Diff: button.cpp

Revision:

4:549d1d8ca969

Parent:

3:998b7d011f2a

Child:

6:1eee8ba927fe

--- a/button.cpp	Wed Oct 14 21:09:51 2015 +0000
+++ b/button.cpp	Thu Oct 15 16:34:35 2015 +0000
@@ -1,15 +1,25 @@
 #include "button.h"
 
+// Button constructor.
 Button::Button(string name)
 {
+    // Set the "pin" attribute to a DigitalIn object corresponding
+    // to the pin for the selected button (only one button at the
+    // moment.
     if (name == "user") {
         this->pin = new DigitalIn(PA_0);
     }
 }
 
+// isPressed method: Return true if the button is currently pressed
+// and false otherwise.
 bool Button::isPressed()
 {
-    if (this->pin->read() == 1) {
+    // Get current state of the pin.
+    int pinValue = this->pin->read();
+    
+    // Check the value returned from this->pin->read() and return true or false.
+    if (pinValue == 1) {
         return true;
     } else {
         return false;