1 /* 2 * Author: Zion Orent <sorent (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 <string> 26 #include <stdexcept> 27 #include "waterlevel.h" 28 29 using namespace upm; 30 31 WaterLevel::WaterLevel(int pin) 32 { 33 if ( !(m_gpio = mraa_gpio_init(pin)) ) 34 { 35 throw std::invalid_argument(std::string(__FUNCTION__) + 36 ": mraa_gpio_init() failed, invalid pin?"); 37 return; 38 } 39 mraa_gpio_dir(m_gpio, MRAA_GPIO_IN); 40 } 41 42 WaterLevel::~WaterLevel() 43 { 44 mraa_gpio_close(m_gpio); 45 } 46 47 bool WaterLevel::isSubmerged() 48 { 49 // Submerged causes 0; being above water is 1 50 return (!(bool)mraa_gpio_read(m_gpio)); 51 } 52
