Diff: main.cpp

Revision:

0:e381f9305692

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Sep 24 15:17:40 2013 +0000
@@ -0,0 +1,55 @@
+#include "mbed.h"
+
+// redled is an object of class PwmOut. It uses the LED_RED pin
+// in human speech: redled is an output that can be controlled with PWM. LED_RED is the pin which is connected to the output
+PwmOut redled(LED_RED);
+
+//ditto...
+PwmOut greenled(LED_GREEN);
+PwmOut blueled(LED_BLUE);
+
+// pot is an object of class AnalogIn. It uses the PTB0 pin
+// in human speech: pot is an analog input. You can read the voltage on pin PTB0
+AnalogIn pot(PTB0);
+
+
+//start 'main' function. Should be done once in every C(++) program
+int main()
+{
+    float potvalue;
+    //setup some stuff
+    //period of PWM signal is 10kHz. Every 100 microsecond a new PWM period is started
+    redled.period_ms(0.1);
+    greenled.period_ms(0.1);
+    blueled.period_ms(0.1);
+    //while 1 is unequal to zero. For humans: loop forever
+    while(1)
+    {
+        //limit loop time
+        wait(0.01);
+        //read potentiometer, store in potvalue
+        potvalue = pot.read();
+        if(potvalue < 0.33)
+        {
+            redled = 1-potvalue; //subtract from 1 to get high value (almost off) at potmeter maximum
+            greenled = 1; //off
+            blueled  = 1; //off
+        }
+        else // value greater or equal to 0.33
+        {
+            if(potvalue < 0.66)
+            {
+                redled = 1-potvalue;
+                greenled = 1-potvalue;
+                blueled = 1;
+            }
+            else //value greater or equal to 0.66
+            {
+                redled = 1-potvalue;
+                greenled = 1-potvalue;
+                blueled = 1-potvalue;
+            }
+        }
+    }
+}
+