STSPIN32G4 Driver Output Anomaly

[romantic-qwy]

I designed my own PCB based on the EVSTSPIN32G4 evaluation board and created a project in STM32Cube IDE. When testing the STSPIN32G4’s internal driver, I encountered an issue: no matter what I do, the GHS voltage remains at 5.8V, the GLS voltage is 0V, and the OUT voltage is also 5.8V. I have tried setting PE8 to high or ground, as well as using PWM, but the voltage on GHS1 never rises. Reading the I²C register values does not trigger any protection; the STBY value is 0 and does not enter low-power mode; the nFAULT pin remains low regardless. As far as I can tell, there are no errors. Could an expert please provide some guidance? Thank you.

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[GMA]

Hello @romantic-qwy,

Did you enable the Driver Protection feature to report errors from the STSPIN32G4 device?

[romantic-qwy]

You mean the undervoltage and overcurrent protection in the driver section? It is enabled by default in the program, and I haven’t changed it. I read the status register and no protection had been triggered. Also, I found that when setting the register, only setting VCC_VAL and changing the voltage to a value other than 8V will cause the entire system to power off and trigger undervoltage protection. I’d like to ask for your advice. Thank you.

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[GMA]

Hello @romantic-qwy,

I mentioned Driver Protection.
Refer to section 5.5.3 nFAULT output of the STSPIN32G4 Datasheet document for more details.

[romantic-qwy]

Hello, I haven’t used the motor library and haven’t configured the BKIN section; I’m simply generating PWM on six channels and reading the pin levels via (GPIOE->IDR & GPIO_PIN_13). When viewed on the host computer, there is a constant PWM output, but once the motor is driven, there is no PWM.

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[GMA · Accepted solution]

Hello @romantic-qwy,

Did you check the STSPIN32G4 NFAULT register for the "nFAULT pin remains low" root cause?

[romantic-qwy]

感谢您的指导，原因是上电后就会引起RESET，而RESET是故障的一种，就会拉低nFAULT引脚表示故障，需要清除故障，我一直以为nFAULT低电平是无错误呢，万分感谢