Performance improvements (#203)

- Use DMA buffers for drawing
- Fix for draw buffer sizes
- Reduced rendering refresh interval
- Removed custom icons from wifi app to fix scroll performance issue

Boards/M5stackCore2/Source/hal/Core2Display.cpp

@@ -73,7 +73,7 @@ bool Core2Display::start() {
         .panel_handle = panelHandle,
         .control_handle = nullptr,
         .buffer_size = CORE2_LCD_DRAW_BUFFER_SIZE,
-        .double_buffer = true,
+        .double_buffer = false,
         .trans_size = 0,
         .hres = CORE2_LCD_HORIZONTAL_RESOLUTION,
         .vres = CORE2_LCD_VERTICAL_RESOLUTION,
@@ -85,8 +85,8 @@ bool Core2Display::start() {
         },
         .color_format = LV_COLOR_FORMAT_RGB565,
         .flags = {
-            .buff_dma = false,
-            .buff_spiram = true,
+            .buff_dma = true,
+            .buff_spiram = false,
             .sw_rotate = false,
             .swap_bytes = true,
             .full_refresh = false,

Boards/M5stackCore2/Source/hal/Core2DisplayConstants.h

@@ -8,4 +8,4 @@
 #define CORE2_LCD_VERTICAL_RESOLUTION 240
 #define CORE2_LCD_BITS_PER_PIXEL 16
 #define CORE2_LCD_DRAW_BUFFER_HEIGHT (CORE2_LCD_VERTICAL_RESOLUTION / 10)
-#define CORE2_LCD_DRAW_BUFFER_SIZE (CORE2_LCD_HORIZONTAL_RESOLUTION * CORE2_LCD_DRAW_BUFFER_HEIGHT * (CORE2_LCD_BITS_PER_PIXEL / 8))
+#define CORE2_LCD_DRAW_BUFFER_SIZE (CORE2_LCD_HORIZONTAL_RESOLUTION * CORE2_LCD_DRAW_BUFFER_HEIGHT)