**Purpose**

Toggle the green led when user2 button is used from userland.


**Hardware**

Available for:

-stm32mp157c-ev1 (green led and user button connected to PA14).
-stm32mp157c-dk2 (green led and user button connected to PA14).

**How to use**

./button_gpio_exti.sh

**Note**

-A7-example device tree has not to be used in this case.
