Add Stopwatch application

It can be started, stopped, and cleared. It also continues to run if
you leave the screen.

firmware/Application/ScreenManager.cpp

@@ -34,6 +34,7 @@ ScreenManager::ScreenManager(BSP::Schedule::TaskScheduler &scheduler,
     : m_scheduler(scheduler)
     , m_screen_stack{nullptr}
     , m_screen_stack_depth(0)
+    , m_root_initialized(false)
     , m_display(display)
     , m_buttons(buttons)
 {
@@ -74,10 +75,14 @@ NextTime ScreenManager::execute()
 
 ReturnCode ScreenManager::set_root_screen(Screen &screen)
 {
-    m_screen_stack[m_screen_stack_depth] = &screen;
+    m_screen_stack[0] = &screen;
+
+    if (!m_root_initialized) {
         m_screen_stack_depth = 1;
         current_screen()->enable();
         m_scheduler.add_task(*this, NextTime::asap());
+        m_root_initialized = true;
+    }
 
     return ReturnCode::OK;
 }

firmware/Application/ScreenManager.h

@@ -62,6 +62,7 @@ private:
 
     std::array<Screen *, MAX_SCREEN_STACK> m_screen_stack;
     std::size_t m_screen_stack_depth;
+    bool m_root_initialized;
 
     BSP::DisplayDriver &m_display;
     BSP::ButtonManager &m_buttons;

firmware/Application/Screens/MenuScreen.h

@@ -100,7 +100,7 @@ public:
     void render() {
         const struct font &font = default_font;
 
-        //m_driver.clear();
+        m_driver.clear();
 
         uint32_t x = 0;
         uint32_t y = 0;
@@ -124,6 +124,16 @@ public:
         m_driver.refresh();
     }
 
+    BSP::ReturnCode add_item(MenuScreenItem item) {
+        if (m_num_items ==  MAX_ITEMS) {
+            return BSP::ReturnCode::FAIL;
+        }
+
+        m_items[m_num_items++] = item;
+
+        return BSP::ReturnCode::OK;
+    }
+
     BSP::ReturnCode init() {
         return BSP::ReturnCode::OK;
     }
@@ -134,7 +144,6 @@ public:
 
     void enable() override {
         m_selected = 0;
-        m_driver.clear();
         render();
     }
 

firmware/Application/Screens/SetTimeScreen.cpp

@@ -50,7 +50,6 @@ ReturnCode SetTimeScreen::init()
 
 NextTime SetTimeScreen::execute()
 {
-    //TODO: Fix this so it doesn't constantly refresh
     refresh();
 
     return NextTime::never();

firmware/Application/Screens/StopwatchScreen.cpp

@@ -0,0 +1,173 @@
+/*
+ * 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.
+ */
+
+#include <cstring>
+
+#include "Application/Screens/StopwatchScreen.h"
+#include "Application/SystemFonts.h"
+#include "Bsp/SystemTime.h"
+
+using BSP::ReturnCode;
+using BSP::Time;
+using BSP::Schedule::NextTime;
+
+StopwatchScreen::StopwatchScreen(BSP::DisplayDriver &display,
+                             ScreenManager &manager)
+    : m_display(display)
+    , m_manager(manager)
+    , m_is_running(false)
+    , m_accumulated_time()
+    , m_last_time()
+    , m_font(default_font)
+
+{}
+
+ReturnCode StopwatchScreen::init()
+{
+    return ReturnCode::OK;
+}
+
+NextTime StopwatchScreen::execute()
+{
+    refresh();
+
+    if (m_is_running) {
+        add_time();
+    }
+
+    return NextTime::asap();
+}
+
+static char get_char_for_digit(uint8_t bcd_digit)
+{
+    return (bcd_digit % 10) + '0';
+}
+
+void StopwatchScreen::display_number(uint32_t *x, uint32_t y,
+                                     uint32_t tens, uint32_t ones)
+{
+    char time_str[3] = { 0 };
+    time_str[0] = get_char_for_digit(tens);
+    time_str[1] = get_char_for_digit(ones);
+    time_str[2] = '\0';
+
+    m_display.string_at(x, y, time_str, &m_font);
+}
+
+void StopwatchScreen::display_number(uint32_t *x, uint32_t y,
+                                     uint32_t hundreds, uint32_t tens, uint32_t ones)
+{
+    char time_str[4] = { 0 };
+    time_str[0] = get_char_for_digit(hundreds);
+    time_str[1] = get_char_for_digit(tens);
+    time_str[2] = get_char_for_digit(ones);
+    time_str[3] = '\0';
+
+    m_display.string_at(x, y, time_str, &m_font);
+}
+
+void StopwatchScreen::refresh()
+{
+    m_display.clear();
+
+    //uint32_t width = m_display.get_width();
+    uint32_t x = (m_display.get_width() - m_font.width * 7) / 2;
+    uint32_t y = (m_display.get_height() - m_font.height * 2) / 2;
+
+    uint64_t total_millis = BSP::Time::to_millis(m_accumulated_time);
+    uint32_t millis = total_millis % 1000;
+
+    uint64_t total_seconds = total_millis / 1000;
+    uint32_t seconds = total_seconds % 60;
+
+    uint64_t total_minutes = total_seconds / 60;
+    uint32_t minutes = total_minutes % 60;
+
+    uint64_t hours = total_minutes / 60;
+
+    display_number(&x, y,
+                   hours / 100, hours / 10, hours);
+
+    m_display.string_at(&x, y, ":", &m_font);
+
+    display_number(&x, y,
+                   minutes / 10, minutes % 10);
+
+    m_display.string_at(&x, y, ":", &m_font);
+
+    y += m_font.height;
+    x = (m_display.get_width() - 6 * m_font.width) / 2 ;
+
+    display_number(&x, y,
+                   seconds / 10, seconds);
+
+    m_display.string_at(&x, y, ".", &m_font);
+
+    display_number(&x, y,
+                   millis / 100, millis / 10, millis);
+
+    m_display.refresh();
+}
+
+void StopwatchScreen::add_time()
+{
+    BSP::time_t time;
+
+    BSP::SystemTimer::get_time(time);
+
+    m_accumulated_time += time - m_last_time;
+
+    m_last_time = time;
+}
+
+void StopwatchScreen::notify_up_button()
+{
+    m_manager.pop_screen();
+    return;
+}
+
+void StopwatchScreen::notify_middle_button()
+{
+    BSP::SystemTimer::get_time(m_last_time);
+    m_accumulated_time = 0;
+}
+
+void StopwatchScreen::notify_down_button()
+{
+    if (!m_is_running) {
+        // Start
+        BSP::SystemTimer::get_time(m_last_time);
+    } else {
+        // Stop
+        add_time();
+    }
+
+    m_is_running = !m_is_running;
+    return;
+}
+
+void StopwatchScreen::enable()
+{
+}
+
+void StopwatchScreen::disable()
+{
+}

firmware/Application/Screens/StopwatchScreen.h

@@ -0,0 +1,59 @@
+/*
+ * 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 "Application/ScreenManager.h"
+#include "Bsp/Drivers/DisplayDriver.h"
+#include "Bsp/ReturnCode.h"
+#include "Bsp/Task.h"
+#include "Bsp/Time.h"
+
+class StopwatchScreen : public Screen {
+public:
+
+    StopwatchScreen(BSP::DisplayDriver &display,
+                    ScreenManager &m_manager);
+
+    BSP::ReturnCode init();
+    BSP::Schedule::NextTime execute() override;
+
+    void enable() override;
+    void disable() override;
+    void notify_up_button() override;
+    void notify_middle_button() override;
+    void notify_down_button() override;
+
+private:
+
+    void display_number(uint32_t *x, uint32_t y, uint32_t tens, uint32_t ones);
+    void display_number(uint32_t *x, uint32_t y, uint32_t hundreds, uint32_t tens, uint32_t ones);
+    void refresh();
+    void add_time();
+
+    BSP::DisplayDriver &m_display;
+    ScreenManager &m_manager;
+
+    bool m_is_running;
+    BSP::time_t m_accumulated_time;
+    BSP::time_t m_last_time;
+    const struct font &m_font;
+};

firmware/Application/main.cpp

@@ -34,6 +34,7 @@
 #include "Application/Screens/MenuScreen.h"
 #include "Application/Screens/SetTimeScreen.h"
 #include "Application/Screens/SetDateScreen.h"
+#include "Application/Screens/StopwatchScreen.h"
 
 #include "Bsp/macros.h"
 
@@ -51,29 +52,43 @@ static BSP::ButtonManager g_btn_manager(g_sched, 2, 1, 0, Time::millis(1));
 static ScreenManager g_screen_manager(g_sched, g_display, g_btn_manager);
 static SetTimeScreen g_set_time_screen(g_display, g_screen_manager);
 static SetTimeScreen g_set_date_screen(g_display, g_screen_manager);
+static StopwatchScreen g_stopwatch_screen(g_display, g_screen_manager);
 
 static MenuScreen g_enable_debug(g_display,
                                  g_screen_manager,
                                  "SW Update",
                                  std::initializer_list<MenuScreenItem>({MenuScreenItem("Enable", []() { BSP::LowPower::enable_debug(); }),
-                                                                        MenuScreenItem("Disable", []() { BSP::LowPower::disable_debug();
+                                                                        MenuScreenItem("Disable", []() { BSP::LowPower::disable_debug();}
-                                                                                                 })}));
+                                                                            )}));
 // static DebugScreen g_debug_screen(g_display, g_screen_manager);
 
+static MenuScreen g_set_face_screen(g_display,
+                                    g_screen_manager,
+                                    "Face",
+                                    std::initializer_list<MenuScreenItem>());
+
 static MenuScreen g_settings_menu_screen(g_display,
                                          g_screen_manager,
                                          "Settings",
                                          std::initializer_list<MenuScreenItem>({MenuScreenItem("Set Time", g_set_time_screen),
                                                                                 MenuScreenItem("Set Date", g_set_date_screen),
-                                                                                MenuScreenItem("Set Face", g_set_date_screen),
+                                                                                MenuScreenItem("Set Face", g_set_face_screen),
                                                                                 MenuScreenItem("SW Update", g_enable_debug)}));
+
+static MenuScreen g_apps_menu_screen(g_display,
+                                     g_screen_manager,
+                                     "Apps",
+                                     std::initializer_list<MenuScreenItem>({MenuScreenItem("Stopwatch", g_stopwatch_screen)}));
+
+
 static MenuScreen g_main_menu_screen(g_display,
                                      g_screen_manager,
                                      "Main Menu",
-                                     std::initializer_list<MenuScreenItem>({MenuScreenItem("Apps", g_settings_menu_screen),
+                                     std::initializer_list<MenuScreenItem>({MenuScreenItem("Apps", g_apps_menu_screen),
                                                                             MenuScreenItem("Settings", g_settings_menu_screen)}));
 
-static AnalogTimeScreen g_display_time_screen(g_display, g_screen_manager, g_main_menu_screen);
+static AnalogTimeScreen g_analog_time_screen(g_display, g_screen_manager, g_main_menu_screen);
+static BigDigitalTimeScreen g_digital_time_screen(g_display, g_screen_manager, g_main_menu_screen);
 
 extern "C" void __cxa_pure_virtual() { while(1) {} }
 
@@ -206,7 +221,12 @@ static void _init(void)
     g_btn_manager.init();
     g_display.init();
     g_screen_manager.init();
-    g_screen_manager.set_root_screen(g_display_time_screen);
+    g_screen_manager.set_root_screen(g_analog_time_screen);
+
+    g_set_face_screen.add_item(MenuScreenItem("Analog",
+                                              []() { g_screen_manager.set_root_screen(g_analog_time_screen); }));
+    g_set_face_screen.add_item(MenuScreenItem("Digital",
+                                              []() { g_screen_manager.set_root_screen(g_digital_time_screen); }));
 
     // Enqueue each of the tasks
     BSP::Schedule::NextTime asap = BSP::Schedule::NextTime::asap();