2011-01-17 11:58:04 +01:00
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/*
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* Copyright (c) 2010, Swedish Institute of Computer Science.
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* Copyright (c) 2011, STMicroelectronics.
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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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*/
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/**
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* \file
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* Light and temperature sensor web demo
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*/
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#include "contiki.h"
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#include "httpd-simple.h"
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#include "webserver-nogui.h"
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#include "dev/temperature-sensor.h"
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#include "dev/acc-sensor.h"
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#include "dev/leds.h"
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#include <stdio.h>
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PROCESS(web_sense_process, "Sense Web Demo");
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AUTOSTART_PROCESSES(&web_sense_process);
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#define HISTORY 11
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#define INTERV 5
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static int temperature[HISTORY];
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static int acc_x[HISTORY], acc_y[HISTORY], acc_z[HISTORY];
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static int sensors_pos;
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/*---------------------------------------------------------------------------*/
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static const char *TOP = "<html><head><title>Contiki Web Sense</title></head><body>\n";
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static const char *BOTTOM_HOME = "<br><br><a href=\"0\">Turn off leds</a><br><a href=\"1\">Turn on leds</a></body></html>\n";
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static const char *BOTTOM = "<br><br><a href=\"index\">Home</a></body></html>\n";
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/*---------------------------------------------------------------------------*/
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/* Only one single request at time */
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static char buf[256];
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static int blen;
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#define ADD(...) do { \
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blen += snprintf(&buf[blen], sizeof(buf) - blen, __VA_ARGS__); \
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} while(0)
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static void
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generate_chart(const char *title, const char *unit, int min, int max, int *values)
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{
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int i;
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blen = 0;
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ADD("<h1>%s</h1>\n"
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"<img src=\"http://chart.apis.google.com/chart?"
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"cht=lc&chs=400x300&chxt=x,x,y,y&chxp=1,50|3,50&"
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"chxr=2,%d,%d|0,0,%u&chds=%d,%d&chxl=1:|Time|3:|%s&chd=t:",
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title, min, max, (HISTORY-1)*INTERV, min, max, unit);
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for(i = 0; i < HISTORY; i++) {
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ADD("%s%d", i > 0 ? "," : "", values[(sensors_pos + i) % HISTORY]);
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}
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ADD("\">");
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}
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static void
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start_acc_chart(const char *title, const char *unit, int min, int max)
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{
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blen = 0;
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ADD("<h1>%s</h1>\n"
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"<img src=\"http://chart.apis.google.com/chart?"
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"cht=lc&chs=400x300&chxt=x,x,y,y&chxp=1,50|3,50&"
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"chco=FF0000,008000,224499&"
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"chdl=X|Y|Z&"
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"chxr=2,%d,%d|0,0,%u&chds=%d,%d&chxl=1:|Time|3:|%s&chd=t:",
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title, min, max,(HISTORY-1)*INTERV, min, max, unit);
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}
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static void
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add_chart_values(int *values)
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{
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int i;
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for(i = 0; i < HISTORY; i++) {
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ADD("%s%d", i > 0 ? "," : "", values[(sensors_pos + i) % HISTORY]);
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}
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}
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static void
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end_acc_chart()
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{
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ADD("\">");
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}
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static
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PT_THREAD(send_values(struct httpd_state *s))
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{
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PSOCK_BEGIN(&s->sout);
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SEND_STRING(&s->sout, TOP);
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if(strncmp(s->filename, "/index", 6) == 0 ||
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s->filename[1] == '\0') {
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/* Default page: show latest sensor values as text (does not
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require Internet connection to Google for charts). */
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blen = 0;
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ADD("<h1>Current readings</h1>\n"
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"<a href=\"a\">Acceleration</a>: (%d, %d, %d) mg<br>"
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"<a href=\"t\">Temperature</a>: %u° C",
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acc_sensor.value(ACC_X_AXIS),
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acc_sensor.value(ACC_Y_AXIS),
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acc_sensor.value(ACC_Z_AXIS),
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temperature_sensor.value(0)/10);
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SEND_STRING(&s->sout, buf);
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SEND_STRING(&s->sout, BOTTOM_HOME);
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} else if(s->filename[1] == '0') {
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/* Turn off leds */
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leds_off(LEDS_ALL);
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SEND_STRING(&s->sout, "Turned off leds!");
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SEND_STRING(&s->sout, BOTTOM);
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} else if(s->filename[1] == '1') {
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/* Turn on leds */
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leds_on(LEDS_ALL);
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SEND_STRING(&s->sout, "Turned on leds!");
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SEND_STRING(&s->sout, BOTTOM);
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} else {
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if(s->filename[1] != 't') {
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start_acc_chart("Acceleration", "mg", -1100, 1100);
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SEND_STRING(&s->sout, buf);
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blen=0;
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add_chart_values(acc_x);
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ADD("|");
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SEND_STRING(&s->sout, buf);
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blen=0;
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add_chart_values(acc_y);
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ADD("|");
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SEND_STRING(&s->sout, buf);
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blen=0;
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add_chart_values(acc_z);
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end_acc_chart();
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SEND_STRING(&s->sout, buf);
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}
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if(s->filename[1] != 'a') {
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generate_chart("Temperature", "Celsius", 10, 50, temperature);
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SEND_STRING(&s->sout, buf);
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}
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2011-05-28 11:46:18 +02:00
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SEND_STRING(&s->sout, BOTTOM);
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2011-01-17 11:58:04 +01:00
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}
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PSOCK_END(&s->sout);
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}
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/*---------------------------------------------------------------------------*/
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httpd_simple_script_t
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httpd_simple_get_script(const char *name)
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{
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return send_values;
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}
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(web_sense_process, ev, data)
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{
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static struct etimer timer;
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PROCESS_BEGIN();
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sensors_pos = 0;
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process_start(&webserver_nogui_process, NULL);
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etimer_set(&timer, CLOCK_SECOND * INTERV);
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SENSORS_ACTIVATE(acc_sensor);
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while(1) {
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PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&timer));
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etimer_reset(&timer);
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acc_x[sensors_pos] = acc_sensor.value(ACC_X_AXIS);
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acc_y[sensors_pos] = acc_sensor.value(ACC_Y_AXIS);
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acc_z[sensors_pos] = acc_sensor.value(ACC_Z_AXIS);
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temperature[sensors_pos] = temperature_sensor.value(0)/10;
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sensors_pos = (sensors_pos + 1) % HISTORY;
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}
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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