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DRV8312-EVM GUI and setting Motor Speed in DRV8312GUI_Main.c

user4522670
Intellectual 690 points
Other Parts Discussed in Thread: DRV8312

I am testing a DRV8312-C2 Kit. Using the DRV8312GUI_Main.c, is there a way to set the target Motor Speed similar to the one in DRV8312 -EVM GUI?

Running the code in CCS, I see that the SpeedRPM is a calculated value which after enabling the motor, the speed is about 600 RPM (similar to the minimum speed setting in the GUI).

I am new on working with BLDC motors and hall sensors.  Appreciate any feedback.

  • 0
    TI__Guru** 118760 points
    Gui_SpeedRef

    is used to change the reference speed in that project. it is in per unit, not RPM. The default value is (0.2)
  • 0 in reply to ChrisClearman
    Intellectual 690 points

    I have used the graphing Tool  from CCS to capture 3 variables:

        DlogCh1 = bldc_pwm1.CmtnPointer;

       DlogCh2 = hall1.HallGpioAccepted;

       DlogCh3 = Gui_SpeedRPM;

    I am trying to understand the scale on both axes.

    The ISR_Frequency for the BLDC Sensored is set at 20 kHz. That means one unit in x-axis (i.e. 1 sample) is taken every 50 microseconds.

    How about the y-axis? How do I interpret the levels? For the A-0 and B-0 graphs, i am expecting values of 0-5.  For the A-1 Graph, based on the value of Gui_SpeedRPM from the watchlist, it corresponds to about 600 RPM (595 RPM from the screenshot).

    Looking forward for feedback. Thanks!