eea880f1ac
The Pimoroni Pico Plus 2 W is a Pico form-factor board built around the
RP2350B, the 80-pin part with 48 GPIOs, carrying 16MB of flash, 8MB of PSRAM
and a Raspberry Pi RM2 module for 2.4GHz WiFi. The RM2 houses an Infineon
CYW43439, wired to the same pins the Raspberry Pi Pico W uses: GPIO 23 for
power enable, 24 for the shared gSPI data and interrupt line, 25 for chip
select and 29 for the clock.
Three configurations are provided: nsh and usbnsh without the wireless chip,
and wifi, which brings up wlan0 in station mode with WAPI, a DHCP client and
ping. The CYW43439 firmware and CLM blob are linked in from the pico-sdk at
build time, as on the Pico W; CONFIG_CYW43439_FIRMWARE_BIN_PATH selects the
file and the board documentation covers converting it out of the C header that
pico-sdk 2.x ships in place of the binary. rp23xx_firmware.c is placed in the
common source directory so that a future board with the same chip can reuse
it, and unlike rp2040 the blob is staged for the CMake build as well.
Two board details are worth calling out:
- The only LED is wired to GPIO 0 of the CYW43439 rather than to a pin of
the RP2350, so driving it means an iovar request over the gSPI bus. That
works for CONFIG_USERLED but not for CONFIG_ARCH_LEDS, whose
board_autoled_on() is called from interrupt handlers and from assertion
handling, so a build selecting CONFIG_ARCH_LEDS is rejected with an
explicit message. The LED also only responds once wlan0 has been brought
up, because that is when the chip's firmware is downloaded.
- The BOOT button is also wired to GPIO 45, so it can be read as an ordinary
user button once NuttX is running. Its internal pull-up is enabled
deliberately: erratum RP2350-E9 means a floating Bank 0 input on RP2350 A2
leaks enough current to settle around 2.2V, which the internal pull-down
cannot overcome.
Tested on the board with a Raspberry Pi Debug Probe: nsh and wifi boot on
UART0, wlan0 reports the MAC read from the chip, wapi scan lists access
points, and association to a WPA2 network followed by DHCP gives a working
route with ping succeeding to both a literal address and a resolved name.
The LED and the BOOT button were confirmed by hand.
Assisted-by: Claude Code:claude-opus-5
Signed-off-by: Marco Casaroli <marco.casaroli@gmail.com>
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| .github | ||
| arch | ||
| audio | ||
| binfmt | ||
| boards | ||
| cmake | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| dummy | ||
| fs | ||
| graphics | ||
| include | ||
| libs | ||
| mm | ||
| net | ||
| openamp | ||
| pass1 | ||
| sched | ||
| syscall | ||
| tools | ||
| video | ||
| wireless | ||
| .asf.yaml | ||
| .codespell-ignore-lines | ||
| .codespellrc | ||
| .editorconfig | ||
| .gitignore | ||
| .gitmessage | ||
| .pre-commit-config.yaml | ||
| .yamllint | ||
| AUTHORS | ||
| CMakeLists.txt | ||
| CONTRIBUTING.md | ||
| INVIOLABLES.md | ||
| Kconfig | ||
| LICENSE | ||
| Makefile | ||
| NOTICE | ||
| README.md | ||
| ReleaseNotes | ||
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.