Timer App (#355)

* built timer app

* Style improvements

* making sure buttons stay hidden when the app is reopened and reappear after the timer runs out

* more sensible calculations of time deltas. eliminated that mysterious scaling factor

* changing the timer icon

16 files changed, 385 insertions, 22 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index acbfba18..7ccd4ce7 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -407,6 +407,7 @@ list(APPEND SOURCE_FILES
         displayapp/screens/List.cpp
         displayapp/screens/BatteryInfo.cpp
         displayapp/screens/Steps.cpp
+        displayapp/screens/Timer.cpp
 
         ## Settings
         displayapp/screens/settings/QuickSettings.cpp
@@ -459,6 +460,7 @@ list(APPEND SOURCE_FILES
         components/firmwarevalidator/FirmwareValidator.cpp
         components/motor/MotorController.cpp
         components/settings/Settings.cpp
+        components/timer/TimerController.cpp
         drivers/Cst816s.cpp
         FreeRTOS/port.c
         FreeRTOS/port_cmsis_systick.c
@@ -520,6 +522,7 @@ list(APPEND RECOVERY_SOURCE_FILES
         components/ble/HeartRateService.cpp
         components/firmwarevalidator/FirmwareValidator.cpp
         components/settings/Settings.cpp
+        components/timer/TimerController.cpp
         drivers/Cst816s.cpp
         FreeRTOS/port.c
         FreeRTOS/port_cmsis_systick.c
@@ -590,6 +593,7 @@ set(INCLUDE_FILES
         displayapp/screens/Notifications.h
         displayapp/screens/HeartRate.h
         displayapp/screens/Motion.h
+        displayapp/screens/Timer.h
         drivers/St7789.h
         drivers/SpiNorFlash.h
         drivers/SpiMaster.h
@@ -619,6 +623,7 @@ set(INCLUDE_FILES
         components/ble/BleClient.h
         components/ble/HeartRateService.h
         components/settings/Settings.h
+        components/timer/TimerController.h
         drivers/Cst816s.h
         FreeRTOS/portmacro.h
         FreeRTOS/portmacro_cmsis.h
diff --git a/src/components/motor/MotorController.cpp b/src/components/motor/MotorController.cpp
index a834ab6b..3afa0ced 100644
--- a/src/components/motor/MotorController.cpp
+++ b/src/components/motor/MotorController.cpp
@@ -13,7 +13,6 @@ MotorController::MotorController(Controllers::Settings& settingsController) : se
 void MotorController::Init() {
   nrf_gpio_cfg_output(pinMotor);
   nrf_gpio_pin_set(pinMotor);
-  app_timer_init();
   app_timer_create(&vibTimer, APP_TIMER_MODE_SINGLE_SHOT, vibrate);
 }
 
diff --git a/src/components/timer/TimerController.cpp b/src/components/timer/TimerController.cpp
new file mode 100644
index 00000000..3b25901c
--- /dev/null
+++ b/src/components/timer/TimerController.cpp
@@ -0,0 +1,64 @@
+//
+// Created by florian on 16.05.21.
+//
+
+#include "TimerController.h"
+#include "systemtask/SystemTask.h"
+#include "app_timer.h"
+#include "task.h"
+
+using namespace Pinetime::Controllers;
+
+
+APP_TIMER_DEF(timerAppTimer);
+
+
+TimerController::TimerController(System::SystemTask& systemTask) : systemTask{systemTask} {
+}
+
+
+void TimerController::Init() {
+  app_timer_create(&timerAppTimer, APP_TIMER_MODE_SINGLE_SHOT, timerEnd);
+  
+}
+
+void TimerController::StartTimer(uint32_t duration) {
+  app_timer_stop(timerAppTimer);
+  auto currentTicks = xTaskGetTickCount();
+  app_timer_start(timerAppTimer, APP_TIMER_TICKS(duration), this);
+  endTicks = currentTicks + APP_TIMER_TICKS(duration);
+  timerRunning = true;
+}
+
+uint32_t TimerController::GetTimeRemaining() {
+  if (!timerRunning) {
+    return 0;
+  }
+  auto currentTicks = xTaskGetTickCount();
+  
+  TickType_t deltaTicks = 0;
+  if (currentTicks > endTicks) {
+    deltaTicks = 0xffffffff - currentTicks;
+    deltaTicks += (endTicks + 1);
+  } else {
+    deltaTicks = endTicks - currentTicks;
+  }
+  
+  return (static_cast<TickType_t>(deltaTicks) / static_cast<TickType_t>(configTICK_RATE_HZ)) * 1000;
+}
+
+void TimerController::timerEnd(void* p_context) {
+  
+  auto* controller = static_cast<Controllers::TimerController*> (p_context);
+  controller->timerRunning = false;
+  controller->systemTask.PushMessage(System::SystemTask::Messages::OnTimerDone);
+}
+
+void TimerController::StopTimer() {
+  app_timer_stop(timerAppTimer);
+  timerRunning = false;
+}
+
+bool TimerController::IsRunning() {
+  return timerRunning;
+}
\ No newline at end of file
diff --git a/src/components/timer/TimerController.h b/src/components/timer/TimerController.h
new file mode 100644
index 00000000..5a0b293e
--- /dev/null
+++ b/src/components/timer/TimerController.h
@@ -0,0 +1,36 @@
+#pragma once
+
+#include <cstdint>
+#include "app_timer.h"
+#include "portmacro_cmsis.h"
+
+namespace Pinetime {
+  namespace System {
+    class SystemTask;
+  }
+  namespace Controllers {
+    
+    class TimerController {
+    public:
+      TimerController(Pinetime::System::SystemTask& systemTask);
+      
+      void Init();
+      
+      void StartTimer(uint32_t duration);
+      
+      void StopTimer();
+      
+      uint32_t GetTimeRemaining();
+      
+      bool IsRunning();
+    
+    private:
+      System::SystemTask& systemTask;
+      
+      static void timerEnd(void* p_context);
+  
+      TickType_t endTicks;
+      bool timerRunning = false;
+    };
+  }
+}
\ No newline at end of file
diff --git a/src/displayapp/Apps.h b/src/displayapp/Apps.h
index 09a20181..2df517f8 100644
--- a/src/displayapp/Apps.h
+++ b/src/displayapp/Apps.h
@@ -11,6 +11,7 @@ namespace Pinetime {
       FirmwareValidation,
       NotificationsPreview,
       Notifications,
+      Timer,
       FlashLight,
       BatteryInfo,
       Music,
diff --git a/src/displayapp/DisplayApp.cpp b/src/displayapp/DisplayApp.cpp
index a6c4a3ec..419b9f6f 100644
--- a/src/displayapp/DisplayApp.cpp
+++ b/src/displayapp/DisplayApp.cpp
@@ -2,6 +2,7 @@
 #include <libraries/log/nrf_log.h>
 #include <displayapp/screens/HeartRate.h>
 #include <displayapp/screens/Motion.h>
+#include <displayapp/screens/Timer.h>
 #include "components/battery/BatteryController.h"
 #include "components/ble/BleController.h"
 #include "components/datetime/DateTimeController.h"
@@ -55,7 +56,8 @@ DisplayApp::DisplayApp(Drivers::St7789& lcd,
                        Pinetime::Controllers::HeartRateController& heartRateController,
                        Controllers::Settings& settingsController,
                        Pinetime::Controllers::MotorController& motorController,
-                       Pinetime::Controllers::MotionController& motionController)
+                       Pinetime::Controllers::MotionController& motionController,
+                       Pinetime::Controllers::TimerController& timerController)
   : lcd {lcd},
     lvgl {lvgl},
     touchPanel {touchPanel},
@@ -68,7 +70,8 @@ DisplayApp::DisplayApp(Drivers::St7789& lcd,
     heartRateController {heartRateController},
     settingsController {settingsController},
     motorController {motorController},
-    motionController {motionController} {
+    motionController {motionController},
+    timerController {timerController} {
   msgQueue = xQueueCreate(queueSize, itemSize);
   // Start clock when smartwatch boots
   LoadApp(Apps::Clock, DisplayApp::FullRefreshDirections::None);
@@ -148,6 +151,14 @@ void DisplayApp::Refresh() {
       case Messages::NewNotification:
         LoadApp(Apps::NotificationsPreview, DisplayApp::FullRefreshDirections::Down);
         break;
+      case Messages::TimerDone:
+        if (currentApp == Apps::Timer) {
+          auto *timer = dynamic_cast<Screens::Timer*>(currentScreen.get());
+          timer->setDone();
+        } else {
+          LoadApp(Apps::Timer, DisplayApp::FullRefreshDirections::Down);
+        }
+        break;
       case Messages::TouchEvent: {
         if (state != States::Running)
           break;
@@ -264,6 +275,9 @@ void DisplayApp::LoadApp(Apps app, DisplayApp::FullRefreshDirections direction)
         this, notificationManager, systemTask.nimble().alertService(), Screens::Notifications::Modes::Preview);
       ReturnApp(Apps::Clock, FullRefreshDirections::Up, TouchEvents::SwipeUp);
       break;
+    case Apps::Timer:
+      currentScreen = std::make_unique<Screens::Timer>(this, timerController);
+      break;
 
     // Settings
     case Apps::QuickSettings:
diff --git a/src/displayapp/DisplayApp.h b/src/displayapp/DisplayApp.h
index ffe27cf1..0c7bd216 100644
--- a/src/displayapp/DisplayApp.h
+++ b/src/displayapp/DisplayApp.h
@@ -12,6 +12,7 @@
 #include "components/firmwarevalidator/FirmwareValidator.h"
 #include "components/settings/Settings.h"
 #include "displayapp/screens/Screen.h"
+#include "components/timer/TimerController.h"
 #include "Messages.h"
 
 namespace Pinetime {
@@ -53,7 +54,8 @@ namespace Pinetime {
                  Pinetime::Controllers::HeartRateController& heartRateController,
                  Controllers::Settings& settingsController,
                  Pinetime::Controllers::MotorController& motorController,
-                 Pinetime::Controllers::MotionController& motionController);
+                 Pinetime::Controllers::MotionController& motionController,
+                 Pinetime::Controllers::TimerController& timerController);
       void Start();
       void PushMessage(Display::Messages msg);
 
@@ -76,6 +78,7 @@ namespace Pinetime {
       Pinetime::Controllers::Settings& settingsController;
       Pinetime::Controllers::MotorController& motorController;
       Pinetime::Controllers::MotionController& motionController;
+      Pinetime::Controllers::TimerController& timerController;
 
       Pinetime::Controllers::FirmwareValidator validator;
       Controllers::BrightnessController brightnessController;
diff --git a/src/displayapp/Messages.h b/src/displayapp/Messages.h
index 81871c54..ce65f846 100644
--- a/src/displayapp/Messages.h
+++ b/src/displayapp/Messages.h
@@ -11,6 +11,7 @@ namespace Pinetime {
         TouchEvent,
         ButtonPushed,
         NewNotification,
+        TimerDone,
         BleFirmwareUpdateStarted,
         UpdateTimeOut
       };
diff --git a/src/displayapp/fonts/README.md b/src/displayapp/fonts/README.md
index f43e9c52..183ad7e4 100644
--- a/src/displayapp/fonts/README.md
+++ b/src/displayapp/fonts/README.md
@@ -12,7 +12,7 @@
 * Do not enable font compression and horizontal subpixel hinting
 * Load the file `JetBrainsMono-Bold.tff` and specify the following range : `0x20-0x7f, 0x410-0x44f`
 * Add a 2nd font, load the file `FontAwesome5-Solid+Brands+Regular.woff` and specify the following
-  range : `0xf293, 0xf294, 0xf244, 0xf240, 0xf242, 0xf243, 0xf241, 0xf54b, 0xf21e, 0xf1e6, 0xf54b, 0xf017, 0xf129, 0xf03a, 0xf185, 0xf560, 0xf001, 0xf3fd, 0xf069, 0xf1fc, 0xf45d, 0xf59f, 0xf5a0, 0xf029, 0xf027, 0xf028, 0xf6a9, 0xf04b, 0xf04c, 0xf048, 0xf051, 0xf095, 0xf3dd, 0xf04d, 0xf2f2, 0xf024`
+  range : `0xf293, 0xf294, 0xf244, 0xf240, 0xf242, 0xf243, 0xf241, 0xf54b, 0xf21e, 0xf1e6, 0xf54b, 0xf017, 0xf129, 0xf03a, 0xf185, 0xf560, 0xf001, 0xf3fd, 0xf069, 0xf1fc, 0xf45d, 0xf59f, 0xf5a0, 0xf029, 0xf027, 0xf028, 0xf6a9, 0xf04b, 0xf04c, 0xf048, 0xf051, 0xf095, 0xf3dd, 0xf04d, 0xf2f2, 0xf024, 0xf252`
 * Click on Convert, and download the file `jetbrains_mono_bold_20.c` and copy it in `src/DisplayApp/Fonts`
 
 Add new symbols:
diff --git a/src/displayapp/fonts/jetbrains_mono_bold_20.c b/src/displayapp/fonts/jetbrains_mono_bold_20.c
index f4050db8..9174ff48 100644
--- a/src/displayapp/fonts/jetbrains_mono_bold_20.c
+++ b/src/displayapp/fonts/jetbrains_mono_bold_20.c
@@ -900,6 +900,13 @@ static LV_ATTRIBUTE_LARGE_CONST const uint8_t gylph_bitmap[] = {
     0x7, 0xe0, 0x0, 0x7, 0xf0, 0x0, 0x3, 0xff,
     0xff, 0xff, 0xcf, 0xff, 0xff, 0xe0,
 
+    /* U+F252 "" */
+    0xff, 0xff, 0xff, 0xfd, 0x80, 0x33, 0x80, 0xe7,
+    0xff, 0xc7, 0xff, 0xf, 0xfe, 0xf, 0xf8, 0xf,
+    0xe0, 0xf, 0x80, 0x7f, 0xc0, 0xe3, 0x83, 0x83,
+    0x86, 0x3, 0x1f, 0xff, 0x3f, 0xfe, 0x7f, 0xfd,
+    0xff, 0xff, 0xff, 0xf8,
+
     /* U+F293 "" */
     0x7, 0xe0, 0x3f, 0xe0, 0xfb, 0xe3, 0xf3, 0xe7,
     0xe3, 0xdf, 0xd3, 0xf9, 0xb3, 0xf9, 0x4f, 0xf8,
@@ -1184,17 +1191,18 @@ static const lv_font_fmt_txt_glyph_dsc_t glyph_dsc[] = {
     {.bitmap_index = 3380, .adv_w = 400, .box_w = 25, .box_h = 12, .ofs_x = 0, .ofs_y = 1},
     {.bitmap_index = 3418, .adv_w = 400, .box_w = 25, .box_h = 12, .ofs_x = 0, .ofs_y = 1},
     {.bitmap_index = 3456, .adv_w = 400, .box_w = 25, .box_h = 12, .ofs_x = 0, .ofs_y = 1},
-    {.bitmap_index = 3494, .adv_w = 280, .box_w = 15, .box_h = 20, .ofs_x = 1, .ofs_y = -3},
-    {.bitmap_index = 3532, .adv_w = 200, .box_w = 11, .box_h = 21, .ofs_x = 0, .ofs_y = -3},
-    {.bitmap_index = 3561, .adv_w = 280, .box_w = 16, .box_h = 19, .ofs_x = 1, .ofs_y = -2},
-    {.bitmap_index = 3599, .adv_w = 400, .box_w = 25, .box_h = 21, .ofs_x = 0, .ofs_y = -3},
-    {.bitmap_index = 3665, .adv_w = 360, .box_w = 23, .box_h = 17, .ofs_x = 0, .ofs_y = -1},
-    {.bitmap_index = 3714, .adv_w = 320, .box_w = 20, .box_h = 20, .ofs_x = 0, .ofs_y = -2},
-    {.bitmap_index = 3764, .adv_w = 400, .box_w = 25, .box_h = 19, .ofs_x = 0, .ofs_y = -2},
-    {.bitmap_index = 3824, .adv_w = 320, .box_w = 20, .box_h = 21, .ofs_x = 0, .ofs_y = -3},
-    {.bitmap_index = 3877, .adv_w = 360, .box_w = 22, .box_h = 20, .ofs_x = 0, .ofs_y = -2},
-    {.bitmap_index = 3932, .adv_w = 360, .box_w = 22, .box_h = 19, .ofs_x = 0, .ofs_y = -2},
-    {.bitmap_index = 3985, .adv_w = 320, .box_w = 20, .box_h = 15, .ofs_x = 0, .ofs_y = 0}
+    {.bitmap_index = 3494, .adv_w = 240, .box_w = 15, .box_h = 19, .ofs_x = 0, .ofs_y = -2},
+    {.bitmap_index = 3530, .adv_w = 280, .box_w = 15, .box_h = 20, .ofs_x = 1, .ofs_y = -3},
+    {.bitmap_index = 3568, .adv_w = 200, .box_w = 11, .box_h = 21, .ofs_x = 0, .ofs_y = -3},
+    {.bitmap_index = 3597, .adv_w = 280, .box_w = 16, .box_h = 19, .ofs_x = 1, .ofs_y = -2},
+    {.bitmap_index = 3635, .adv_w = 400, .box_w = 25, .box_h = 21, .ofs_x = 0, .ofs_y = -3},
+    {.bitmap_index = 3701, .adv_w = 360, .box_w = 23, .box_h = 17, .ofs_x = 0, .ofs_y = -1},
+    {.bitmap_index = 3750, .adv_w = 320, .box_w = 20, .box_h = 20, .ofs_x = 0, .ofs_y = -2},
+    {.bitmap_index = 3800, .adv_w = 400, .box_w = 25, .box_h = 19, .ofs_x = 0, .ofs_y = -2},
+    {.bitmap_index = 3860, .adv_w = 320, .box_w = 20, .box_h = 21, .ofs_x = 0, .ofs_y = -3},
+    {.bitmap_index = 3913, .adv_w = 360, .box_w = 22, .box_h = 20, .ofs_x = 0, .ofs_y = -2},
+    {.bitmap_index = 3968, .adv_w = 360, .box_w = 22, .box_h = 19, .ofs_x = 0, .ofs_y = -2},
+    {.bitmap_index = 4021, .adv_w = 320, .box_w = 20, .box_h = 15, .ofs_x = 0, .ofs_y = 0}
 };
 
 /*---------------------
@@ -1205,8 +1213,8 @@ static const uint16_t unicode_list_2[] = {
     0x0, 0x16, 0x23, 0x26, 0x27, 0x28, 0x39, 0x47,
     0x4a, 0x4b, 0x4c, 0x50, 0x68, 0x94, 0x128, 0x184,
     0x1e5, 0x1fb, 0x21d, 0x23f, 0x240, 0x241, 0x242, 0x243,
-    0x292, 0x293, 0x2f1, 0x3dc, 0x3fc, 0x45c, 0x54a, 0x55f,
-    0x59e, 0x59f, 0x6a8
+    0x251, 0x292, 0x293, 0x2f1, 0x3dc, 0x3fc, 0x45c, 0x54a,
+    0x55f, 0x59e, 0x59f, 0x6a8
 };
 
 /*Collect the unicode lists and glyph_id offsets*/
@@ -1222,7 +1230,7 @@ static const lv_font_fmt_txt_cmap_t cmaps[] =
     },
     {
         .range_start = 61441, .range_length = 1705, .glyph_id_start = 160,
-        .unicode_list = unicode_list_2, .glyph_id_ofs_list = NULL, .list_length = 35, .type = LV_FONT_FMT_TXT_CMAP_SPARSE_TINY
+        .unicode_list = unicode_list_2, .glyph_id_ofs_list = NULL, .list_length = 36, .type = LV_FONT_FMT_TXT_CMAP_SPARSE_TINY
     }
 };
 
diff --git a/src/displayapp/screens/ApplicationList.cpp b/src/displayapp/screens/ApplicationList.cpp
index 1eb36999..d599f5cc 100644
--- a/src/displayapp/screens/ApplicationList.cpp
+++ b/src/displayapp/screens/ApplicationList.cpp
@@ -51,7 +51,7 @@ std::unique_ptr<Screen> ApplicationList::CreateScreen1() {
     {Symbols::map, Apps::Navigation},
     {Symbols::shoe, Apps::Steps},
     {Symbols::heartBeat, Apps::HeartRate},
-    {"", Apps::None},
+    {Symbols::hourGlass, Apps::Timer},
   }};
 
   return std::make_unique<Screens::Tile>(0, 2, app, settingsController, batteryController, dateTimeController, applications);
diff --git a/src/displayapp/screens/Symbols.h b/src/displayapp/screens/Symbols.h
index e60825c1..8d55f693 100644
--- a/src/displayapp/screens/Symbols.h
+++ b/src/displayapp/screens/Symbols.h
@@ -38,6 +38,7 @@ namespace Pinetime {
         static constexpr const char* pause = "\xEF\x81\x8C";
         static constexpr const char* stop = "\xEF\x81\x8D";
         static constexpr const char* stopWatch = "\xEF\x8B\xB2";
+        static constexpr const char* hourGlass = "\xEF\x89\x92";
         static constexpr const char* lapsFlag = "\xEF\x80\xA4";
 
         // lv_font_sys_48.c
diff --git a/src/displayapp/screens/Timer.cpp b/src/displayapp/screens/Timer.cpp
new file mode 100644
index 00000000..260a17ef
--- /dev/null
+++ b/src/displayapp/screens/Timer.cpp
@@ -0,0 +1,173 @@
+#include "Timer.h"
+
+#include "Screen.h"
+#include "Symbols.h"
+#include "lvgl/lvgl.h"
+
+
+using namespace Pinetime::Applications::Screens;
+
+
+static void btnEventHandler(lv_obj_t* obj, lv_event_t event) {
+  Timer* screen = static_cast<Timer*>(obj->user_data);
+  screen->OnButtonEvent(obj, event);
+}
+
+void Timer::createButtons() {
+  btnMinutesUp = lv_btn_create(lv_scr_act(), nullptr);
+  btnMinutesUp->user_data = this;
+  lv_obj_set_event_cb(btnMinutesUp, btnEventHandler);
+  lv_obj_align(btnMinutesUp, lv_scr_act(), LV_ALIGN_IN_LEFT_MID, 20, -80);
+  lv_obj_set_height(btnMinutesUp, 40);
+  lv_obj_set_width(btnMinutesUp, 60);
+  txtMUp = lv_label_create(btnMinutesUp, nullptr);
+  lv_label_set_text(txtMUp, "+");
+  
+  btnMinutesDown = lv_btn_create(lv_scr_act(), nullptr);
+  btnMinutesDown->user_data = this;
+  lv_obj_set_event_cb(btnMinutesDown, btnEventHandler);
+  lv_obj_align(btnMinutesDown, lv_scr_act(), LV_ALIGN_IN_LEFT_MID, 20, +40);
+  lv_obj_set_height(btnMinutesDown, 40);
+  lv_obj_set_width(btnMinutesDown, 60);
+  txtMDown = lv_label_create(btnMinutesDown, nullptr);
+  lv_label_set_text(txtMDown, "-");
+  
+  btnSecondsUp = lv_btn_create(lv_scr_act(), nullptr);
+  btnSecondsUp->user_data = this;
+  lv_obj_set_event_cb(btnSecondsUp, btnEventHandler);
+  lv_obj_align(btnSecondsUp, lv_scr_act(), LV_ALIGN_IN_RIGHT_MID, 10, -80);
+  lv_obj_set_height(btnSecondsUp, 40);
+  lv_obj_set_width(btnSecondsUp, 60);
+  txtSUp = lv_label_create(btnSecondsUp, nullptr);
+  lv_label_set_text(txtSUp, "+");
+  
+  btnSecondsDown = lv_btn_create(lv_scr_act(), nullptr);
+  btnSecondsDown->user_data = this;
+  lv_obj_set_event_cb(btnSecondsDown, btnEventHandler);
+  lv_obj_align(btnSecondsDown, lv_scr_act(), LV_ALIGN_IN_RIGHT_MID, 10, +40);
+  lv_obj_set_height(btnSecondsDown, 40);
+  lv_obj_set_width(btnSecondsDown, 60);
+  txtSDown = lv_label_create(btnSecondsDown, nullptr);
+  lv_label_set_text(txtSDown, "-");
+  
+}
+
+
+Timer::Timer(DisplayApp* app, Controllers::TimerController& timerController)
+    : Screen(app),
+      running{true},
+      timerController{timerController} {
+  
+  time = lv_label_create(lv_scr_act(), nullptr);
+  lv_obj_set_style_local_text_font(time, LV_LABEL_PART_MAIN, LV_STATE_DEFAULT, &jetbrains_mono_76);
+  lv_obj_set_style_local_text_color(time, LV_LABEL_PART_MAIN, LV_STATE_DEFAULT, LV_COLOR_GRAY);
+  
+  uint32_t seconds = timerController.GetTimeRemaining() / 1000;
+  lv_label_set_text_fmt(time, "%02d:%02d", seconds / 60, seconds % 60);
+  
+  lv_obj_align(time, lv_scr_act(), LV_ALIGN_IN_LEFT_MID, 0, -20);
+  
+  btnPlayPause = lv_btn_create(lv_scr_act(), nullptr);
+  btnPlayPause->user_data = this;
+  lv_obj_set_event_cb(btnPlayPause, btnEventHandler);
+  lv_obj_align(btnPlayPause, lv_scr_act(), LV_ALIGN_IN_BOTTOM_MID, 0, -10);
+  lv_obj_set_height(btnPlayPause, 40);
+  txtPlayPause = lv_label_create(btnPlayPause, nullptr);
+  if (timerController.IsRunning()) {
+    lv_label_set_text(txtPlayPause, Symbols::pause);
+  } else {
+    lv_label_set_text(txtPlayPause, Symbols::play);
+    createButtons();
+  }
+  
+}
+
+Timer::~Timer() {
+  lv_obj_clean(lv_scr_act());
+  
+}
+
+bool Timer::Refresh() {
+  if (timerController.IsRunning()) {
+    uint32_t seconds = timerController.GetTimeRemaining() / 1000;
+    lv_label_set_text_fmt(time, "%02d:%02d", seconds / 60, seconds % 60);
+  }
+  return running;
+}
+
+void Timer::OnButtonEvent(lv_obj_t* obj, lv_event_t event) {
+  if (event == LV_EVENT_CLICKED) {
+    if (obj == btnPlayPause) {
+      if (timerController.IsRunning()) {
+        lv_label_set_text(txtPlayPause, Symbols::play);
+        uint32_t seconds = timerController.GetTimeRemaining() / 1000;
+        minutesToSet = seconds / 60;
+        secondsToSet = seconds % 60;
+        timerController.StopTimer();
+        createButtons();
+        
+      } else if (secondsToSet + minutesToSet > 0) {
+        lv_label_set_text(txtPlayPause, Symbols::pause);
+        timerController.StartTimer((secondsToSet + minutesToSet * 60) * 1000);
+        
+        lv_obj_del(btnSecondsDown);
+        btnSecondsDown = nullptr;
+        lv_obj_del(btnSecondsUp);
+        btnSecondsUp = nullptr;
+        lv_obj_del(btnMinutesDown);
+        btnMinutesDown = nullptr;
+        lv_obj_del(btnMinutesUp);
+        btnMinutesUp = nullptr;
+        
+      }
+    } else {
+      if (!timerController.IsRunning()) {
+        if (obj == btnMinutesUp) {
+          if (minutesToSet >= 59) {
+            minutesToSet = 0;
+          } else {
+            minutesToSet++;
+          }
+          lv_label_set_text_fmt(time, "%02d:%02d", minutesToSet, secondsToSet);
+          
+        } else if (obj == btnMinutesDown) {
+          if (minutesToSet == 0) {
+            minutesToSet = 59;
+          } else {
+            minutesToSet--;
+          }
+          lv_label_set_text_fmt(time, "%02d:%02d", minutesToSet, secondsToSet);
+          
+        } else if (obj == btnSecondsUp) {
+          if (secondsToSet >= 59) {
+            secondsToSet = 0;
+          } else {
+            secondsToSet++;
+          }
+          lv_label_set_text_fmt(time, "%02d:%02d", minutesToSet, secondsToSet);
+          
+        } else if (obj == btnSecondsDown) {
+          if (secondsToSet == 0) {
+            secondsToSet = 59;
+          } else {
+            secondsToSet--;
+          }
+          lv_label_set_text_fmt(time, "%02d:%02d", minutesToSet, secondsToSet);
+          
+        }
+      }
+      
+    }
+    
+  }
+  
+}
+
+
+void Timer::setDone() {
+  lv_label_set_text(time, "00:00");
+  lv_label_set_text(txtPlayPause, Symbols::play);
+  secondsToSet = 0;
+  minutesToSet = 0;
+  createButtons();
+}
\ No newline at end of file
diff --git a/src/displayapp/screens/Timer.h b/src/displayapp/screens/Timer.h
new file mode 100644
index 00000000..0d66f2d4
--- /dev/null
+++ b/src/displayapp/screens/Timer.h
@@ -0,0 +1,42 @@
+#pragma once
+
+#include "Screen.h"
+#include "components/datetime/DateTimeController.h"
+#include "systemtask/SystemTask.h"
+#include "../LittleVgl.h"
+
+#include "components/timer/TimerController.h"
+
+namespace Pinetime::Applications::Screens {
+  
+  
+  class Timer : public Screen {
+  public:
+    
+    enum class Modes {
+      Normal, Done
+    };
+    
+    Timer(DisplayApp* app, Controllers::TimerController& timerController);
+    
+    ~Timer() override;
+    
+    bool Refresh() override;
+    
+    void setDone();
+    
+    void OnButtonEvent(lv_obj_t* obj, lv_event_t event);
+  
+  private:
+    
+    bool running;
+    uint8_t secondsToSet = 0;
+    uint8_t minutesToSet = 0;
+    Controllers::TimerController& timerController;
+    
+    void createButtons();
+    
+    lv_obj_t* time, * msecTime, * btnPlayPause, * txtPlayPause, * btnMinutesUp, * btnMinutesDown, * btnSecondsUp, * btnSecondsDown, * txtMUp,
+        * txtMDown, * txtSUp, * txtSDown;
+  };
+}
\ No newline at end of file
diff --git a/src/systemtask/SystemTask.cpp b/src/systemtask/SystemTask.cpp
index 80f4d5db..58377764 100644
--- a/src/systemtask/SystemTask.cpp
+++ b/src/systemtask/SystemTask.cpp
@@ -56,6 +56,7 @@ SystemTask::SystemTask(Drivers::SpiMaster& spi,
     heartRateController {*this},
     bleController {bleController},
     dateTimeController {*this},
+    timerController {*this},
     watchdog {},
     watchdogView {watchdog},
     motorController {motorController},
@@ -83,6 +84,8 @@ void SystemTask::Work() {
   NRF_LOG_INFO("Last reset reason : %s", Pinetime::Drivers::Watchdog::ResetReasonToString(watchdog.ResetReason()));
   APP_GPIOTE_INIT(2);
 
+  app_timer_init();
+  
   spi.Init();
   spiNorFlash.Init();
   spiNorFlash.Wakeup();
@@ -96,6 +99,7 @@ void SystemTask::Work() {
   batteryController.Init();
   motorController.Init();
   motionSensor.SoftReset();
+  timerController.Init();
 
   // Reset the TWI device because the motion sensor chip most probably crashed it...
   twiMaster.Sleep();
@@ -116,7 +120,8 @@ void SystemTask::Work() {
                                                                     heartRateController,
                                                                     settingsController,
                                                                     motorController,
-                                                                    motionController);
+                                                                    motionController,
+                                                                    timerController);
   displayApp->Start();
 
   displayApp->PushMessage(Pinetime::Applications::Display::Messages::UpdateBatteryLevel);
@@ -233,11 +238,19 @@ void SystemTask::Work() {
           displayApp->PushMessage(Pinetime::Applications::Display::Messages::UpdateDateTime);
           break;
         case Messages::OnNewNotification:
-          if (isSleeping && !isWakingUp)
+          if (isSleeping && !isWakingUp) {
             GoToRunning();
+          }
           motorController.SetDuration(35);
           displayApp->PushMessage(Pinetime::Applications::Display::Messages::NewNotification);
           break;
+        case Messages::OnTimerDone:
+          if (isSleeping && !isWakingUp) {
+            GoToRunning();
+          }
+          motorController.SetDuration(35);
+          displayApp->PushMessage(Pinetime::Applications::Display::Messages::TimerDone);
+          break;
         case Messages::BleConnected:
           ReloadIdleTimer();
           isBleDiscoveryTimerRunning = true;
diff --git a/src/systemtask/SystemTask.h b/src/systemtask/SystemTask.h
index 52e71b17..ea41a69d 100644
--- a/src/systemtask/SystemTask.h
+++ b/src/systemtask/SystemTask.h
@@ -16,6 +16,7 @@
 #include "components/ble/NimbleController.h"
 #include "components/ble/NotificationManager.h"
 #include "components/motor/MotorController.h"
+#include "components/timer/TimerController.h"
 #ifdef PINETIME_IS_RECOVERY
   #include "displayapp/DisplayAppRecovery.h"
   #include "displayapp/DummyLittleVgl.h"
@@ -45,6 +46,7 @@ namespace Pinetime {
         TouchWakeUp,
         OnNewTime,
         OnNewNotification,
+        OnTimerDone,
         OnNewCall,
         BleConnected,
         UpdateTimeOut,
@@ -100,6 +102,7 @@ namespace Pinetime {
 
       Pinetime::Controllers::Ble& bleController;
       Pinetime::Controllers::DateTime dateTimeController;
+      Pinetime::Controllers::TimerController timerController;
       QueueHandle_t systemTasksMsgQueue;
       std::atomic<bool> isSleeping {false};
       std::atomic<bool> isGoingToSleep {false};