167 lines
4.8 KiB
C
167 lines
4.8 KiB
C
/*
|
|
* 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: sound-sensor.c,v 1.4 2010/01/14 17:39:35 nifi Exp $
|
|
*/
|
|
#include <stdlib.h>
|
|
#include "dev/sound-sensor.h"
|
|
#include "dev/irq.h"
|
|
|
|
#define MIC_MIN_SENS 150
|
|
#define SAMPLE 1
|
|
|
|
const struct sensors_sensor sound_sensor;
|
|
|
|
static unsigned int sound, micdiff, micmax, avgmax;
|
|
static int8_t mode;
|
|
static int8_t sample_div;
|
|
static int8_t ctr;
|
|
static int16_t *sample_buffer;
|
|
static int buffer_size;
|
|
static int buf_pos;
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
irq(void)
|
|
{
|
|
micdiff = micdiff + abs(ADC12MEM4 - sound) - (micdiff >> 3);
|
|
sound = ADC12MEM4;
|
|
|
|
if(mode == SAMPLE) {
|
|
ctr++;
|
|
if(ctr >= sample_div) {
|
|
ctr = 0;
|
|
sample_buffer[buf_pos++] = sound;
|
|
if(buf_pos >= buffer_size) {
|
|
mode = 0;
|
|
sensors_changed(&sound_sensor);
|
|
return 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* if (micdiff > MIC_MIN_SENS) { */
|
|
/* sensors_changed(&sound_sensor); */
|
|
/* } */
|
|
|
|
/* if (micdiff > (avgmax >> 2)) { */
|
|
/* if (micdiff % 10 == 0) beep_beep(10); */
|
|
/* // Subtract a little... */
|
|
/* micdiff = micdiff - (micdiff >> 4); */
|
|
/* } */
|
|
|
|
/* if (micmax < micdiff) { */
|
|
/* micmax = micdiff; */
|
|
/* } */
|
|
|
|
/* if (micdiff > 2000) { */
|
|
/* leds_on(LEDS_GREEN); */
|
|
/* } */
|
|
/* if (micdiff > 3000) { */
|
|
/* leds_on(LEDS_YELLOW); */
|
|
/* } */
|
|
/* if (micdiff > 4000) { */
|
|
/* leds_on(LEDS_RED); */
|
|
/* } */
|
|
|
|
return 0;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
value(int type)
|
|
{
|
|
/* try returning the max to see what values we get... */
|
|
/* int mictmp = micmax; */
|
|
/* avgmax = avgmax + micmax - (avgmax >> 3); */
|
|
/* micmax = micdiff; */
|
|
/* return mictmp; */
|
|
return micdiff;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
configure(int type, int value)
|
|
{
|
|
switch (type) {
|
|
case SENSORS_HW_INIT:
|
|
/* Initialization of ADC12 done by irq */
|
|
mode = 0;
|
|
buffer_size = 0;
|
|
return 1;
|
|
case SENSORS_ACTIVE:
|
|
if (value) {
|
|
if(!irq_adc12_active(4)) {
|
|
sound = micdiff = micmax = 0;
|
|
mode = 0;
|
|
ctr = 0;
|
|
sample_div = 0;
|
|
buf_pos = 0;
|
|
avgmax = 5000;
|
|
irq_adc12_activate(4, (INCH_0 + SREF_0), irq);
|
|
}
|
|
} else {
|
|
irq_adc12_deactivate(4);
|
|
}
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
status(int type)
|
|
{
|
|
switch (type) {
|
|
case SENSORS_ACTIVE:
|
|
return irq_adc12_active(4);
|
|
case SENSORS_READY:
|
|
return (mode != SAMPLE) && irq_adc12_active(4);
|
|
}
|
|
return 0;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
sound_sensor_start_sample(void)
|
|
{
|
|
if(buffer_size > 0) {
|
|
buf_pos = 0;
|
|
ctr = 0;
|
|
mode = SAMPLE;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
sound_sensor_set_buffer(int16_t *buffer, int buf_size, int divider)
|
|
{
|
|
sample_buffer = buffer;
|
|
buffer_size = buf_size;
|
|
sample_div = divider;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
SENSORS_SENSOR(sound_sensor, SOUND_SENSOR,
|
|
value, configure, status);
|