Hi Pavlin,
Please try using decay mode 101 (automixed decay at all times) or 011 (mixed decay at all times). This two settings are good for initial evaluation. 001 (Slow decay for increasing, mixed decay for decreasing) may lead to undesirable results depending on the system voltage, motor inductor, and register settings.
Also can you confirm you the full scale current of the stepper motor is 1.66A assuming a 0.22 Ohm resistor? If not, please double check the register settings for the full scale current.
Please try using decay mode 101 (automixed decay at all times) or 011 (mixed decay at all times). This two settings are good for initial evaluation. 001 (Slow decay for increasing, mixed decay for decreasing) may lead to undesirable results depending on the system voltage, motor inductor, and register settings.
Also can you confirm you the full scale current of the stepper motor is 1.66A assuming a 0.22 Ohm resistor? If not, please double check the register settings for the full scale current.