Alexandre Bouillot / Shinyei

Shinnyei PPD42NJ particles sensor reading

Dependents:   PwmReaderTest

Library to read values out of a Shinyei PPD42NJ particles sensor

Shinyei.h@0:995d42a37328, 2017-01-26 (annotated)

Committer:
abouillot
Date:
Thu Jan 26 15:07:26 2017 +0000
Revision:
0:995d42a37328
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
abouillot 0:995d42a37328 1 /*!
abouillot 0:995d42a37328 2 * Shinyei.cpp
abouillot 0:995d42a37328 3 *
abouillot 0:995d42a37328 4 * Read the particle concentration using a Shinyei PPD42NJ sensor
abouillot 0:995d42a37328 5 *
abouillot 0:995d42a37328 6 * Copyright (c) 2017 - Alexandre Bouillot github.com/abouillot
abouillot 0:995d42a37328 7 *
abouillot 0:995d42a37328 8 * Permission is hereby granted, free of charge, to any person obtaining a copy
abouillot 0:995d42a37328 9 * of this software and associated documnetation files (the "Software"), to deal
abouillot 0:995d42a37328 10 * in the Software without restriction, including without limitation the rights
abouillot 0:995d42a37328 11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
abouillot 0:995d42a37328 12 * copies of the Software, and to permit persons to whom the Software is
abouillot 0:995d42a37328 13 * furished to do so, subject to the following conditions:
abouillot 0:995d42a37328 14 *
abouillot 0:995d42a37328 15 * The above copyright notice and this permission notice shall be included in
abouillot 0:995d42a37328 16 * all copies or substantial portions of the Software.
abouillot 0:995d42a37328 17 *
abouillot 0:995d42a37328 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
abouillot 0:995d42a37328 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
abouillot 0:995d42a37328 20 * FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
abouillot 0:995d42a37328 21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
abouillot 0:995d42a37328 22 * LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
abouillot 0:995d42a37328 23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
abouillot 0:995d42a37328 24 * THE SOFTWARE.
abouillot 0:995d42a37328 25 */
abouillot 0:995d42a37328 26
abouillot 0:995d42a37328 27 #include "mbed.h"
abouillot 0:995d42a37328 28 #include "PwmReader.h"
abouillot 0:995d42a37328 29
abouillot 0:995d42a37328 30 class Shinyei
abouillot 0:995d42a37328 31 {
abouillot 0:995d42a37328 32 public:
abouillot 0:995d42a37328 33 Shinyei(PinName pin) : _pwm(pin), _dataReady(false) {
abouillot 0:995d42a37328 34 };
abouillot 0:995d42a37328 35 void startSampling(int duration = 30);
abouillot 0:995d42a37328 36 void startSampling(Callback< void()>, int duration = 30);
abouillot 0:995d42a37328 37 void stopSampling();
abouillot 0:995d42a37328 38 bool dataReady() {
abouillot 0:995d42a37328 39 return _dataReady;
abouillot 0:995d42a37328 40 };
abouillot 0:995d42a37328 41 float concentration() {
abouillot 0:995d42a37328 42 if (_dataReady)
abouillot 0:995d42a37328 43 return _concentration;
abouillot 0:995d42a37328 44 else
abouillot 0:995d42a37328 45 return -1;
abouillot 0:995d42a37328 46 };
abouillot 0:995d42a37328 47 private:
abouillot 0:995d42a37328 48 void samplingComplete();
abouillot 0:995d42a37328 49 void init();
abouillot 0:995d42a37328 50 PwmReader _pwm;
abouillot 0:995d42a37328 51 bool _dataReady;
abouillot 0:995d42a37328 52 Timeout _samplingTimer;
abouillot 0:995d42a37328 53 float _concentration;
abouillot 0:995d42a37328 54 Callback<void()> _callback;
abouillot 0:995d42a37328 55 bool _callbackSet;
abouillot 0:995d42a37328 56 };