upm/src/grove/grove.cxx

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/*
* Author: Brendan Le Foll <brendan.le.foll@intel.com>
* Copyright (c) 2014 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 "grove.h"
#include "math.h"
using namespace upm;
//// GroveLed ////
GroveLed::GroveLed(int pin)
{
mraa_init();
m_gpio = mraa_gpio_init(pin);
mraa_gpio_dir(m_gpio, MRAA_GPIO_OUT);
m_name = "LED Socket";
}
GroveLed::~GroveLed()
{
mraa_gpio_close(m_gpio);
}
mraa_result_t GroveLed::write(int value)
{
if (value >= 1) {
return mraa_gpio_write(m_gpio, 1);
}
return mraa_gpio_write(m_gpio, 0);
}
mraa_result_t GroveLed::on()
{
return write(1);
}
mraa_result_t GroveLed::off()
{
return write(0);
}
//// GroveTemp ////
GroveTemp::GroveTemp(unsigned int pin)
{
mraa_init();
m_aio = mraa_aio_init(pin);
m_name = "Temperature Sensor";
}
GroveTemp::~GroveTemp()
{
mraa_aio_close(m_aio);
}
int GroveTemp::value ()
{
int a = mraa_aio_read(m_aio);
float r = (float)(1023-a)*10000/a;
float t = 1/(log(r/10000)/3975 + 1/298.15)-273.15;
return (int) t;
}
float GroveTemp::raw_value()
{
return (float) mraa_aio_read(m_aio);
}
//// GroveLight ////
GroveLight::GroveLight(unsigned int pin)
{
mraa_init();
m_aio = mraa_aio_init(pin);
m_name = "Light Sensor";
}
GroveLight::~GroveLight()
{
mraa_aio_close(m_aio);
}
int GroveLight::value ()
{
// rough conversion to Lux
int a = mraa_aio_read(m_aio);
a = 10000/(((1023-a)*10/a)*15)^(4/3);
return a;
}
float GroveLight::raw_value()
{
return (float) mraa_aio_read(m_aio);
}