SPI not working with MBED (was: Performance of XIAO with Sharp Memory Display)

[raffiniert]

@msfujino

The mbed clock pins are set to “low power”, so the waveforms are not properly square. The non-mbed pins are set to “high power”, so they are properly square

what exactly do you mean by that? Did you see this in the code or measure it with an oscilloscope?