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Hi, Could you please explain the proper command sequence for smoothly transitioning a motor from Forward to Reverse operation?Currently, my sequence is:STOP → DIR → SET_SPEEDThis assumes the STOP command was issued while the motor was already in the RUNNING state. However, with this sequence, the motor will not reverse direction. The only sequence that consistently works is:STOP → DIR → START → SET_SPEEDWhile this does reverse the motor, I'm running into another issue: every time I issue a START command (this applies at any given point in time), the motor immediately accelerates to approximately 2000 RPM before settling. After that, SET_SPEED commands work as expected.Is there a recommended sequence for changing direction, or is there something I may be overlooking in my implementation?Any input would be greatly appreciated.Thanks. 

Hello ! I need to replace a burnt-out AL100BXP component! I can't find a retailer anywhere. Is there a compatible component or a supplier that might stock it? Looking forward to any information—thanks

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I need help in interfacing STM8S208 with BU97530 LCD driver IC

I am currently using the NUCLEO-H7S3L8 CN2 Type-C port as a USB_OTG_HS embedded PHY host/source.The TCPP03 source path opens successfully, and both the USB stick attachment and port reset are working. After the reset, HPRT reads 0x00001005, which seems to indicate speed=HS and that the port is enabled.However, during the first EP0 SETUP GET_DESCRIPTOR request: HAL_HCD_HC_SubmitRequest() = HAL_OK HAINT = 0x00000001 HCINT = 0x00000080 TXERR = 1 xfer_count = 0 The exact same issue occurs even during a raw HAL EP0 smoke test, prior to involving USBX/FileX.I would like to verify the following points: What is the mandatory clock/power initialization sequence when using the USB_OTG_HS embedded PHY host on the H7S3L8? Is it acceptable to use HSI → PLL3Q for the USBPHYC clock, or is an HSE strictly required? What are the necessary settle/wait conditions after enabling USBHSREG? Are there any required CC/UCPD configurations for the CN2 Type-C/TCPP03 source setup, apart from the PM9

I am working on a project to drive a door using a PMSM motor in position control mode. I am trying to add an emergency brake function. In an emergency, when the operator pushes a button, motor should brake and then return to its starting position without harming anyone.I know there is PWMC_TurnOnLowSides() function (https://community.st.com/t5/stm32-mcus-motor-control/how-can-i-stop-the-motor-urgently/m-p/597309#M8287 ). But it is just stopping the motor, not braking. I have tried this function.As far as I know, there is no such API in position control mode.If I am wrong, is there an API to brake the motor in an emergency? Can anyone help me? Do you have any advice for me?Any information you provide will be welcomed.   Project:ST MCW Ver             : 6.3.2STM32CubeIDE Ver : 1.18.1Driving algorithm      : FOCControl board            : Nucleo-G474REPower board        &

Hello Team,I want to store Binary files in STlink-V3 Or any other model , to flash the target on the field without host PC / Cube Programmer.I came to know , this device model has Bianary / hex file drag and drop feater , would it helpful in my scenario ?If not , Suggets any other option. 

Hi!I think there is some display issues with STM32CubeMX with the cr_ker_ltdc If I look in the clock summary, I csn see that the ck_ker_ltdc is set to 100 MHz."ck_flexgen_27 0 0 0 100000000 0 0 0 Y deviceless no_connection_id             ck_ker_ltdc 0 0 0 100000000 0 0 50000 N 48010000.display-controller lcd                                                                                                                                    48000000.dsi px_clk                                                                                                                                 deviceless no_connection_id                clk_pix_ltdc 0 0 0 100000000 0 0 50000 Y 48010000.display-controller ref                                                                                                                                       deviceless no_connection_id         "In this case, I need to increase the cr_pix_ltdc to above 148.5 MHz to achieve full HD at the HDMI output.But in the CubeMX,

Hello dear customers, We understand that many of you are experiencing difficulties integrating the STM32 extension into the DevContainer environment. Specifically, the extension is not functioning correctly due to a dependency issue message displayed in VSCode. This problem arises from an extension installation issue within VSCode. Issue and fix When installing an extension and creating a DevContainer the extension is not automatically installed /imported to the DevContainerTo add the needed extensions, you need to click on the cloud icon and select the extensions to be added to the DevContainer.   Second issue after clicking on this icon, the install process on the DevContainer is not stable, sometimes you may need to relaunch the process twice or three times to have all your extensions installed. Third issue after adding all the needed extensions to the DevContainer, you may not be able to use them as VSCode is prioritizing the local installed one, so you must disable the lo

Hello,Has anyone seen ACTCLF permanently stuck at 0 on STM32N6 despite a confirmed HS clock at the input?I have had issues with this for some time and need a little help. Pehraps the following questions could be enligtning.Are there SNPS D-PHY initialization or calibration steps for the clock lane beyond what HAL_DCMIPP_CSI_SetConfig performs? Clock-lane equivalents of the 0xe2–0xe4 DDL registers? Can ST confirm the CSI kernel clock (IC18) is the D-PHY cfg_clk, and its required range? The CCFR encoding caps at ~33 MHz and the DK example uses 20 MHz, but we couldn't find this constraint stated in RM0486. Is PTSR being permanently 0 expected on this silicon? Is there any way to verify test-interface writes landed? What exactly are the conditions for ACTCLF to assert? Does the RX require observing a complete LP-11 to LP-01 to LP-00 entry sequence after PEN, and is there a known failure mode if the LP levels at the pad are degraded (e.g., loaded by an external common-mode filter) while HS

Hello,(ST-LINK + CubeProgrammer UART/USB both failing)I am using a NUCLEO-N657X0-Q board. I cannot flashing my code via the ST-Link ( ST-Link windows driver is installed and detected through device manager and I had already updated the stlink). it throws this error:STMicroelectronics ST-LINK GDB server. Version 7.11.0Copyright (c) 2025, STMicroelectronics. All rights reserved. Starting server with the following options:Persistent Mode : DisabledLogging Level : 1Listen Port Number : 61234Status Refresh Delay : 15sVerbose Mode : DisabledSWD Debug : EnabledInitWhile : Enabled Target unknown error 32 Error in initializing ST-LINK device.Reason: Unknown. Please check power and cabling to target.Then tried with CubeProgrammer to connect via STlink but it connects then quickly drops , here is the log :17:22:24 : STM32CubeProgrammer API v2.20.0 | Windows-64Bits17:22:39 : UR connection mode is defined with the HWrst reset mode17:22:40 : UR connection mode is defined with the HWrs

Hello, We’re trying to program a STM32WBA23KE controller using SPI. We use the same function for STM32WB10 over SPI and it works.We’ve connected the SPI bootloader pins PA0/PA5/PB8/PB9 according to AN2606, where it mentions these are the pins used for QFN32 packages.We’ve also replaced an older part with an old date code to date code 620 because of the bootloader issue mentioned in the errata (should have been fixed since date code 614).We also have the PH3-BOOT0 pin connected and the NRESET. Still, we can’t get the bootloader to respond to the SPI sync command. What are we missing?

I create one project for STM32F401 DMA-TIM4_PWM, so far first DMA work, but it didn’t go to handle routing.After debug with Copilot help, find after DMA finish(set DMA_S0CR bit 0 to 1), the ISPR0 bit 11 set to 1, (it related with DMA1-s0.) but code didn’t jump to the vector in 0x6C (DMA1-so interrupt handle).If add one line force ISR0 bit 11 to 1, (NVIC->ISPR[0] = (1 << 11);),  IABR0 bit 11 set to 1. jump to handle routing.Why manual set work, use DMA_S0CR bit 0 to 1 doesn’t work (it same set  ISR0 bit 11 to 1 as manual.)?

Hello,I designed a custom 4-layer PCB using STM32WB55CGU6. After assembly, ST-LINK cannot detect the MCU.ST-LINK connection:- SWDIO connected to MCU SWDIO pin- SWCLK connected to MCU SWCLK pin- GND connected- Target VCC connected- ST-LINK reports target voltage around 3.25 V- Error message:  "Unable to get core ID"  "No STM32 target found"Main symptoms:1. The board has 3.25 V on the 3V3 rail.2. ST-LINK cannot connect to the MCU.3. PA10 is configured as GPIO output high to drive LED1, but PA10 voltage is only about 2.18 V.   - R8 MCU side: 2.18 V   - R8 LED side: 2.15 V4. The same firmware works on another known-good board.5. I replaced the STM32WB55CGU6 with a known-good chip, but the issue remains.   The removed chip still works on another board, so the MCU itself does not seem damaged.6. Current consumption comparison:   - Known-good board: about 23 mA   - Problem board: about 9.2 mA   - Known-good board while holding RESET: about 12 mA   - Problem board while holding RESET: about 3

i am using stm32h753zi and stmcubeide is 1.10.1 .the eth dx and rx is 30000000 and 30000200 and heap is 30044000 and rcc- bypass and used tim6  .i did it like the examples and i got no out and finally got a working code from claude, but it works only untill the power line is connected after i remove and reconnect it stopped working or works for one ping and stops .i thought may be it was beacause i used ramd2 and used ramd1 it also stops working when this stops.someone pls help me fix this i am willing to start from scratch lwip i used static ip address and pc is in same subnet/* USER CODE BEGIN Header *//** ****************************************************************************** * @file : main.c * @brief : Main program body ****************************************************************************** * @attention * * Copyright (c) 2026 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that can be found in the LICEN

HelloAs I am trying to connect the STM32N6570-DK board on the STM32CubeProgrammer, initially the STM32CubeProgrammer recognises my device as in the following picture: When I press Connect on the STM32CubeProgrammer I get awarning: Connection to device 0x486 is lostas in the following picture: and then an error that says Data read failas in the following picture: I am using a MacBook Air M3, 2024, but even on windows (running on a virtual machine) I get the same error on the STM32CubeProgrammer windows version.Is there a way to overcome this issue? What could be the cause? Thank you 

 Hi , Subject: i need to reduce the log write time what to do I have an STM32H503 logging ~20 bytes per line (HH:MM:SS , X.X) to a 24Cxx EEPROM over I2C @ 400 kHz, with FAT12 + USB MSC.Blocking time = the main loop stalls ~100–200 ms on each append while EEPROM writes finish.Each line only adds ~20 B of text, but my FAT code does full 512 B sector read-modify-write on the data sector, again on the root directory (file size), plus metadata read/write.That’s ~1 KB+ programmed per line (many 64 B page programs), so EEPROM ACK/program time dominates — not the 20 B payload or I2C speed alone.Basic issue: small appends through sector-based FAT on page EEPROM → huge writes per line.I’m thinking: defer root/meta to session end (back button), RAM cache, write only dirty 64 B pages.Is that the right fix? Can others get ~20–50 ms/line on 24Cxx without dropping FAT?

 As per my custom board pins(I am using single QUADSPI STR) I have selected and i tried to flash via Cube-Programmer CLIVEONE - MT25QL512_STM32H7XX-PB2-PB10-PF8-PF9-PF7-PF6.stldrhttps://github.com/cturvey/stm32extldr/blob/main/h7_mt25ql512a/CLIVEONE-MT25QL512_STM32H7XX-PB2-PB10-PF8-PF9-PF7-PF6.stldrISSUE : flash protection enabled https://github.com/cturvey/stm32extldr/tree/main/h7_mt25ql512aISSUE: I have tried with this external loader but i am not able to erase memory ​

Dear Sir/Madam,I hope this email finds you well.I am currently working on the development and integration of the ECU project using the SPC5Studio environment and the Wind River Diab Compiler (v5.9.4). During the build configuration and linker script optimization for the SPC56 platform, we have identified a need for specific integration assets.Could you please provide the following files to assist us in completing our toolchain setup:SPC560Dxx_RLA PIT WINDRIVER.zip: Required for the PIT (Periodic Interrupt Timer) driver configuration and OS abstraction alignment with the Diab compiler. 56xx_flash.dld: The specific Linker Definition File (LDF) optimized for the Wind River Diab toolchain to ensure correct memory mapping and flash sectoring.These files are critical for resolving current build-time linker errors and ensuring compatibility between the RLA (Runtime Lightweight Abstraction) components and our compiler version.Thank you in advance for your assistance. I look forward to your pro

in debugging mode the values of variables gets corrupted when I check in live expressions. Here corrupted means shows wrong values.

When I compile my code, I get strange errors that make no sense.#define ADC_BUFFER 1000 gives error "expected declaration specifiers or '...' before numeric constant"even though the line above it #define ADC_HIGH_THRESHOLD 3500 doesn't generate an error.HAL_TIM_Base_Start(&htim3); and HAL_ADC_Start_DMA(&hadc1, (uint32_t*)adc_buffer, ADC_BUFFER); both generate "Syntax error".The TIM and ADC Start errors expanded error message is:  error: expected declaration specifiers or '...' before '&' token /* USER CODE END Header *//* Includes ------------------------------------------------------------------*/#include "main.h"/* Private includes ----------------------------------------------------------*//* USER CODE BEGIN Includes */#include <stdlib.h>#include <stdio.h>#include <stdbool.h>#include <stdint.h>#include <inttypes.h>#include "globals.h"/* USER CODE END Includes *//* Private typedef -----------------------------------------------------------*//

I’m creating a project for NUCLEO-144 (STM32H563ZIT6)and I’m using STM32CubeIDE for Build/Debug.After reading various guides from the Web, I have still notbeen able to see any Console output (trying to use printf()and re-directing the character output with this: int _write(int file, char *ptr, int len){     for (int i = 0; i < len; i++)     {          ITM_SendChar((*ptr++));     }     return len;} Is there an esoteric Config in the IDE that I need to Enable (or Disable)?Have I missed some important item in the Project Creation? (I had used STM32CubeMX)Guidance appreciated!Paul++ 

 The IssueI'm using **nanoMODBUS** (slave mode) on NUCLEO-F446RE via USART2 (115200 baud, 8N1). The slave exposes two holding registers:- `0x0000`: Potentiometer value (read-only) → `usPotValue`- `0x0001`: LED brightness (read/write) → `usLedBrightness`**The LED is controlled via PWM (TIM2).**BehaviorOperation                                                           Result **Write to `0x0001`** (set LED brightness)      Works consistently — LED dims **Read from `0x0000`** (potentiometer)          Fails most of the time **Read from `0x0001`** (LED brightness)        Fails most of the time **Rare successful read**                                  Both registers return correct values Master Log```Response: emptyResponse: emptyRead OK: [609]              ← Rare successResponse: emptyResponse: emptyResponse: 0180018000         ← Truncated exception (5 bytes instead of 7+)Response: emptyRead OK: [609]              ← Another rare success```The 5-byte response `0180018000`- `01` = Slave addre

Hello,while testing 6 types of SPI NAND with MP257, I found no 1V8 part boots (tested 2, MT29F4G01ABB and AS5F18G04SND). While looking at scope traces, 32MHz clock from BootROM is almost sinusoidal.I tested booting from Engineering mode and custom BL, it boots Linux as 21MHz but not at 32MHz. IOSPEED is set to “2” (tested 3 too).Then I set bit 14 in OTP 124 (allow for <2.5V for VDDIO3) and then set PWR->CR1 VDDIO3VRSEL too. Now, it boots with 32MHz from my BL (with IOSPEED 2) and clock now seems much nicer.But BootROM seems to ignore OTP 124 and tries to use 32MHz with 1V8 and GPIO in degraded mode.Is there way to make 1V8 OSPI boot work ? Force ROM to either use slower clock or to set VDDIO3VRSEL.Thanks, Martin

I have an STM32U575 MCU with the PH3/BOOT0 pin permanently pulled down to ground. I need to develop a process to flash a proprietary bootloader to fresh boards (ie. the flash is blank) with this configuration. I am currently using STM32CubeProgrammer to connect to a NUCLEO-U575ZI-Q with an external STLINK-V3 over UART/I2C to simulate this process. Even when the board has been reset and the flash is empty, the board does not jump to the system bootloader unless I drive PH3/BOOT0 high. Is the STM32U575 supposed to automatically run the system bootloader when the flash is empty, or will my inability to drive PH3/BOOT0 high on my product prevent me from accessing the system bootloader?