55 lines
1.7 KiB
C++
55 lines
1.7 KiB
C++
/*
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* Interrupt and PWM utilities for 16 bit Timer1 on ATmega168/328
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* Original code by Jesse Tane for http://labs.ideo.com August 2008
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* Modified March 2009 by Jérôme Despatis and Jesse Tane for ATmega328 support
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* Modified June 2009 by Michael Polli and Jesse Tane to fix a bug in setPeriod() which caused the timer to stop
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* Modified Oct 2009 by Dan Clemens to work with timer1 of the ATMega1280 or Arduino Mega
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* Modified April 2012 by Paul Stoffregen
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* Modified again, June 2014 by Paul Stoffregen
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* Modified July 2017 by Stoyko Dimitrov - added support for ATTiny85 except for the PWM functionality
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*
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* This is free software. You can redistribute it and/or modify it under
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* the terms of Creative Commons Attribution 3.0 United States License.
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* To view a copy of this license, visit http://creativecommons.org/licenses/by/3.0/us/
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* or send a letter to Creative Commons, 171 Second Street, Suite 300, San Francisco, California, 94105, USA.
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*
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*/
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#include "TimerOne.h"
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TimerOne Timer1; // preinstatiate
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unsigned short TimerOne::pwmPeriod = 0;
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unsigned char TimerOne::clockSelectBits = 0;
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void (*TimerOne::isrCallback)() = TimerOne::isrDefaultUnused;
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// interrupt service routine that wraps a user defined function supplied by attachInterrupt
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#if defined (__AVR_ATtiny85__)
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ISR(TIMER1_COMPA_vect)
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{
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Timer1.isrCallback();
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}
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#elif defined(__AVR__)
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ISR(TIMER1_OVF_vect)
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{
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Timer1.isrCallback();
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}
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#elif defined(__arm__) && defined(CORE_TEENSY)
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void ftm1_isr(void)
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{
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uint32_t sc = FTM1_SC;
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#ifdef KINETISL
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if (sc & 0x80) FTM1_SC = sc;
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#else
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if (sc & 0x80) FTM1_SC = sc & 0x7F;
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#endif
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Timer1.isrCallback();
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}
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#endif
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void TimerOne::isrDefaultUnused()
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{
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}
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