Hello,
I've had some issues understanding exactly how the build-in MCU sends SPI signals to the DRV.
I've been measuring the SPI pins in parallel on an oscilloscope, and saving a buffer of when (E.g.) changing the step mode from full to 1/16th stepping (register data 0000000, to 0000110), after which the motor clearly changes from full-step to micro.
However, at no times does any of the transmissions contain anything but 0 in the data part of the transmissions (Still has the register parts fine, and receives a MISO response). Only a few times did I catch a transmission with the "drive mode" register (address = 0x05), and this also had only 0's in the data field.
Clearly I am missing something, since the driver works fine and the motor is running as expected, however it just doesn't seem like any data is ever exchanged between the MCU and the DRV.
Does anyone have an idea of what I might be missing or even better have a transmission by transmission walkthrough example from the board starts up to sending different requests to the DRV.
Thanks for the help, it is much appreciated!
