247 lines
7 KiB
C
247 lines
7 KiB
C
/*
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* Copyright (c) 2010, Loughborough University - 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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/**
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* \file
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* This file handles the sensor readings and float conversions
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* for sensors-example. We keep this separate in order to place it
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* to a higher BANK.
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*
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* Bankable
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*
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* \author
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* George Oikonomou - <oikonomou@users.sourceforge.net>
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*/
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#include "contiki-conf.h"
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#include "uip.h" /* for htons / htonl */
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#include "dev/leds.h"
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#if CONTIKI_TARGET_SENSINODE
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#include "dev/sensinode-sensors.h"
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#include "sensinode-debug.h"
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#endif
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#define DEBUG 0
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#if DEBUG
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#define PRINTF(...) printf(__VA_ARGS__)
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#else
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#define PRINTF(...)
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#endif
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#include <stdio.h>
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#include <ctype.h>
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#define SENSOR_OK 0
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#define SENSOR_ADC_OFF -1
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#define SENSOR_UNKNOWN -2
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/* Request Bits */
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#define REQUEST_BIT_P0_GET 0x0400
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#define REQUEST_BIT_L2_SET 0x0200
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#define REQUEST_BIT_L1_SET 0x0100
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#define REQUEST_BIT_LED_GET 0x0080
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#define REQUEST_BIT_ACC 0x0040
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#define REQUEST_BIT_BAT 0x0020
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#define REQUEST_BIT_VDD 0x0010
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#define REQUEST_BIT_TEMP 0x0008
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#define REQUEST_BIT_LIGHT 0x0004
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#define REQUEST_BIT_UPTIME 0x0002
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#define REQUEST_BIT_CHIPID 0x0001
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/*---------------------------------------------------------------------------*/
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int8_t
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read_sensor(char * rs)
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{
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/* Sensor Values */
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static int rv;
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static struct sensors_sensor * sensor;
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/* Those 3 variables are only used for debugging */
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#if DEBUG
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static float sane = 0;
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static int dec;
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static float frac;
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#endif
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uint16_t r;
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uint8_t len = 0;
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sensor = sensors_find(ADC_SENSOR);
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if (!sensor) {
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PRINTF("ADC not found\n");
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return (SENSOR_ADC_OFF);
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}
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/* Fetch the request bytes */
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memcpy(&r, rs, 2);
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r = uip_ntohs(r);
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PRINTF("R=%u\n", r);
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if (r & REQUEST_BIT_CHIPID) {
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uint8_t chipid = CHIPID;
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memcpy(rs + len, &chipid, sizeof(chipid));
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len += sizeof(chipid);
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PRINTF("ChipID=0x%02x\n", chipid);
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}
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if (r & REQUEST_BIT_UPTIME) {
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/* Uptime */
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unsigned long l;
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l = uip_htonl(clock_seconds());
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memcpy(rs + len, &l, sizeof(l));
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len += sizeof(l);
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PRINTF("Uptime=%lu secs\n", uip_ntohl(l));
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}
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if (r & REQUEST_BIT_LIGHT) {
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rv = sensor->value(ADC_SENSOR_TYPE_LIGHT);
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if(rv != -1) {
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#if DEBUG
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sane = (float)(rv * 0.4071);
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dec = sane;
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frac = sane - dec;
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PRINTF(" Light=%d.%02ulux (%d)\n", dec, (unsigned int)(frac*100), rv);
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#endif
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memcpy(rs + len, &rv, sizeof(rv));
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len += sizeof(rv);
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}
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}
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if (r & REQUEST_BIT_TEMP) {
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rv = sensor->value(ADC_SENSOR_TYPE_TEMP);
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if(rv != -1) {
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#if DEBUG
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sane = ((rv * 0.61065 - 773) / 2.45);
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dec = sane;
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frac = sane - dec;
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PRINTF(" Temp=%d.%02u C (%d)\n", dec, (unsigned int)(frac*100), rv);
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#endif
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memcpy(rs + len, &rv, sizeof(rv));
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len += sizeof(rv);
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}
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}
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if (r & (REQUEST_BIT_VDD | REQUEST_BIT_BAT)) {
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/* We want VDD for both cases */
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rv = sensor->value(ADC_SENSOR_TYPE_VDD);
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if(rv != -1) {
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#if DEBUG
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sane = rv * 3.75 / 2047;
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dec = sane;
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frac = sane - dec;
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PRINTF("Supply=%d.%02uV (%d)\n", dec, (unsigned int)(frac*100), rv);
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/* Store rv temporarily in dec so we can use it for the battery */
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dec = rv;
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#endif
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memcpy(rs + len, &rv, sizeof(rv));
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len += sizeof(rv);
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}
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/* And then carry on with battery if needed */
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if (r & REQUEST_BIT_BAT) {
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rv = sensor->value(ADC_SENSOR_TYPE_BATTERY);
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if(rv != -1) {
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#if DEBUG
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sane = (11.25 * rv * dec) / (0x7FE002);
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dec = sane;
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frac = sane - dec;
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PRINTF(" Batt.=%d.%02uV (%d)\n", dec, (unsigned int)(frac*100), rv);
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#endif
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memcpy(rs + len, &rv, sizeof(rv));
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len += sizeof(rv);
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}
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}
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}
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if (r & REQUEST_BIT_ACC) {
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rv = sensor->value(ADC_SENSOR_TYPE_ACC_X);
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if(rv != -1) {
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#if DEBUG
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sane = ((rv * 3.75 / 2047) - 1.65) / 0.44;
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dec = sane;
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frac = sane - dec;
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frac = (frac < 0) ? -frac : frac;
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PRINTF(" AccX=");
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if(sane < 0 && dec == 0) {
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PRINTF('-');
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}
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PRINTF("%d.%02ug (%d)\n", dec, (unsigned int)(frac*100), rv);
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#endif
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memcpy(rs + len, &rv, sizeof(rv));
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len += sizeof(rv);
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}
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rv = sensor->value(ADC_SENSOR_TYPE_ACC_Y);
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if(rv != -1) {
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#if DEBUG
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sane = ((rv * 3.75 / 2047) - 1.65) / 0.44;
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dec = sane;
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frac = sane - dec;
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frac = (frac < 0) ? -frac : frac;
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PRINTF(" AccY=");
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if(sane < 0 && dec == 0) {
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PRINTF('-');
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}
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PRINTF("%d.%02ug (%d)\n", dec, (unsigned int)(frac*100), rv);
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#endif
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memcpy(rs + len, &rv, sizeof(rv));
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len += sizeof(rv);
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}
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rv = sensor->value(ADC_SENSOR_TYPE_ACC_Z);
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if(rv != -1) {
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#if DEBUG
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sane = ((rv * 3.75 / 2047) - 1.65) / 0.44;
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dec = sane;
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frac = sane - dec;
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frac = (frac < 0) ? -frac : frac;
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PRINTF(" AccZ=");
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if(sane < 0 && dec == 0) {
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PRINTF('-');
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}
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PRINTF("%d.%02ug (%d)\n", dec, (unsigned int)(frac*100), rv);
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#endif
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memcpy(rs + len, &rv, sizeof(rv));
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len += sizeof(rv);
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}
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}
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if (r & REQUEST_BIT_L1_SET) {
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leds_toggle(LEDS_GREEN);
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}
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if (r & REQUEST_BIT_L2_SET) {
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leds_toggle(LEDS_RED);
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}
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if (r & REQUEST_BIT_LED_GET) {
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uint8_t leds = leds_get();
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memcpy(rs + len, &leds, sizeof(leds));
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len += sizeof(leds);
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PRINTF(" LED 2=%u\n", leds);
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}
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if (r & REQUEST_BIT_P0_GET) {
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uint8_t p0 = P0_3;
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memcpy(rs + len, &p0, sizeof(p0));
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len += sizeof(p0);
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}
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return len;
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}
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