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 = "..";`

Drivers/FT6x36/Source/Ft6x36Touch.h

@@ -15,41 +15,78 @@ public:
 
         Configuration(
             i2c_port_t port,
-            gpio_num_t pinInterrupt
+            gpio_num_t pinInterrupt,
+            uint16_t width,
+            uint16_t height
         ) : port(port),
-            pinInterrupt(pinInterrupt)
+            pinInterrupt(pinInterrupt),
+            width(width),
+            height(height)
         {}
 
         i2c_port_t port;
         gpio_num_t pinInterrupt;
-    };
+        uint16_t width;
+        uint16_t height;
+};
 
 private:
 
     std::unique_ptr<Configuration> configuration;
     lv_indev_t* _Nullable deviceHandle = nullptr;
     FT6X36 driver = FT6X36(configuration->port, configuration->pinInterrupt);
-    tt::Thread driverThread;
+    std::shared_ptr<tt::Thread> driverThread;
     bool interruptDriverThread = false;
     tt::Mutex mutex;
+    std::shared_ptr<tt::hal::touch::TouchDriver> nativeTouch;
 
     lv_point_t lastPoint = { .x = 0, .y = 0 };
     lv_indev_state_t lastState = LV_INDEV_STATE_RELEASED;
 
-    bool shouldInterruptDriverThread();
+    bool shouldInterruptDriverThread() const;
+
+    void driverThreadMain();
+
+    static void touchReadCallback(lv_indev_t* indev, lv_indev_data_t* data);
 
 public:
 
     explicit Ft6x36Touch(std::unique_ptr<Configuration> inConfiguration);
-    ~Ft6x36Touch() final;
+    ~Ft6x36Touch() override;
 
-    std::string getName() const final { return "FT6x36"; }
-    std::string getDescription() const final { return "I2C touch driver"; }
+    std::string getName() const override { return "FT6x36"; }
+    std::string getDescription() const override { return "FT6x36 I2C touch driver"; }
 
-    bool start(lv_display_t* display) override;
+    bool start() override;
     bool stop() override;
 
-    void readLast(lv_indev_data_t* data);
+    bool supportsLvgl() const override { return true; }
+    bool startLvgl(lv_display_t* display) override;
+    bool stopLvgl() override;
+
     lv_indev_t* _Nullable getLvglIndev() override { return deviceHandle; }
-    void driverThreadMain();
+
+    class Ft6TouchDriver : public tt::hal::touch::TouchDriver {
+    public:
+        const Ft6x36Touch& parent;
+        Ft6TouchDriver(const Ft6x36Touch& parent) : parent(parent) {}
+
+        bool getTouchedPoints(uint16_t* x, uint16_t* y, uint16_t* _Nullable strength, uint8_t* pointCount, uint8_t maxPointCount) {
+            auto lock = parent.mutex.asScopedLock();
+            lock.lock();
+            if (parent.lastState == LV_INDEV_STATE_PRESSED) {
+                *x = parent.lastPoint.x;
+                *y = parent.lastPoint.y;
+                *pointCount = 1;
+                return true;
+            } else {
+                *pointCount = 0;
+                return false;
+            }
+        }
+    };
+
+    bool supportsTouchDriver() override { return true; }
+
+    std::shared_ptr<tt::hal::touch::TouchDriver> _Nullable getTouchDriver() override { return nativeTouch; }
 };