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/*
************************************************************************
* WInterrupts.c
*
* Arduino core files for MSP430
* Copyright (c) 2012 Robert Wessels. All right reserved.
*
*
***********************************************************************
Derived from:
WInterrupts.c 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
Modified 1 August 2010 by Mark Sproul
*/
#include <inttypes.h>
#include <stdio.h>
#include "wiring_private.h"
#ifndef BV
#define BV(x) (1 << (x))
#endif
#define bit_pos(A) ((A) == 1u << 0 ? 0 \
: (A) == 1u << 1 ? 1 \
: (A) == 1u << 2 ? 2 \
: (A) == 1u << 3 ? 3 \
: (A) == 1u << 4 ? 4 \
: (A) == 1u << 5 ? 5 \
: (A) == 1u << 6 ? 6 \
: (A) == 1u << 7 ? 7 \
: 0)
#define NUM_INTS_PER_PORT 8
static volatile voidFuncPtr intFuncP1[NUM_INTS_PER_PORT];
#if defined(__MSP430_HAS_PORT2_R__)
static volatile voidFuncPtr intFuncP2[NUM_INTS_PER_PORT];
#endif
void attachInterrupt(uint8_t interruptNum, void (*userFunc)(void), int mode) {
uint8_t bit = digitalPinToBitMask(interruptNum);
uint8_t port = digitalPinToPort(interruptNum);
if ((port == NOT_A_PIN) || !((mode == FALLING) || (mode == RISING))) return;
__dint();
switch(port) {
case P1:
P1IE |= bit;
P1IFG &= ~bit;
P1IES = mode ? P1IES | bit : P1IES & ~bit;
intFuncP1[bit_pos(bit)] = userFunc;
break;
#if defined(__MSP430_HAS_PORT2_R__)
case P2:
P2IE |= bit;
P2IFG &= ~bit;
P2IES = mode ? P2IES | bit : P2IES & ~bit;
intFuncP2[bit_pos(bit)] = userFunc;
break;
#endif
default:
break;
}
__eint();
}
void detachInterrupt(uint8_t interruptNum) {
uint8_t bit = digitalPinToBitMask(interruptNum);
uint8_t port = digitalPinToPort(interruptNum);
if (port == NOT_A_PIN) return;
switch(port) {
case P1:
P1IE &= ~bit;
intFuncP1[bit_pos(bit)] = 0;
break;
#if defined(__MSP430_HAS_PORT2_R__)
case P2:
P2IE &= ~bit;
intFuncP2[bit_pos(bit)] = 0;
break;
#endif
default:
break;
}
}
__attribute__((interrupt(PORT1_VECTOR)))
void Port_1(void)
{
uint8_t i;
for(i = 0; i < 8; i++) {
if((P1IFG & BV(i)) && intFuncP1[i]) {
intFuncP1[i]();
P1IFG &= ~BV(i);
}
}
}
#if defined(__MSP430_HAS_PORT2_R__)
__attribute__((interrupt(PORT2_VECTOR)))
void Port_2(void)
{
uint8_t i;
for(i = 0; i < 8; i++) {
if((P2IFG & BV(i)) && intFuncP2[i]) {
intFuncP2[i]();
P2IFG &= ~BV(i);
}
}
}
#endif
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