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 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:

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

• BSP_LCD_SUB_BOARD: Choose a LCD sub-board according to hardware.
• BSP_LCD_RGB_BUFFER_NUMS: Set number of frame buffers. Only when it is set to multiple can the anti-tearing function be turned on.
• BSP_LCD_RGB_REFRESH_MODE: Select the refresh mode for RGB LCD.
  • BSP_LCD_RGB_REFRESH_AUTO: Refresh the LCD in the most common way.
  • BSP_LCD_RGB_REFRESH_MANUALLY:Refresh the LCD in a specific task. It can reduce the bandwidth of PSRAM usage.
  • BSP_LCD_RGB_BOUNCE_BUFFER_MODE: Enable bounce buffer mode can achieve higher PCLK frequency at the cost of higher CPU consumption. And it's helpful when the screen drifts (Especially using Wi-Fi or OTA). It should be used with ESP32S3_DATA_CACHE_LINE_64B.
• BSP_DISPLAY_LVGL_BUF_CAPS: Choose the memory type of LVGL buffer. Internal memory is more fast.
• BSP_DISPLAY_LVGL_BUF_HEIGHT: Set the height of LVGL buffer, and its width is equal to LCD's width.
• BSP_DISPLAY_LVGL_AVOID_TEAR: Avoid tearing effect by using multiple buffers. Need to set BSP_LCD_RGB_BUFFER_NUMS more than 1.
  • 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 direct mode.

ChangeLog

v1.0.3 - 2023-02-13

Features

• Configurations:
  • Support to set number of frame buffers for RGB
  • Support to use bounce-buffer for RGB
  • Support to change the minimum delay time of LVGL task
  • Support to change the stack size of LVGL task
  • Support to enable anti-tearing function simply by using multiple buffers
• RGB Anti-tearing:
  • Optimize direct mode
  • Use triple-buffer in full-refresh mode