From c788dd71a3ff5c850c81f3cce4e6fc66879a33f2 Mon Sep 17 00:00:00 2001
From: "Mark A. Yoder" <Mark.A.Yoder@Rose-Hulman.edu>
Date: Wed, 14 Jun 2023 14:07:50 -0400
Subject: [PATCH] Starting to remove JavaScript and add C
---
.../beaglebone-cookbook/02sensors/sensors.rst | 22 ++++++++++++++-----
1 file changed, 17 insertions(+), 5 deletions(-)
diff --git a/books/beaglebone-cookbook/02sensors/sensors.rst b/books/beaglebone-cookbook/02sensors/sensors.rst
index 877ec229..7e50b75a 100644
--- a/books/beaglebone-cookbook/02sensors/sensors.rst
+++ b/books/beaglebone-cookbook/02sensors/sensors.rst
@@ -126,7 +126,7 @@ By default, it takes you to your home directory. Notice that the prompt has chan
.. code-block::
- root@beaglebone:~/boneSensors# ./pushbutton.js
+ debian@beaglebone:beaglebone-cookbook/code/02sensors$ ./pushbutton.py
data= 0
data= 0
data= 1
@@ -178,13 +178,13 @@ reads GPIO port *P9_42*, which is attached to the pushbutton.
:download:`pushbutton.py <../code/02sensors/pushbutton.py>`
-.. _js_pushbutton_code:
+.. _c_pushbutton_code:
-.. literalinclude:: ../code/02sensors/pushbutton.js
- :caption: Monitoring a pushbutton (pushbutton.js)
+.. literalinclude:: ../code/02sensors/pushbutton.c
+ :caption: Monitoring a pushbutton (pushbutton.c)
:linenos:
-:download:`pushbutton.js <../code/02sensors/pushbutton.js>`
+:download:`pushbutton.c <../code/02sensors/pushbutton.c>`
Put this code in a file called *pushbutton.py* following the steps in :ref:`sensors_getting_started`.
In the VSC *bash* tab, run it by using the following commands:
@@ -202,6 +202,18 @@ The command runs it. Try pushing the button. The code reads the pin and prints i
You will have to press ^C (Ctrl-C) to stop the code.
+If you want to run the C version do:
+
+.. code-block:: bash
+
+ bone$ gcc -o pushbutton pushbutton.c -lgpiod
+ bone$ ./pushbutton
+ data = 0
+ data = 0
+ data = 1
+ data = 1
+ ^C
+
If you want to use the magnetic reed switch wired as shown in
:ref:`js_pushbutton_fig`, change *P9_42* to *P9_26* which is gpio *14*.
--
GitLab