121 lines
2.5 KiB
C++
121 lines
2.5 KiB
C++
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/*
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* Copyright (C) 2017 Jared Boone, ShareBrained Technology, Inc.
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#pragma once
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#include <cstdint>
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namespace portapack {
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class Backlight {
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public:
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using value_t = int_fast8_t;
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virtual ~Backlight() = default;
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virtual value_t levels() const = 0;
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virtual void set_level(const value_t value) = 0;
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virtual value_t level() const = 0;
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virtual void increase() = 0;
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virtual void decrease() = 0;
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virtual void on() = 0;
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virtual void off() = 0;
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virtual bool is_on() const = 0;
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};
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class BacklightBase : public Backlight {
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public:
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void increase() override {
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set_level(level() + 1);
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}
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void decrease() override {
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set_level(level() - 1);
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}
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};
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class BacklightOnOff : public BacklightBase {
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public:
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value_t levels() const override {
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return 1;
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}
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void set_level(const value_t) override {
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}
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value_t level() const override {
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return levels() - 1;
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}
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void on() override;
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void off() override;
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bool is_on() const override {
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return on_;
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}
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private:
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static constexpr value_t maximum_level = 1;
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bool on_ { false };
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};
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class BacklightCAT4004 : public BacklightBase {
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public:
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value_t levels() const override {
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return maximum_level + 1;
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}
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void set_level(const value_t value) override;
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value_t level() const override {
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return level_;
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}
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void on() override;
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void off() override;
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bool is_on() const override {
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return on_;
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}
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private:
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static constexpr value_t initial_brightness = 25;
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static constexpr value_t maximum_level = 31;
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static constexpr uint32_t ticks_setup = 204e6 * 10e-6;
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static constexpr uint32_t ms_pwrdwn = 5;
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static constexpr uint32_t ticks_lo = 204e6 * 1e-6;
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static constexpr uint32_t ticks_hi = 204e6 * 1e-6;
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value_t level_ { initial_brightness };
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bool on_ { false };
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void pulses(value_t target);
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void pulse();
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};
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} /* namespace portapack */
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