Troubleshoot modulation / hall effect sensors / STM32 NUCLEO F303RE

developement
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41

Apologies, I was using a non DAC pin to plot dc_a :slight_smile: There’s only 2 DAC pins available, when I plot dc_a on one of them, it looks just like dc_b and dc_c (shifted)

42

A phase was my mistake, it looks like the others, I’ll do the test you suggested next

43

These are the PWM pins after driver.setPwm(0.25, 0.5, 0.75):

PWMPins
PWMPins800×480 56.7 KB

44

how are these plots being generated?

in BLDCDriver3PWM::setPwm:

analogWrite(PA4, dc_a * 4095);
analogWrite(PA5, dc_b * 4095);

45

Also, if you know any BLDC motor with Hall effect sensors that works with SimpleFOC, please share, I would like to get one for sanity check. Thank you!

46

A little more zoomed in, to reveal the rectangular PWM signal:

PWMPinsCloseup
PWMPinsCloseup800×480 51.1 KB

47

I changed it to:

driver.setPwm(0.25 * driver.voltage_limit, 0.5 * driver.voltage_limit, 0.75 * driver.voltage_limit);

So I can get 25, 50, and 75% instead, it looks correct to me:

PWMPins3rdAttempt
PWMPins3rdAttempt800×480 59.9 KB

48

Ok, this last trace clearly shows the PWM is working as expected… so back to square one, as they say…
I would assume right now it has to be related to the sensors somehow, but must admit I’m a bit confused what the issue is…