sygsr-button.hpp

#pragma once
/*
Copyright 2023 Travis J. West, Input Devices and Music Interaction Laboratory
(IDMIL), Centre for Interdisciplinary Research in Music Media and Technology
(CIRMMT), McGill University, Montréal, Canada, and Univ. Lille, Inria, CNRS,
Centrale Lille, UMR 9189 CRIStAL, F-59000 Lille, France
 
SPDX-License-Identifier: MIT
*/
 
#include "sygsp-button.hpp"
 
namespace sygaldry { namespace sygsr {
 
 
 
template<unsigned int pin_number, sygsp::ButtonActive active_level = sygsp::ButtonActive::Low>
struct Button : sygsp::ButtonGestureModel
, name_<"Button">
, description_<"A single button attached to a GPIO">
, author_<"Travis J. West">
, copyright_<"Copyright 2023 Sygaldry Contributors">
, license_<"SPDX-License-Identifier: MIT">
, version_<"0.0.0">
{
    static_assert(0 <= pin_number && pin_number <= 29);
 
    void init()
    {
        gpio_init(pin_number);
        gpio_set_dir(pin_number, false); // input mode
        if constexpr (active_level == sygsp::ButtonActive::Low) gpio_pull_up(pin_number);
        else gpio_pull_down(pin_number);
    }
 
    void operator()()
    {
        inputs.button_state = (char)gpio_get(pin_number) == (char)active_level;
        ButtonGestureModel::operator()();
    }
};
 
 
} }