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+This directory contains three different example directories that contain
+documentation and examples for interacting with the GPIO resources on the Altas
+board.
+
+raw-gpio - contains a README file that describes how to discover and interact
+           with the gpio framework provided by the linux environment on the
+           DE10-Nano target.  There is a script and two C programs that
+           demonstrate how to programmatically detect the state of the KEY0 push
+           button on the DE10-Nano board.  The script and one C program simply
+           read the state, output it and exit, the second C program enables the
+           interrupt functionality for the GPIO and waits for the push button
+           press to generate the interrupt that it waits for.
+
+gpio-keys - contains a README file that describes how to discover and interact
+            with the gpio-keys framework provided by the linux environment on
+            the DE10-Nano target.  There is a script and two C programs that
+            demonstrate how to programmatically detect the input events
+            generated by the SW0, SW1, SW2 and SW3 switches on the DE10-Nano
+            board.  The script and one C program simply report the input events
+            as they are detected, the second C program adds a call to the
+            ioctl() function to read the current state of all four switches as
+            each input event is processed.
+
+gpio-leds - contains a README file that describes how to discover and interact
+            with the gpio-leds framework provided by the linux environment on
+            the DE10-Nano target.  There is a script and a C program that
+            demonstrate how to programmatically control the LEDS on the
+            DE10-Nano board.
+
+Please see the README files in each sub directory for more information.
+