STEVAL-PTOOL4A : Error MC_DP_FAULT and Motor Profiler Connection Issue

[JulesC]

Hello,

I am attempting to run a Brushless DC-Flat motor using the STEVAL-PTOOL4A board. However, the system fails right after entering the RUN state, returning an ERROR MC_DP_FAULT (via MC_GetOccurredFaultsMotor1).

To resolve this, I tried using the Motor Profiler to identify the exact motor characteristics, but I am unable to establish a connection with the board (see attached screenshot).

Motor Characteristics:

• Nominal Voltage: 12 VDC

• Rated Speed: 10,000 rpm

• Starting torque: 225 mNm

• Rated Current: 2.18 A

• Winding Resistance (phase-phase): 0.88 Ω

• Winding Inductance (phase-phase): 0.331 mH

• Pole Pairs: 7

Could you please help me identify the cause of the MC_DP_FAULT error and why the Profiler fails to connect?

Best regards,

Jules

Edit 05/02: I have managed to get the motor running; however, I am still unable to establish a connection to the board via Motor Pilot.

[JulesC]

Hello,

I am still unable to establish a connection to the STEVAL-PTOOL4A board via Motor Pilot, even though the motor is now functional.

Here is a summary of the steps I have verified:

• Hardware Interface: Using an ST-LINK/V3MINI. Drivers and firmware are up to date.

• Firmware Flash: The code flashes successfully onto the STEVAL-PTOOL4A board (I can toggle LED_ERROR).

• Settings: * Baudrate: Set to 1,843,200 (default) in the firmware and matched in Motor Pilot. And the "Motor Profiler" option was enabled.

  

   

Since the UART communication for Motor Pilot doesn't seem to initialize despite these settings, could you please help me.

Best regards,

Jules

[JulesC]

Update: I tried reinstalling everything like this post suggested:
https://community.st.com/t5/stm32-mcus-motor-control/b-g431b-esc1-mcsdk-motor-pilot-profiler-failed-connection/td-p/736072
I still can't use "Discover Board" and when I connect manually I still get this message: "Port Open and try to configure the board".

[GMA]

Hello @JulesC,

Using Windows Device Manager, do you see the STMicroelectronics STLink Virtual COM port? Is it (COM6)?

[JulesC]

Hello @GMA,

Thanks for the response. Yes, I do:

I'm able to program the STEVAL board via the STLink (LED blinking); however, I can't use Motor Pilot.

Best regards,

Jules

[GMA]

Hello @JulesC,

Are you using the default User Interface settings?

[JulesC]

Hello @GMA,

Yes I use the default settings for all the MC Workbench project, I only changed the Motor and Power Supply settings, and added the "Motor Profiler" option.

Best regards,
Jules

[JulesC]

Hi,

I checked the UART pins on the board (J1). Using an oscilloscope at 1843200 baud, I captured the ASPEP handshake (Beacon packet):

• UART1RX (Motor Pilot): 0x85FFFFBF

• UART1TX (Board): 0x05C70114

The hardware link appears to be functional. However, it seems the capabilities in the board's response are being rejected by the software, preventing the transition to the ASPEP_CONFIGURED state.

[GMA]

Hello @JulesC,

When you connect the board to the MC Pilot, use a debugger to break the code.
The firmware must not remain in error handling.
The USART1_IRQHandler interrupt must be called for the MC Pilot transaction

[JulesC]

Hello @GMA,

Thank you for your answer.

Using the debugger, I have confirmed that when I click "Connect" in MC Pilot, the firmware does not get stuck in error handling and always returns to the main function.

Additionally, by using a breakpoint, I can confirm that the USART1_IRQHandler is indeed called during the connection attempt.

Best regards,

Jules