From bfc6da086942e9c66d103ad0063178e5bc8597c7 Mon Sep 17 00:00:00 2001
From: "Mark A. Yoder" <Mark.A.Yoder@Rose-Hulman.edu>
Date: Tue, 10 Oct 2023 17:52:30 -0400
Subject: [PATCH] Added polling section
---
intro/blinkLED.rst | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/intro/blinkLED.rst b/intro/blinkLED.rst
index d504ff52..fa5ec2e3 100644
--- a/intro/blinkLED.rst
+++ b/intro/blinkLED.rst
@@ -428,8 +428,8 @@ try modifying the earler *bash* script to use `gpiod` instead of `echo`.
The following may not work on all Beagles since it depends on which
version of Debian you are running.
-Blinking in response to a button
----------------------------------
+Blinking in response to a button event
+--------------------------------------
Some Beagles have a **USR** button that can be used to control the LEDs.
You can test the **USR** button with ``evtest``
@@ -504,6 +504,9 @@ Try modifying the code to turn on a different LED. Try blinking 2 or 3
LEDs when the button is pressed. Can you toggle an LED each time the
button is pressed?
+Blinking in response to a button poll
+-------------------------------------
+
The next script polls the USR button and toggles the LED rather that waiting
for an event.
--
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