espressif: add ESP32-S3-BOX-3 board definition - #11431
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Add ports/espressif/boards/espressif_esp32s3_box_3/ (five files). The BOX-3 shares the BOX's SoC, flash and LCD bus, but differs in four ways established from esp-bsp and on hardware: - Backlight is GPIO47, not 45. The BOX firmware PWMs GPIO45, which is I2S LRCK here, so the screen stays dark. - The panel reset is active HIGH. FourWire assumes active low and would leave the panel in reset, so board_init() drives GPIO48 and FourWire gets reset=None. - The panel needs the esp-bsp vendor init sequence; neither the BOX's 6-command sequence nor the generic ILI9341 one lights it. - PSRAM is 16MB, not 8MB. pins.c mirrors the BOX layout, differing only where the hardware does: LCD_CTRL(GPIO45) is LCD_BACKLIGHT(GPIO47), and I2S_LRCK moves 47 -> 45. Serves the ILI9341/GT911 revision; the ST7789/TT21100 revision is a known gap. Verified on hardware: board_id, pin aliases, 16MB PSRAM, panel and audio.
dhalbert
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Sep 20, 2026
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Great, thank you!
Could you file a corresponding PR in https://github.com/adafruit/circuitpython-org ? Thanks.
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Adds the
espressif_esp32s3_box_3board definition. Fixes #10169.The BOX-3 shares the BOX's SoC, flash and LCD bus, but differs in four ways:
board_init()drives GPIO48 and FourWire getsreset=Nonepins.cmirrors the BOX file, changing onlyLCD_CTRL(45)toLCD_BACKLIGHT(47)andI2S_LRCKfrom 47 to 45.Verified on hardware:
board_id, pin aliases, 16MB PSRAM, LCD (320x240, no user-code workaround) and audio. Serves the ILI9341/GT911 revision; the ST7789/TT21100 revision is a known gap.PID allocation: espressif/usb-pids#383 (0x7014/0x7015).