Full color support, rework the directory structure

firmware/Application/ButtonManager.h

@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2019  Max Regan
+ *
+ * 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.
+ */
+
+#pragma once
+
+#include <functional>
+
+#include "Bsp/TaskScheduler.h"
+#include "Bsp/Task.h"
+#include "Bsp/ReturnCode.h"
+
+namespace BSP {
+
+class ButtonManager : public Common::Schedule::Task {
+public:
+    ButtonManager(Common::Schedule::TaskScheduler &scheduler,
+                  uint8_t up_gpio_idx,
+                  uint8_t mid_gpio_idx,
+                  uint8_t down_gpio_idx,
+                  Common::time_t debounce_time)
+        : m_scheduler(scheduler)
+        , m_buttons
+        {
+         button_state(up_gpio_idx, debounce_time, ButtonManager::nop_callback),
+         button_state(mid_gpio_idx, debounce_time, ButtonManager::nop_callback),
+         button_state(down_gpio_idx, debounce_time, ButtonManager::nop_callback),
+        }
+    {
+        m_instance = this;
+    }
+
+    ButtonManager() = delete;
+
+    // TODO: Make a real singleton instead
+    static ButtonManager *m_instance;
+
+    enum Button {
+        UP = 0,
+        MID,
+        DOWN,
+        Count
+    };
+
+    enum class ButtonState {
+         PRESSED,
+         NOT_PRESSED
+    };
+
+    using ChangeCallback = std::function<void(ButtonState)>;
+
+    Common::Schedule::NextTime execute() override;
+
+    Common::ReturnCode init();
+    void set_callback(Button btn, ChangeCallback callback);
+    void remove_callback(Button btn);
+
+    static void irq();
+
+private:
+
+    struct button_state {
+
+        button_state(uint8_t gpio_index,
+                     Common::time_t debounce_time,
+                     ChangeCallback callback)
+            : m_gpio_idx(gpio_index)
+            , m_debounce_time(debounce_time)
+            , m_state(ButtonState::NOT_PRESSED)
+            , m_state_change_ts(0)
+            , m_callback(callback)
+        {}
+        uint8_t const m_gpio_idx;
+        Common::time_t const m_debounce_time;
+
+        ButtonState m_prev_call_state; /*<! The last state the button was in when it the callback was called */
+        ButtonState m_state; /*<! The state the button was in during the last iteration */
+        Common::time_t m_state_change_ts; /*<! The system time when the button entered its current state */
+        ChangeCallback m_callback; /*<! The callback to call when the button has changed states (post-debounce) */
+    };
+
+    Common::Schedule::TaskScheduler &m_scheduler;
+    button_state m_buttons[Button::Count];
+
+    static void nop_callback(ButtonState) {};
+};
+
+}