Others: STM32 MCUs related

Hi there ! here i'm for another question, are a day i'm go crazy with the SPI interface . I try to comunicate with MC33HB2000EX 10 A H-bridge, SPI programmable brushed DC motor driver. The datasheet write that: So i configure my SPI : and when i send data with  uint16_t spiData=0x2000;uint16_t spiRxData = 0x0000; i reset the CS pin HAL_SPI_TransmitReceive_IT(&hspi1,(uint8_t*)&spiData,(uint8_t*)&spiRxData,1); i wait the callback function and i set the CS pin  no one data come out from MISO and i put on my analaizer and i don't understand why the clock start to logic high and no from logic low i don't know if is the real problem    I hope someone can help me  Thank you  Sergio

Hello Everyone, I’m having trouble understanding how to get the STSW-WMBUS-GUI (GUI for wireless M-Bus stack evaluation of ST Sub-1GHz devices) to work with the STEVAL-FKI868V2 mounted on a NUCLEO-L053R8? https://www.st.com/en/embedded-software/stsw-wmbus-gui.html Does anyone have or know the details to get this to work?Thank you. 

Is there a difference in firmware or other features between two batches (GQ20D 9U CHN2331E) and (GQ24G 9U CHN44811)? The 1st batch number is not booting everytime compared to the 2nd batch number, when pulling Pin26 high.    The fault carries if I swap chips. 

Hello everyone, as part of a project, I would like to control a NEMA 17 or 23 stepper motor via UART. A TMC2209 driver is being used, and the software environment is STM32 CubeIDE. For reasons we cannot explain, we are unable to get the motor running. I am open to any tips that could help us get the motor working. The code can also be provided if needed. Thanks in advance for all feedback :)

Hello everyone,We are experiencing an issue with a product that integrates an STM32H562ZG microcontroller.Our development environment consists of IAR Embedded Workbench 9.70.1, with the project configured using CMake.Currently, we are observing unexpected behavior during debugging. Specifically, after downloading the firmware using IAR and ST-Link V2 and starting the debug session, the application immediately jumps to NMI_Handler().Unfortunately, even after modifying the code, reflashing the microcontroller, and restarting the debug session, the firmware still ends up in NMI_Handler().Performing a full chip erase and reprogramming with IAR resolves the issue,  it becomes inefficient and problematic for debugging because any time the code is modified a full chip erase is needed to make all work.We have seen something related to ECC flash check but we don't know if can be a hint.In our case ICACHE is not activeted (disable by default from CubeMX project). If you needs some other det

I developped my own PCB based on  STM32L051K8U6 MCU and manufactured by JLCBCP. I'm using EasyEDA.At first I used a ST-LINK V2 ( probably a clone)  to flash my card with CubeIDE  and Cube Programmer but I got Error : Unable to get Core ID.So I bought a ST-LINK V3 MINIE and a breakout board and I get the error. 13:50:07 : UR connection mode is defined with the HWrst reset mode13:50:07 : ST-LINK SN : 001F002A414250182035345113:50:07 : ST-LINK FW : V3J16M813:50:07 : Board : STLINK-V3MINIE13:50:07 : Voltage : 3.30V13:50:07 : Error: Unable to get core IDI think, I read all knowledge database from STM website-I manage to use shorter dupont as possible to link breakout board to my board.-Each VDD and VDDA pin has 100 nf découpling capacitors ( and 1 uF capacitor in parallele )-There is a steady 3.3V on each VDD pin - a perfect continuity beetween SW pins (SWDIO and SWCLK) from MCU side and SW pins from ST-LINK V3 MINIE side.- NRST pin is pulled up at 3.3V and linked t

Hello All,We are developing 2 MCU (STM32U5 and STM32N6) based solution which has a Wi-Fi module. There is a need that should allow either STM32U5 or STM32N6 to communicate with ST67W611M1A6BTR Wi-Fi module at any given time. The FW is under our control, and we know that at any given time only one MCU will interact with Wi-Fi module. Do I need to use a multiplexer to decide which MCU to communicate or is it possible with the help of FW. Please suggest what needs to be done on schematic and FW. Regards,Sakshi 

the STM32L431 can trigger per 0.102S by WDI,  but WDO always have a reset signal, why ?   

I have a PCBA design that uses a Molex Picoblade connector instead of RJ45 due to enclosure height restrictions. The PHY IC is a LAN8742A and the MCU is STM32H743VIT6, the ethernet is also POE.I have spliced, a ethernet and 8pin Picoblade connector together to make a 6in cable that plugs into a router. I figured with such a short distance and being 10/100 that while not ideal should still work. I maintained the RJ45 pinout. There is also a POE circuit using a small Silvertel AG9905 module, that is working as expected.Of the 10 boards 3 seem to work but not without some issues. They refuse to work off cold boots (from off to powered) they only seem to work after a warm boot. Also they arent fully stable, sometimes connecting or disconnecting the cable can crash the system or pinging the system can also crash the working boards.For the remaining 7 I am able to assign them a static IP and random MAC, and I can confirm this by seeing the device connected on the router UI, but when I ping

Hi，Recently, I have been evaluating the DAC accuracy of STM32H743. The data sheet mentions the SNR and ENOB , but I have no idea how to test it. Could you please provide a testing method or a testing plan? Looking forward to your reply.

Hi everyone,I’m bringing up USART2 on an STM32 using bare-metal Rust (#![no_std]), direct register access (no HAL, no CubeMX).The CODE looks correctlyHowever, the data itself is wrong.Instead of transmitting 'A' (0x41), the terminal consistently receives values like:0xCE0x05(always stable, but never 0x41).#![no_std]#![no_main]use core::ptr::{read_volatile, write_volatile};use core::panic::PanicInfo;use cortex_m_rt::entry;#[panic_handler]fn panic(_: &PanicInfo) -> ! {loop {}}#[inline(always)]fn r(addr: u32) -> u32 {unsafe { read_volatile(addr as *const u32) }}#[inline(always)]fn w(addr: u32, val: u32) {unsafe { write_volatile(addr as *mut u32, val) }}/* ================= BASE ================= */const RCC: u32 = 0x4402_0C00;const GPIOA: u32 = 0x4202_0000;const USART2: u32 = 0x4000_4400;/* ================= RCC ================= */const RCC_AHB2ENR: u32 = RCC + 0x08C;const RCC_APB1LENR: u32 = RCC + 0x09C;const RCC_CCIPR2: u32 = RCC + 0x0DC;/* ================= GPIO =======

https://community.st.com/t5/others-stm32-mcus-related/ov7670-stm32f429-dcmi-dma-ili9341-spi-lcd-works-no-camera-image/td-p/864331#M9012 I am trying to display a camera image on an LCD using the STM32F429I-DISCO board, an OV7670 camera module, and an ILI9341 display.↑This is a follow-up to my previous post. However, the displayed image is extremely blurred, and it is difficult to recognize what is shown on the screen.What should I check or adjust to display the image clearly?

Good morning,  I need to send data using UART to a board with a specific delay between single elements, which I obtain as I'm using LABVIEW, but on the board said specific delay is not obtained, and worst of all the delay between datas is not constant. I figured there would have been some additional delay, but is there a way to decrease it or at least make it constant? or is it intrinsic to the UART technology?  Thx all

i am try to interface tft lcd via LTDC using FMC, i checked that ram is working fine and test also passed , but i try to resolve lcd issue but it not resoled yes. Can someone help how to do that. i am uploading the complete project which is created. Please help how can i interface with lcd. 

Hello All, I'm working on a board, wherein i am using DRAM 256Mb 200MHz with Mfr. No: part no   APS256XXN-OBR-BG (as recommended in STM32N65 DK) but while going through it i found that this part no is not recommended for the new design. Can anyone please share the alternative of this part no or guide in this.       Best Regards, Sakshi     

Hi everyone,I’m looking for the latest condition-based predictive maintenance kits or devices with the following features:1. Vibration monitoring2. Acoustic sensing3. Temperature monitoring4. Battery Powered, Low Voltage5. Wi-Fi connectivity6. AI-based anomaly detection/failure prediction7. Cloud connectivity. Could you please let me know the latest and best recommended product that meets these requirements? Any details on specs, AI capabilities, and cloud integration would be greatly appreciated.Thanks!Sajid

Hello everyone,I’m looking for any Wi-Fi connectivity implementation examples for the STEVAL-STWINBX1 (STM32U5). Ideally, I’m searching for a solution that integrates with the eLooM framework, or at least a reference on how to properly add Wi-Fi tasks within eLooM.Specifically, I’m trying to find:Wi-Fi driver/task examples compatible with STWINBX1Any eLooM-based implementation of Wi-Fi or network communicationExample projects that connect to AWS IoT using Wi-Fi (HTTP)Documentation or sample code showing recommended methods for enabling Wi-Fi cloud communication on STWINBX1So far, I haven’t found a clear reference project for STWINBX1 + Wi-Fi, especially one supporting cloud connectivity or integrating with the eLooM architecture.If anyone can share links, example projects, or guidance on how to implement this, it would be greatly appreciated.Thank you!Sajid

HelloI am trying to drive a MEMS mirror via I2C communication using the nucleo-h723zg board.This is the clock configuration: Then I activated the I2C1 as follow:  I used the pins PB8 and PB9 for SCL and SDA:I'm using the DAC called MCP47x6A0T, so the address should be:static const uint8_t DAC_Address= 0x60; Then I give an input data:static const uint8_t MEMS_Digital_Input2= 0x1C;and then I use the function Master Transmit in the while loop:HAL_I2C_Master_Transmit(&hi2c1, DAC_Address, MEMS_Digital_Input2, 1, HAL_MAX_DELAY);I've this circuit connected to the microcontroller: Using an oscilloscope and a multimeter I'm always measuring 0V and I can't see the SCL and SDA signals.Do you know where am I doing wrong?Kind regards

 Hi.I'm having an issue with the error: failed to erase memory on STM32F407.I'm using the board https://github.com/mcauser/BLACK_F407VEand the debugger https://github.com/WeActStudio/WeActStudio.MiniDebugger.and the original STM32F407VET6 chip.Yesterday there was no issue, but today when I tried to continue my project, the problem appeared. I have set the SWD frequency from Auto to 100 kHz. At some point, it worked with BT0 = 0 and BT1 = 0 after several attempts of pressing the reset button before starting the debug. I have replaced the debugger twice and tried it on the same chip type on a different board, and it worked. However, it did not work on the chip on my project board. I tried it with the STM32Programmer, and the same problem occurred—it could not erase during download. Strangely, full chip erasure could be done, and the connection was normal with no issues.STMicroelectronics ST-LINK GDB server. Version 7.12.0 Copyright (c) 2025, STMicroelectronics. All rights reserved.

HI allI'd like to know how to be able to read a data file from windows.I have to convert those data (binary) from windows system, to another format, and then write them to a flash W25Q.The only part I'm missing is how to open then read those bin files in windows. I have around 100 of those windows files to work on, and they are on the same windows folder.So what are my options to do that.Thanks all.For now I'm using a Nucleo-L432KC, on STMcube 1.19.0.

Suppose I have a project where I have to  continuously  read and display values from the adc called  AD9215BRUZ, I have NUCLEO-H753ZI  board , is it possible?  Can the STM Hseries  read and sample parellel data , if yes then how should I proceed , if no then what are the limitations.Thank you 

We used a DAC with a sample-and-hold circuit on one of our custom boards. The RC filter was not mounted; instead, the DAC output was directly connected to an SMA connector. We enabled the DAC in the firmware, and after testing, we observed a large amount of current flowing through the STM32 board. Upon inspection, we found a short between the 3.3V rail and ground on the STM32 board. Please find the attachment for your reference.

Hi everyone,I have a question about documenting and sharing testing workflows in embedded or mobile-adjacent projects. When working with STM32 apps or companion Android tools, I’ve seen people mention using an executor for android during UI testing, automation, or demo validation alongside firmware development.Is there any guidance here on how to reference these kinds of external android tools in discussions without running into security, compliance, or moderation concerns? I’m also curious about related issues like how much detail is appropriate, whether links to non-ST tools are acceptable for context, and how others keep posts focused on STM32 development while still explaining their real-world workflows.Would appreciate hearing how the community usually approaches this.

Hi Sir,From the schematics of steval-usbc2dp, the AUX channel is connected to both STM32 MCU and display unit(sink).Does it mean, STM32 MCU can access DPCD information between Host terminal(source) and display unit(sink), or transmit DPCD to display unit instead of Host terminal?Thanks,Eric Fu    

Hi Everyone, I wanted to add a audio codec with stm32U585aii6Q can anyone share he reference or guide how can it be done. Thanks Regards Sakshi