Low Power Sensing Application initial checkin

[tinyos-2.x.git] / apps / tutorials / LowPowerSensing / sampleLog / PeriodicSampleLoggerP.nc

diff --git a/apps/tutorials/LowPowerSensing/sampleLog/PeriodicSampleLoggerP.nc b/apps/tutorials/LowPowerSensing/sampleLog/PeriodicSampleLoggerP.nc
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+/*
+ * Copyright (c) 2007 Stanford University.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - 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.
+ * - Neither the name of the Stanford University 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 COPYRIGHT HOLDERS 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 STANFORD
+ * UNIVERSITY OR ITS 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.
+ */
+
+/**
+ * @author Kevin Klues <klueska@cs.stanford.edu>
+ * @date July 24, 2007
+ */
+
+generic module PeriodicSampleLoggerP(uint32_t period_ms, 
+                                     uint8_t num_sensors, 
+                                     typedef sensor_type_t) {
+  uses {
+    interface Boot;
+    interface Read<sensor_type_t> as Sensor[uint8_t];
+    interface Timer<TMilli> as Timer;
+    interface LogWrite;
+    interface Leds;
+  }
+}
+implementation {
+  #include "GenericSensorSample.h"
+
+  generic_sensor_sample_t sample[2];
+  generic_sensor_sample_t* current_sample;
+  uint8_t current_sample_id;
+
+  task void eraseTask();
+  task void appendTask();
+
+  void readSensors() {
+    int i;
+    for(i=0; i<num_sensors; i++)
+      call Sensor.read[i]();
+  }
+
+  void appendSample(generic_sensor_sample_t* s) {
+    //printf("WRITE LOC: %d\n", call LogWrite.currentOffset());
+    if(call LogWrite.append(s, sizeof(generic_sensor_sample_t)) != SUCCESS)
+      post appendTask();
+  }
+
+  task void eraseTask() {
+    if(call LogWrite.erase() != SUCCESS)
+      post eraseTask();
+  }
+
+  task void appendTask() {
+    appendSample(&(sample[!current_sample_id]));
+  }
+
+  event void Boot.booted() {
+    if(call LogWrite.erase() != SUCCESS)
+      post eraseTask();
+  }
+
+  event void LogWrite.eraseDone(error_t error) {
+    sample[0].sample_num = 0;
+    sample[1].sample_num = 1;
+    current_sample_id = 0;
+    current_sample = &(sample[current_sample_id]);
+    readSensors();
+    call Timer.startPeriodic(period_ms);
+  }
+
+  event void Timer.fired() {
+    call Leds.led0Toggle();
+    appendSample(current_sample);
+    current_sample_id = !current_sample_id;
+    current_sample = &(sample[current_sample_id]);
+    readSensors();
+  }
+
+  event void Sensor.readDone[uint8_t i](error_t result, sensor_type_t val) {
+    if(result == SUCCESS) {
+      current_sample->values[i] = val;
+      call Leds.led1Toggle();
+    }
+    else {
+      current_sample->values[i] = ((generic_sensor_sample_type_union_t)(0xFFFFFFFF)).st;
+      call Leds.led2Toggle();
+    }
+  }
+
+  event void LogWrite.appendDone(void* buf, storage_len_t len, bool recordsLost, error_t error){
+    if(error != SUCCESS)
+      post appendTask();
+    else ((generic_sensor_sample_t*)buf)->sample_num+=2;
+  }
+  event void LogWrite.syncDone(error_t error) {}
+  default command error_t Sensor.read[uint8_t i]() {return SUCCESS;}
+}
+