00
CONTRIBUTING.md contributing: Add requirement for 'Assisted-by' commit field 2026-07-12 09:42:28 +08:00
INVIOLABLES.md INVIOLABLES.md: Fix a simple alignment and change occurrences of Nuttx 2020-09-03 01:33:05 +08:00
Kconfig include/nuttx: Add link-time iterable sections infrastructure 2026-08-27 01:04:05 +08:00
LICENSE libs/libdsp: Add Matrix operations 2026-07-11 14:55:59 -03:00
Makefile !boards: enforce secure ROMFS passwd and TEA key setup 2026-07-09 22:41:11 +08:00
NOTICE Remove the double blank line from source files 2022-02-20 20:10:14 +01:00
README.md ci/testing: Add MemBrowse Integration 2026-06-18 12:07:41 -03:00
ReleaseNotes Documentation: move ReleaseNotes 2023-09-26 20:41:00 +08:00

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Apache NuttX is a real-time operating system (RTOS) with an emphasis on standards compliance and small footprint. Scalable from 8-bit to 64-bit microcontroller environments, the primary governing standards in NuttX are POSIX and ANSI standards. Additional standard APIs from Unix and other common RTOSs (such as VxWorks) are adopted for functionality not available under these standards, or for functionality that is not appropriate for deeply-embedded environments (such as fork()).

For brevity, many parts of the documentation will refer to Apache NuttX as simply NuttX.

Getting Started

First time on NuttX? Read the Getting Started guide! If you don't have a board available, NuttX has its own simulator that you can run on terminal.

Documentation

You can find the current NuttX documentation on the Documentation Page.

Alternatively, you can build the documentation yourself by following the Documentation Build Instructions.

The old NuttX documentation is still available in the Apache wiki.

Supported Boards

NuttX supports a wide variety of platforms. See the full list on the Supported Platforms page.

Contributing

If you wish to contribute to the NuttX project, read the Contributing guidelines for information on Git usage, coding standard, workflow and the NuttX principles.

License

The code in this repository is under either the Apache 2 license, or a license compatible with the Apache 2 license. See the License Page for more information.