Diff: Anemometer.cpp

Revision:

0:457832d52954

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Anemometer.cpp	Sat Feb 25 03:23:51 2012 +0000
@@ -0,0 +1,60 @@
+/* Copyright 2012 Adam Green (http://mbed.org/users/AdamGreen/)
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+/* Implementation of class to interface for anemometer sensor with Sparkfun Weather Meters: 
+    http://www.sparkfun.com/products/8942
+*/
+#include <mbed.h>
+#include "Anemometer.h"
+
+
+#define REV_PER_SECOND_TO_KMPH  2.4f
+
+
+CAnemometer::CAnemometer(PinName AnemometerPin, unsigned int IgnoreTimeForDebounceInMicroSeconds)
+    : CDebouncedFallingEdgeCounter(AnemometerPin, IgnoreTimeForDebounceInMicroSeconds)
+{
+    m_CurrentWindSpeed = 0.0f;
+    ResetMaximumWindSpeed();
+    m_OneSecondTicker.attach_us<CAnemometer>(this, &CAnemometer::OneSecondTickerISR, 1000000);
+}
+
+
+void CAnemometer::ResetMaximumWindSpeed()
+{
+    m_MaximumWindSpeed = m_CurrentWindSpeed;
+}
+
+
+void CAnemometer::OneSecondTickerISR()
+{
+    unsigned int GetCurrentCount = GetCountAndZero();
+    
+    m_CurrentWindSpeed = (float)GetCurrentCount * REV_PER_SECOND_TO_KMPH;
+    if (m_CurrentWindSpeed > m_MaximumWindSpeed)
+    {
+        m_MaximumWindSpeed = m_CurrentWindSpeed;
+    }
+}
+
+float CAnemometer::GetCurrentWindSpeed()
+{
+    return m_CurrentWindSpeed;
+}
+
+
+float CAnemometer::GetMaximumWindSpeed()
+{
+    return m_MaximumWindSpeed;
+}