STM32 MCUs

Hello,in our application, running on a H533RET6 and with no TZ enabled, we need to close debug ports in production.I preliminarly did some tests using CubeProgrammer: I generated password-based credentials (obk+bin files, which as far as I understand from AN6008 is the only option when not in TZ) and successfully managed to lock the device by moving from PRODUCT_STATE Open (0xED) to Provisioning (0x17), supplying the .obk file and then lock the device (PRODUCT_STATE = 0x72). After verifying that debug ports were closed, I unlocked the device by making a discovery and providing the bin file, with the device returning into Open state. Note that the first 3 32-bit words of my obk file are:0x00, 0x01, 0xfd, 0x0f, 0x60, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00Showing that the address base is the secure OBK base address and that  the encryption is on (as it should be in my device, again as far as I understand).So far so good, but know I would like to move at least the encryption process

 My ST32N6 Discovery apparently works very well, however, when I enter the AI ​​demo, the camera screen goes black, and two red LEDs light up on the RGB LEDs next to the connector.If I remove the camera, the DEMO alerts that there is no camera.There is no LED on the camera module to indicate its status.Are there any tests I can do to check if the camera is damaged?Unfortunately, I can no longer return it, as it has been more than 60 days since I received it and only today was I able to take the time to do a more in-depth study of the camera.

I'm trying to enable USART transmission (TX only for now) via DMA, but when I call HAL_UART_Transmit_DMA, the transfer doesn't seem to start at all and HAL_UART_TxCpltCallback is never called.I've configured everything through CubeMX: enabled USART with DMA, enabled FreeRTOS, and enabled interrupts. Without DMA, transmission works fine using HAL_UART_Transmit, but when I switch to HAL_UART_Transmit_DMA, nothing happens.I can't figure out what the problem might be. Does anyone have any suggestions?Here's my main code:/* 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 LICENSE file * in the root directory of this software component. * If no LICENSE fi

Dear Sir/Madam,We used the STM32F072C8T6 processor in a project we carried out for the railway sector, and as stated in the link below, we currently need a SIL certificate to be able to submit it to the auditing firm.Link: https://www.st.com/resource/en/product_presentation/stm32_stm8_functional-safety-packages.pdf

With CubeIDE 1.x iterative development is simple1 Start CubeIDE and create new project. It is possible to select C++ project option at project start (without any effect)2 With Device Configuration Tool create initial perifery config. It is possible to open second windows for it and have two separate windows side by side. Generate code.3 Switch to first window and work with generated code4 If need new device, switcn to second window, add new device, config it and generate code.5 In first window regenerated code is created in sync with Configuration Tool. Convenient and logical steps. Great work!How iterative development can be done with CubeIDE 2.0? 

What I want to achieve:During startup all code is verified, starting with SMiRoT (as root-of-trust) then SMuRoT, then SecureManager then non-secure application.If the application has been modified (vberification fails) the startup shall end in system bootloader.Unfortunately, this does not work as our tampered/modified non-secure application is still started/executed instead of jumping into bootloader.Secure manager is installed with the provisioning script. We have modified the BOOT_UBE setting via TrustedPackageCreator from 0xB4 (OEM-iRoT - user flash) to 0xC3 (ST-iRoT - system flash) and re-generated Option_Bytes.csvWhat I see is that when connecting the STM32CubeProgrammer, the value for BOOT_UBE still shows 0xB4.And in the log during SFI flashing (provisioning.py -v --sfi-flash) it shows this:DEBUG - Warning: Option Byte: BOOT_UBE, value: 0xB4, was not modified.DEBUG - Warning: Option Bytes are unchanged, Data won't be downloadedDEBUG - Time elapsed during option Bytes config

Good day  I am currently trying to run the end_node sample located on the STM32Cube_FW_WL_V1.3.1 package.  I would like to know if i can have some guideline on how to use LmHandlerDeviceTimeReq().  Which class do i need to use?What lora server allows the time request?How do i check if the MAC request is even sending?  Should I see this on the Logs under my application located on the server?The request currently is not updating my system time.  The request is currently being done in a callback after a successful join. static void OnJoinRequest(LmHandlerJoinParams_t *joinParams){/* USER CODE BEGIN OnJoinRequest_1 */if (joinParams->Status == LORAMAC_HANDLER_SUCCESS){APP_LOG(TS_ON, VLEVEL_L, "JOINED\n"); // Send time requestif (LmHandlerDeviceTimeReq() == LORAMAC_HANDLER_SUCCESS){APP_LOG(TS_ON, VLEVEL_L, "DeviceTimeReq sent.\n");}}/* USER CODE END OnJoinRequest_1 */}After the request is sent successfully, the below lines are never r

I am trying to build the readily given Nx_webserver project , i had selected the given example and just change the tool chain to STMcube IDE inorder to build the project with the cube ide after redirection to the cube IDE i just click on the build , it ends up with the following error: Spoiler (Highlight to read)12:03:20 **** Build of configuration Debug for project Nx_WebServer_FSBL ****make -j8 all arm-none-eabi-gcc "C:/Users/admin/STM32Cube/Example/Nx_WebServer/Middlewares/ST/threadx/common/src/tx_block_pool_performance_info_get.c" -mcpu=cortex-m55 -std=gnu11 -g3 -DRTL8211_INIT_TO=10000 -DETH_PHY_1000MBITS_SUPPORTED -DDEBUG -DUSE_HAL_DRIVER -DSTM32N657xx -DFX_INCLUDE_USER_DEFINE_FILE -DNX_INCLUDE_USER_DEFINE_FILE -DTX_INCLUDE_USER_DEFINE_FILE -DTX_SINGLE_MODE_SECURE=1 -c -I../../../Middlewares/ST/netxduo/ports/cortex_m55/gnu/inc -I../../../Middlewares/ST/threadx/ports/cortex_m55/gnu/inc -O0 -ffunction-sections -fdata-sections -Wall -fstack-usage -fcyclomatic-complexity -mcmse -

Hello ST Community,I am working on an industrial combo vending machine controller system and would like to request a design review / best-practice feedback for an architecture based on STM32H563ZIT6.System OverviewMCU: STM32H563ZIT6 @ 200 MHzOperation: Industrial application, 24×7 continuous operationArchitecture:Main / Process ControllerStepper Motor ControllerDC Load ControllerEach controller uses a dedicated STM32 MCU to separate process logic, real-time motor control, and power load handling.1. Main Controller – CPU Load & Memory UtilizationMultiple interrupt sources (flow sensors, actuator pulses, PWM capture)UART RS485 communication @ 115200ADC usage with DMAContinuous vs process-based CPU load classificationWorst-case CPU utilization < 20% (**Please check our attached Doc)RAM usage ~4.4%, Flash usage ~4% (Build Analyzer)Question:From STM best-practice perspective, is this CPU and memory margin considered sufficient for long-term industrial operation?2. Stepper Controller

# External Loader Issue: STM32U5G9ZJT6Q + MX25L12833FZNI-10G (Quad-SPI)## 1. Problem SummaryHello, I'm a novice developer who recently started working with embedded systems. I've been struggling significantly with implementing an external loader for several weeks now...I'm developing an external loader for **MX25L12833F** (16MB Quad-SPI NOR Flash) connected to **STM32U5G9ZJT6Q** via OCTOSPI1, but it continuously fails in STM32CubeProgrammer. The loader compiles successfully and generates a `.stldr` file, but programming operations fail.The problem is sector erase. Writing, reading, verification, and mass erase all function normally, but only sector erase does not work properly. What could be the reason? __attribute__((used)) int SectorErase(uint32_t EraseStartAddress, uint32_t EraseEndAddress) { OSPI_RegularCmdTypeDef sCommand; uint32_t SectorAddr; uint8_t status_before = 0; uint8_t status_after = 0; g_erase_input_start = EraseStartAddress; g_erase_input_end = EraseEndAddre

Hello, ADC_CR_ADCALLIN is described as "rw" . The procedure given in RM0456: 33.4.8 Extended calibration mode does not explicit recommend to reset ADC_CR_ADCALLIN after the procedure. I think it is helpfull to add in RM0456.  

Hello, I have a problem with setting readout protection in the STM32L496 device in software. The protection is set to "BB". After setting and power on reset, the microcontroller seems to not work (it looks like as if it was "stuck up"). I connected the ST-Link programmer and run STM32Cube programmer and it shows option byte RDP set correctly to BB value. Also, in the FAULT ANALYZER section it displays "CPU: LOCKUP". I don't know why it happens and how to solve it. The software code that sets the RDP protection is shown below:  __disable_irq(); while (FLASH->SR & FLASH_SR_BSY); FLASH->KEYR = 0x45670123; FLASH->KEYR = 0xCDEF89AB; FLASH->OPTKEYR = 0x08192A3B; FLASH->OPTKEYR = 0x4C5D6E7F; FLASH->OPTR = 0xFFEFF8BB; FLASH->CR |= FLASH_CR_OPTSTRT; while (FLASH->SR & FLASH_SR_BSY); FLASH->CR |= FLASH_CR_OBL_LAUNCH; 

Can multiple versions of a software be installed on one computer or system? The latest version I recently downloaded doesn't include MX. Should I install version 1.19.0, or use the uninstallation method for version 2.0.0?

My original aim was to prove to myself that I was able to measure execution time with cycle accuracy. In order to do that, I have 9 'test_dwt' functions, they all have same code except number of nop between 2 reads of DWT.That gives unexpected results because M55 has dual-issue capability, as people explained here. Nevertheless, I am puzzled with the result of test_dwt7 (7 nops). All clocks are at 100MHz, interrupts, icache and dcache are disabled, all 'test_dwt' functions starts with isb and dsb instructions.Here I print the result of 5 executions of each function. The execution order is 0 to 7c, repeated 5 times, saving results in an array. Then I print the results:test_dwt0 : 1 1 1 1 1 test_dwt1 : 1 1 1 1 1 test_dwt2 : 1 1 1 1 1 test_dwt3 : 2 2 2 2 2 test_dwt4 : 2 2 2 2 2 test_dwt5 : 3 3 3 3 3 test_dwt6 : 3 3 3 3 3 test_dwt7 : 27 27 27 27 27 test_dwt8 : 5 5 5 5 5 test_dwt7b : 4 4 4 4 4 test_dwt7c : 4 4 4 4 4the code of the 4 last functions:34180824 <test_dwt7&

Hello all,I have been reading other posts with the same problem but I do not get the solution in my case.I'm using the development kit STM32F446RE (Nucleo 64).I have created a new project with STM32CubeMX 6.16.1, and I open the project with STM32CubeIDE 2.0.0. When compiling (in Debug or Release) I get this error: 11:39:26 **** Incremental Build of configuration Debug for project TEST_ST_NUCLEO ****make -j22 all make: stat: ../Core/Startup/startup_stm32f446retx.s: Permission deniedmake: *** No rule to make target '../Core/Startup/startup_stm32f446retx.s', needed by 'Core/Startup/startup_stm32f446retx.o'. Stop."make -j22 all" terminated with exit code 2. Build might be incomplete.11:39:27 Build Failed. 1 errors, 0 warnings. (took 584ms) Any help will be welcome. Thanks in advence.  

I work on a pedometer project, which uses built-in accelerometer and an LCD screen (ILI9341). The screen code works fine, but I struggle to get the pedometer part to work. I suspect there might something wrong with how I initialized the accelerometer, since it outputs weird values.I use an stm32f407g-disc1 board with built-in accelerometer, which I communicate with via SPI. I find the values it returns very weird, since I don't move the device at the moment. Shouldn't they be close to zero since there is no acceleration? Moreover, they don't change when I shake the device slightly, although it may be because the acceleration is not big enough to be detected. Another problem is that mag value changes all the time, although x,y,z don't change.Valuesmain functionint main(void) { /* USER CODE BEGIN 1 */ /* USER CODE END 1 */ /* MCU Configuration--------------------------------------------------------*/ /* Reset of all peripherals, Initializes the Flash interface and the Systick. *

Split from this thread as the questions become more generic on embedded systems not related to the STM32. Hello Team, We are currently evaluating STM32H563ZI for a production system and would like your guidance on recommended CPU and RAM margin before moving to large-scale deployment. Based on our current firmware build analysis (STM32CubeIDE Build Analyzer): RAM: Total: 640 KB Used: ~182 KB (≈28.5%) Free: ~458 KB Flash: Total: 1 MB Used: ~282 KB (≈27.6%) Free: ~742 KB From a static memory usage perspective, sufficient margin is available. However, our application is load-dependent, and real CPU utilization varies based on field conditions and communication traffic. We would like clarification and guidance on the following points: What CPU utilization margin (%) is recommended for STM32H5 series devices in production systems (for example, acceptable average and peak CPU load)? What RAM headroom (free heap and stack margin) is considered safe for long-term and

Hi - does anyone have a solution for this?I have the latest CubeMX with STM32CubeWBA Firmware Package V1.8.0 / 29-October-2025 installed.The attached .ioc file is a minimum configuration for BLE. I am attempting to just get basic BLE advertising working as the first step on a new board.The build (using the auto-generated makefile) fails with "System/Config/LowPower/peripheral_init.c:24:10: fatal error: aes.h: No such file or directory". The AES is turned on in the .ioc file but the header file didn't get generated.  

Hello everyone, I'm having some trouble implementing I3C communication and would like to ask for some help.   I am using the NUCLEO-H503RB board as my main controller. For the target devices, I have the NUCLEO-IKS01A3 expansion board and the TSC1641 (Click Board) connected. I'm currently facing some issues with the I3C communication setup between these components.     I have successfully managed to read the WHO_AM_I ID from the LSM6DSO (on the NUCLEO-IKS01A3). However, when I attempt to read the ID from the TSC1641, the SCL line continues to output a clock signal (or stays toggling) without a proper response. I am seeking assistance in analyzing the root cause of this issue.    

hello,now I am using stm32f030cct6 to design a simple program. i used all the 6 uarts of this chip. it works fine, but the interrupt code generated by STM32CubeMX has a simple bug. the code as below.for the uart6, there is a useless （&huart6);  i think it is no effect to the function, but when building, there is a warning.stm32f0xx_it.c:172:33: warning: statement with no effect [-Wunused-value][build]   172 |   HAL_UART_IRQHandler(&huart6);(&huart6);[build]       |                                ~^~~~~~~~ I dont like the warning. so i think you can simplly fix this bug. thanks.

Hello ST Community,I am working on an OTA firmware update implementation on STM32L496, and I am facing an issue related to dual-bank internal flash usage when the firmware size exceeds 512 KB.I would like to explain my setup and the problem in a simple and clear way. MCU and Flash DetailsMCU: STM32L496Internal Flash: 1 MBFlash configured in dual-bank modeBank1: 512 KBBank2: 512 KB What We Are DoingNormal ApplicationThe main application is stored in internal flashFirmware is built using STM32CubeIDENo OTA activity during normal operationOTA (Current / Tested)OTA is performed using NB-IoT and NFCFirmware is received in chunksChunks are written to flashCRC is verifiedAfter successful verification, firmware is switchedThis OTA flow works only when firmware size is less than 512 KB. Main Issue (Occurs Even Without OTA)When the firmware size increases beyond 512 KB (for example ~600 KB), the system starts misbehaving even if OTA is not started at all.Observed BehaviorUART logs

I want to make a pedometer app that would count steps and display the number of steps on an LCD screen. I have tested my functions for the screen (ILI9341 SPI), and they work successfully. I tested the LCD code by initializing a timer that incremented the value to display every second and sets the flag update_lcd_flag.But when I add the pedometer code, which uses SPI1, the value on the screen never gets updated past zero. Is it because I launch a DMA interrupt from the timer interrupt, or do I need to look for problems somehwere else, e.g. in my pedometer logic or SPI1 configuration? The pedometer relies on the accelometer, which is built into STM32F4O7G-DISC1, which is my board, by defaultP.S. The LCD functions don't use interrupts or DMA, they only use polling.The timer callbackvoid HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef* htim) { if (htim->Instance == TIM2) { if (draw_ready == 1) { HAL_GPIO_WritePin(ACC_GPIO_PORT, ACC_GPIO_PIN, GPIO_PIN_RESET); HAL_SPI_T

I am working with the NUCLEO-WB55RG, trying to get the filter accept list ("white list") feature working. Here is what I'm doing: - The NUCLEO is a peripheral implementing a custom BLE template, generated with STM32CubeMX 6.16.1. The "full" wireless stack V1.24.0 is installed on the M0+ core. - Start advertising with NO_WHITE_LIST_USE, connect, pair, and bond with a Central. This all works. Disconnect, call "aci_gap_add_devices_to_list()" (mode 0x03, also tried 0x05) with my bonded device list (retrieved with "aci_gap_get_bonded_devices()"). I have _also_ tried just called the "aci_gap_configure_whitelist()" command, the result is the same. - Then, if the # of bonded devices is > 0, when advertising restarts I use WHITE_LIST_FOR_ALL as the filter policy. In either case, I can connect and bond with two iOS devices. It seems that the white list isn't actually doing anything, and I can't figure out what to do. I followed the advice here, with no resul

I'm currently using Touchgfx after updating from version 4.25 to 4.26.When I build and run the code generated by Touchgfx 4.26, Display color doesn't match the design in Touchgfx 4.26.But When I do the same thing through Touchgfx 4.25, Display color matched very well. 

I am migrating from STM32L431 to STM32L471. After migration, the function relating to internal flash writing does not work any more. The problem is when I programmed internal flash with HAL_FLASH_Program(FLASH_TYPEPROGRAM_DOUBLEWORD, address, data), following errors occurred, including FLASH_SR_PROGERR, FLASH_FLAG_PGAERR, and FLASH_FLAG_PGSERR.I searched on the web, and found problem may relate to timer initialization and watchdog usage. I added HAL_TIM_Base_DeInit before HAL_TIM_Base_Init, and watchdog is disabled completely in the system including wathdog initialization and update.. But the problem is still there.By the way, the development environment is MDK5.36, ARM::CMSIS IS 5.8.0 (5.6.0 is also tested), ARM::CMSIS-Driver is 2.6.1, Keil::STM32L4xx_DFP is 2.6.1.So, what the problem it might be, and how can I solve this problem?Thanks