May or may not use these

[tinyos-2.x.git] / tos / platforms / tmirws / sensors / AeroVaneP.nc

diff --git a/tos/platforms/tmirws/sensors/AeroVaneP.nc b/tos/platforms/tmirws/sensors/AeroVaneP.nc
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+++ b/tos/platforms/tmirws/sensors/AeroVaneP.nc
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+/*
+ * Copyright (c) 2008, Titanium Mirror, Inc.
+ * 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 Titanium Mirror, Inc. 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 THE COPYRIGHT
+ * OWNER 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.
+ */
+ 
+/**
+ * Aerovane sensor, measuring wind speed and direction
+ * 
+ * @author R. Steve McKown <rsmckown@gmail.com>
+ */
+ 
+#include "AeroVane.h"
+
+module AeroVaneP {
+  provides interface ReadRef<aerovane_t>;
+  uses {
+    interface Tick as Second;
+    interface AsyncGet<uint8_t> as CPSA;
+    interface AsyncGet<uint8_t> as CPSB;
+  }
+}
+implementation {
+  aerovane_t* m_data;
+  uint8_t minSpeed = 255;
+  uint8_t maxSpeed;
+
+
+  /*** Support functions ***/
+
+
+  /* Convert counts per second to mph */
+  uint8_t toMph(uint8_t cps)
+  {
+    return 2.25 * cps + 0.5;
+  }
+
+
+  /*** Method implementations ***/
+
+
+  async event void Second.fired()
+  {
+    uint8_t speed = call CPSA.get();
+
+    if (speed < minSpeed)
+      minSpeed = speed;
+    if (speed > maxSpeed)
+      maxSpeed = speed;
+  }
+
+  task void readSpeed();
+
+  command error_t ReadRef.read(aerovane_t* data)
+  {
+    if (!data)
+      return EINVAL;
+    else if (m_data)
+      return EBUSY;
+    else {
+      m_data = data;
+      post readSpeed();
+      return SUCCESS;
+    }
+  }
+
+  void signalDone(error_t);
+
+  task void readSpeed()
+  {
+    atomic {
+      m_data->min = toMph(minSpeed);
+      m_data->avg = toMph(call CPSB.get());
+      m_data->max = toMph(maxSpeed);
+      minSpeed = 255;
+      maxSpeed = 0;
+    }
+    signalDone(SUCCESS);
+  }
+
+  void signalDone(error_t error)
+  {
+    aerovane_t* tmp = m_data;
+
+    m_data = 0;
+    signal ReadRef.readDone(error, tmp);
+  }
+}