SPI Clock Frequency

Hi @Gordon,

thanks for the feedback - I will try to go the first way first (maybe add external USB<=> Serial for accessing the board without USB).

Regarding the compile time way: I do not really understand what the chip.speed setting in the .py file is good for? Is it used somewhere during the build to e.g. generate header files or code? Or is it only used to generate the (really nice) web pages?

Thanks!