In this tutorial, we will be try to use a normally locked pin as a general input pin. Actually,if we check properly the datasheet of LM4F120H5QR and the
schematics, then we can see that the SW1 is actually connected to PF1 which is also having an additional function of NMI which means a
non maskable interrupt which is a powerfull and essentialfeature. But right now, i am interested in blinking an LED using this particular pin. Actually, it is
easy, but a newbie wont be able too find how to do it easily. This is what forced me write this tutorial.
In this tutorial actually the comments are more than enough to explain what is being done and therefore i am not actually including any additional
documentation on how it is to be done because I find it pointless and moreover as a waste of time. If you find it hard to understand the code,
please contact us. We will be happy to help you.