diff options
Diffstat (limited to 'peripheral/libupm/src/cwlsxxa/cwlsxxa.cxx')
| -rw-r--r-- | peripheral/libupm/src/cwlsxxa/cwlsxxa.cxx | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/peripheral/libupm/src/cwlsxxa/cwlsxxa.cxx b/peripheral/libupm/src/cwlsxxa/cwlsxxa.cxx deleted file mode 100644 index 8101698..0000000 --- a/peripheral/libupm/src/cwlsxxa/cwlsxxa.cxx +++ /dev/null @@ -1,183 +0,0 @@ -/* - * Author: Jon Trulson <jtrulson@ics.com> - * Copyright (c) 2016 Intel Corporation. - * - * Permission is hereby granted, free of charge, to any person obtaining - * a copy of this software and associated documentation files (the - * "Software"), to deal in the Software without restriction, including - * without limitation the rights to use, copy, modify, merge, publish, - * distribute, sublicense, and/or sell copies of the Software, and to - * permit persons to whom the Software is furnished to do so, subject to - * the following conditions: - * - * The above copyright notice and this permission notice shall be - * included in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE - * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION - * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION - * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - -#include <iostream> - -#include "cwlsxxa.hpp" - -using namespace upm; -using namespace std; - -// for current loop reads that seems a little noisy, we average over -// several aio reads. -static const int maxSamples = 50; - -// conversion from celcius to fahrenheit - -static float c2f(float c) -{ - return (c * (9.0 / 5.0) + 32.0); -} - - -CWLSXXA::CWLSXXA(int gPin, int hPin, int tPin, float rResistor, float aref) : - m_aioCO2(gPin), m_aioHum(0), m_aioTemp(0) -{ - m_hasHum = (hPin >= 0) ? true : false; - m_hasTemp = (tPin >= 0) ? true : false; - - if (m_hasTemp) - { - m_aioTemp = new mraa::Aio(tPin); - m_aResTemp = (1 << m_aioTemp->getBit()); - } - else - m_aResTemp = 0; - - if (m_hasHum) - { - m_aioHum = new mraa::Aio(hPin); - m_aResHum = (1 << m_aioHum->getBit()); - } - else - m_aResHum = 0; - - m_aResCO2 = (1 << m_aioCO2.getBit()); - - m_temperature = 0.0; - m_humidity = 0.0; - m_co2 = 0.0; - - m_aref = aref; - m_rResistor = rResistor; -} - -CWLSXXA::~CWLSXXA() -{ - if (m_aioHum) - delete m_aioHum; - if (m_aioTemp) - delete m_aioTemp; -} - -void CWLSXXA::update() -{ - // temperature - int val; - float volts; - float milliamps = 0.0; - - int samples; - if (m_rResistor) - samples = maxSamples; - else - samples = 1; - - - // temperature - if (m_hasTemp) - { - // fortunately, this sensor always reports temperatures in C, - // regardless of the configuration of the LCD display (for - // models that have an LCD display) - - val = average(m_aioTemp, samples); - - volts = (float(val) * (m_aref / m_aResTemp)); - - // valid range is 10-35C, current loop range is 16ma (20ma - 4ma) - if (!m_rResistor) - m_temperature = ((volts / m_aref) * 25.0) + 10.0; - else - { - milliamps = ((volts / m_rResistor * 1000.0) - 4.0); - if (milliamps < 0.0) // not connected - milliamps = 0.0; - m_temperature = (milliamps * (25.0 / 16.0)) + 10.0; - } - } - - // humidity - if (m_hasHum) - { - val = average(m_aioHum, samples); - volts = (float(val) * (m_aref / m_aResHum)); - - // range is 0-100 - if (!m_rResistor) - m_humidity = ((volts / m_aref) * 100.0); - else - { - milliamps = ((volts / m_rResistor * 1000.0) - 4.0); - if (milliamps < 0.0) // not connected - milliamps = 0.0; - m_humidity = milliamps * (100.0 / 16.0); - } - } - - // CO2 - val = average(&m_aioCO2, samples); - volts = (float(val) * (m_aref / m_aResCO2)); - - // CO2 range is 0-2000ppm - if (!m_rResistor) - m_co2 = ((volts / m_aref) * 2000.0); - else - { - milliamps = ((volts / m_rResistor * 1000.0) - 4.0); - if (milliamps < 0.0) // not connected - milliamps = 0.0; - m_co2 = milliamps * (2000.0 / 16.0); - } -} - -float CWLSXXA::getTemperature(bool fahrenheit) -{ - if (fahrenheit) - return c2f(m_temperature); - else - return m_temperature; -} - -float CWLSXXA::getHumidity() -{ - return m_humidity; -} - -float CWLSXXA::getCO2() -{ - return m_co2; -} - -int CWLSXXA::average(mraa::Aio *aio, int samples) -{ - if (samples <= 0) - samples = 1; - - int avg = 0; - for (int i=0; i<samples; i++) - avg += aio->read(); - - return (avg / samples); -} |