esp-idf/examples/peripherals/ppa/ppa_rgb_lcd

Supported Targets	ESP32-P4	ESP32-S31

PPA RGB LCD Example

Overview

This example demonstrates how to use esp_driver_ppa to process an image and display the results on a generic RGB LCD panel.

The image is scaled, rotated, mirrored, blended, and filled by PPA, then pushed to the RGB panel with esp_lcd_panel_draw_bitmap().

Hardware Required

• An ESP development board, which supports the RGB LCD peripheral
• A general RGB panel, supports 16/24 bit-width, with HSYNC, VSYNC and DE signal
• An USB cable for power supply and programming

Configure

Run idf.py menuconfig and open Example Configuration:

1. Set the RGB LCD timing parameters.
2. Set the RGB LCD GPIO assignments.
3. Choose whether the source image comes from the embedded JPEG or the pre-generated RGB565 image.

Build and Flash

Run idf.py -p PORT build flash monitor to build, flash and monitor the project. A picture with 'ESP32' word will show up on the LCD as expected.

The first time you run idf.py for the example will cost extra time as the build system needs to address the component dependencies and downloads the missing components from the ESP Component Registry into managed_components folder.

(To exit the serial monitor, type Ctrl-].)

See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.

Example Output

I (1555) main_task: Calling app_main()
I (1565) ppa_rgb: Turn off LCD backlight
I (1575) ppa_rgb: Install RGB LCD panel driver
I (1605) ppa_rgb: Initialize RGB LCD panel
I (1615) ppa_rgb: Turn on LCD backlight
I (1795) ppa_rgb: JPEG image decoded! Size of the decoded image is: 320px x 240px
start srm operations
start blend operations
start fill operations
I (10085) main_task: Returned from app_main()

Reference

• ESP-IDF: Pixel-Processing Accelerator
• ESP-IDF: RGB LCD