esp32 support

add comments

hal/esp32/app_hal.cpp

@@ -3,6 +3,8 @@
 #include "lvgl.h"
 #include "PanelLan.h"
 
+
+/* Set the board type. (Uses LovyanGFX internally to manage display drivers) */
 PanelLan tft(BOARD_SC01_PLUS);
 
 static const uint32_t screenWidth = 480;
@@ -56,6 +58,7 @@ void my_touchpad_read(lv_indev_t *indev_driver, lv_indev_data_t *data)
   }
 }
 
+/* Tick source, tell LVGL how much time (milliseconds) has passed */
 static uint32_t my_tick(void)
 {
   return millis();
@@ -64,28 +67,33 @@ static uint32_t my_tick(void)
 void hal_setup(void)
 {
 
+  /* Initialize the display drivers */
   tft.init();
   tft.initDMA();
   tft.startWrite();
   tft.fillScreen(TFT_BLACK);
+
+  /* Set display rotation to landscape */
   tft.setRotation(1);
 
+  /* Set the tick callback */
   lv_tick_set_cb(my_tick);
 
+  /* Create LVGL display and set the flush function */
   lvDisplay = lv_display_create(screenWidth, screenHeight);
   lv_display_set_color_format(lvDisplay, LV_COLOR_FORMAT_RGB565);
   lv_display_set_flush_cb(lvDisplay, my_disp_flush);
   lv_display_set_buffers(lvDisplay, lvBuffer[0], lvBuffer[1], lvBufferSize, LV_DISPLAY_RENDER_MODE_PARTIAL);
 
+  /* Set the touch input function */
   lvInput = lv_indev_create();
   lv_indev_set_type(lvInput, LV_INDEV_TYPE_POINTER);
   lv_indev_set_read_cb(lvInput, my_touchpad_read);
-
 }
 
 void hal_loop(void)
 {
-  // NO while loop in this function! (handled by framework)
+  /* NO while loop in this function! (handled by framework) */
   lv_timer_handler(); // Update the UI-
   delay(5);
 }

hal/esp32/app_hal.h

@@ -7,9 +7,16 @@ extern "C" {
 
 
 /**
- * Add some description please
+ * This function runs once and typically includes:
+ * - Setting up display drivers.
+ * - Configuring LVGL display and input.=
  */
 void hal_setup(void);
+
+/**
+ * This function is continuously executed and typically includes:
+ * - Updating LVGL's internal state & UI.
+ */
 void hal_loop(void);