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      1 /*
      2  * Author: Jon Trulson <jtrulson (at) ics.com>
      3  * Copyright (c) 2015 Intel Corporation.
      4  *
      5  * Permission is hereby granted, free of charge, to any person obtaining
      6  * a copy of this software and associated documentation files (the
      7  * "Software"), to deal in the Software without restriction, including
      8  * without limitation the rights to use, copy, modify, merge, publish,
      9  * distribute, sublicense, and/or sell copies of the Software, and to
     10  * permit persons to whom the Software is furnished to do so, subject to
     11  * the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be
     14  * included in all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     17  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     18  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     19  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
     20  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
     21  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
     22  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     23  */
     24 
     25 #include <iostream>
     26 #include <string>
     27 #include <stdexcept>
     28 
     29 #include "isd1820.h"
     30 
     31 using namespace upm;
     32 using namespace std;
     33 
     34 ISD1820::ISD1820(int playPin, int recPin)
     35 {
     36   if ( !(m_gpioPlay = mraa_gpio_init(playPin)) )
     37     {
     38       throw std::invalid_argument(std::string(__FUNCTION__) +
     39                                   ": mraa_gpio_init(playPin) failed, invalid pin?");
     40       return;
     41     }
     42 
     43   mraa_gpio_dir(m_gpioPlay, MRAA_GPIO_OUT);
     44 
     45   if ( !(m_gpioRec = mraa_gpio_init(recPin)) )
     46     {
     47       throw std::invalid_argument(std::string(__FUNCTION__) +
     48                                   ": mraa_gpio_init(recPin) failed, invalid pin?");
     49       return;
     50     }
     51 
     52   mraa_gpio_dir(m_gpioRec, MRAA_GPIO_OUT);
     53 
     54   // make sure we are not recording or playing
     55   play(false);
     56   record(false);
     57 }
     58 
     59 ISD1820::~ISD1820()
     60 {
     61   mraa_gpio_close(m_gpioPlay);
     62   mraa_gpio_close(m_gpioRec);
     63 }
     64 
     65 void ISD1820::play(bool enable)
     66 {
     67   if (enable)
     68     {
     69       // make sure we are not recording
     70       record(false);
     71       mraa_gpio_write(m_gpioPlay, 1);
     72     }
     73   else
     74     {
     75       mraa_gpio_write(m_gpioPlay, 0);
     76     }
     77 }
     78 
     79 void ISD1820::record(bool enable)
     80 {
     81   if (enable)
     82     {
     83       // make sure we are not playing
     84       play(false);
     85       mraa_gpio_write(m_gpioRec, 1);
     86     }
     87   else
     88     {
     89       mraa_gpio_write(m_gpioRec, 0);
     90     }
     91 }
     92