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e51c5f3018
aio: mraa_aio_read (v1.0.0) can now return -1, treat that in sensors using it Adds alot of exceptions if the aio read goes wrong Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com> Signed-off-by: Noel Eck <noel.eck@intel.com>
101 lines
3.2 KiB
C++
101 lines
3.2 KiB
C++
/*
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* Author: Alexander Komarov <alexander.komarov@intel.com>
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* Copyright (c) 2014 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <iostream>
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#include <string>
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#include <stdexcept>
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#include <unistd.h>
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#include <stdlib.h>
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#include <functional>
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#include <string.h>
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#include "joystick12.hpp"
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using namespace upm;
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// FIXME AK: to make configurable if needed
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const int Joystick12::X_left = 100;
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const int Joystick12::X_center = 1610;
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const int Joystick12::X_right= 4070;
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const int Joystick12::Y_left = 2;
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const int Joystick12::Y_center = 1610;
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const int Joystick12::Y_right= 4070;
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Joystick12::Joystick12(int pinX, int pinY) {
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if ( !(m_joystickCtxX = mraa_aio_init(pinX)) )
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{
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throw std::invalid_argument(std::string(__FUNCTION__) +
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": mraa_aio_init(pinX) failed, invalid pin?");
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return;
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}
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if ( !(m_joystickCtxY = mraa_aio_init(pinY)) )
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{
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throw std::invalid_argument(std::string(__FUNCTION__) +
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": mraa_aio_init(pinY) failed, invalid pin?");
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return;
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}
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}
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Joystick12::~Joystick12() {
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// close inputs
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mraa_result_t error;
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error = mraa_aio_close(m_joystickCtxX);
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if (error != MRAA_SUCCESS) {
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mraa_result_print(error);
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}
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error = mraa_aio_close(m_joystickCtxY);
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if (error != MRAA_SUCCESS) {
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mraa_result_print(error);
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}
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}
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float Joystick12::getXInput() {
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float in = mraa_aio_read (m_joystickCtxX);
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if (in == -1.0) return -1;
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if (in < X_left) return -1;
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if (in < X_center) return -(X_center - in) / (X_center - X_left);
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if (in == X_center) return 0;
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if (in < X_right) return (in - X_center) / (X_right - X_center);
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if (in >= X_right) return 1;
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mraa_result_print(MRAA_ERROR_UNSPECIFIED);
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return 0;
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}
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float Joystick12::getYInput() {
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float in = mraa_aio_read (m_joystickCtxY);
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if (in == -1.0) return -1;
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if (in < Y_left) return -1;
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if (in < Y_center) return -(Y_center - in) / (Y_center - Y_left);
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if (in == Y_center) return 0;
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if (in < Y_right) return (in - Y_center) / (Y_right - Y_center);
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if (in >= Y_right) return 1;
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mraa_result_print(MRAA_ERROR_UNSPECIFIED);
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return 0;
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}
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