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/XPT2046/Source/Xpt2046Touch.cpp

@@ -7,19 +7,19 @@
 #include <esp_lcd_touch_xpt2046.h>
 #include <esp_lvgl_port.h>
 
-#define TAG "xpt2046_touch"
-
 Xpt2046Touch* Xpt2046Touch::instance = nullptr;
 
-bool Xpt2046Touch::start(lv_display_t* display) {
+bool Xpt2046Touch::createIoHandle(esp_lcd_panel_io_handle_t& outHandle) {
     const esp_lcd_panel_io_spi_config_t io_config = ESP_LCD_TOUCH_IO_SPI_XPT2046_CONFIG(configuration->spiPinCs);
+    return esp_lcd_new_panel_io_spi(SPI2_HOST, &io_config, &outHandle) == ESP_OK;
+}
 
-    if (esp_lcd_new_panel_io_spi(SPI2_HOST, &io_config, &ioHandle) != ESP_OK) {
-        TT_LOG_E(TAG, "Touch IO SPI creation failed");
-        return false;
-    }
+bool Xpt2046Touch::createTouchHandle(esp_lcd_panel_io_handle_t ioHandle, const esp_lcd_touch_config_t& config, esp_lcd_touch_handle_t& panelHandle) {
+    return esp_lcd_touch_new_spi_xpt2046(ioHandle, &config, &panelHandle) == ESP_OK;
+}
 
-    esp_lcd_touch_config_t config = {
+esp_lcd_touch_config_t Xpt2046Touch::createEspLcdTouchConfig() {
+   return {
         .x_max = configuration->xMax,
         .y_max = configuration->yMax,
         .rst_gpio_num = GPIO_NUM_NC,
@@ -38,61 +38,20 @@ bool Xpt2046Touch::start(lv_display_t* display) {
         .user_data = nullptr,
         .driver_data = nullptr
     };
-
-    if (esp_lcd_touch_new_spi_xpt2046(ioHandle, &config, &touchHandle) != ESP_OK) {
-        TT_LOG_E(TAG, "XPT2046 driver init failed");
-        cleanup();
-        return false;
-    }
-
-    const lvgl_port_touch_cfg_t touch_cfg = {
-        .disp = display,
-        .handle = touchHandle,
-    };
-
-    TT_LOG_I(TAG, "Adding touch to LVGL");
-    deviceHandle = lvgl_port_add_touch(&touch_cfg);
-    if (deviceHandle == nullptr) {
-        TT_LOG_E(TAG, "Adding touch failed");
-        cleanup();
-        return false;
-    }
-
-    instance = this;
-    return true;
-}
-
-bool Xpt2046Touch::stop() {
-    instance = nullptr;
-    cleanup();
-    return true;
-}
-
-void Xpt2046Touch::cleanup() {
-    if (deviceHandle != nullptr) {
-        lv_indev_delete(deviceHandle);
-        deviceHandle = nullptr;
-    }
-
-    if (touchHandle != nullptr) {
-        esp_lcd_touch_del(touchHandle);
-        touchHandle = nullptr;
-    }
-
-    if (ioHandle != nullptr) {
-        esp_lcd_panel_io_del(ioHandle);
-        ioHandle = nullptr;
-    }
 }
 
 bool Xpt2046Touch::getVBat(float& outputVbat) {
-    if (touchHandle != nullptr) {
-        // Shares the SPI bus with the display, so we have to sync/lock as this method might be called from anywhere
-        if (tt::lvgl::lock(50 / portTICK_PERIOD_MS)) {
-            esp_lcd_touch_xpt2046_read_battery_level(touchHandle, &outputVbat);
-            tt::lvgl::unlock();
-            return true;
-        }
+    auto touch_handle = getTouchHandle();
+    if (touch_handle == nullptr) {
+        return false;
     }
-    return false;
+
+    // Shares the SPI bus with the display, so we have to sync/lock as this method might be called from anywhere
+    if (!tt::lvgl::lock(50 / portTICK_PERIOD_MS)) {
+        return false;
+    }
+
+    esp_lcd_touch_xpt2046_read_battery_level(touch_handle, &outputVbat);
+    tt::lvgl::unlock();
+    return true;
 }