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Interrupt arbitration for sensor drivers

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adamdunkels 2007-03-15 21:37:01 +00:00
parent ab4cc60e57
commit 574becc10e
2 changed files with 232 additions and 0 deletions
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188
cpu/msp430/dev/irq.c Normal file
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/*
* Copyright (c) 2005, 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 1.1 2007/03/15 21:37:01 adamdunkels Exp $
*/
#include "lib/sensors.h"
#include "dev/irq.h"
#include "dev/lpm.h"
/*#include "contiki-esb.h"*/
#include <signal.h>
#define ADC12MCTL_NO(adcno) ((unsigned char *) ADC12MCTL0_)[adcno]
static unsigned char adcflags;
/*---------------------------------------------------------------------------*/
#if IRQ_PORT1_VECTOR
interrupt(PORT1_VECTOR)
irq_p1(void)
{
if(sensors_handle_irq(IRQ_PORT1)) {
LPM_AWAKE();
}
P1IFG = 0x00;
}
#endif
/*---------------------------------------------------------------------------*/
interrupt(PORT2_VECTOR)
irq_p2(void)
{
if(sensors_handle_irq(IRQ_PORT2)) {
LPM_AWAKE();
}
P2IFG = 0x00;
}
/*---------------------------------------------------------------------------*/
interrupt (ADC_VECTOR)
irq_adc(void)
{
if(sensors_handle_irq(IRQ_ADC)) {
LPM_AWAKE();
}
}
/*---------------------------------------------------------------------------*/
void
irq_init(void)
{
adcflags = 0;
/* 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;
}
/*---------------------------------------------------------------------------*/
/* 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(const struct sensors_sensor *sensor,
unsigned char adcno, unsigned char config)
{
/* 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;
sensors_add_irq(sensor, IRQ_ADC);
/* Delay */
clock_delay(20000);
ADC12CTL0 |= ENC | ADC12SC;
}
/*---------------------------------------------------------------------------*/
void
irq_adc12_deactivate(const struct sensors_sensor *sensor, unsigned char adcno)
{
/* 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();
sensors_remove_irq(sensor, IRQ_ADC);
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;
}
/*---------------------------------------------------------------------------*/

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cpu/msp430/dev/irq.h Normal file
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/*
* Copyright (c) 2005, 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.h,v 1.1 2007/03/15 21:37:01 adamdunkels Exp $
*/
#ifndef __IRQ_H__
#define __IRQ_H__
void irq_adc12_activate(const struct sensors_sensor *sensor,
unsigned char adcno, unsigned char config);
void irq_adc12_deactivate(const struct sensors_sensor *sensor,
unsigned char adcno);
int irq_adc12_active(unsigned char adcno);
#endif /* __IRQ_H__ */