STM32 MCUs

Hello, I’m trying to use an X-NUCLEO-IHM03A1 board with a STM32F401RE Nucleo 64 board and a small NEMA 17 motor. My goal is just to learn how to drive steppers with the POWERSTEP01 for various projects and I just can’t make it work. I first tried to port the Ponoor library for arduino to STM32 by adapting and rewriting most of it but it didn’t work. I also tried to look at the ST Library from the X-CUBE-SPN3 software but it doesn’t seem to use the HAL so I haven’t been able to understand much of it. SPI is configured correctly, I’ve watched all the ST videos and read the entire datasheet but somehow I can’t make it work.I checked the entire ST Community forum, I also tried to find code on github or google but I can’t find a single usable piece of code written for STM32. Could anyone who has worked with this component post his C / C++ code. Even a valid SendParamet

Hello,I have designed a custom board with stm32wb55. I used the reference schematic and checked everything but I cannot program the board from my cubeide. I have tried different configuration settings in Cube IDE but always got "No device on target" error. I connecte SWDIO, SWCLK, GND and NRST pin to my stlink. These did not work so I tried different configurations with OpenOCD too but they also failed with these symptomsSymptoms (Multiple attempts with OpenOCD at 100 kHz):SWD-DP responds reliably: chip identified as Cortex-M4 r0p1Examination usually succeeds: shows correct breakpoint and watchpoint countsHalt always fails with "Fail reading CTRL/STAT register" → "Not halted"Roughly 1 in 4 attempts fail to even initialize, but when init succeeds, halt always failsManual NRST-to-GND-then-release tried, same resultAlready reflowed the WB55 once with gel flux, no c

Section 36.6.1, Bit 18 (ITAMP3E) indicates that LSE frequency monitoring can be enabled. It appears that the hardware automatically detects when the LSE frequency goes above or below the defined thresholds and sets the ITAMP3F flag in the TAMP_SR register when an LSE failure occurs. When the LSE fails, ITAMP3 is triggered, which asserts the tamp_erase signal, and the backup registers are then automatically erased?

Hello,I want to generate an arbitrary waveform by a timer using DMA. The waveform is using different pulse widths and also varying periods in multiples of 25µs.By reading AN4776 and HAL documentation I figured out it should be possible with HAL_TIM_DMABurst_MultiWriteStart() function. Unfortunately I don't get an output signal except after reset where a short pulse can be seen. I assume this pulse is due to port configuration during initialization. After that pulse, the signal stays high.My setup (CubeMX):Nucleo32-L432, core clock 80MHzUsed timer is Tim16Prescaler is set to 399 => 80 MHz / 400 = 5µs resolutionARR and CCR preload enabledARR and CCR set to 0 (initialized in source code)DMA enablednormal modememory to peripheralWord / Wordincrement address on memoryinterrupt enabledFor a first run I

Here is the config:mcu stm32h743iit6flash 4 lines 1 bank 32mb W25Q256JVsdram 32mb W9825G6KHhere is the flow 1 read image background from qspi 2 decode image with axi sram at  #define JPEG_WORKSPACE_BASE 0x24040000 // AXI SRAM (fast) #define JPEG_WORKSPACE_SIZE (256 * 1024) // 512KB (up from 256KB)3 copy buffer to external sdram4 dma2d copy and display image .   scenario1 is ok LIBJPEG_DecodeToBuffer((uint32_t)IMG_NEW6, IMG_NEW6_SIZE, (uint32_t*)DECODE_BUFFER1); uint32_t decode_time = HAL_GetTick() - start; printf("✅ JPEG decode: %lu ms\n", decode_time); // Test 3: Display the image start = HAL_GetTick(); //Display_ImageAt_Fast((uint32_t*)DECODE_BUFFER1, 1024, 600, 0, 0);

Hello,I am currently working on a simple USB Power Delivery test project using the STM32G071C8.The system has two USB Type-C ports.I need to detect PDO information and eMarker capabilities in order to determine the appropriate power delivery behavior. However, eMarker detection requires VDM-related functionality, and I could not find any relevant examples or documentation on the official website to continue development.The usbpd_vdm_user files generated by STM32CubeMX are essentially empty, and I could not find any useful reference information in either STM32CubeG0 v1.6.3 or X-CUBE-TCPP.Could you please provide any related example code, application notes, or documentation that demonstrates:VDM handlingDiscover Identity floweMarker cable detectionSOP'/cable communicationAny reference material would be greatly appreciated and would help me continue development.Thank

Hello. STM32H5I'm used to cache operations using memory barriers (ISB/DSB), but looking at a function like HAL_ICACHE_Invalidate() or HAL_DCACHE_Invalidate() I can't find any. Are memory barriers not needed with STM32 ICACHE/DCACHE?

I am using the STM32U575CGU3 MCU in my project, where I transmit data using two CAN frames on the bus. I have configured a CAN transmission cycle time of 250 ms in my software. However, on a few PCB assemblies, I am observing inconsistencies in the transmission cycle time. On few boards, the cycle time appears to fluctuate (e.g., around 0.5–0.6 ms deviation), while on other boards, it works well. Could you please help me understand what might be causing this variation across different PCBAs? Any guidance on potential root causes or debugging approaches would be highly appreciated.

Hello ST Community, I am working with an STM32U585 custom board and I would like to clarify the supported and recommended workflow for flashing TrustZone‑enabled firmware with SBSFU using USB DFU via STM32CubeProgrammer. Hardware / Software Setup MCU: STM32U585 Custom hardware board Tool: STM32CubeProgrammer v2.19.0 Interface tested: ST‑LINK (SWD) USB DFU Security configuration: TrustZone enabled (TZEN = 1) SBSFU (Secure Boot & Secure Firmware Update) used What works (via ST‑LINK / SWD) Using STM32CubeProgrammer CLI with ST‑LINK, I am able to successfully flash all components:

I am having an issue while trying to setup an I2C driver on my STM32F767ZI Nucleo board interfacing with an SHT31 and SGP40 I2C sensors. The code I am running first initializes the SHT31 with a write and read and then initializes the SGP40 with a write and read. The issue I am running into is whenever I send the next message (read on whichever sensor I decide to try to configure first), the I2C peripheral sends a start bit and address as expected but adds a null byte immediately after the address. See attached example where I would expect the address of 0xB2, and the two byte message of 0x36 and 0x82 to be sent instead I see the address of 0xB2, then data of 0x00 and 0x36.  It runs through the first write cycle without an issue.  Edited to elaborate on the logic analyzer captures. I2C_LA._Expected captures the moment after stepping through setting the start bit in the CR2 register. It shows the address being transmitted and then SDA returns h

I am a beginner in electronics. I recently designed a board using the STM32F407VGT6 and DP83848, but after assembly and testing, I encountered a problem.  The board can be programmed and it runs, but the Ethernet section does not work properly.  It does not obtain an IP address.  When I ping any IP address in network range, the Ethernet LED(pin 26) turns on and off, but the Ethernet connection is not actually established. I would appreciate it if you could guide me regarding the schematic and circuit so I can solve this issue.I attach my pcb schematic and board

I am working with the STM32H723ZG and trying to implement Ethernet communication without using an RTOS using LWIP(TCP/IP)  Setup Details: Board: NUCLEO-H723ZG IDE: STM32CubeIDE v1.19.0 Ethernet stack: LwIP PHY interface: RMII Flashing tool: ST-LINK (onboard) Test performed: Ping test from PC Observed behavior: The Ethernet port LEDs (orange and green) remain solid ON after connecting the Ethernet cable. Ping is failing continuously, I got (Destination host unreachable) error. Troubleshoot taken:

Hello ST,We are using STM32H563RGT6 and want to run at 125℃ environment.We see in the datasheet as below.it seems that for STM32H563RGT6 with suffix 6, if we are using LDO bypass mode (using external 1.2V power supply for MCU Vcore), MCU works at VOS1 mode, it also can run at 125℃ environment.Is it right?Thanks.  

Hi,I have a problem with a custom board, where i can not enter bootloader, on some boards...I had a production where around 10% has this issue. (I did not see it on earlier production of 5pcs).The problem is the cube programmer will not enter bootloader mode.I use a autodirection rs485 tranciever (5V on FT pins) and it is working on many of the boards with no problem, also the in-application code works fine for modbus (also on the bootloader broken devices, after programming with ST-Link)I am using a FTDI USB to RS485 converter.The boot pin is held up by a hall sensor and inverter transistor, i have noticed these sensors has different startup time 50-100ms - therefore the MCU reset pin is controlled by a rather slow RC circuit, to ensure boot is high before reset is released. (this is a litle risky).However, i can see on the current consumption when it goes into application mode or assumed bootloader mode, as in bootloader mode the cu

Hello!I am using a 32.768 kHz TCXO (TG-3541CE) as the LSE to count the RTC.The MCU is an STM32L452RE.At room temperature, the RTC operates correctly, but at high temperatures (around 50 °C), the RTC stops.Strangely, once it has stopped, touching the MCU by finger causes the RTC to start running again.Suspecting an issue with the TCXO, I tried a different TCXO, but the same behavior occurred. When I added a 200 Ω damping resistor between the TCXO and the MCU, the RTC no longer stopped even when the temperature was raised to 60 °C.This seems to have solved the problem for now, but I am concerned about whether 200 Ω is an appropriate value and whether this is truly a fundamental solution.If you have any ideas about possible root causes or considerations, I would really appreciate your advice.

Hi,I am working with a custom board using an STM32N657X0H3Q and cannot for the life of me bring about a reset via the NRST pin.I have tried applying the workarounds from errata sheet ES0620 - Rev 3, sections 2.2.19 and 2.2.23, but my device still just hangs when any reset is attempted and needs a power cycle to recover.  In our setup:MCUboot and the application are both built as secure firmwarethe application runs from AXISRAM1 after RAM-loadSince it runs from AXISRAM1 which is where the errata recommends to place the First power-on reset flag, I instead decided to set the CORE_RESET_TYPE bit in the SYSCFG_CM55RSTCR register before each reset (in addition to resetting the clock switch control bitfields to their defaults). Does this type of setup have any implications regarding using the SYSRESETREQ bit to generate a software reset?  

Dear ST Support Team,Thank you for your suggestion to refer to the NX_UDP_Echo_Server example and compare configurations.I have tried to follow your recommendation, but I am still facing issues with Ethernet bring-up. Please find my observations and current status below.1. Current Status (My Application Logs)ETH HAL initialization is successfulPHY link is coming UPHowever, it is negotiating only at 10 Mbps (Full Duplex) instead of 100 MbpsMAC is configured accordingly (10M Full)Transmission is working (ARP packets are being sent successfully)Reception is not working at allKey observations from logs:ARP requests are transmitted:"ETH Tx OK len=42"But:

Hi,I’m working on an STM based UI with multiple dynamic graph widgets on a single screen and running into a hard fault when scaling things up. Right now I have 5 graph widgets, each needing to plot around 700 data points dynamically. However, when I configure all 5 graphs with 700 points each, the screen crashes. The most stable setup I’ve managed so far is about 200 points per graph, anything beyond that consistently leads to a hard fault (which seems memory related).My goal is to reliably support 5 graphs × 700 points on the same screen. I’m trying to understand what could be causing the crash, whether it’s heap or stack limitations, frame buffer constraints, or something else in the graphics pipeline. It would be helpful to know how to narrow this down effectively.

Hello,at the moment i try to read correct accelerometer data with a STM32L010C6 Microcontroller from a accelerometer sensor BMA530. The connection is via I^2C (SDA and SCL) and i programm the Microcontroller with a ST-LINK V2. I took a code from gitHub Platform boschsensortec/BMA530_SensorAPI and changed it because in the common.c data i can´t use the coines commands because the STM32L010C6 needs STM32 HAL-Functions because Bosch use other Hardware as STMicroelectronics. The dev_addr2 = (0x18 << 1) see at https://sourcevu.sysprogs.com/stm32/HAL/symbols/HAL_I2C_Mem_Read#:~:text=SourceVu%20STM32%20Libraries%20and%20Samples,information%20for%20the%20specified%20I2Cand i got it from the BMA530 Datasheet - The default 7

Hi, I have an USBPD sink application created with CubeMX that can be found here:https://github.com/ThiRom/H563NucleoUSBPDSink   The project can be build using cmake. If the project is build using Debug configuration, it works. But using Release it shows timeouts on requests. As you can see below during one millisecond the firmware sends 3 retries and a soft reset.  This problem can be seen with -O2 and -O3 option. It seems that the file usbpd_timersserver.c is not working correctly. I found that function:

Dear ST team.   I am testing UART of NUCLEO-WB09KE with the board [STM32WB09 Nucleo-64 board (MB1801 and MB2032)] I Set UART1 PIN PB4, PB4 with the source attached[100ms period tx send ]. I am checking CN3(23), CN4(35) but no signal shown. Is there anythn

Hello everyone. I read that V8 will become available for OEM in Q1, but is there any estimations when V8 will become available for independent engineers or maybe even NUCLEO V8 will be released?

Hi all, i search properties for manage showed multinumber counters without not cool moving.For example num 123 121 111 . Align not help here .My idea is mark textarea as number aligned and render calculate widths from font for 0-9 and use it to convert showing as monospaced . Ofcourse font editor can change this , but better is switchable choice. Exist or is this doable in an TGFX version?

I'm back, and working with the stm32g070rb chip. I did prototyping on a nucleo board based on the same chip (split the st link and nucleo board), and wired the ST Link to the microcontroller with the following connections I used open-ocd for flashing code to the nucleo, and it worked flawlessly. Based on the wiring, I made the assumption that this'd translate directly when developing the PCB.   (picture of the PCB and the schematic)

Hello,I am currently working with the STM32WBA65RI for BLE Direction Finding using connectionless mode. I would like to know if it is possible to use a low-power mode such as Standby with RTC, allowing the board to consume only a few nanoamps, then wake up periodically via the RTC, perform advertising for a defined period, and return to Standby mode.Could anyone provide guidance or share experience with this approach?Best regards.