Diff: src/LEDS.cpp

Revision:

2:825f572902c6

Parent:

1:b3907b8d9f65

--- a/src/LEDS.cpp	Mon Jun 25 21:01:02 2012 +0000
+++ b/src/LEDS.cpp	Mon Jun 25 21:20:22 2012 +0000
@@ -1,6 +1,9 @@
 #include "mbed.h"
 #include "LEDS.h"
 
+//Drive the rev LEDs
+
+//Initialise PWM pins
 LEDS::LEDS(PwmOut _pins[])
 {
     pins = _pins;    
@@ -8,27 +11,32 @@
     pins[0].period_us(100);
 }
 
+//Calculate new PWM values
 void LEDS::refresh(float rpm)
 {
     int value;
     int remainder;
     int i;
     
+    //Number of fully-lit LEDs
     value = rpm / RESOLUTION;
   
     for(i = 0; i < NUM_LEDS; i++)
     {          
         if(i < value)
-        {                
+        {   
+            //First LEDs on
             pins[i] = 1.0;
         }
         else if(i == value)
         {
+            //Last LED partially lit - calculate intensity and set.
             remainder = (int)rpm % RESOLUTION;
             pins[i] = (float)remainder / (float)RESOLUTION;
         }
         else
         {
+            //All others off
             pins[i] = 0.0;
         }
     }