DRV8424: Dev8424 control

Hi Sir,

 My customer is testing Drv8424 and drv8462 evm by using their ASIC  with nSLEEP、ENABLE、DIR、STEP、M1、M0 and VREF. Testing DRV8462 evm is ok, but controlling DRV8424 evm has problem: can’t drive motor driver, unable control but can feel motor with little vibration. Is there any suggestion for their reference to check their control signal? (Using onboard control/GUI is ok, and they don’t control decay signal). Thanks for your kindly help.

Beat regards,

Gary Teng