added example of ext-sensor for Jcreate

2010-02-13 12:21:31 +00:00 · 2010-02-13 12:21:31 +00:00 · 46c7cd23fc
commit 46c7cd23fc
parent 3a2eec2b1a
1 changed files with 92 additions and 0 deletions
--- a/examples/jcreate/example-ext-sensor.c
+++ b/examples/jcreate/example-ext-sensor.c
@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 2010, 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: example-ext-sensor.c,v 1.1 2010/02/13 12:21:31 joxe Exp $
+ */
+
+/**
+ * \file
+ *         A very simple Contiki application showing how to use ext-sensor
+ *         In this case a i-Snail current sensor for 10A is used to measure
+ *         current.
+ * \author
+ *         Joakim Eriksson <joakime@sics.se>
+ */
+
+#include "contiki.h"
+#include "dev/leds.h"
+#include "dev/ext-sensor.h"
+#include <stdio.h>
+/*---------------------------------------------------------------------------*/
+PROCESS(ext_sensor_process, "ext-sensor process");
+AUTOSTART_PROCESSES(&ext_sensor_process);
+/*---------------------------------------------------------------------------*/
+
+PROCESS_THREAD(ext_sensor_process, ev, data)
+{
+  static struct etimer et;
+  static long maValue;
+  static long maSum;
+  static int time;
+  PROCESS_BEGIN();
+
+  /* The Sentilla JCreate has 8 LEDs, and we need to set the ports
+     correctly. */
+  LEDS_PxDIR = 0xff;
+  LEDS_PxOUT = 0xff;
+  SENSORS_ACTIVATE(ext_sensor);
+
+  leds_invert(LEDS_ALL);
+
+  etimer_set(&et, CLOCK_SECOND);
+  while(1) {
+
+    leds_invert(LEDS_ALL);
+
+    PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
+    etimer_reset(&et);
+
+    leds_invert(LEDS_ALL);
+
+    /* the max value of the i-Snail sensor is 10 Ampere (=> ~5V) */
+    /* and we are using the 2.5 V reference voltage which */
+    /* means that 5 Ampere will make the sensor max-out. */
+    /* => 5 Ampere will be 4095 in the sensor ADC register */
+    maValue = (ext_sensor.value(ADC0) * 5000L) / 4095;
+    maSum += maValue;
+    time++;
+    printf("Measured ext1 %d  %ld mA %ld W  %ld Wh %d (s)\n", 
+	   ext_sensor.value(ADC0), maValue, (maValue * 230L) / 1000,
+	   (maSum * 230L) / (1000L * 60 * 60), time);
+  }
+
+  PROCESS_END();
+}
+/*---------------------------------------------------------------------------*/