How to use a potentiometer to change the duty cycle of a PWM signal

Dependencies:   mbed

Revision:
0:1ece86581178
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Nov 04 18:23:56 2012 +0000
@@ -0,0 +1,17 @@
+#include "mbed.h"
+ 
+PwmOut led(LED1);  // Led on board
+PwmOut green(p25); // A green led is connected at Pin25 with resistor to ground
+
+AnalogIn ain(p20); // Potmeter 810k connected between VOUT(3.3V Pin40) and GND (Pin1) with the wiper connect to Pin20 
+ 
+int main() {
+    green.period_us(100); // Set the period to 100uS = 10kHz
+    led.period_ms(10);    // Set the period to 10mS = 100Hz
+                          // Both periods will be set on 10mS, because the same timer is used for both
+                          // Changing the period for one wil change the period for the others also
+    while(1) { 
+             led = ain;     // Set duty cycle for LED1
+             green = ain/2; // Set duty cycle for the green led, the "on" time will only the half of the period
+        }
+    }
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