osd-contiki/platform/esb/dev/irq.c

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2010-01-14 18:39:35 +01:00
/*
* Copyright (c) 2009, Swedish Institute of Computer Science
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
* @(#)$Id: irq.c,v 1.4 2010/01/14 17:39:35 nifi Exp $
*/
#include "lib/sensors.h"
#include "dev/irq.h"
#include "dev/lpm.h"
#include <signal.h>
#define ADC12MCTL_NO(adcno) ((unsigned char *) ADC12MCTL0_)[adcno]
static int (* adc12_irq[8])(void);
static int (* port1_irq[8])(void);
static unsigned char adcflags;
/*---------------------------------------------------------------------------*/
interrupt(PORT1_VECTOR)
irq_p1(void)
{
int i;
ENERGEST_ON(ENERGEST_TYPE_IRQ);
for(i = 0; i < 8; i++) {
if((P1IFG & (1 << i)) && port1_irq[i] != NULL) {
if((port1_irq[i])()) {
LPM4_EXIT;
}
}
}
P1IFG = 0x00;
ENERGEST_OFF(ENERGEST_TYPE_IRQ);
}
/*---------------------------------------------------------------------------*/
interrupt (ADC_VECTOR)
irq_adc(void)
{
int i;
ENERGEST_ON(ENERGEST_TYPE_IRQ);
for(i = 0; i < 8; i++) {
if(adc12_irq[i] != NULL) {
if((adc12_irq[i])()) {
LPM4_EXIT;
}
}
}
ENERGEST_OFF(ENERGEST_TYPE_IRQ);
}
/*---------------------------------------------------------------------------*/
void
irq_init(void)
{
int i;
adcflags = 0;
for(i = 0; i < 8; i++) {
adc12_irq[i] = NULL;
port1_irq[i] = NULL;
}
/* Setup ADC12, ref., sampling time */
ADC12CTL0 = REF2_5V | SHT0_10 | SHT1_10 | MSC;
/* Use sampling timer, repeat-sequence-of-channels */
/* ADC12CTL1 = SHP | CONSEQ_3 | ADC12DIV_3; */
ADC12CTL1 = SHP | CONSEQ_3 | ADC12DIV_7;
}
/*---------------------------------------------------------------------------*/
void
irq_port1_activate(unsigned char irqno, int (* irq)(void))
{
if(irqno < 8) {
port1_irq[irqno] = irq;
}
}
/*---------------------------------------------------------------------------*/
void
irq_port1_deactivate(unsigned char irqno)
{
if(irqno < 8) {
port1_irq[irqno] = NULL;
}
}
/*---------------------------------------------------------------------------*/
/* Set lowest ADC to be start in sequence and highest to be interrupt
enabled and set end-of-sequence on the highest active ADC */
static void
sethilo(void)
{
int c;
/* Clear start of sequence */
ADC12CTL1 &= ~(CSTARTADD_15);
/* Set new start of sequence to lowest active memory holder */
for(c = 0; c < 8; c++) {
if(adcflags & (1 << c)) {
ADC12CTL1 |= (c * CSTARTADD_1);
break;
}
}
/* Clear all interrupts and end-of-sequences */
ADC12IE = 0;
for(c = 0; c < 8; c++) {
ADC12MCTL_NO(c) &= ~EOS;
}
/* Set highest interrupt and end-of-sequence. This will generate one
interrupt for each sequence of conversions. */
for(c = 0; c < 8; c++) {
if(adcflags & (128 >> c)) {
ADC12IE |= 128 >> c;
ADC12MCTL_NO(7 - c) |= EOS;
break;
}
}
}
/*---------------------------------------------------------------------------*/
void
irq_adc12_activate(unsigned char adcno, unsigned char config,
int (* irq)(void))
{
if(adcno >= 8) {
return;
}
/* stop converting */
ADC12CTL0 &= ~ENC;
/* wait for conversion to stop */
while(ADC12CTL0 & ADC12BUSY);
ADC12CTL0 &= ~(ADC12ON | REFON);
ADC12IE = 0;
/* clear any pending interrupts */
ADC12IFG = 0;
adcflags |= (1 << adcno);
ADC12MCTL_NO(adcno) = config;
sethilo();
ADC12CTL0 |= ADC12ON | REFON;
adc12_irq[adcno] = irq;
/* Delay */
clock_delay(20000);
ADC12CTL0 |= ENC | ADC12SC;
}
/*---------------------------------------------------------------------------*/
void
irq_adc12_deactivate(unsigned char adcno)
{
if(adcno >= 8) {
return;
}
/* stop converting */
ADC12CTL0 &= ~ENC;
/* wait for conversion to stop */
while(ADC12CTL0 & ADC12BUSY);
ADC12CTL0 &= ~(ADC12ON | REFON);
ADC12IE = 0;
/* clear any pending interrupts */
ADC12IFG = 0;
adcflags &= ~(1 << adcno);
ADC12MCTL_NO(adcno) = 0;
sethilo();
adc12_irq[adcno] = NULL;
if(adcflags) {
/* Turn on the ADC12 */
ADC12CTL0 |= (ADC12ON | REFON);
/* Delay */
clock_delay(20000);
/* Still active. Turn on the conversion. */
ADC12CTL0 |= ENC | ADC12SC;
}
}
/*---------------------------------------------------------------------------*/
int
irq_adc12_active(unsigned char adcno)
{
return adcflags & (1 << adcno) ? 1 : 0;
}
/*---------------------------------------------------------------------------*/