Add LVGL and set up with display/touch drivers

main/display.h

@@ -4,17 +4,14 @@
 
 #include "esp_lcd_panel_io.h"
 
-#define LCD_SPI_HOST  SPI2_HOST
+#define LCD_SPI_HOST   SPI2_HOST
+#define TOUCH_SPI_HOST SPI3_HOST
 
-#define GPIO_TFT_MISO CONFIG_TFT_MISO_PIN
-#define GPIO_TFT_MOSI CONFIG_TFT_MOSI_PIN
-#define GPIO_TFT_SCKL CONFIG_TFT_SCKL_PIN
-#define GPIO_TFT_CS   CONFIG_TFT_CS_PIN
-#define GPIO_TFT_DC   CONFIG_TFT_DC_PIN
-#define GPIO_TFT_BL   CONFIG_TFT_BL_PIN // Backlight
-#define TFT_HRES      CONFIG_TFT_HRES
-#define TFT_VRES      CONFIG_TFT_VRES
-#define TFT_BPP       CONFIG_TFT_BPP
+#define TFT_HRES           CONFIG_TFT_HRES
+#define TFT_VRES           CONFIG_TFT_VRES
+#define TFT_BPP            CONFIG_TFT_BPP
+
+#define LVGL_BUF_SIZE TFT_VRES * TFT_HRES / 10 * (TFT_BPP / 8)
 
 /**
  * Draws a test bitmap of stripes of colors to the LCD.
@@ -22,6 +19,6 @@
 void test_draw_bitmap(esp_lcd_panel_handle_t panel_handle);
 
 /**
- * Initializes the SPI LCD in preparation for writing graphics to it.
+ * Initializes the display TFT and touchscreen.
  */
-void init_spi_lcd(void);
+void init_display(void);