STM32 MCUs Motor control

 Using HAL_SPI_TransmitReceive properly. I've corrected the code to send the command 0x25 followed by two dummy bytes (0x00, 0x00) in a single transaction to read the ACC register.However, now I’m facing a new issue: no matter what value I set for ACC, when I read it back, I always get 0x80 0x00 0x89 (i.e., 128 0 137). I double-checked the write sequence as well and it appears to complete successfully.(I am able to execute run command) I’ve also attached the image and my updated code for reference. Any suggestions on what I might be

I am working on a project to drive a sliding door using a PMSM motor in position control mode (details are given in the below). I determined the PID coefficients using ST AN5464. The motor operates very good during normal right/left rotation commands. However, when the motor is holding a fixed position, it sometimes exhibits small vibrations.When the motor is in a fixed position and I use the PWMC_SwitchOffPWM(pwmcHandle[M1]) function to disable PWM, the vibrations also stop. However, disabling the PWM is not desired in the project.Below, I have attached a graph obtained using ST Motor Pilot V6.4.0 that shows the I_Q_MEAS and I_Q_REF signals of the PMSM motor during vibration in standstill (Although I couldn't take a screenshot as I wanted, it's clear that the I_Q_MEAS and and I_Q_REF signals are oscillating). As far as I understand, the I_Q_MEAS and I_Q_REF signals should remain stable when the motor is stationary.Is there anyone who can help me with this issue

 I'm  using button in the MC_APP_PostMediumFrequencyHook_M1 to stop the motor. When I press the button, the motor enters freewheel mode, so it is not actively braked — it simply coasts down.Later, when I release the button and increase the potentiometer, the motor starts again via a speed ramp. However, I noticed that the ramp always starts from 0 speed, even though the motor was still spinning due to the freewheel behavior.As a result, the motor gets "locked" momentarily (due to the controller assuming 0 speed), and then accelerates. This is not the behavior I want. Since the motor never truly stopped (freewheel), I would like the ramp to continue from the current actual speed, not from 0.How can I make the ramp start from the actual mechanical speed of the motor when restarting after freewheel?__weak void MC_APP_PostMediumFrequencyHook_M1(void){ uint16_t rawValue = RCM_ExecRegularConv(&am

Hi ST Community,I'm working with a sensorless BLDC motor and using the ST Motor Control Profiler to extract the required motor parameters, as I don't have access to the exact datasheet values. I'm facing some issues and would appreciate guidance.What I did:Entered motor information including Max Current, Max RPM, and Number of Poles.When I entered the actual Max Current, the profiler often gave Speed Feedback Faults or failed profiling.To overcome this, I reduced the current in steps from 93% down to 80% of Max Current, and profiling succee

Hello STM community,I am planning to use the Nucleo-H755ZI board (STM32H7 series) in combination with the X-NUCLEO-IHM07M1 motor driver expansion board, and I have a couple of questions regarding compatibility and setup:Compatibility:Is the Nucleo-H755ZI board fully compatible with the X-NUCLEO-IHM07M1 motor driver expansion when plugged directly into the Arduino-compatible headers (MORPHO header)? I want to ensure that the board can drive motors as intended without any issues in terms of voltage levels or pin mappings.Required Modifications:Does the Nucleo-H755ZI-Q variant (specifically) require any modifications or special considerations for proper integration with the X-NUCLEO-IHM07M1? I am aware that the STM32 Nucleo boards generally follow the same Arduino pinout, but

Hi everyone!I am currently working on the steval-eth001v1 kit. If I open the project attached in the firmware, there is no problem. But when I want to create a new project using IAR or Keil C, an error appears that the c file is missing.Anyone who has encountered the same problem can help me?I can't find the c file containing the above functions in the new project, but when I run the project attached in the firmware, it doesn't report an error. 

Dear Community, I'm using a custom board based on the EVSPIN32G4 with an STLINK-V3MODS probe.I want to power the LDO using only the 5V from USB, just to flash the microcontroller.My REGN voltage is 4V(VUSB), but the 3.3V output from the LDO is 0V.I don't understand why. Any ideas?   Thanks,

Hi All,I am trying to get up and running the above hardware. I downloaded the software for the board, and we already use IAR compiler here. After compiling and downloading (via the STLink), the system runs the program just fine.However, I just need to run the system with the onboard POT and it is not moving or energizing the motor at all.I changed the 6step_conf.h file to POTENTIOMETER_INTERFACE = 1 and all others to 0. Nothing happens.All the voltages to the board are perfect (running 70VDC to the board via a 7 amp programmable power supply).All help would be greatly appreciated. This is my first intro into using the part. Time is very tight.regards,Charles

ST Documentation describes how to determine prior gains of Current PI controllers. My doubts are:1. Will these gains work for all load conditions? How to tune them under varying load conditions? What is the documentation/process related to it, please share?2. How is Motor Control Workbench auto calculating PI Gains for Speed Controller Regulator? Please share documentation/formulas related to it. Official documentation is only about Current PI controllers gains determination. Thank you for your time and support.

Hello,in file RegListSTMV2.json I can define custom registers. Most registers have "UpdateFrequency" configured to "MediumFreq".How often is "MediumFreq" polled by Motor Pilot?Is it possible to configure the polling frequency in Motor Pilot?Thanks, 

Dear ST Team, I am currently working on a 24V @ 1.5A sensorless BLDC motor control application using the following setup: MCU Board: Nucleo-F401RE Driver Board: X-NUCLEO-IHM16M1 Motor: Sensorless BLDC MotorSoftware Tools: MC Workbench 6.4.0 and Motor Pilot Control Technique: Field-Oriented Control (Sensorless) Issues Observed: During startup, the motor produces loud noise,

Hello Everyone,I’m using sensorless FOC to control a BLDC motor with 3-shunt current sensing for closed-loop control. At startup, the motor slightly moves backward before starting to rotate in the correct (forward) direction. I understand this is likely due to the lack of initial rotor position information. There are no position or speed sensors involved—everything is handled via FOC and current feedback.I verified that 6-step control on the same hardware supports Initial Position Detection (IPD), although I haven’t tested it yet. That said, I am not switching to 6-step control. I want to stay with FOC and retain the 3-shunt topology for current sensing in closed-loop mode.My questions:Is there a way to prevent this backward motion using FOC only?If IP

[VERSION]: MCSDK6.4[TOOL]: MC Workbench6.4.0，   KEIL5， ST Motor PilotI am currently conducting an experiment where a quadrature encoder is used as the primary sensor and STO_PLL serves as the auxiliary sensor. During testing, after using Motor Pilot to acquire the waveforms of ENCODER_EL_ANGLE and STOPLL_EL_ANGLE, I observed that the two do not align. The motor can still run normally without any error reports. Have any of you encountered situations where the electrical angles of two sensors (ENCODER_EL_ANGLE and STOPLL_EL_ANGLE) fail to align? If so, could you share potential causes?The image below shows my test results；

Hello, @Peter BENSCH @Cristiana SCARAMEL @TDK @Amel NASRI I recently came across the easySPIN library for controlling a stepper motor using the L6474 driver. The library provides two board options: STEVAL_PCC009V2 and STM32_VL_Discovery.I am using the STEVAL_PCC009V2 code and have selected the STM32F103C8 as the target in uKeil. The code compiles successfully and flashes without any errors.I have connected SPI2 and other required pins (SCK, DIR, STBY_RESET, and FLAG) as defined in the easyspin.h file. However, the motor does not move.The main.c file contains motor functions such as eMotionControl_GoTo(-65);. I am attaching the relevant files for your reference. Kindly review and let me know if I am missing something.Thank you!

hello everybody:    l'm currently debugging the FOC motor with MC Workbench. Now I have generate the code with the open loop configuration. According to the user mannual, I can use the APIs in the code as follows:------------------------------------Firmware Usage via APIsStep 1 : Choose Open Loop mode using MCI_SetOpenLoopVoltageMode(&Mci[motorID]) or MCI_SetOpenLoopCurrentMode(&Mci[motorID]) functions (MCI_SetOpenLoopCurrent and MCI_SetOpenLoopVoltage should be considered as deprecated there will be removed in the future).Step 2 (Open Loop Voltage Mode only) : Set Voltage reference via OL_UpdateVoltage(&OpenLoop_ParamsMx,((Voltage_Reference * 32767) / 100)) function.Step 2 bis (Open Loop Current Mode only) : Set Current reference via MCI_SetCurrentRefe

Hello,I need you help . For implementing sensorless control of a PMSM motor using the STEVAL-IPM30B and STM32F407, how should their pins be connected? Should the control board's required feedback for voltage and current be directly connected from the given sensing points? 

I have a STSPIN32F0A board on which, I need support on below points1) Ability to operate the motor through LIN/PWM signal rather than an ADC signal, currently the EVAL board supports an ADC through an onboard potentiometer which I want to remove. 2) My current design is not able to move beyond 1.5A rms, whereas the design can support up to 15A rms, How to rectify this issue?

Hi, I'm trying to profile a motor on the latest firmware. I can't get the latest firmware to build with the profiler enabled and get a series of issues related to arm_math.h.Are there any known fixes to this or are there any significant downsides to using the recommended earlier firmware version. Any help would be appreciated,Thanks!

 I am using the Nucleo-IHM17M1 and Nucleo-F401RE to evaluate a high-speed drone motor (22,000KV) with sensorless drive. I am particularly interested in the Motor Profiler function, since some key motor parameters are not provided by the manufacturer. However, whenever I open Motor Workbench with Motor Profiler (version 6.4.0) and attempt to connect, I consistently receive a firmware error message. I have reviewed the specification sheet, which confirms that these boards are supposed to be compatible. Could you suggest any possible reasons for this issue, or recommend any other compatible boards for profiling sensorless BLDC drone motors?Thank you very much!

 I can't increase the motor speed beyond a certain point.For example, when using the ST Motor Pilot interface, I set the Speed Reference variable to 2500 RPM, and the Mechanical Speed reaches approximately the same value (2495 RPM). However, when I increase the Speed Reference beyond 2500 RPM, the Mechanical Speed does not increase and remains the same.MCU: STM32G431RBPower Board: STEVAL-IHM023V3NOT :I increased the motor's nominal current using MC Workbench, but I didn't notice any change in speed.[VERSION]: MCSDK6.3.2 (latest version for all tools)[TOOL]: MC WB[

Hello,I bought the STM32 Nucleo Pack with the Nucleo-F302R8, the X-Nucleo-IHM07M1 and a three-phase motor.I use MCSDK to control my motor and it's no problem.But when I want to add an external potentiometer to the ADC, I can't get the values from it.I've tried lots of things, but nothing works.To be sure of my potentiometer and my program, I tried with a simple program that doesn't use MCSDK, and everything worked perfectly. Here is the configuration of my MX_ADC1_Init with mcsdk activated: static void MX_ADC1_Init(void) { /* USER CODE BEGIN ADC1_Init 0 */ /* USER CODE END ADC1_Init 0 */ ADC_AnalogWDGConfTypeDef AnalogWDGConfig = {0}; ADC_InjectionConfTypeDef sConfigInjected = {0}; ADC_ChannelConfTypeDef sConfig = {0}; /* USER CODE BEGIN ADC1_Init 1 */ /* USER CODE END ADC1_Init 1 */ /** Common config */ hadc1.Instance = ADC1; hadc1.Init.ClockP

Hello All,I'm using VNH707AY motor driver to drive 2 motors separately i want to interface with my STM32Can anyone share the schematic or  references for the same which can help me in this.Thanks & Best Regards,Sakshi 

Hello,I have a custom Board based on the evspin32g4 dual, what Values should i put in "Charge Boot Capacitor Time" and "Charge Boot Capacitor Duty" in the motor control workbench?

The single-resistance mode of the current sensor can generate successfully, while the three-resistance mode fails to generate Software version:MCSDK 6.4.0 CUBEMX 6.14.1CUBEFW 1.28.2  log2025-07-04 10:29:20,884 DEBUG [WB_to_MX.lambda$run_gui_mode$0] Arguments: [-mx_timeout, -1, -pack, assets/MotorControlPack/MotorControl.zip, -exp, templates/wb-defines_where_and_what.txt, -ftl, templates/wb_ioc_template.ftl, -xdm, F:\06.Code\FOC\STMC2M\STMC2M.wbdef, -ioc, F:\06.Code\FOC\STMC2M\STMC2M.ioc] 2025-07-04 10:29:20,885

Hi team,I had made project on Motor control workbench in 5.4.8 where i get serial communication to check the parameter.if i work on 5.Y.4 where serial port is not active, then how to activate the serial port in 5.Y.4?if i import the 5.4.8 project in 5.Y.4 then the API is not matched. if i maually type the code in IDE then also 5.4.8 & 5.Y.4 parameters may changed.can i use same drive_parameters.h and pmsm_parameters.h in 5.Y.4 ? observer & PLL?The API is same for 5.4.8 & 5.Y.4 or different? if different then what to do to checkIf i run the motor in 5.4.8 with same parameter with the debugger in IDE, then debugger gets disconnected and i cannot debug the fault.Please help into thisRegards,Amol S.Email ID : amol.shinde@aplosventures.com