SPIButton: RP2040 mode #163
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Add an SPI_BtnMode for the RP2040.
Opened in draft as I can't figure out why the OpenFFBoard still boots into TM-mode if RP2040 mode was saved to flash.#160 has been opened if this isn't the place for spitting ideas.
Edit: Turns out that
restoreFlash()runssetConfig()which in turn runsinitSPI(), only for theSPI_Buttonsconstructor to change some of the SPI port values and re-runinitSPI(). 7cbcb08 fixes this behavior, published separately in #164.