STM32 MCUs Embedded software

Hi, I'm not able to find any DMA available with CAN peripheral in STM32G4. After going deep search I found there's no such native DMA request available for CAN peripherals. So, I want to know is it true that STM32 controllers don't come with DMA with FDCAN/CAN. If available, then kindly share me the reference for making it work. Since, I want to have fast data transfer, and if I use the FDCAN with interrupt based, it will overload my CPU cycles. Thanks in advance.

Hi,I would like to consult the USB HID GetReport feature.The issue is that the printout data from MCU log is different from bus hound displayed result.Bus hound is trial version, the data length indeed is 16.This is the log I set to printout from USBD_HID_Keyboard_SetReport#define UX_DEVICE_CLASS_HID_EVENT_BUFFER_LENGTH 32 static uint8_t g_last_input_report[17]; // adjust size to match your report static UINT g_last_input_report_len = 0; /** * @brief USBD_HID_Keyboard_GetReport * This function is invoked when host is requesting event through * control GET_REPORT request. * hid_instance: Pointer to the hid class instance. * hid_event: Pointer to structure of the hid event. * @retval status */ UINT USBD_HID_Keyboard_GetReport(UX_SLAVE_CLASS_HID *hid_instance, UX_SLAVE_CLASS_HID_EVENT *hid_event) { printf(">>> USBD_HID_Keyboard_GetReport invoked\r\n"); static uint32_t get_report_counter = 0; printf("=== GET_REPORT #%lu at %lu ms ===\r\n", ++get_report_counter, HAL_G

Hello,I would like to use the X-CUBE-CRYPTOLIB to calculate a SHA256 with a key, i'm using STM32CubeIDE 1.18.0 for an STM32u083 microcontroller, STM32CubeExpansion_Crypto_V4.2.0.The issue I have is the first time I call cmox_mac_compute the wrong result is returned. cmox_init_arg_t init_target = {CMOX_INIT_TARGET_AUTO, NULL}; if (cmox_initialize(&init_target) != CMOX_INIT_SUCCESS) { Error_Handler(); } uint8_t tResult[32] = {0}; uint8_t tMessage[63] = {153,234,98,104,200,115,43,208,16,24,124,106,63,66,15,0,0,0,0,0,250,191,113,33,0,0,0,0,0,0,0,53,231,216,222,211,203,112,30,58,145,125,101,150,57,215,149,108,50,229,247,80,239,35,157,119,19,121,218,120,231,50,70}; uint8_t tKey[32] = {173,182,187,187,244,184,224,88,49,224,82,119,184,125,189,202,255,179,154,153,213,5,120,138,162,120,25,250,40,96,170,122}; //Test 1 retval = cmox_mac_compute(CMOX_HMAC_SHA256_ALGO, // Use HMAC SHA256 algorithm tMessage, sizeof(tMessage), // Message to authenticate tKey,sizeof(tKey)

Hi, I am developing firmware for an STM32H747 with Ethernet connected via RMII to a LAN8742 PHY. The project uses lwIP and FreeRTOS. UDP communication works fine when sending data, but when receiving UDP packets, the system crashes after some rundom time, even just when pinging the device. Has anyone encountered a similar issue or can suggest what might cause UDP receive-related crashes in this setup? Thank you

Hi, I recently started a project using the STM32H747BIT MCU and I’m configuring ThreadX v6.4.2 as the RTOS. I followed the usual steps to integrate ThreadX into my system. I decided to use the ThreadX source from the GitHub repository instead of the version provided by CubeMX because ST’s CubeMX package does not include the latest ThreadX updates. During the project configuration, I ran into some issues. I added the tx_api.h, tx_port.h, and libthreadx.a files to the M7 core’s makefile. However, I noticed that the _tx_initialize_low_level.S file is missing. Although the repository provides an example of _tx_initialize_low_level.S, it is not tailored for my MCU. Therefore, I copied the _tx_initialize_low_level.Sfile generated by CubeMX for an older version of ThreadX. After including all these files, when I compile and try to call the functions _tx_initialize_kernel_setup and _tx_initialize_kernel_enter, I get the following error:threadx/common/src/tx_initialize_kernel_ent

I am using the STM32H523 microcontroller with I3C function and a system clock of 250MHz. I am configuring LL-I3C_SetPeriodClockHighI3C (I3C1,0x0D) based on the LL library;LL_I3C_SetPeriodClockLowPP(I3C1,0x0D);LL_I3C_SetPeriodClockLowOD(I3C1,0x0D);At this time, the clock is about 8.9MHz, and the oscilloscope waveform is outputting normally, but when configured asLL_I3C_SetPeriodClockHighI3C(I3C1,0x09);LL_I3C_SetPeriodClockLowPP(I3C1,0x09);LL_I3C_SetPeriodClockLowOD(I3C1,0x09);At this time, the clock is about 12.5MHz. The oscilloscope sees that before sending the normal waveform, the microcontroller will send a byte of 0x3F, which is not what I want. I want to know where the problem lies.

Hello Microsoft Community,I’m currently working on implementing a file system using FileX and LevelX on external NOR Flash (IS25LP064D) connected to the STM32U585AII6Q board.Flash Memory Specifications:Sector Size: 4 KBBlock Size: 32 KB / 64 KBTotal Flash Size: 64 Mbit / 8 MBPage Size: 256 bytesRequirement:I need to create a .txt log file using FileX and once the file reaches 100 KB, it should be deleted and a new file created in its place.Media Initialization Parameters Used:Total clusters: 300Bytes per sector: 512Sectors per cluster: 8Hidden sectors: 0Heads and sectors per track: 1Number of FATs: 1Issue:When writing logs using FileX, I receive a FX_IO_ERROR after a few logs are written—even though there is still available space on the flash.My Questions:  What are the correct parameters to pass to fx_media_format() for this NOR flash setup (e.g., sector size, cluster size, number of FATs)?Is there a formula or guideline for determining these parameters when using NOR flash

 Platform: STM32 Nucleo-H7A3ZI-QGoal: Read audio from four microphones in stereo mode (two mics per I²S interface) via DMA, then enqueue complete stereo frames for processing.1. Hardware & DMA SetupI2S1 handles Mic 1 (left) and Mic 2 (right).I2S2 handles Mic 3 (left) and Mic 4 (right).Each I2S interface uses DMA to fill its receive buffer (data_i2s[] and data_i2s_2[]).2. Current Callback Codevoid HAL_I2S_RxCpltCallback(I2S_HandleTypeDef *hi2s){ if(hi2s==&hi2s1){ if(x1Flag == 0){ valX1 = 0; valX1 = sample_left = ((int32_t)data_i2s[0]) >> 8; x1Flag = 1; }else if(x2Flag == 0){ valX2 = 0; valX2 = sample_right = ((int32_t)data_i2s[1]) >> 8; x2Flag = 1; /*if(x1Flag != 0 && x2Flag != 0){ enqueueData(); }*/ } }else if (hi2s == &hi2s2){ if(y1Flag == 0){ valY1 = 0; valY1 = sample_left_2 = ((int32_t)data_i2s_2[0]) >> 8; y1Flag = 1; }else if (y2Flag == 0){ valY2 = 0; valY2 = sample_right_2 = ((int32_

I'm able to generate a simple PWM signal but I wasn't able to generate arbitrary waveform with DMA (HAL_TIM_DMABurst_MultiWriteStart).How should be configured the DMA ?Is there an example that use PWM with DMA on STM32U5 ?

Question:I’m using an STM32H7A3ZI-Q with four INMP441 MEMS microphones. Each INMP441 outputs PCM (not PDM), and all four share the same BCLK (bit clock) and LRCLK/WS (word select). I’ve split the data lines into two stereo pairs:SAI_A (master) → Microphones 1 & 2SAI_B (synchronous slave) → Microphones 3 & 4Both SAI blocks run in I²S/PCM mode, each with its own DMA stream.Only one stereo pair connected → perfectly clean audioAll four microphones connected → one stereo pair becomes very noisy and distorted  hsai_BlockA1.Instance = SAI1_Block_A; hsai_BlockA1.Init.AudioMode = SAI_MODEMASTER_RX; hsai_BlockA1.Init.Synchro = SAI_ASYNCHRONOUS; hsai_BlockA1.Init.OutputDrive = SAI_OUTPUTDRIVE_ENABLE; hsai_BlockA1.Init.NoDivider = SAI_MASTERDIVIDER_ENABLE; hsai_BlockA1.Init.FIFOThreshold = SAI_FIFOTHRESHOLD_3QF; hsai_BlockA1.Init.AudioFrequency = SAI_AUDIO_FREQUENCY_16K; hsai_BlockA1.Init.SynchroExt = SAI_SYNCEXT_DISABLE; hsai_BlockA1.Init.MonoStereoMode = SAI_STEREOMODE; hs

Hello community,I have been working towards getting a prototype ThreadX modules project on my board (Nucleo U545RE-Q) using CMake from a generated STM32CubeMX project. I have been loosely following the documentation https://github.com/eclipse-threadx/rtos-docs/blob/main/rtos-docs/threadx-modules/I have been able to build a ThreadX Module as a library, and a ThreadX Module Manager as a library - CMake samples below:# Interface library for includes and symbols add_library(module_1 INTERFACE) target_include_directories(module_1 INTERFACE ${MX_Include_Dirs}) target_compile_definitions(module_1 INTERFACE ${MX_Defines_Syms}) # Create STM32_Drivers static library target_link_libraries(STM32_Drivers PUBLIC module_1) # Create ThreadX static library add_library(ThreadXModules OBJECT) target_sources(ThreadXModules PRIVATE ${Module_sources}) target_link_libraries(ThreadXModules PUBLIC module_1)# Interface library for includes and symbols add_library(module_manager INTERFACE) target_i

Hi everyone,I am trying to send the firmware to the MCU via webpage. I want to send chunks of the file (4096 bytes) to the mcu, so it can store in ram, do some checks and then store it in an external memory. The firmware size can be maximum of 1.7MB (all the web pages and content are embedded in the firmware). The webserver is running, and I have the request notify callback function#define fwBufferSize 5000 CHAR fwBuffer[fwBufferSize]; UINT webserver_request_notify_callback(NX_WEB_HTTP_SERVER *server_ptr, UINT request_type, CHAR *resource, NX_PACKET *packet_ptr) { CHAR temp_string[30] = {'\0'}; CHAR data[512] = {'\0'}; UINT string_length; NX_PACKET *resp_packet_ptr; NX_PACKET *currentPacket; UINT status; ULONG total_bytes_sent; ULONG total_bytes_received; ULONG connections; ULONG disconnections; ULONG length; ULONG aOffset, aLength; UINT actualSize; ULONG bytes_read; ULONG packetLength; CHAR *destination_ptr; UINT destination_size; UINT *actual_size; CHAR *serv

Board: NUCLEO-144 STM32H723ZGI'm using ADC_3 with 8-bit resolution, trying to measure an analog sine wave of 1 kHz as a stimulus.I'm trying to use the ADC with DMA. However, I am unable to get any values other than zero. I have tested it in polling mode and have successfully gotten correct values. I have been looking at multiple code examples. It seems like HAL_ADC_START_DMA should be enough to start sampling; however, my buffer isn't being updated. Where have I gone wrong? DMA settingsADC DMA settingsADC_settings ADC_regular_conversionMode CODE:/* 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

Hello ST Community,I recently purchased the STM32N6570-DK development board. However, I accidentally erased the default factory firmware by programming it with my own application, without saving the original files.As a result, I am no longer able to access the default UI features such as Edge AI live video, and other demos that originally came with the board.If anyone has a copy of the original default firmware (.hex or .bin files) that comes preloaded with the  STM32N6570-DK, I would greatly appreciate it if you could share it with me.Thank you in advance for your support.

Hello,I am looking for the MCU for my project. I need the Ethernet and Can bus, so STM32F429 was in my mind first, but as I don't need the display function, I tried to find more affordable option.But I couldn't find the right one in STM32F4 series, and instead, I found STM32H5 series (STM32H563). When I did some research, STM32H563 doesn't seem to work with FreeRTOS or some special configuration to add the FreeRTOS. But I want to use RTOS as I need the firmware update via Ethernet.My question is1. Is the firmware update via Ethernet for STM32H563 with FreeRTOS available? 2. If not, is it better to use Zephyr OS even though STM32CubeIDD doesn't support Zephyr OS directly?I want to get the opinions before I order the dev kit.

Hi to everybody.I can't get spi to work with linked lists. I followed the procedures in the documentation but it still doesn't work. Maybe someone can tell me why.This is my configuration: STM32U575, cubeMX 6.12.0, cubeIDE 1.9.0The linked list has two nodes. The first one writes 4 bytes on SPI2 and the second one reads 4 bytes on SPI2.I don't see the clock strokes on the SPI2 bus.Thanks a lot in advance.main.cint main(void) { /* USER CODE BEGIN 1 */ /* USER CODE END 1 */ /* MCU Configuration--------------------------------------------------------*/ /* Reset of all peripherals, Initializes the Flash interface and the Systick. */ HAL_Init(); /* USER CODE BEGIN Init */ /* USER CODE END Init */ /* Configure the system clock */ SystemClock_Config(); /* Configure the System Power */ SystemPower_Config(); /* USER CODE BEGIN SysInit */ /* USER CODE END SysInit */ /* Initialize all configured peripherals */ MX_GPIO_Init(); MX_GPDMA1_Init(); MX_ADC1_Init(); MX_DAC1_I

Hey everyone,I’m working on a USB audio project using TinyUSB on my STM32H7S78-DK Discovery board, and I’ve hit a wall with UAC2.0 on the High-Speed port. I’m hoping someone here has experience with this setup and can point me in the right direction!What I’ve Achieved So FarBoard: STM32H7S78-DK (three USB-C ports)ProgrammerFull-Speed (USB FS)High-Speed (USB HS)TinyUSB ported successfully to the boardCDC example works perfectly on the Full-Speed portAttempted UAC2.0 on Full-Speed port, but Windows rejects itWindows insists on at least a High-Speed device for USB Audio Class 2.0What I’m Trying to DoI want to stream multi-channel audio (UAC2.0) over the High-Speed USB-C port. Unfortunately, I can’t get TinyUSB’s UAC2.0 example to enumerate or work on HS. The descriptors seem correct, but Windows doesn’t recognize the device as a valid UAC2.0 HS audio interface.What I’ve CheckedClock configuration – HS PHY clock is enabled, and I’ve verified 480 MHz operation.Pin mapping – USB1 HS D+/D– pi

hi i am working with HTTPS client code on stm32u585 microcontroller, using netx tcp/ip stack for the implementation. my requirement is to create a HTTPS post request with a json payload( nearly 8000 bytes). is there any reference or example available on HTTPS post request using netx. all i can see is the get request in the official GitHub.if any example or reference regarding this issue will be much helpful for implementation. with regards sabarinath 

Hello all, I am developing ptp master and slave with offload. Now I have a master sending the sync and a slave sending delay_req: with the master sending back delay_resp: Given this message exchange, the slave should be able to correct its time, but, to do this, it needs some timestamp. Referring to figure 788: How can I (the slave) get t1,..,t4? Thank you P.S. Every delay_req has :originTimestamp (seconds): 0so it seems that hw does not correct the timestamp

Hello @Amel NASRI ,I am using nucleo-f767ZI board. I have custom LCD board which use NV3041A QSPI interface.I am trying to read manufacture ID from NV3041A on QSPI interface.My code is as belowstatic void MX_QUADSPI_Init(void) { /* USER CODE BEGIN QUADSPI_Init 0 */ /* USER CODE END QUADSPI_Init 0 */ /* USER CODE BEGIN QUADSPI_Init 1 */ /* USER CODE END QUADSPI_Init 1 */ /* QUADSPI parameter configuration*/ hqspi.Instance = QUADSPI; hqspi.Init.ClockPrescaler = 4; hqspi.Init.FifoThreshold = 1; hqspi.Init.SampleShifting = QSPI_SAMPLE_SHIFTING_NONE; hqspi.Init.FlashSize = 1; hqspi.Init.ChipSelectHighTime = QSPI_CS_HIGH_TIME_1_CYCLE; hqspi.Init.ClockMode = QSPI_CLOCK_MODE_0; hqspi.Init.FlashID = QSPI_FLASH_ID_1; hqspi.Init.DualFlash = QSPI_DUALFLASH_DISABLE; if (HAL_QSPI_Init(&hqspi) != HAL_OK) { Error_Handler(); } /* USER CODE BEGIN QUADSPI_Init 2 */ /* USER CODE END QUADSPI_Init 2 */ } void NV3041A_ReadData(uint8_t command, uint32_t addre

Hello ST Team,I am currently working with the STM32U5 Discovery board (B-U585I-IOT02A) to connect to Azure IoT Central, and I’ve tried two different approaches. I'm facing two distinct issues in each method, as described below:1. YouTube Method – TrustZone IssueReference: https://www.youtube.com/watch?v=BZn2PCvgL9sThe video references a specific GitHub repository for the Azure connection demo, but the repo is currently unavailable .I proceeded using the latest available X-CUBE-AZURE package from the official ST GitHub.When I run the project on my B-U585I-IOT02A board, I get the following runtime error: STM32U5_TrustZone_DisableThis seems to be a TrustZone configuration mismatch between the project and the board2. ST Community Tutorial – DNS and SPI ErrorsReference: https://community.st.com/t5/stm32-mcus/how-to-quick-connect-stm32u5-to-azure-iot-central/ta-p/49685I followed the ST community Quick Connect guide.Wi-Fi connects successfully to my access point.However, the board fails to re

I wanna implement Master and Slave ethercat protocol on stm32h7 series. Is there any examples available on subject?. Where should i start. Any resources?

Dear STMicroelectronics Support Team, I am encountering an issue with ADC calibration on the STM32N657 microcontroller. Despite multiple attempts, the calibration process consistently fails. Below are the details of my setup and observations for your reference: Hardware Configuration: ADC: ADC1, Channel 1 Reference Voltage: VREF+: External 1.8V (measured 1.76V) VREF-: Ground Other: Enabled ICache/DCache, GPIO, USART1, and system isolation. Software Configuration: Initialization Code:   SCB_EnableICache(); SCB_EnableDCache(); HAL_Init(); MX_GPIO_Init(); MX_ADC1_Init(); MX_USART1_UART_Init(); SystemIsolation_Config(); // Debug: Check registers post-init printf("Post-Init ADC_CR: 0x%08lX\r\n", hadc1.Instance->CR); // Output: 0x00000000 printf("Post-Init ADC_ISR: 0x%08lX\r\n", hadc1.Instance->ISR); // Output: 0x00000000 // Explicit MSP init (debug) HAL_ADC_MspInit(&hadc1); printf("Post-MSP ADC_CR: 0x%08lX\r\n", hadc1.Instance->CR)

Hello everyone,I am currently working with the STM32N6570-DK board and the MB1854B ST camera module.For testing purposes, I have compiled and run the following example from ST's GitHub repository:https://github.com/STMicroelectronics/STM32CubeN6/tree/main/Projects/STM32N6570-DK/Applications/DCMIPP/DCMIPP_ContinuousMode .In this example, the camera operates at a resolution of 2592x1944.Now, I would like to change the camera configuration to capture video at a lower resolution, such as 640x480 or 384x288.Could someone please guide me on:How to configure the camera for 640x480 or 384x288 resolution?Are there specific register changes needed for the IMX335 sensor?I have checked the IMX335 datasheet, but I couldn’t find register-level details—where can I find the correct registers or configuration sequence?Any help or code snippet showing how to set a different resolution would be greatly appreciated.Thank you. 

STM32H743ZIT6 LwIP - Ping Working in Example but Fails in My Own Project - Need Step-by-Step Help]Hi everyone,I am working with STM32H743ZIT6 and trying to implement basic Ethernet communication using LwIP. I downloaded the STM32CubeH7 package, and using the default LwIP example, I can successfully ping my STM32 board from my PC — no issues there.However, when I try to replicate the same configuration in my own project, I cannot get ping to work. I suspect I am missing some configuration step or detail, even though I tried to match everything. Details:1. MCU: STM32H743ZIT62. Development Environment: STM32CubeIDE3.LwIP Version: Provided with latest STM32CubeH7 package4. PHY: LAN87425.Clock Configuration: HSE 25 MHz, proper PLL setup6.LwIP Example: LwIP_Ethernet example — works fine, I can ping7.My Own Project: Same clock setup, same LwIP stack, but ping doesn't work