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M569.2: Read or write stepper driver register
Supported in RRF 3.3 and later on main boards with TMC22xx or TMC51xx stepper drivers.
- Pnn Motor driver number
- Rnn Register number, 0-127
- Vnnnn Value to write (optional)
- M569.2 P1 R0
If the V parameter is not provided, this command reads the specified register and returns the value of that register. If the V parameter is provided, that value is written to the specified register.
WARNING! Use of M569.2 to write stepper driver registers may result in damage to the stepper drivers, for example from excessive motor current or insufficient blanking time.