168 lines
4.8 KiB
C
168 lines
4.8 KiB
C
/*
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* Copyright (c) 2005, Swedish Institute of Computer Science
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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* @(#)$Id: sound-sensor.c,v 1.5 2010/02/08 00:00:45 nifi Exp $
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*/
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#include <stdlib.h>
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#include "dev/sound-sensor.h"
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#include "dev/irq.h"
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#define MIC_MIN_SENS 150
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#define SAMPLE 1
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const struct sensors_sensor sound_sensor;
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static unsigned int sound, micdiff, micmax, avgmax;
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static int8_t mode;
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static int8_t sample_div;
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static int8_t ctr;
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static int16_t *sample_buffer;
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static int buffer_size;
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static int buf_pos;
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/*---------------------------------------------------------------------------*/
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static int
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irq(void)
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{
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micdiff = micdiff + abs(ADC12MEM4 - sound) - (micdiff >> 3);
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sound = ADC12MEM4;
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if(mode == SAMPLE) {
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ctr++;
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if(ctr >= sample_div) {
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ctr = 0;
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sample_buffer[buf_pos++] = sound;
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if(buf_pos >= buffer_size) {
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mode = 0;
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sensors_changed(&sound_sensor);
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return 1;
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}
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}
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}
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/* if(micdiff > MIC_MIN_SENS) { */
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/* sensors_changed(&sound_sensor); */
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/* } */
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/* if(micdiff > (avgmax >> 2)) { */
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/* if(micdiff % 10 == 0) beep_beep(10); */
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/* // Subtract a little... */
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/* micdiff = micdiff - (micdiff >> 4); */
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/* } */
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/* if(micmax < micdiff) { */
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/* micmax = micdiff; */
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/* } */
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/* if(micdiff > 2000) { */
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/* leds_on(LEDS_GREEN); */
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/* } */
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/* if(micdiff > 3000) { */
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/* leds_on(LEDS_YELLOW); */
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/* } */
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/* if(micdiff > 4000) { */
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/* leds_on(LEDS_RED); */
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/* } */
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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static int
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value(int type)
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{
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/* try returning the max to see what values we get... */
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/* int mictmp = micmax; */
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/* avgmax = avgmax + micmax - (avgmax >> 3); */
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/* micmax = micdiff; */
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/* return mictmp; */
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return micdiff;
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}
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/*---------------------------------------------------------------------------*/
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static int
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configure(int type, int value)
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{
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switch(type) {
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case SENSORS_HW_INIT:
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/* Initialization of ADC12 done by irq */
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mode = 0;
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buffer_size = 0;
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return 1;
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case SENSORS_ACTIVE:
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if(value) {
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if(!irq_adc12_active(4)) {
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sound = micdiff = micmax = 0;
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mode = 0;
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ctr = 0;
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sample_div = 0;
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buf_pos = 0;
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avgmax = 5000;
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irq_adc12_activate(4, (INCH_0 + SREF_0), irq);
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}
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} else {
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irq_adc12_deactivate(4);
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}
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return 1;
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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static int
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status(int type)
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{
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switch(type) {
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case SENSORS_ACTIVE:
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return irq_adc12_active(4);
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case SENSORS_READY:
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return (mode != SAMPLE) && irq_adc12_active(4);
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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void
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sound_sensor_start_sample(void)
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{
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if(buffer_size > 0) {
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buf_pos = 0;
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ctr = 0;
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mode = SAMPLE;
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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sound_sensor_set_buffer(int16_t *buffer, int buf_size, int divider)
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{
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sample_buffer = buffer;
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buffer_size = buf_size;
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sample_div = divider;
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}
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/*---------------------------------------------------------------------------*/
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SENSORS_SENSOR(sound_sensor, SOUND_SENSOR,
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value, configure, status);
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