Synced to git.drogon.net

examples/okLed.c

@@ -1,7 +1,6 @@
 /*
- * okLed:
+ * okLed.c:
  *      Make the OK LED on the Pi Pulsate...
- *    Copyright (c) 2012 gordon Henderson, but please Share and Enjoy!
  *
  * Originally posted to the Raspberry Pi forums:
  *  http://www.raspberrypi.org/phpBB3/viewtopic.php?p=162581#p162581
@@ -10,6 +9,24 @@
  *    e.g. by putting it in /etc/rc.local and running it in the
  *    background &
  *
+ * Copyright (c) 2012-2013 Gordon Henderson. <projects@drogon.net>
+ ***********************************************************************
+ * This file is part of wiringPi:
+ *	https://projects.drogon.net/raspberry-pi/wiringpi/
+ *
+ *    wiringPi is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU Lesser General Public License as published by
+ *    the Free Software Foundation, either version 3 of the License, or
+ *    (at your option) any later version.
+ *
+ *    wiringPi is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU Lesser General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Lesser General Public License
+ *    along with wiringPi.  If not, see <http://www.gnu.org/licenses/>.
+ ***********************************************************************
  */
 
 #include <stdio.h>
@@ -17,6 +34,7 @@
 #include <string.h>
 #include <fcntl.h>
 #include <unistd.h>
+#include <math.h>
 
 #include <wiringPi.h>
 #include <softPwm.h>