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Greetings,I have a project on the Nucleo F767ZI board where I try to send a CAN message to another device (in particular, an Maxon EPOS4 Compact 50/5 drive). I can receive messages from this device with no problem, however, as soon as I press the button to start sending messages from the Nucleo board to that device, the drive enters into fault state, allegedly because of a 'CAN passive mode error', which arises because of a bad network configuration or baud rate setting. The Nucleo can still receive messages with no problem after this happens.I have checked the H/L connections with a scope, and can see that there is data coming from both devices. My setup is as follows:Hardware Setup:Nucleo board connected to CAN_H/_L through a TJA1050 transceiver board (schematic attached)120 Ohm termination resistor in both the TJA board as well in the other device (resistor in the EPOS drive). I get a 60 Ohm reading between H and L when using a multimeter, as expected.Connected device powered b

If the TDA bit is not set to “1” even once after 400ms has passed after the sensor is turned on, is it likely that the startup has failed?

Hello everyone,I'm currently working with the STM32WBA65RI Nucleo board.For my upcoming application, I require a stable BLE throughput of over 800 kbps. However, using the provided example, I can only achieve around 600 kbps.So far:I'm using an MTU of 244 bytes.2M PHY Manage to minimize connection interval : 11.25 ms when using the ST BLE Toolbox app, and 7.5 ms when using a custom script on Windows.I’ve tested with several smartphones/ configuration and also tried increasing the MCU clock, but none of these changes improved the performance significantly.Has anyone managed to achieve a higher throughput with this setup or found effective optimizations?Thanks in advance for any insights.

Hi, I have been trying to deploy simple neural networks.tflite on the STM32 N657X0 board, by applying the XCUBEAI, running under NPU.While, I have not made it work yet. If anyone has such project or docs to share, It would be highly appreciated. Best,Han

Hi everyone,Im currently trying to use SPI with DMA mode on STM32U031G6 with an S2LP,In this specific case I want to obtain the number of bytes present in my FIFO (10 bytes here), but the problem is that my reading through DMA mode does not work.Below is the data that I analyze in SPI using a logic analyzer : we have the read command (0x01) + the FIFO status command (0x90) + the command (0x00) where I get my response 0x0A or my 10 bytes. What I don't understand is that the read_1_registre_DMA function returns 1 on the 3rd data item that I want to read as below :Below is the function where I give my 3 Tx commands and where I expect 3 responses in return for Rx but the data is not correct for RX[2] (3rd element, or for me I should find my 0xA)://----------------------------------------------------------------------------- uint8_t S2LP_Read1Registre (uint8_t address) //----------------------------------------------------------------------------- { S2LP_Init_DMA_Mode(); // Pré

Hi.I'm working on stm32wb for some time, handling CPU2 updates of BLE stack application.Lately, version 1.23 was published with new FUS version, so I tried updating it with my application running on user flash. I searched for the magic word but I found something strange, empty word in the middle of the footer:I compared it to previous version and it appear there also.As described in AN5185, magic word is placed after FW version, so what am I missing?Any help is welcome.Thanks in advance.

I upgraded STLINK-Utility under Windows 10 from 4.5 to 4.6. It doesn't connect to the DISCOVERY board STM32F407G-DISC1. In the settings it says: "Old ST-LINK firmware/ST-LINK already used". Everything else is greyed out.Can I download version 4.5 still somewhere?

Why the ST website is always like this since 6 years ago?? It's always a nightmare for me and my colleagues to download a simple file from the ST website. For example right now I'm struggling with downloading the STM32CubeCLT-Win and still no chance. Please do something about it, just look how many people are complaining about the website day by day.

Hello Team,We are currently attempting to perform a silent installation/uninstallation for the application “SetupSTM32CubeProgrammer_win64.exe” on our Windows 11 devices to meet business requirements. Despite trying multiple silent parameters and installation switches, the installer continue to launch in interactive mode but does not proceed silently. This installation is required to support ongoing business operations, and we would appreciate your guidance or confirmation on whether silent installation method is available for this package. Kindly advise us on the recommended approach or provide alternative solutions to help us to achieve this.Thanks

Hello,I'm in the process of moving from MP1 to MP2 on my device. The latter, used STPMIC1 that suffered the startup problem as described in AN5861 and I had to go thru a re-design to include the latching circuit on my PCBA.Can anybody confirm that this issue is gone for STPMIC25 that I will use for MP2?Thanks in advance,Daniel

I'm trying to get the Debug Authentication provisioning to work. I managed to write it from within the application, but then I found the errata sheet(es0565-stm32h562xx563xx573xx-device-errata-stmicroelectronics.pdf) which states otherwise:"Chapter 2.2.35: Debug Authentication provisioning cannot be done from the application when TZEN is disabled" I tried to do the provisioning with RSSLib->DataProvisioning(), as mentioned in the errata sheet, but I end up getting a hardfault.I'm using the nucleo-h536zi-board, trustzone is disabled.  RSSLIB_DataProvisioningConf_t a; a.pSource = sData; a.pDestination = (uint32_t *) (0x0FFD0100); a.Size = 0x60; a.DoEncryption = 0xCACA0AA0U; a.Crc = 0; uint32_t c = RSSLIB_PFUNC->NSC.DataProvisioning(&a);Since the CRC is not correct, I expect to get the CRC error instead of a hard fault. Is there something I need to set up before calling DataProvisioning? I tried to find an example, is there one somewhere?

Hi, Every time I try to connect the eval kit to the GUI I get this error:This board doesn't reply properly to connect !Can anyone tell me how to solve this problem.  I have made sure that the correct COM Port and baud rate is selected. Also, the power indicator LED is ON and the RED LED is flashing. Your help is greatly appreciated.Regards,

Hi all,I’m currently using the EVSPIN32G4 development board for a drone project. I’m controlling motor forward and reverse using ST Motor Pilot.I’ve noticed that when switching from forward to reverse, there’s a short pause before the motor starts spinning in the opposite direction.Is there a way to implement a seamless transition between forward and reverse motion so that the motor can switch direction without this stop?Thanks in advance for your guidance!

What is the sequence and APIs to erase and program the Engineering bytes?There are APIs to handle Main flash, and APIs to handle OTP, but it is not clear how the Engineering bytes should be handled.Thanks

Hello everyone,I’m working with an STM32WB55 microcontroller with BLE stack. I use also low-power modes in my app. Before entering a low-power mode, I set an RTC ALARM_A to wake the system up at a specific time. The device then enters either Sleep or STOP2 mode with the RTC enabled.However, I’m noticing an issue where, when in these low-power modes, the RTC ALARM_A does not seem to wake the device as expected. The timing appears to freeze or behave unpredictably, and the alarm sometimes triggers late or not at all.Here is the output just before entering sleep mode with the configured alarm:Current time vs Alarm RTC Settings:(PREDIV_S = maximal SubSec = 32000)| Field | Current (Cur) | Alarm (Alm) ||------------|------------|--------|| SubSec | 7234     |  6594|| Sec       | 21          | 21      || Min       | 0            | 0        || Hr

Hello @Community, I am working on the STM32F746NG board. In my application, I want to communicate with a PLC using the EtherNet/IP communication protocol to exchange real-time data. The problem I am facing is that my board does not respond to ping when FreeRTOS is enabled. Without FreeRTOS, the board is pinging correctly. Has anyone faced this issue before? If yes, please guide me on how to resolve it. Any suggestions or solutions will be greatly appreciated. Thank you!

Hello,i am working with the STM32F401RE board along with the IHM02A1 expansion board. I am using the X-CUBE-SPN2 package.I am working with a predefined project from X-CUBE-SPN2 and modifying it according to my requirements. I am defining all the GPIO pins, using some as input and some as output.However, I am facing a problem with GPIO pins PA13 and PA14. These pins are used for the debugger by default. I do not want to use the debugger and instead want to use these pins as input/output.I want to know how to disable the debug function for these pins and directly flash the program to the board. I have also tried using the “green icon” menu to flash, but it is not working.This is quite urgent. I would really appreciate your guidance on how to resolve this issue.Thank you so much in advance.

Hello, I am working on simple program to read ADC using the STM32u585QII microcontroller. I am using polling method in Scan mode on 4 channels. All set as 14 bit but understood the readin will be in 12 bit. The problem is the values I am getting are not reflecting the real value at the input. I am receiving something like  1586 cnts on 1st and 3rd channel and 2395 cnts on 2nd and 4th channel. Values make no sense assuming I have stable (verified with oscilloscope) voltage 1.61V. Vref is 2.5V external. Also when I am trying change voltage at the inputs the reading doesn't change. Can someone point me the possible issue with the configuration. /* USER CODE BEGIN Header */ /** ****************************************************************************** * @file : main.c * @brief : Main program body ****************************************************************************** * @attention * * Copyright (c) 2025 STMicroelectronics. * All rights reserved. * * This software i

Hello,I need to communicate with a component whose configuration register expects a 9-bit value. However, my current SPI setup sends data in 8-bit chunks.In this case, what would be the correct approach? Should I send two bytes back-to-back? Or would it be better to make this configurable in main.c so that the behavior can be adjusted easily?If you were in my place, how would you handle this?   static void MX_SPI3_Init(uint32_t bit_size) { /* USER CODE BEGIN SPI3_Init 0 */ /* USER CODE END SPI3_Init 0 */ /* USER CODE BEGIN SPI3_Init 1 */ /* USER CODE END SPI3_Init 1 */ /* SPI3 parameter configuration*/ hspi3.Instance = SPI3; hspi3.Init.Mode = SPI_MODE_MASTER; hspi3.Init.Direction = SPI_DIRECTION_2LINES; hspi3.Init.DataSize = bit_size; // <-- here hspi3.Init.CLKPolarity = SPI_POLARITY_LOW; hspi3.Init.CLKPhase = SPI_PHASE_1EDGE; hspi3.Init.NSS = SPI_NSS_SOFT; hspi3.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_8; hspi3.Init.FirstBit = SPI_FIRSTBIT_MSB

Hello,I have a NUCLEO-L476RG and after update the firmware of the ST-Link V2.1 embedded on the board, stops to communicate. I want to know if it's possible to downgrade this firmware. If yes, how can i do the downgrade?Thanks!!!

When the MCU is placed in Standby Mode, where does the CPU begin to execute when exiting the mode? (for example, on an RTC event)  Is it a reset or a return from interrupt?  RM0394 isn't clear on this. 

Hello,I am currently trying to modify the schematic of the X-NUCLEO-NFC08A1 to support the connection of any commercial NFC antenna.From my understanding, I need to add a standard RF connector (SMA/U.FL/IPEX, etc.). Since commercial antennas are typically designed with a 50-ohm impedance, I believe the matching network may need to be redesigned as well. However, I am new to PCB and RF design, so I am not very experienced yet.I would greatly appreciate any guidance or advice on the basic steps to achieve this. If there are any relevant reference documents or application notes, I would be very thankful if you could share them.Thank you!

Hi all, I am trying to use FDCAN with Baud rate switch (500 kB / 2 MBit) activated and I want to send 64 Byte. Processor is STM32H7A3. Project was set up with CubeMX V. 6.11.1 and HAL FW_H7 V1.11.2. Clock for FDCAN is 80 MHz.   The problem is that the system only sends with 500 kB and 8 Bytes only. I am transmitting the data to my PC using a PEAK USB dongle (FDCAN capable with BRS) and in parallel check the messages on a scope.  I don't know, why it doesn't switch to 2 MBit and I only see  8 Bytes with 500 kBit on my scope and on PCAN-Explorer. Here my init and transmit code sequences: FDCAN_HandleTypeDef* phCan; phCan = &hfdcan1; phCan->Instance = FDCAN1; phCan->Init.Mode = FDCAN_MODE_NORMAL; phCan->Init.FrameFormat = FDCAN_FRAME_FD_BRS; phCan->Init.AutoRetransmission = ENABLE; phCan->Init.TransmitPause = DISABLE; phCan->Init.NominalPrescaler = 10; phCan->Init.NominalSyncJumpWidth = 1; phCan->Init.NominalTimeSeg1 = 11; phCan->Init.No

Hi，I would like to in-live upgrade firmware of STM32F407 through USART1, that means  in-application program(IAP) . If I remember right, there need a trigger signal from key meanwhile NRST is low.My question is that the Key signal could be connected to any GPIO I/O of STM32F407 except those dedicated pin, right?  Is there special point to care about selection of  Key I/O pin? Thanks in advance!Best regards!Jason

What is the difference between STM32F411VEH6U and STM32F411VEH6? What does the suffix U mean?