From 574becc10eb934c9e1494b116b33cdfccf375b98 Mon Sep 17 00:00:00 2001 From: adamdunkels Date: Thu, 15 Mar 2007 21:37:01 +0000 Subject: [PATCH] Interrupt arbitration for sensor drivers --- cpu/msp430/dev/irq.c | 188 +++++++++++++++++++++++++++++++++++++++++++ cpu/msp430/dev/irq.h | 44 ++++++++++ 2 files changed, 232 insertions(+) create mode 100644 cpu/msp430/dev/irq.c create mode 100644 cpu/msp430/dev/irq.h diff --git a/cpu/msp430/dev/irq.c b/cpu/msp430/dev/irq.c new file mode 100644 index 000000000..36a5e9f0c --- /dev/null +++ b/cpu/msp430/dev/irq.c @@ -0,0 +1,188 @@ +/* + * 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 + +#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; +} +/*---------------------------------------------------------------------------*/ diff --git a/cpu/msp430/dev/irq.h b/cpu/msp430/dev/irq.h new file mode 100644 index 000000000..e090c5264 --- /dev/null +++ b/cpu/msp430/dev/irq.h @@ -0,0 +1,44 @@ +/* + * 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__ */