STM32 MCUs Embedded software

Hi,I am experiencing a core freeze issue on STM32H7S3L8 MCU, as described below.UPDATE 1: Most probably Data Cache is the main culprit, closing Data Cache in bootloader solves the problem. Application code Enables Data Cache and we have never observed any freeze errors in application code. Relocating the HASH code changes the behaviour but same error observed for both HW and SW Hash functions so Hash is probably irrelevant! (see the comment section.)In the bootloader, I compute a HASH over the application image stored in external XSPI flash (memory-mapped XIP). After this process, "we believe", the core occasionally freezes and becomes inaccessible through the debug probe.In the first scenario bootloader firmware remains unchanged; only the application binary varies. The freeze depends on the application binary. Some application images consistently trigger the issue on every power cycle, while others run without problems.

I'm trying to ping my NUCLEO-H723ZG board and I've failed with every attempt over many hours; Nucleo board is connected to my MacBook over USB + ethernet cable with an ethernet adapter I'm using STM32CubeMX with VSC extension (this setup works, I am able to program the board and debug it)   My goal: Ping the STM32 over ethernet  Results: Request timeout for icmp_seq 301 ping: sendto: Host is down Or it will hardfault   Code: /* USER CODE BEGIN PV */ extern struct netif gnetif; /* USER CODE END PV */ ... /* Infinite loop */ /* USER CODE BEGIN WHILE */ while (1) { /* USER CODE END WHILE */ /* USER CODE BEGIN 3 */ ethernetif_input(&gnetif); sys_check_timeouts(); } /* USER CODE END 3 */ Config:

Hello.   I have developed a firmware using FREEROTS and FatFS.   I have setted FREERTOS with : - one thread (osPriorityNormal, 24) that perform massive read on uSD file (100MByte) to search a string (the search takes at least 40secs) - a software timer (priority 2) that, in a certain moment, write a string in certain position in another file.   What I observe is that that FatFS f_lseek API called in software timer returns FS_TIMEOUT when the thread is performing massive read.  

Hello,I need the TCP Server with static IP address. I chose the Nx_TCP_Echo_Echo_Server example and NUCLEO-H723ZG board as a starting point. I use the STM32CubeIDE 1.19 with latest x-cube-azrtos-h7-v3-4-0 sample files. So I imported the Nx_TCP_Echo_Echo_Server example project and compiled it without problems. But after that I disabled DHCP and set the static IP address:After that project can't be build and it is necessary to edit app_netxduo.c file as in it still there are some code related to DHCP. But even after successful compilation I can't connect to the server from the client. Also I can't ping it too. 

Hi! I have ran into an issue with the HAL that I have yet to find a decent solution to. This issue has been discussed multiple times in different contexts on the forum, and I though I would write a post to gather some of the discussions/proposed solutionsI have labeled this post with the STM32H5 Series as that’s what I’m working on right now, but I believe this might apply to most/all of the STM32 Series.The issue relates to callbacks in the peripheral drivers of the HAL. Take for example an SPI transaction that I want to initiate on an instance, and where I want the MCU to be notified by an ISR when the transaction is completed. The callback has a type signature of void (* TxRxCpltCallback)(struct __SPI_HandleTypeDef *hspi);in the case of a registered callback or simplyvoid HAL_SPI_TxRxCpltCallback(SPI_HandleTypeDef *hspi);when the callba

Hello everyone,I'm writting today because I have some questions about the memory assignment of the flash on dual core devices such as stm32h745 mcu.I'm trying to assign a direction for the boot program, imagine 20k from "0x08000000". Afterwards I wan to assign 1.5mb for the cm7 and the rest for the cm4.As I understand, by default the flash is separated in 2 banks, first bank for the cm7 and second one for the cm4.I wanted to know if it was possible to use the first bank and half of the second for the cm7, and the rest for the cm4.If so, how I should proceed to achieve that? Because I managed to set the beginning of cm4 on another memory direction by setting the FLASH_BANK2_BASE define, but I don't feel like this is the best approach.Any ideas would be greatly appreciated.Best regards,RPC    

Hello,  I'm Emily and I'm fairly new at using NUCLEO devices and ToF sensor. I would like to ask if a board NUCLEO-F401RE could only run one .bin file or could it run two .bin file? I'm currently trying out STSW-IMG035 but would like to have Gesture and Hand Posture running on one program instead of two.  Also, I would also like two know if it is possible to have gesture and hand posture to run in one program as well. Any help is appreciated!  Thank you!   Emily 

Hi all, I've recently been working on a Nucleo H723ZG with a working implementation that allows for ADC reading over DMA. I've got a Timer event that triggers it at 20kHz and it was reading and processing multiple ADCs. I've shifted to using a custom developed board with a surface mounted STMH733VGT6. I've configured the ADCs and timers to what I believe is the exact same as before. I have verified that there is nothing wrong with the ADC circuitry by initially setting them up using poll for conversion, I was able to get valuable data out of the board doing this.When I went to setup the ADCs to use DMA however I started to have issues, I believe that theHAL_ADC_ConvCpltCallback isn't being called but I am not sure why, I set a break point in there which is never reached. Below I have copied in my TIM1 init function as well as my ADC1 init function in hopes that it may help someone assist me with my issue. 

Hi everyone, I'm using the NUCLEO-H7S3L8 to try to comunicate with a BOS1921 device using the I3C protocol. To get practice i'm trying to read form the Register Map in 6.10 (see the datasheet). Using some example codes from this link  https://www.st.com/resource/en/application_note/an5879-introduction-to-i3c-for-stm32h5-series-mcu-stmicroelectronics.pdf and this https://wiki.st.com/stm32mcu/wiki/Getting_started_with_I3C   . from the example code that i made i try to give the bos1921 a adres, after that i try to read from the Register 0x02 and expect a value of 0x046A in return. but everytime it looks like it's the value from register 0x1E, that is the CHIP_ID. Even trying to read other registers i get the same result.Any idea what I'm doing wrong trying to read? 

Get early access to the next-generation STM32Cube HAL drivers for STM32U5A major update to STM32Cube HAL drivers, called HAL2, is now available for preview on GitHub. It supports the STM32U5 series. Building on over 10 years of experience, HAL2 delivers the following: More optimized drivers with a smaller footprint and improved performance Enhanced portability across STM32 devices to reduce development time A more intuitive API for easier and faster application development To support this update, examples have been revamped for better reusability and understanding, and a new online documentation portal is introduced for enhanced content and easier navigation.Try it now: Explore the preview on GitHub: STM32CubeU5-V2-Pr

Hi. Unfortunately, after several days of struggling with USBX, I'm forced to ask for your help. I'm using custom boards with the STM32h503RB and STM32h563VI. I tested the old library according to forum guides – no response when connected to a PC. The closest I've gotten is following the guide for USBX C0. Windows recognizes the CDC device and assigns a COM port, but there's no response when attempting to open the port.USBX standalone,interrupt enabled, Clock 48MHz, CRS enabled, mempoll size 8*1024, stack size 6*1024https://www.youtube.com/watch?v=43gcc2dGnxQ int main(void) { /* USER CODE BEGIN 1 */ /* USER CODE END 1 */ /* MCU Configuration--------------------------------------------------------*/ /* Reset of all peripherals, Initializes the Flash interface and the S

Edited by a ST moderator to be comliant with the ST community rules. In next time please use </> button to paste your code. Please review How to insert source code. Hi, I have a video application using F767 with LWIP and without RTOS. The custmized board has an SDRAM of 512MB. When receiving data, the pbuf.len is always 1460 bytes while the other side sends 40KB each time. Comparing to the data transfer rate can reach over 20Mbit/s, it's extremely slow in a video application, there must be fundamental issues in buffer configuration in my application. The options in lwipopts.h that I think they would be relevant to the data transfer rate are: #define MEM_ALIGNMENT 4 #define MEM_SIZE (30*1024) #define MEMP_NUM_PBUF 25 #define MEMP_NUM_UDP_PC

Hardware Platform: STM32H750XBH6Software: MDK + CubeMX FW_H7_V1.12.1github: https://github.com/Q-DEBUG/DMAMUX.gitBackground: The timers TIM12/LPTIM1/2/3 used by DMAMUX1/2 to generate synchronization/trigger signals for H7 peripherals are all 16-bit, resulting in low precision. To improve precision and facilitate jitter compensation (testing shows a deviation of approximately 0.3ms–0.5ms per second), I intend to use the internal 32-bit timer peripheral TIM2.The entire chain is divided into two parts:Part 1: DMAMUX1-CH0, using direct mode (without any synchronization signal), maps the TIM2_UP event to HAL_DMAMUX1_SYNC_DMAMUX1_CH0_EVT.Part 2: DMAMUX1-CH1, using synchronization trigger mode , uses HAL_DMAMUX1_SYNC_DMAMUX1_CH0_EVT as t

Hey. I'm trying to use my H7's usb interface and i've currently set it up as a cdc device.What i'm trying to implement though is the following. The stm is supposed to create a virtual connection with either a python app or a tera term terminal.Is there a function or a variable that detects if this kind of a connection is established ? For example, the pico equivalent is tud_cdc_connected() What i want to build is thiswhile(!exampleCOnnectionVariable) { HAL_DELAY(500) }Meaning that my stm would wait during initialization, until a connection is established and then proceed with the super loop.

Hello ST Community,am working with a Nucleo-H753ZI board where the STM32H753ZI is configured as an SPI1 slave, and the SPI master is a TI AM64x R5F core.The goal is for the STM32 to continuously transmit 4-byte frames over SPI (using DMA) whenever the master clocks the bus.However, the problem is:The master is receives only FF FF/* USER CODE BEGIN Header */ /** ****************************************************************************** * @file : main.c * @brief : Main program body ****************************************************************************** * @attention * * Copyright (c) 2025 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 file comes with this software, it is provided AS-IS. * ***************************************************************

Hi,I've implemented a USBX Audio device correctly using ThreadX and the USBX Middleware on an STM32U5 (working as a speaker).I would like now, to implement a microphone using the same USBX Middleware. For that, I would like to figure out if there are some sort of examples where the microphone is implemented (including device descriptors).I'm seeing this old conversation https://community.st.com/t5/stm32-mcus-products/usbx-mic-streaming-on-wba65/m-p/851912#M288041, but no follow-up has been provided.I don't mind an example of any other microcontroller, but I would really love to see it implemented with USBX MiddlewareThanks

Originally a comment on the How to obtain and use the STM32 96-bit UID Knowledge Base article;Moved for better discussionHello,@MCU Support TD  Can I query the following please (correct me if i'm wrong): "If you are not using HAL, then the CMSIS device header provides a definition for the address of the UID. Even without HAL, you have a uniform way to obtain the UID."uint32_t uid[3]; uid[0] = *(uint32_t *)UID_BASE; uid[1] = *(uint32_t *)(UID_BASE + 4); uid[2] = *(uint32_t *)(UID_BASE + 8); I believe this references the 0x04 and 0x08 offset from a reference manual, however this is an offset in bytes, and uid

I’m trying to build a UAC2.0 (USB Audio Class 2.0) device on STM32H7, supporting: High-Speed USB 24-bit audio Playback + Recording Full-duplex, stable, low-latency operation After reviewing many threads here, I still haven’t found a complete or working reference. Previous Threads Don’t Answer the Core Question Here are some related ST Community posts with no clear resolution: Using STM32H7 SAI Slave Mode for USB Audio (UAC2.0) with DSD Format - no reply Getting TinyUSB UAC2.0 Multi-Channel Audio Working on STM32H7S78-DK High-Speed Port&

Hello Everyone, Since the STM32CubeMX .ioc file does not exist for the DAC_GenerateWaveform_TriggerHW example code (as usual), does anyone have suggestions/recommendations on the best way to recreate it? Seems like I need to make iterative guesses in STM32CubeMX and then see if the numbers start matching up in the original DAC_GenerateWaveform_TriggerHW example code? Thanks! C:\ST\STM32Cube_FW_H7_V1.12.1\Projects\NUCLEO-H7A3ZI-Q\Examples_LL\DAC\DAC_GenerateWaveform_TriggerHW\Src\main.c 

Hello!I have an MQTT project using NetX Duo, which publishes MQTT messages to a remote server. But, before it can do that, a secure connection must be established using TLS v1.2, which takes about 18-20 seconds (checked while debugging and stepping through the connect function). So, I wanted to find a way to make that process faster.I found this post on the forums, here (porting Mbed TLS to the STM32H5 platform with hardware crypto acceleration). But this raised some questions for me. Firstly, how to exactly implement this in the NetX Duo's TLS setup (if even possible)? And secondly, I am missing the AES option in the CubeMX settings - is that correct or I am missing something? I only have PKA, HASH, RNG and GTZC options.I checked the included files in the above linked post on how to port the mbedTLS, b

Hello there,as wolfssl_connect is not getting out any ClientHello, I was wondering if it is due to the change of the memory?I am using an example as starting point. Unfortunately it is coming only with the fsbl.ld, so I made changes, so it access the main RAM:/* ****************************************************************************** ** ** @file : STM32N6XX_AXISRAM2_fsbl.ld ** ** @author : GPM Application Team ** ** @brief : Linker script for STM32N6XX Device from STM32N6 series ** 2048 KBytes RAM ** ** Set heap size, stack size and stack location according ** to application requirements. ** ** Set memory bank area and size if external memory is used ** ** Target : STMicroelectronics STM32 ** ** Distribution: The file is distributed as is, without any warranty ** of any kind. ** ****************************************************************************** ** @attention ** ** Copyright (c) 2

Hi,We are using a custom board based on STM32U5G7VJTxQ and implementing USB Mass Storage Class (USBX) to expose an SD card formatted with a file system created using FileX.The SD card when formatted with FAT32 (using FileX API), the USB mass storage device takes a very long time to become available on Windows.Observed behavior:As soon as the USB cable is plugged in, Windows shows a pop-up message:"Please insert a disk into USB drive"After approximately 3-4 minutes, the drive finally appears automatically and becomes accessible.Once the drive is mounted, it works normally.We would like to understand:What could cause this very slow enumeration/access time with FAT32?Are there any known limitations or required configurations in USBX + FileX when using FAT32?Could

Hello,In a typical example, there is the following linker script: /* Highest address of the user mode stack */ _estack = ORIGIN(RAM) + LENGTH(RAM); /* end of "RAM" Ram type memory */ _Min_Heap_Size = 0x200; /* required amount of heap */ _Min_Stack_Size = 0x400; /* required amount of stack */ : : ._user_heap_stack : { . = ALIGN(8); PROVIDE ( end = . ); PROVIDE ( _end = . ); . = . + _Min_Heap_Size; . = . + _Min_Stack_Size; . = ALIGN(8); } >RAM  On paper, the intention is the stack has an allocation of _Min_Stack_Size (0x400) bytes. So far so good.However, the location _Min_Stack_Size seems to have nothing to do with _estack which the is actual address assigned to the MSP by the start-up code.The map file shows that "stack" is located between 0x20000208 and 0x20000608. ._user_heap_stack 0x

Hi, I designed a board with a STM32U535 that connects to a USB host. I wanted to perform my production programming by doing the first flash over USB, without any test jig to pull-up/down any pin. But I've just realized in AN2606, that, from my understanding:- The U535 devices uses Pattern 12 to enter the bootloader- The pattern 12 doesn't have "main flash empty" condition like most other patterns/families.In this pattern 12, I see lots of conditions that I don't really understand (especially the ones with NSBOOTADD0, reference that is not documented anywhere else in this document).Is there a way to enter the bootloader by using only the USB connection, without actively forcing BOOT0 to 1 ? 

Hello,I would like to calculate a CRC-16/IBM-SDLC.I configure the CRC_HandleTypeDef structure as below for HAL_CRC_Init function:h->Init.DefaultPolynomialUse = DEFAULT_POLYNOMIAL_DISABLE;h->Init.DefaultInitValueUse = DEFAULT_INIT_VALUE_DISABLE;h->Init.GeneratingPolynomial = 0x00001021U;h->Init.CRCLength = CRC_POLYLENGTH_16B;