Hardware Usage | Radxa Docs

[giscus[bot]]

Hardware Usage | Radxa Docs

This section introduces how to use the board hardware interfaces.

https://docs.radxa.com/en/cubie/a7s/hardware-use/hardware-info

[countofkrakow]

Is there an example of how to use the GPIO pins?

[countofkrakow]

how does this guide translate to the A7s? Specifically how do I map GPIO pins?

https://docs.radxa.com/en/cubie/a7z/hardware-use/pin-gpio

[tangzz-radxa]

Yes — the Radxa docs have comprehensive GPIO examples using the Linux libgpiod library (the modern replacement for the deprecated sysfs GPIO interface).

Command-line examples:

• gpioinfo — list all GPIO lines on a chip
• gpioget — read GPIO input
• gpioset — set GPIO output
• gpiomon — monitor GPIO events
• gpiofind — resolve a pin name to chip/line number

Example (read PIN_27):

gpioget $(gpiofind PIN_27)

Example (set PIN_11 high, persistent mode):

gpioset -m signal gpiochip0 2=1

Programming:

• C: sudo apt install libgpiod-dev — kernel.org examples
• Python: sudo apt install python3-libgpiod — python examples

The exact chip/line numbers vary by product. You can find the right values for your board under the App Development / GPIO section of your product docs (e.g. ROCK 5B GPIO).

Note that different Radxa boards use different SoC GPIO families (Rockchip or Amlogic), which affects how GPIO numbers map to libgpiod chip/line offsets. See the Rockchip / Amlogic vendor-to-libgpiod mapping section on the shared GPIO page for details.

[tangzz-radxa]

Replied with libgpiod examples on GitHub: #1500 (reply in thread)

[tangzz-radxa]

Hi @countofkrakow, the Cubie A7 hardware-info page documents the 30-pin and 15-pin GPIO header pinouts (see the "30-pin GPIO header" and "15-pin GPIO header" sections):

https://docs.radxa.com/en/cubie/a7s/hardware-use/hardware-info

However, specific code examples (e.g., GPIO access via Python or C) are not yet included in the documentation for the Cubie A7. If you have a specific use case in mind, feel free to open a docs issue requesting an example and we can look into adding it.