Add AeroVane infrastructure to support physical/reading of the sensor.

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

diff --git a/tos/platforms/tmirws/sensors/AnemometerReadP.nc b/tos/platforms/tmirws/sensors/AnemometerReadP.nc
new file mode 100644 (file)
index 0000000..3b4a545
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+++ b/tos/platforms/tmirws/sensors/AnemometerReadP.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.
+ */
+ 
+/**
+ * Instantaneous anemometer read; depends upon prior call for correct timing.
+ * 
+ * @author R. Steve McKown <rsmckown@gmail.com>
+ */
+ 
+#include "Anemometer.h"
+
+module AnemometerReadP {
+  provides {
+    interface Init;
+    interface StdControl;
+    interface AsyncGet<uint16_t> as Count;
+  }
+  uses
+    interface Counter<TMicro,uint16_t> as SpinCounter;
+}
+implementation {
+  uint16_t m_count;
+
+  command error_t Init.init()
+  {
+    atomic {
+      /* Initialize Timer A, clock source is IO pin P1.0.  SpinCounter's clock
+       * is Timer A.
+       */
+      TACTL = 0;
+      TACTL = TACLR | ID_0 | TASSEL_0;
+      P1SEL |= 1;
+    }
+    return SUCCESS;
+  }
+
+  command error_t StdControl.start()
+  {
+    atomic {
+      TACTL |= MC_2;
+      m_count = call SpinCounter.get();
+    }
+    return SUCCESS;
+  }
+
+  command error_t StdControl.stop()
+  {
+    atomic TACTL &= ~(MC1|MC0);
+  }
+
+  async command uint16_t Count.get()
+  {
+    atomic {
+      uint16_t newCount;
+      uint16_t speed;
+
+      newCount = call SpinCounter.get();
+      speed = newCount - m_count;
+      m_count = newCount;
+      return speed;
+    }
+  }
+
+  async event void SpinCounter.overflow() {}
+}