GPIO assignments for GeekMagic S3

[sfromis]

Having got the GeekMagic S3, I went looking for GPIO assignments to configure in my firmware (Tasmota). Tried looking for them in the source code files in this repository, like looking for TFT_CS, but failed to find anything looking like a specific config. I can admit to not having experience with the libraries used.

With the older ESP32-based GeekMagic SmallTV pro with ST7789 (without PSRAM), I got it to work with these pins:

Gpio  2  SPI DC
Gpio  3  SPI CS
Gpio 18  SPI CLK
Gpio 23  SPI MOSI
Gpio 25  Display backlight PWM
Gpio  4  Display Rst
Gpio 32  Touch button on top

I'm assuming that I need to find similar pins on the GeekMagic S3, but where?

[casebeer]

I believe these are the correct values based on the code in this repo and testing with a GeekMagic-S3 device:

• SPI_SCLK_PIN: GPIO12
• SPI_MOSI_PIN: GPIO11
• TFT_DC_PIN: GPIO7
• TFT_RESET_PIN: GPIO6
• TFT_BACKLIGHT_PIN: GPIO14
• TOUCH_BUTTON_PIN: GPIO9 # a.k.a. TOUCH9 on ESP32-S3
• TFT SPI CS pin: not connected

Additionally, on the S3, I find that a touch measurement period of 0.25 ms (per https://community.home-assistant.io/t/esp32-s3-touch-sensor/667563/2) with a threshold of 130000 works on my device using ESPHome.

SPI and TFT pin mappings are from https://github.com/GeekMagicClock/GeekMagic-S3/blame/80b631c8c10dd79f2e198e56fbdfb7fa85e51681/lib/TFT_eSPI/User_Setup.h#L223-L229C39

Touch button pin mapping is from 9901fb5#diff-6b5336478a255e79fdeb0c3c678393b7f49e21bdd4ac419ccbc9633d0587bbadR7

[sfromis]

Thanks, that does match what someone else posted with Tasmota. Not sure if touch threshold numbers are on the same scale across projects, but I see it work with a value of 26000.