Diff: main.cpp

Revision:

0:5fc0791b9f3c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Nov 28 18:02:35 2014 +0000
@@ -0,0 +1,30 @@
+#include "mbed.h"
+//LED welding lighting effect
+PwmOut myled(LED1);
+//Use PWM output to enable LED dimming
+
+//Use Cs random number generator rand(), but scaled and
+//converted to a float 0.0 to 1.0 for PWM output
+inline float random_number()
+{
+    return (rand()/(float(RAND_MAX)));
+}
+
+int main()
+{
+    float x = 0.0;
+    while(1) {
+        //get a new random number for PWM
+        x = random_number();
+        //add some exponential brightness scaling
+        //for more of a fast flash effect
+        myled = x*x*x;
+        //fast update rate for welding flashes
+        wait(0.02);
+        //add a random pause between welds
+        if (random_number()>0.9925) {
+            myled=0.0;
+            wait(4.0*random_number());
+        }
+    }
+}
\ No newline at end of file