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Diff: Anemometer.cpp
- Revision:
- 0:457832d52954
diff -r 000000000000 -r 457832d52954 Anemometer.cpp --- /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; +}