mirror of
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922e0cc26b
To make room for UPM C and C++ sensor code to coexist, all UPM
C++ headers have been renamed from h -> hpp. This commit contains
updates to documentation, includes, cmake collateral, examples, and
swig interface files.
* Renamed all cxx/cpp header files which contain the string
'copyright intel' from .h -> .hpp (if not already hpp).
* Replaced all references to .h with .hpp in documentation,
source files, cmake collateral, example code, and swig interface
files.
* Replaced cmake variable module_h with module_hpp.
* Intentionally left upm.h since this file currently does not
contain code (documentation only).
Signed-off-by: Noel Eck <noel.eck@intel.com>
125 lines
3.0 KiB
C++
125 lines
3.0 KiB
C++
/*
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* Author: Jon Trulson <jtrulson@ics.com>
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* Copyright (c) 2015 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <iostream>
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#include <string>
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#include <stdexcept>
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#include "grovewfs.hpp"
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using namespace upm;
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using namespace std;
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GroveWFS::GroveWFS(int pin)
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{
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if ( !(m_gpio = mraa_gpio_init(pin)) )
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{
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throw std::invalid_argument(std::string(__FUNCTION__) +
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": mraa_gpio_init() failed, invalid pin?");
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return;
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}
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mraa_gpio_dir(m_gpio, MRAA_GPIO_IN);
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initClock();
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m_flowCounter = 0;
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m_isrInstalled = false;
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}
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GroveWFS::~GroveWFS()
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{
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if (m_isrInstalled)
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stopFlowCounter();
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mraa_gpio_close(m_gpio);
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}
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void GroveWFS::initClock()
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{
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gettimeofday(&m_startTime, NULL);
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}
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uint32_t GroveWFS::getMillis()
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{
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struct timeval elapsed, now;
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uint32_t elapse;
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// get current time
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gettimeofday(&now, NULL);
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// compute the delta since m_startTime
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if( (elapsed.tv_usec = now.tv_usec - m_startTime.tv_usec) < 0 )
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{
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elapsed.tv_usec += 1000000;
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elapsed.tv_sec = now.tv_sec - m_startTime.tv_sec - 1;
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}
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else
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{
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elapsed.tv_sec = now.tv_sec - m_startTime.tv_sec;
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}
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elapse = (uint32_t)((elapsed.tv_sec * 1000) + (elapsed.tv_usec / 1000));
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// never return 0
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if (elapse == 0)
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elapse = 1;
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return elapse;
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}
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void GroveWFS::startFlowCounter()
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{
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initClock();
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// install our interrupt handler
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mraa_gpio_isr(m_gpio, MRAA_GPIO_EDGE_RISING,
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&flowISR, this);
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m_isrInstalled = true;
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}
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void GroveWFS::stopFlowCounter()
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{
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// remove the interrupt handler
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mraa_gpio_isr_exit(m_gpio);
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m_isrInstalled = false;
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}
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void GroveWFS::flowISR(void *ctx)
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{
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upm::GroveWFS *This = (upm::GroveWFS *)ctx;
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This->m_flowCounter++;
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}
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float GroveWFS::flowRate()
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{
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uint32_t millis = getMillis();
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uint32_t flow = flowCounter();
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// 7.5 comes from the seeedstudio page, see the confusing datasheet :)
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float flowRate = (float(flow) * 7.5) / ((float(millis) / 1000.0) * 60.0);
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return flowRate;
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}
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