Touch and display driver subsystems reworked (and more) (#302)

- Refactored `TouchDevice`: it can now start/stop LVGL separately, and it has an optional `TouchDriver` interface
- Refactored `DisplayDevice`: it can now start/stop LVGL separately, and it has an optional `DisplayDriver` interface
- Updated all boards and drivers for above changes
- LVGL can now be stopped and (re)started on the fly
- Fixed issues with restarting Gui and Statusbar services
- Refactored `Gui` service to be class and renamed `Gui` to `GuiService`
- Fixed `Statusbar` service: forgot to deregister one of the icons
- Updated `esp_lcd_st7701` to v1.1.3
- `lv_textarea_create()` now automatically registers the hardware keyboard hooks (by wrapping the function)
- Fixed and updated `tactility.py`
- Cleanup of a lot of code
- `BootInitLvglBegin` and `BootInitLvglEnd` are replaced by `LvglStarted` and `LvglStopped`.
- Introduced `tt::service::State` which is accessible via `tt::service::getState()` (and internally via `ServiceInstance`)
- Started replacing `#define TAG` with `constexpr auto TAG = "..";`

Boards/UnPhone/Source/hal/UnPhoneDisplay.h

@@ -3,13 +3,24 @@
 #include "Tactility/hal/display/DisplayDevice.h"
 #include <esp_lcd_types.h>
 #include <lvgl.h>
+#include <Tactility/hal/display/DisplayDriver.h>
+
+#include "UnPhoneDisplayConstants.h"
 
 class UnPhoneDisplay : public tt::hal::display::DisplayDevice {
 
-private:
+    uint8_t* _Nullable buffer = nullptr;
+    lv_display_t* _Nullable lvglDisplay = nullptr;
+    std::shared_ptr<tt::hal::touch::TouchDevice> _Nullable touchDevice;
+    std::shared_ptr<tt::hal::display::DisplayDriver> _Nullable nativeDisplay;
 
-    lv_display_t* displayHandle = nullptr;
-    uint8_t* buffer = nullptr;
+
+    class UnPhoneDisplayDriver : public tt::hal::display::DisplayDriver {
+        tt::hal::display::ColorFormat getColorFormat() const override { return tt::hal::display::ColorFormat::RGB888; }
+        uint16_t getPixelWidth() const override { return UNPHONE_LCD_HORIZONTAL_RESOLUTION; }
+        uint16_t getPixelHeight() const override { return UNPHONE_LCD_VERTICAL_RESOLUTION; }
+        bool drawBitmap(int xStart, int yStart, int xEnd, int yEnd, const void* pixelData) override;
+    };
 
 public:
 
@@ -20,9 +31,26 @@ public:
 
     bool stop() override;
 
-    std::shared_ptr<tt::hal::touch::TouchDevice> _Nullable createTouch() override;
+    bool supportsLvgl() const override { return true; }
 
-    lv_display_t* _Nullable getLvglDisplay() const override { return displayHandle; }
+    bool startLvgl() override;
+
+    bool stopLvgl() override;
+
+    std::shared_ptr<tt::hal::touch::TouchDevice> _Nullable getTouchDevice() override;
+
+    lv_display_t* _Nullable getLvglDisplay() const override { return lvglDisplay; }
+
+    // TODO: Set to true after fixing UnPhoneDisplayDriver
+    bool supportsDisplayDriver() const override { return false; }
+
+    std::shared_ptr<tt::hal::display::DisplayDriver> _Nullable getDisplayDriver() override {
+        if (nativeDisplay == nullptr) {
+            nativeDisplay = std::make_shared<UnPhoneDisplayDriver>();
+        }
+        assert(nativeDisplay != nullptr);
+        return nativeDisplay;
+    }
 };
 
 std::shared_ptr<tt::hal::display::DisplayDevice> createDisplay();