mirror of https://github.com/noisymime/Arduino.git
70 lines
3.2 KiB
C
Executable File
70 lines
3.2 KiB
C
Executable File
/*
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icrmacros.h
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A place to put useful ICR (interrupt change register) macros
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If you want to support non-Arduino processors you can extend or replace
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this file.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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The latest version of this library can always be found at
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http://arduiniana.org.
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*/
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// Abstractions for maximum portability between processors
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// These are macros to associate pins to pin change interrupts
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#if !defined(digitalPinToPCICR) // Courtesy Paul Stoffregen
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#if defined(__AVR_ATmega168__) || defined(__AVR_ATmega328P__)
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#define digitalPinToPCICR(p) (((p) >= 0 && (p) <= 21) ? (&PCICR) : ((uint8_t *)0))
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#define digitalPinToPCICRbit(p) (((p) <= 7) ? 2 : (((p) <= 13) ? 0 : 1))
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#define digitalPinToPCMSK(p) (((p) <= 7) ? (&PCMSK2) : (((p) <= 13) ? (&PCMSK0) : (((p) <= 21) ? (&PCMSK1) : ((uint8_t *)0))))
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#define digitalPinToPCMSKbit(p) (((p) <= 7) ? (p) : (((p) <= 13) ? ((p) - 8) : ((p) - 14)))
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#elif defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
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// Specifically for the Arduino Mega 2560 (or 1280 on the original Arduino Mega)
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// A majority of the pins are NOT PCINTs, SO BE WARNED (i.e. you cannot use them as receive pins)
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// Only pins available for RECEIVE (TRANSMIT can be on any pin):
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// (I've deliberately left out pin mapping to the Hardware USARTs - seems senseless to me)
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// Pins: 10, 11, 12, 13, 50, 51, 52, 53, 62, 63, 64, 65, 66, 67, 68, 69
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#define digitalPinToPCICR(p) ( (((p) >= 10) && ((p) <= 13)) || \
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(((p) >= 50) && ((p) <= 53)) || \
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(((p) >= 62) && ((p) <= 69)) ? (&PCICR) : ((uint8_t *)0) )
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#define digitalPinToPCICRbit(p) ( (((p) >= 10) && ((p) <= 13)) || (((p) >= 50) && ((p) <= 53)) ? 0 : \
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( (((p) >= 62) && ((p) <= 69)) ? 2 : \
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0 ) )
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#define digitalPinToPCMSK(p) ( (((p) >= 10) && ((p) <= 13)) || (((p) >= 50) && ((p) <= 53)) ? (&PCMSK0) : \
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( (((p) >= 62) && ((p) <= 69)) ? (&PCMSK2) : \
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((uint8_t *)0) ) )
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#define digitalPinToPCMSKbit(p) ( (((p) >= 10) && ((p) <= 13)) ? ((p) - 6) : \
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( ((p) == 50) ? 3 : \
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( ((p) == 51) ? 2 : \
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( ((p) == 52) ? 1 : \
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( ((p) == 53) ? 0 : \
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( (((p) >= 62) && ((p) <= 69)) ? ((p) - 62) : \
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0 ) ) ) ) ) )
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#else
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#error This processor is not supported by SoftwareSerial
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#endif
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#endif
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