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arduino-cli/libraries/TimerOne/TimerOne.cpp

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+/*
+ *  Interrupt and PWM utilities for 16 bit Timer1 on ATmega168/328
+ *  Original code by Jesse Tane for http://labs.ideo.com August 2008
+ *  Modified March 2009 by Jérôme Despatis and Jesse Tane for ATmega328 support
+ *  Modified June 2009 by Michael Polli and Jesse Tane to fix a bug in setPeriod() which caused the timer to stop
+ *  Modified Oct 2009 by Dan Clemens to work with timer1 of the ATMega1280 or Arduino Mega
+ *  Modified April 2012 by Paul Stoffregen
+ *  Modified again, June 2014 by Paul Stoffregen
+ *
+ *  This is free software. You can redistribute it and/or modify it under
+ *  the terms of Creative Commons Attribution 3.0 United States License. 
+ *  To view a copy of this license, visit http://creativecommons.org/licenses/by/3.0/us/ 
+ *  or send a letter to Creative Commons, 171 Second Street, Suite 300, San Francisco, California, 94105, USA.
+ *
+ */
+
+#include "TimerOne.h"
+
+TimerOne Timer1;              // preinstatiate
+
+unsigned short TimerOne::pwmPeriod = 0;
+unsigned char TimerOne::clockSelectBits = 0;
+void (*TimerOne::isrCallback)() = NULL;
+
+// interrupt service routine that wraps a user defined function supplied by attachInterrupt
+#if defined(__AVR__)
+ISR(TIMER1_OVF_vect)
+{
+  Timer1.isrCallback();
+}
+
+#elif defined(__arm__) && defined(CORE_TEENSY)
+void ftm1_isr(void)
+{
+  uint32_t sc = FTM1_SC;
+  #ifdef KINETISL
+  if (sc & 0x80) FTM1_SC = sc;
+  #else
+  if (sc & 0x80) FTM1_SC = sc & 0x7F;
+  #endif
+  Timer1.isrCallback();
+}
+
+#endif