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RE: DRV8711: need help for Decay Mode Setting Optimization

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Hi user4946283,

Assuming you want 5.5A in your motor, please try the following settings to start and provide current waveforms:


CTRL Register 0x0da1 --10x gain, external stall detection, 1/32 step, enable outputs
TORQUE Register 0x11ff -- 100us BEMF sample, maximum torque
OFF Register 0x2028 -- internal indexer, 20us off time
BLANK Register 0x3100 -- adaptive blanking, 1us blanking time
DECAY Register 0x430A -- use mixed decay at all times, tdecay of 5us
STALL Register 0x5040 -- BEMF/32, Stall on first step, default stall setting
DRIVE Register 0x6a59 -- defaults

The 5.5A is based on the torque register setting of FF, gain of 10, and a 0.05 Ohm sense resistor. If you desire less current, please adjust the setting.

When providing the current waveform, please add the step input.

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