getting started to add lib support for new boards (STM32F411)

[vega1013]

I would like to know if there's a minimal example for adding support for a new board out there?

The readme file states under "Interface modifications" some redifinitions, but what else do I have to do on the software side to getting my STM32F411 board work together with the USB Host shield? Isn't a working SPI interface the only thing?

[werpu]

I would like to know as well, what needs to be done, my personal guess is you have to overwrite the SPI pins via a specialized header file if the board supports spi thats probably it then you application needs to initialize spi.
I would like to know as well, because I would love to attach a host shield to an RP2040/2345 (Pico Pi and Pico Pi2)

[esp32beans]

A USB host shield is not needed on Pico boards. There is a library that uses the RP2040/RP2350 PIO for USB host.

https://github.com/sekigon-gonnoc/Pico-PIO-USB

Adafruit makes an RP2040 board with USB type A connector. The Adafruit TinyUSB lib supports the Pico USB PIO lib.