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/* -*- mode: jde; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
Part of the Wiring project - http://wiring.uniandes.edu.co
Copyright (c) 2004-05 Hernando Barragan
This library 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 2.1 of the License, or (at your option) any later version.
This library 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 this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330,
Boston, MA 02111-1307 USA
Modified 24 November 2006 by David A. Mellis
*/
#include <inttypes.h>
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/pgmspace.h>
#include <stdio.h>
#include "WConstants.h"
#include "wiring_private.h"
volatile static voidFuncPtr intFunc[EXTERNAL_NUM_INTERRUPTS];
// volatile static voidFuncPtr twiIntFunc;
#if defined(__AVR_ATmega8__)
#define EICRA MCUCR
#define EIMSK GICR
#endif
void attachInterrupt(uint8_t interruptNum, void (*userFunc)(void), int mode) {
if(interruptNum < EXTERNAL_NUM_INTERRUPTS) {
intFunc[interruptNum] = userFunc;
// Configure the interrupt mode (trigger on low input, any change, rising
// edge, or falling edge). The mode constants were chosen to correspond
// to the configuration bits in the hardware register, so we simply shift
// the mode into place.
// Enable the interrupt.
switch (interruptNum) {
#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
case 2:
EICRA = (EICRA & ~((1 << ISC00) | (1 << ISC01))) | (mode << ISC00);
EIMSK |= (1 << INT0);
break;
case 3:
EICRA = (EICRA & ~((1 << ISC10) | (1 << ISC11))) | (mode << ISC10);
EIMSK |= (1 << INT1);
break;
case 4:
EICRA = (EICRA & ~((1 << ISC20) | (1 << ISC21))) | (mode << ISC20);
EIMSK |= (1 << INT2);
break;
case 5:
EICRA = (EICRA & ~((1 << ISC30) | (1 << ISC31))) | (mode << ISC30);
EIMSK |= (1 << INT3);
break;
case 0:
EICRB = (EICRB & ~((1 << ISC40) | (1 << ISC41))) | (mode << ISC40);
EIMSK |= (1 << INT4);
break;
case 1:
EICRB = (EICRB & ~((1 << ISC50) | (1 << ISC51))) | (mode << ISC50);
EIMSK |= (1 << INT5);
break;
case 6:
EICRB = (EICRB & ~((1 << ISC60) | (1 << ISC61))) | (mode << ISC60);
EIMSK |= (1 << INT6);
break;
case 7:
EICRB = (EICRB & ~((1 << ISC70) | (1 << ISC71))) | (mode << ISC70);
EIMSK |= (1 << INT7);
break;
#else
case 0:
EICRA = (EICRA & ~((1 << ISC00) | (1 << ISC01))) | (mode << ISC00);
EIMSK |= (1 << INT0);
break;
case 1:
EICRA = (EICRA & ~((1 << ISC10) | (1 << ISC11))) | (mode << ISC10);
EIMSK |= (1 << INT1);
break;
#endif
}
}
}
void detachInterrupt(uint8_t interruptNum) {
if(interruptNum < EXTERNAL_NUM_INTERRUPTS) {
// Disable the interrupt. (We can't assume that interruptNum is equal
// to the number of the EIMSK bit to clear, as this isn't true on the
// ATmega8. There, INT0 is 6 and INT1 is 7.)
switch (interruptNum) {
#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
case 2:
EIMSK &= ~(1 << INT0);
break;
case 3:
EIMSK &= ~(1 << INT1);
break;
case 4:
EIMSK &= ~(1 << INT2);
break;
case 5:
EIMSK &= ~(1 << INT3);
break;
case 0:
EIMSK &= ~(1 << INT4);
break;
case 1:
EIMSK &= ~(1 << INT5);
break;
case 6:
EIMSK &= ~(1 << INT6);
break;
case 7:
EIMSK &= ~(1 << INT7);
break;
#else
case 0:
EIMSK &= ~(1 << INT0);
break;
case 1:
EIMSK &= ~(1 << INT1);
break;
#endif
}
intFunc[interruptNum] = 0;
}
}
/*
void attachInterruptTwi(void (*userFunc)(void) ) {
twiIntFunc = userFunc;
}
*/
#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
SIGNAL(INT0_vect) {
if(intFunc[EXTERNAL_INT_2])
intFunc[EXTERNAL_INT_2]();
}
SIGNAL(INT1_vect) {
if(intFunc[EXTERNAL_INT_3])
intFunc[EXTERNAL_INT_3]();
}
SIGNAL(INT2_vect) {
if(intFunc[EXTERNAL_INT_4])
intFunc[EXTERNAL_INT_4]();
}
SIGNAL(INT3_vect) {
if(intFunc[EXTERNAL_INT_5])
intFunc[EXTERNAL_INT_5]();
}
SIGNAL(INT4_vect) {
if(intFunc[EXTERNAL_INT_0])
intFunc[EXTERNAL_INT_0]();
}
SIGNAL(INT5_vect) {
if(intFunc[EXTERNAL_INT_1])
intFunc[EXTERNAL_INT_1]();
}
SIGNAL(INT6_vect) {
if(intFunc[EXTERNAL_INT_6])
intFunc[EXTERNAL_INT_6]();
}
SIGNAL(INT7_vect) {
if(intFunc[EXTERNAL_INT_7])
intFunc[EXTERNAL_INT_7]();
}
#else
SIGNAL(INT0_vect) {
if(intFunc[EXTERNAL_INT_0])
intFunc[EXTERNAL_INT_0]();
}
SIGNAL(INT1_vect) {
if(intFunc[EXTERNAL_INT_1])
intFunc[EXTERNAL_INT_1]();
}
#endif
/*
SIGNAL(SIG_2WIRE_SERIAL) {
if(twiIntFunc)
twiIntFunc();
}
*/
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