mirror of
https://github.com/eclipse/upm.git
synced 2025-03-17 14:07:30 +03:00
75 lines
1.8 KiB
C++
75 lines
1.8 KiB
C++
![]() |
/*
|
||
|
* Author: Jon Trulson <jtrulson@ics.com>
|
||
|
* Copyright (c) 2015 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 "dfrph.h"
|
||
|
|
||
|
using namespace std;
|
||
|
using namespace upm;
|
||
|
|
||
|
DFRPH::DFRPH(int pin, float aref) :
|
||
|
m_aio(pin)
|
||
|
{
|
||
|
m_aRes = (1 << m_aio.getBit());
|
||
|
m_aref = aref;
|
||
|
|
||
|
m_offset = 0.0;
|
||
|
}
|
||
|
|
||
|
DFRPH::~DFRPH()
|
||
|
{
|
||
|
}
|
||
|
|
||
|
float DFRPH::volts()
|
||
|
{
|
||
|
int val = m_aio.read();
|
||
|
|
||
|
return(val * (m_aref / m_aRes));
|
||
|
}
|
||
|
|
||
|
void DFRPH::setOffset(float offset)
|
||
|
{
|
||
|
m_offset = offset;
|
||
|
}
|
||
|
|
||
|
float DFRPH::pH(unsigned int samples)
|
||
|
{
|
||
|
if (!samples)
|
||
|
samples = 1;
|
||
|
|
||
|
float sum = 0.0;
|
||
|
|
||
|
for (int i=0; i<samples; i++)
|
||
|
{
|
||
|
sum += volts();
|
||
|
usleep(20000);
|
||
|
}
|
||
|
|
||
|
sum /= samples;
|
||
|
|
||
|
// 3.5 is a 'magic' DFRobot number. Seems to work though :)
|
||
|
return (3.5 * sum + m_offset);
|
||
|
}
|