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DESK-MX9-L/Peripherals/GPIOs

20 bytes removed, 2 February

→‎Accessing the peripheral

Information about GPIOs library '''libgpiod''' - C library and tools - can be found on [https://git.kernel.org/pub/scm/libs/libgpiod/libgpiod.git/ git.kernel.org]

~~==== libgpiod example ====~~It is possible to ~~cross-~~compile <code>libgpiod</code> in the target (if the related Yocto package is not available for installation). Once the ''autoconf-archive'' package has been installed

<pre>

dnf install autoconf-archive

</pre>

Once installed, the <code>gpio</code> utilities are ~~availabel~~ available in the target:

</pre>

===== ~~gpio interrupt~~ gpiomon example ===== If a push button, with proper pull-up, is connected to a GPIO line available - for example using the J33.34 28 pin available on [[AURA_SOM/AXEL_Lite_Evaluation_Kit/Interfaces_and_Connectors/WIDE | SBC AXEL Lite WIDE]] connector - the related GPIO can be used as an interrupt:

* J33.28 is connected to J10.191 SO-DIMM pin

** J33 connector is the WIDE connector in the [[~~AURA_Lite_SOM~~AURA_SOM/~~AXEL_Lite_Evaluation_Kit~~ AURA_Evaluation_Kit | AURA Evaluation Kit]]

** J10 connector is the SO-DIMM connector in the AURA Evaluation Kit

** ALT-0 alternate function for this pin is <code>GPIO2_IO12</code>

^Croot@desk-mx93:~#

</pre>

===== gpioset example =====

For changing a GPIO output status, the <code>gpioset</code> utility can be used:

U0007

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