Hello, I am using the PICA board in a custom design itopie prusa printer and had a question about the serial/servo expansion. Can the TX and RX pins of the pica serial ports be used for communication through SPI? I am trying to use tmc 2130 stepstick drivers on my x and y axes.
As I later discovered, the SPI connection can be obtained through the EXP 2 header. I defined two of the servo connections for my CS pins.