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M5Stack Core S3 Display Usermod

Display usermod for the ILI9342C 320x240 TFT display on the M5Stack Core S3, using LovyanGFX.

NOTE: The M5Stack Core S3 has 8MB of PSRAM, but it's uncommonly QSPI PSRAM. This was likely a design tradeoff to free up more pins for add-on modules over using octal PSRAM which blocks off more pins.

Pin Mapping (M5Stack Core S3)

ESP32-S3 ILI9342C Description
G37 MOSI SPI Data
G36 SCLK SPI Clock
G3 CS Chip Select
G35 DC Data/Command

Reset is controlled via the AW9523B GPIO expander (P1_1). Backlight is powered via AXP2101 PMU (DLDO1).

Building

In platformio_override.ini for your M5Stack Core S3 environment:

build_flags =
    -D USERMOD_M5STACK_CORE_S3_DISPLAY
    ;; For the M5Stack ModuleAudio:
    -D SR_ENABLE_DEFAULT
    -D SR_DMTYPE=6
    -D I2S_SDPIN=13
    -D I2S_WSPIN=6
    -D I2S_CKPIN=0
    -D MCLK_PIN=7
    -D HW_SDA_PIN=12
    -D HW_SCL_PIN=11

lib_deps =
    https://github.com/lovyan03/LovyanGFX

Features

  • SSID and IP address in header bar
  • 16-band graphic equalizer bars (differential drawing)
  • Real audio reactive data when Audioreactive usermod is enabled
  • Simulated bouncing bars when no audio data
  • Rainbow color per bar (red → violet)
  • Maximum of 100 FPS to match AudioReactive
  • Minimum of 5 FPS so it updates even if you use unlimited FPS mode.

Display Notes

  • Uses LovyanGFX with SPI3_HOST (HSPI)
  • Native landscape 320x240 resolution
  • RGB color order, display inversion enabled
  • Backlight always on (controlled by AXP2101 DLDO1)

TroyHacks Recommended AudioReactive Settings

For the M5Stack Core S3 + ModuleAudio line-in:

  • The ModuleAudio uses an ES8388
  • Squelch & Gain at 1
  • AGC is Normal
  • MicLev is Freeze
  • Mic Quality is Perfect
  • FFT Window is Nutall (or whatever you prefer)
  • Profile is Generic Line-In
  • Limiter is Enabled, with a rise of 1 and a fall of 250 (to 500).