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/*
* Author: Alexander Komarov <alexander.komarov@intel.com>
* Copyright (c) 2014 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 <string>
#include <stdexcept>
#include <unistd.h>
#include <stdlib.h>
#include <functional>
#include <string.h>
#include "joystick12.h"
using namespace upm;
// FIXME AK: to make configurable if needed
const int Joystick12::X_left = 100;
const int Joystick12::X_center = 1610;
const int Joystick12::X_right= 4070;
const int Joystick12::Y_left = 2;
const int Joystick12::Y_center = 1610;
const int Joystick12::Y_right= 4070;
Joystick12::Joystick12(int pinX, int pinY) {
if ( !(m_joystickCtxX = mraa_aio_init(pinX)) )
{
throw std::invalid_argument(std::string(__FUNCTION__) +
": mraa_aio_init(pinX) failed, invalid pin?");
return;
}
if ( !(m_joystickCtxY = mraa_aio_init(pinY)) )
{
throw std::invalid_argument(std::string(__FUNCTION__) +
": mraa_aio_init(pinY) failed, invalid pin?");
return;
}
}
Joystick12::~Joystick12() {
// close inputs
mraa_result_t error;
error = mraa_aio_close(m_joystickCtxX);
if (error != MRAA_SUCCESS) {
mraa_result_print(error);
}
error = mraa_aio_close(m_joystickCtxY);
if (error != MRAA_SUCCESS) {
mraa_result_print(error);
}
}
float Joystick12::getXInput() {
float in = mraa_aio_read (m_joystickCtxX);
if (in < X_left) return -1;
if (in < X_center) return -(X_center - in) / (X_center - X_left);
if (in == X_center) return 0;
if (in < X_right) return (in - X_center) / (X_right - X_center);
if (in >= X_right) return 1;
mraa_result_print(MRAA_ERROR_UNSPECIFIED);
return 0;
}
float Joystick12::getYInput() {
float in = mraa_aio_read (m_joystickCtxY);
if (in < Y_left) return -1;
if (in < Y_center) return -(Y_center - in) / (Y_center - Y_left);
if (in == Y_center) return 0;
if (in < Y_right) return (in - Y_center) / (Y_right - Y_center);
if (in >= Y_right) return 1;
mraa_result_print(MRAA_ERROR_UNSPECIFIED);
return 0;
}
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