Hi. I just got my DRV8825 drive tow days ago. When I did current limiting, the reference voltage was always zero no matter how I turned the potentiometer. It seems like the VREF pin is grounded. The wiring is shown in the figure attached. I measured the vref exactly as what the figure showed.
I’m wondering if the driver was broke. I guess so because my first soldering was bad so I desoldered pins and soldered again. I probably heated the board too long (more than 5 secs). When connecting wire, I always keep capacity connected before or after I disconnecting the power supply.
Anyone had similar problem with me? How can I test my driver see if it’s broken or not.