ESP32-P4-NANO Example

Brings up the Waveshare ESP32-P4-NANO board through the espp::Esp32P4Nano BSP and drives an LVGL GUI. It exercises the display, touch, audio, microphone, camera, uSD card and Ethernet:

  • Display + touch (MIPI-DSI + GT911): a tabview GUI. On the Status tab, touch the screen to draw circles and play a click; it also shows live subsystem state (panel, touch, SD, Ethernet, camera size, memory / uptime). The rotate / clear buttons rotate the display and clear the drawing.

  • Audio (ES8311 + NS4150B): the Audio tab has record / play buttons and speaker / microphone volume controls. Recording captures from the onboard microphone (full-duplex through the codec) into a PSRAM buffer; play streams it back to the speaker.

  • Camera (MIPI-CSI, OV5647): the Camera tab shows the live RGB565 feed. Each frame from the BSP capture task is copied into an LVGL canvas.

  • uSD / TF card (4-bit SDMMC): mounted at boot (if a card is present); its size is logged and shown on the Status tab.

  • Ethernet (internal EMAC + IP101GRI RMII PHY): started as a DHCP client; the acquired IP is logged and shown on the Status tab.

How the camera feed reaches the GUI

initialize_camera() runs a capture task in the BSP that hands each RGB565 frame to a callback. The example forwards it to the thread-safe Gui::set_camera_frame(data, w, h), which copies the frame into a PSRAM canvas buffer (allocated lazily on the first frame / a size change) and invalidates the LVGL canvas. The GUI’s LVGL task then renders it on the Camera tab.

Build and flash

idf.py set-target esp32p4
idf.py build flash monitor

The example uses a custom 16 MB flash partition table (partitions.csv) because the display + LVGL + camera + audio application no longer fits the default 1 MB app partition. PSRAM and the MIPI-CSI camera pipeline are enabled via sdkconfig.defaults.