esp-bsp

BSP: ESP32-S3-LCD-EV-Board

• User Guide

ESP32-S3-LCD-EV-Board is a development board for evaluating and verifying ESP32-S3 screen interactive applications. It has the functions of touch screen interaction and voice interaction. The development board has the following characteristics:

• Onboard ESP32-S3-WROOM-1 module, with built-in 16 MB Flash + 8/16 MB PSRAM
• Onboard audio codec + audio amplifier
• Onboard dual microphone pickup
• USB type-C interface download and debugging
• It can be used with different screen sub boards, and supports RGB, 8080, SPI, I2C interface screens, as below:

Board Name	Screen Size (inch)	Resolution	LCD Driver IC (Interface)	Touch Driver IC	Schematic	Support
ESP32-S3-LCD-EV-Board-SUB1	0.9	128 x 64	SSD1315 (I2C)	*	link	Not yet
	2.4	320 x 240	ST7789V (SPI)	XTP2046		Not yet
ESP32-S3-LCD-EV-Board-SUB2	3.5	480 x 320	ST7796S (8080)	GT911	link	Not yet
	3.95	480 x 480	GC9503CV (RGB)	FT5x06		Yes
ESP32-S3-LCD-EV-Board-SUB3	4.3	800 x 480	ST7262E43 (RGB)	GT1151	link	Yes

Here are some useful configurations in menuconfig that can be customed by user:

• BSP_LCD_RGB_BUFFER_NUMS: Configure the number of frame buffers. The anti-tearing function can be activated only when set to a value greater than one.
• BSP_LCD_RGB_REFRESH_MODE: Choose the refresh mode for the RGB LCD.
  • BSP_LCD_RGB_REFRESH_AUTO: Use the most common method to refresh the LCD.
  • BSP_LCD_RGB_BOUNCE_BUFFER_MODE: Enabling bounce buffer mode can lead to a higher PCLK frequency at the expense of increased CPU consumption. This mode is particularly useful when dealing with screen drift, especially in scenarios involving Wi-Fi usage or writing to Flash memory. This feature should be used in conjunction with ESP32S3_DATA_CACHE_LINE_64B configuration. For more detailed information, refer to the documentation.
• BSP_DISPLAY_LVGL_BUF_CAPS: Select the memory type for the LVGL buffer. Internal memory offers better performance.
• BSP_DISPLAY_LVGL_BUF_HEIGHT: Set the height of the LVGL buffer, with its width aligning with the LCD’s width. The default value is 100, decreasing it can lower memory consumption.
• BSP_DISPLAY_LVGL_AVOID_TEAR: Avoid tearing effect by using multiple buffers. This requires setting BSP_LCD_RGB_BUFFER_NUMS to a value greater than 1.
  • BSP_DISPLAY_LVGL_MODE:
    • BSP_DISPLAY_LVGL_FULL_REFRESH: Use LVGL full-refresh mode. Set BSP_LCD_RGB_BUFFER_NUMS to 3 will get higher FPS`.
    • BSP_DISPLAY_LVGL_DIRECT_MODE: Use LVGL’s direct mode.

Based on the above configurations, there are three different anti-tearing modes can be used:

• RGB double-buffer + LVGL full-refresh mode:
  • Set BSP_LCD_RGB_BUFFER_NUMS to 2
  • Enable BSP_DISPLAY_LVGL_AVOID_TEAR and BSP_DISPLAY_LVGL_FULL_REFRESH
• RGB double-buffer + LVGL direct-mode:
  • Set BSP_LCD_RGB_BUFFER_NUMS to 2
  • Enable BSP_DISPLAY_LVGL_AVOID_TEAR and BSP_DISPLAY_LVGL_DIRECT_MODE
• RGB triple-buffer + LVGL full-refresh mode:
  • Set BSP_LCD_RGB_BUFFER_NUMS to 3
  • Enable BSP_DISPLAY_LVGL_AVOID_TEAR and BSP_DISPLAY_LVGL_FULL_REFRESH

Capabilities and dependencies

| Capability | Available | Component | Version | |————-|——————|————————————————————————————————————|———-| | DISPLAY |:heavy_check_mark:| espressif/esp_lcd_gc9503 | ^3 | | LVGL_PORT |:heavy_check_mark:| espressif/esp_lvgl_port | ^2 | | TOUCH |:heavy_check_mark:|espressif/esp_lcd_touch_ft5x06| ^1 | | BUTTONS |:heavy_check_mark:| espressif/button |>=2.5,<4.0| | AUDIO |:heavy_check_mark:| espressif/esp_codec_dev | ^1 | |AUDIO_SPEAKER|:heavy_check_mark:| | | | AUDIO_MIC |:heavy_check_mark:| | | | SDCARD | :x: | | | | IMU | :x: | | |

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