Jorge Guzman 05832a4e62
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Documentation: system: cu: document the cu serial terminal
The cu application page was an empty stub. Document the command:
description, options, escape sequences, configuration dependencies
and limitations.

Also add an rs485 configuration to the linum-stm32h753bi board with
the two on-board RS-485 transceivers (UART4 and USART6) and the cu
terminal enabled, plus a board documentation section showing how to
bridge the console to one of the RS-485 buses with cu. The RS-485
DE pins are handled automatically by the serial driver.

Tested on hardware.

Signed-off-by: Jorge Guzman <jorge.gzm@gmail.com>
2026-07-13 09:35:18 -04:00
2026-07-11 14:55:59 -03:00
2026-05-20 15:17:00 +08:00
2026-07-11 14:55:59 -03:00

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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.

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