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84 lines
3.8 KiB
C
84 lines
3.8 KiB
C
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/* IRLibMatch.h from IRLib <20> an Arduino library for infrared encoding and decoding
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* Version 1.0 January 2013
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* Copyright 2013 by Chris Young http://cyborg5.com
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*
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* This library is a major rewrite of IRemote by Ken Shirriff which was covered by
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* GNU LESSER GENERAL PUBLIC LICENSE which as I read it allows me to make modified versions.
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* That same license applies to this modified version. See his original copyright below.
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* The latest Ken Shirriff code can be found at https://github.com/shirriff/Arduino-IRremote
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* My purpose was to reorganize the code to make it easier to add or remove protocols.
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* As a result I have separated the act of receiving a set of raw timing codes from the act of decoding them
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* by making them separate classes. That way the receiving aspect can be more black box and implementers
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* of decoders and senders can just deal with the decoding of protocols.
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* Also added provisions to make the classes base classes that could be extended with new protocols
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* which would not require recompiling of the original library nor understanding of its detailed contents.
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* Some of the changes were made to reduce code size such as unnecessary use of long versus bool.
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* Some changes were just my weird programming style. Also extended debugging information added.
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*/
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/*
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* IRremote
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* Version 0.1 July, 2009
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* Copyright 2009 Ken Shirriff
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* For details, see http://arcfn.com/2009/08/multi-protocol-infrared-remote-library.htm http://arcfn.com
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*
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* Interrupt code based on NECIRrcv by Joe Knapp
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* http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1210243556
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* Also influenced by http://zovirl.com/2008/11/12/building-a-universal-remote-with-an-arduino/
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*/
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#ifndef IRLibMatch_h
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#define IRLibMatch_h
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/*
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* This is some miscellaneous definition that is needed by the decoding routines.
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* You need not include this file unless you are creating custom decode routines
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* which will require these macros and definitions. Even if you include it, you probably
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* don't need to be intimately familiar with the internal details.
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*/
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// Marks tend to be 100us too long, and spaces 100us too short
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// when received due to sensor lag.
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#define MARK_EXCESS 100
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#define USECPERTICK 50 // microseconds per clock interrupt tick
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#if 0
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#define TOLERANCE 25 // percent tolerance in measurements
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#define TICKS_LOW(us) (int) (((us)*(1.0 - TOLERANCE/100.)/USECPERTICK))
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#define TICKS_HIGH(us) (int) (((us)*(1.0 + TOLERANCE/100.)/USECPERTICK + 1))
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#else
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#define TICKS_LOW(us) (((us) - (us>>2))/USECPERTICK)
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#define TICKS_HIGH(us) (((us) + (us>>2))/USECPERTICK)
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#endif
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#ifdef DEBUG
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int MATCH(int measured, int desired);
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int MATCH_MARK(int measured_ticks, int desired_us);
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int MATCH_SPACE(int measured_ticks, int desired_us);
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#else
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#define MATCH(measured_ticks, desired_us) ((measured_ticks) >= TICKS_LOW(desired_us) && (measured_ticks) <= TICKS_HIGH(desired_us))
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#define MATCH_MARK(measured_ticks, desired_us) MATCH(measured_ticks, (desired_us) + MARK_EXCESS)
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#define MATCH_SPACE(measured_ticks, desired_us) MATCH((measured_ticks), (desired_us) - MARK_EXCESS)
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#endif
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#ifdef TRACE
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void ATTEMPT_MESSAGE(const __FlashStringHelper * s);
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byte REJECTION_MESSAGE(const __FlashStringHelper * s);
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#define RAW_COUNT_ERROR REJECTION_MESSAGE(F("number of raw samples"));
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#define HEADER_MARK_ERROR REJECTION_MESSAGE(F("header mark"));
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#define HEADER_SPACE_ERROR REJECTION_MESSAGE(F("header space"));
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#define DATA_MARK_ERROR REJECTION_MESSAGE(F("data mark"));
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#define DATA_SPACE_ERROR REJECTION_MESSAGE(F("data space"));
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#define TRAILER_BIT_ERROR REJECTION_MESSAGE(F("RC5/RC6 trailer bit length"));
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#else
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#define ATTEMPT_MESSAGE(s)
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#define REJECTION_MESSAGE(s) false
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#define RAW_COUNT_ERROR false
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#define HEADER_MARK_ERROR false
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#define HEADER_SPACE_ERROR false
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#define DATA_MARK_ERROR false
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#define DATA_SPACE_ERROR false
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#define TRAILER_BIT_ERROR false
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#endif
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#endif //IRLibMatch_h
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