Can someone please share me detail on how to see trapezoidal wave in TMC9660 driver board using osciloscope.
Can someone please share me detail on how to see trapezoidal wave in TMC9660 driver board using osciloscope.

Still no output even after executing command from direct mode.
Is that mounting point grounded?

Yes
Ow, just remembered that the road test is for a brushless DC motor ...
You aren't going to see a trapezoidal waveform, whatever you do, because it's a velocity profile you're looking at in the diagram, not a voltage waveform (as Doug helpfully pointed out)
Yes, This is a capture of a trapezoidal I did for a stepper motor project,

Velocity profile is visible because the frequency at the begin ramps up, then stable in the middle, then ramps down.

You aren't going to see a trapezoidal waveform, whatever you do, because it's a velocity profile you're looking at in the diagram, not a voltage waveform (as Doug helpfully pointed out)
Yes, This is a capture of a trapezoidal I did for a stepper motor project,

Velocity profile is visible because the frequency at the begin ramps up, then stable in the middle, then ramps down.

Ow, just remembered that the road test is for a brushless DC motor ...