Dan Minear / Mbed 2 deprecated led_dimmer

My first program to create a chase pattern with the on-board LEDs, but this uses the concept of a rotating phasor and pulse width modulation to dim the LEDs.

Dependencies:   mbed

Diff: main.cpp

Revision:
0:cf65b0672fcd
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Nov 30 15:05:44 2010 +0000
@@ -0,0 +1,43 @@
+/* Chase pattern using a rotating phasor
+ * Dan Minear
+ * 2010-11-20
+*/
+
+#include "mbed.h"
+#include "math.h"
+
+Serial pc(USBTX, USBRX); // tx, rx
+PwmOut led1(LED1);
+PwmOut led2(LED2);
+PwmOut led3(LED3);
+PwmOut led4(LED4);
+
+float brightness = 0.0;
+float factor = 0.01;
+
+int main() {
+    pc.printf("\nPress 'u' or 'd'\n");
+    char c;
+    float angle = 0;
+    float factor = 0.01;
+    
+    while(1) {
+        if (pc.readable()) {
+            c = pc.getc();
+            if (c == 'u') { factor += 0.01; }
+            if (c =='d') { factor -= 0.01; }
+        }
+        angle += factor;
+        if (angle > 2 * 3.14159 ) { angle = 0; }
+        
+        led1 = (sin(angle) / 2)/2;
+        led2 = (sin(angle + 3.1416 / 4))/2;
+        led3 = (sin(angle + 3.1416 / 2))/2;
+        led4 = (sin(angle + 3.1416 * 3 / 4))/2;
+        
+        wait(0.01);
+    }
+}
+
+
+