TMC2209 & SpreadCycle & Interpolation

[cranefist]

How do i set the following settings for TMC2209:

0 microstepping
Interpolation true
SpreadCycle

There does not seem to exists SpreadCycle in the mode selection? And if i set microstepping to 0 it does not like it. Cant find anything about interpolation setting at all?

These settings optimize torque from my nema17 motors. SpreadCycle offers higher torque than StealthChop, and having 0 microstepping gives the highest torque output, while interpolation smooths the movements and reduces motor noise when using 0 microstepping.

As my leadscrews have 1mm lead, 200/mm steps is more than enough for my purposes.