usb_camera_lcd_display

USB Stream Lcd Display Example

This routine demonstrates how to use the usb_stream component to get an image from a USB camera and display it dynamically on the RGB screen.

• Pressing the boot button can switch the display resolution.
• For better performance, please use ESP-IDF release/v5.0 or above versions.
• Currently only images with a resolution smaller than the screen resolution are displayed
• When the image width is equal to the screen width, the refresh rate is at its highest.

Try the example through the esp-launchpad

This example has been built for ESP32-S3-LCD-EV-Board, you can use esp-launchpad to flash the binary to your board directly.

Please choose lcd_ev_subboard3_800_480_usb_camera or lcd_ev_subboard2_480_480_usb_camera, then click flash to quickly start

Hardware

• An ESP32-S3-LCD-EV-Board development board with 800*480/480*480 LCD.
• A USB camera (Can be connected to USB port or Expansion Connector)
• An USB Type-C cable for Power supply and programming (Please connect to UART port instead of USB port)

Note: Error message with A fatal error occurred: Could not open /dev/ttyACM0, the port doesn't exist: Please first make sure development board connected, then make board into "Download Boot" mode to upload by following steps:

1. keep pressing "BOOT(SW2)" button
2. short press "RST(SW1)" button
3. release "BOOT(SW2)".
4. upload program and reset

PSRAM 120M DDR

The PSRAM 120M DDR feature is intended to achieve the best performance of RGB LCD. It is only available with ESP-IDF release/v5.1 and above. It can be used by enabling the IDF_EXPERIMENTAL_FEATURES, SPIRAM_SPEED_120M, SPIRAM_MODE_OCT options. see here for more details.

Note: The PSRAM 120 MHz DDR is an experimental feature and it has temperature risks as below.

• Cannot guarantee normal functioning with a temperature higher than 65 degrees Celsius.
• Temperature changes can also cause the crash of accessing to PSRAM/Flash, see here for more details.

Performance

• Displaying 800480 images on ESP32-S3-LCD-EV-Board with psram 120M and 800480 screen can reach 16FPS
• Displaying 480320 images on ESP32-S3-LCD-Ev-Board with psram 120M and 480480 screen can reach 29FPS

How To Use

Note:

1. First delete existing build, sdkconfig , sdkconfig.old

rm -rf build sdkconfig sdkconfig.old

1. Use the command line to enable the relevant configuration

idf.py -D SDKCONFIG_DEFAULTS="sdkconfig.defaults;sdkconfig.psram_octal_120m" reconfigure

1. Compile and burn

idf.py build flash monitor