Diff: main.cpp

Revision:

1:3bd9be707222

Parent:

0:f6c9b18d3e04

--- a/main.cpp	Tue Sep 29 03:03:58 2015 +0000
+++ b/main.cpp	Tue Sep 29 05:16:35 2015 +0000
@@ -1,46 +1,50 @@
+//This program moves an LED light right and left with two switches
+
 #include "mbed.h"
 
-DigitalIn sw1(p6);
-DigitalIn sw2(p7);
+DigitalIn sw1(p16);
+DigitalIn sw2(p17);
 BusOut LED(p26, p27, p28, p29, p30);
 
 
 int main()
 {
-    int LED_track = 4;
-    LED.write(LED_track);
-    int s1, s2;
+    int LED_track = 4;                            //initially light 3rd LED
+    LED.write(LED_track);                         //assigning LED light to a variable
+    int s1, s2;                                   //switch variables
 
-    while(1) {
-        s1 = sw1.read();
+    while(1) {                                    //while loop
+        s1 = sw1.read();                          //reads position of switches and assigns to a variable
         s2 = sw2.read();
 
-        if (s1 == 1 && s2 == 1) {
-            LED_track = 4;
-            LED.write(LED_track);
-        } else if (s1 == 1 && s2 == 0) {
-            if (LED_track > 1) {
-                LED_track = LED_track / 2;
-                LED.write(LED_track);
-                wait(0.5);
+        if (s1 == 1 && s2 == 1) {                 //both switches are on
+            LED_track = 4;                        //3rd LED initially lit
+            LED.write(LED_track);                 //assign LEDs to  variable
+        } else if (s1 == 1 && s2 == 0) {          //switch 1 is on and switch 2 is off
+            if (LED_track > 1) {                  //the far right light is not lit
+                LED_track = LED_track / 2;        //moves light to the right
+                LED.write(LED_track);             //reassign new LED variable
+                wait(0.5);                        //wait 0.5 seconds
             } else {
-                LED_track = 16;
-                LED.write(LED_track);
-                wait(0.5);
+                LED_track = 16;                   //after the last light is lit this moves the light to the far left
+                LED.write(LED_track);             //reassign new LED variable
+                wait(0.5);                        //wait 0.5 seconds
             }
-        } else if (s1 == 0 && s2 ==1) {
-            if (LED_track < 16) {
-                LED_track = LED_track * 2;
-                LED.write(LED_track);
-                wait(0.5);
+        } else if (s1 == 0 && s2 ==1) {           //switch 1 is off and switch 2 is on
+            if (LED_track < 16) {                 //far left light is not lit
+                LED_track = LED_track * 2;        //moves light to the right
+                LED.write(LED_track);             //reassign new LED variable
+                wait(0.5);                        //wait 0.5 seconds
             } else {
-                LED_track = 16;
-                LED.write(LED_track);
-                wait(0.5);
+                LED_track = 16;                   //moves the light back to the far right
+                LED.write(LED_track);             //reassign new LED variable
+                wait(0.5);                        //wait 0.5 seconds
             }
+        } else if (s1 == 0 && s2 ==0) {           //switch one is off and switch 2 is off
+            LED_track = 16;                       //far left LED is lit
+            LED.write(LED_track);                 //reassign new LED variable
         }
 
 
-
     }
 }
\ No newline at end of file