Max Regan
a7f1ffc1b5
The display currently shows the time, with hours and minutes, and is capable of receiving input with buttons (though does nothing). It sleeps during intervals where nothing is happening. The display task runs once per second, and RTC alarm A is used for periodic alarms to update the system time.
101 lines
3.2 KiB
C++
101 lines
3.2 KiB
C++
/*
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* Copyright (C) 2019 Max Regan
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice shall be included in
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* 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, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#pragma once
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#include "Task.h"
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#include "ReturnCode.h"
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namespace BSP {
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class ButtonManager : public Common::Schedule::Task {
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public:
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ButtonManager(uint8_t up_gpio_idx,
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uint8_t mid_gpio_idx,
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uint8_t down_gpio_idx,
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Common::time_t debounce_time)
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: m_buttons
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{
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button_state(up_gpio_idx, debounce_time, ButtonManager::nop_callback),
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button_state(mid_gpio_idx, debounce_time, ButtonManager::nop_callback),
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button_state(down_gpio_idx, debounce_time, ButtonManager::nop_callback),
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}
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{
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m_instance = this;
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}
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ButtonManager() = delete;
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// TODO: Make a real singleton instead
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static ButtonManager *m_instance;
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enum Button {
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UP = 0,
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MID,
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DOWN,
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Count
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};
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enum class ButtonState {
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PRESSED,
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NOT_PRESSED
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};
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typedef void (*ChangeCallback)(ButtonState);
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Common::Schedule::NextTime execute() override;
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Common::ReturnCode init();
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void set_callback(Button btn, ChangeCallback callback);
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void remove_callback(Button btn);
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static void irq();
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private:
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struct button_state {
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button_state(uint8_t gpio_index,
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Common::time_t debounce_time,
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ChangeCallback callback)
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: m_gpio_idx(gpio_index)
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, m_debounce_time(debounce_time)
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, m_state(ButtonState::NOT_PRESSED)
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, m_state_change_ts(0)
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, m_callback(callback)
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{}
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uint8_t const m_gpio_idx;
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Common::time_t const m_debounce_time;
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ButtonState m_prev_call_state; /*<! The last state the button was in when it the callback was called */
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ButtonState m_state; /*<! The state the button was in during the last iteration */
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Common::time_t m_state_change_ts; /*<! The system time when the button entered its current state */
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ChangeCallback m_callback; /*<! The callback to call when the button has changed states (post-debounce) */
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};
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button_state m_buttons[Button::Count];
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static void nop_callback(ButtonState) {};
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};
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}
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