STM32 MCUs

Hello,I'm currently working on a project using the STM32U5A5VJT6 processor, and I'm exploring the feasibility of implementing WireGuard in a bare-metal environment. I found one mention of WireGuard in this community post [link], however afaik it is an application for an OS based ST product. So I'm looking for more detailed insights.Is STM actively working on any initiatives to bring WireGuard support to processors like the STM32U5A5VJT6, especially for bare-metal implementations?The WireGuard protocol was primarily designed for OS-based systems with kernel support, which makes bare-metal implementation exceptionally challenging. Given the cryptographic and networking demands, has anyone made significant progress or come across alternative approaches that could support WireGuard (or similar VPN functionality) on an STM32?I encountered Mongoose’s library for networking on STM32, which offers some guidance on web server setups. Are there other resources or community-driven efforts that ad

Hello,I was playing around with different versions of MCU and I've notice STM32H7B3LIH has no Graphic Accelerator mentioned in Product Selector.But as soon as I'm selecting it in CubeMX I can enable DMA2D in Multimedia.And think there are more MCUs with Chrome-ART Graphic Accelerator which are not correctly shown in Product Selector.

I am using the STM32N6570-DK and I want to use the external PSRAM to declare a large variable buffer. Here is what I have done: 1. Initialized XSPI1 and the External Memory Manager. The PSRAM parameters I got from How to execute code from the external PSRAM using the STM32N6 . 2. Set the XSPI1 clock to 200MHz. Here is my system clock configuration:    Here is my main code from the FSBL. I also added a `gpio_toggle` to turn the user LED on before `MX_EXTMEM_MANAGER_Init()` as a debug indicator.After adding the header and programming, the FSBL boots correctly — the user LED turns on — but then it gets stuck at `MX_EXTMEM_MANAGER_Init()` and never jumps into the `while` loop.int main(void) { /* USER CODE BEGIN 1 */ /* USER CODE END 1 */ /* MPU Configuration--------------------------------------------------------*/ MPU_Config(); /* Enable the CPU Cache */ /* Enable I-Cache---------------------------------------------------------*/ SCB_EnableIC

Hello ST Community,I am working on a commercial vending machine controller and would like to get feedback from ST engineers and experienced STM32 designers regarding a system architecture change.Problem StatementOur current system uses a single MCU, but we are now hitting hard peripheral limits, mainly:Timer availability (stepper + DC motor control)GPIO interrupt countGPIO pin availabilityIncreasing real-time jitter when multiple loads are activeThis is not a software optimization issue anymore; it is a resource saturation issue.Because of this, we are planning to move from a single-MCU architecture to a multi-MCU system.Proposed ArchitectureMaster MCU: STM32H563ZIT6Handles:All sensors (ADC / digital)Control logic & state machineRecipe executionSafety checksUI communicationNo direct motor timing generationSlave MCUs (2x):Dedicated load-handling controllersOne for stepper motorsOne for DC motors / PWM-based loadsSlaves perform only deterministic actuationNo sensors, no business logi

Hi I'm new to the STM32 board but not to Arduino IDE. I want to use two STM32 boards (with DXV lr30 900) for LoRa communication. I'm starting with a minimal program (without LoRa), just to see how the communication works between the STM32 and the Arduino IDE's serial interface. I can compile and download this program without any problems, but I don't see anything on the serial interface, whether using the ttyUSB0, ttyUSB1, or ttyS0 ports at 9600 baud.   here is the test program   void setup() { Serial.begin(9600); delay(2000); Serial.print("hello"); } void loop() { Serial.print("."); delay(1000); }   Can anyone help me ? Thanks in advance

Hi,I am trying to get any communication with the source through VDM messages on my STM32G071RB + SNK1M1 setup and I am not able to. The source sends a request "VENDOR_DEFINED VDM:SVDM_DISCOVER_IDENTITY INIT" but PE on the sink responds with PE_SEND_NOTSUPPORTED. Power delivery works fine and manages to negotiate different power options.The code is generated with CubeMX following this step-by-step guide: https://wiki.st.com/stm32mcu/wiki/STM32StepByStep:Getting_started_with_USB-Power_Delivery_Sink I followed the manual (https://www.st.com/resource/en/user_manual/dm00598101-managing-usb-power-delivery-systems-with-stm32-microcontrollers-stmicroelectronics.pdf) chapter 4.5 and enabled these VDM features.To implement the VDM callbacks and some DPM callbacks I used this repo: https://github.com/STMicroelectronics/STM32CubeG0/blob/master/Projects/STM32G0C1E-EV/Demonstrations/Modules/ucpd/I am aware that there isn't sufficient hardware support for alternate modes on my current hardware but sh

I want to make a speedometer with a STM32 MCU. What is the best solution. Do stm32 have any products wich works as a plug and play speedometer.

Hello Engineers,I have recently started developing a product based on the STM32F446RET6 MCU integrated with the RFM95W (SX1276) LoRa module. My goal is to transmit sensor data to a LoRaWAN network server such as TTN or ChirpStack.I am using STM32CubeIDE for firmware development. However, I have not been able to find clear documentation or structured examples explaining how to implement LoRaWAN (end-device) communication using this MCU and radio combination.What I am Looking For:A stable and recommended LoRaWAN library compatible with STM32CubeIDEGuidance on integrating the SX1276 (RFM95W) with STM32 HAL driversA basic bare-minimum example that sends dummy payload data to a LoRaWAN server (preferably OTAA)Any reference projects, repositories, or step-by-step guidanceTarget Setup:MCU: STM32F446RET6Radio: RFM95W (SX1276)IDE: STM32CubeIDELoRaWAN Server: TTN / ChirpStackRegion: (EU868 / IN865 — depending on deployment)Even a minimal working example that performs:Radio initializationLoRaWAN

Hi,I’m experiencing issues configuring a display using a custom PCB with the STM32H747BIT MCU and LVGL for the UI. Currently, the project runs a minimal setup with only one loop calling lv_timer_handler();. At this point, my main goal is to get the screen working correctly.I’m using LVGL in direct mode for the display buffers.The issue I’m facing is that the screen occasionally shows horizontal glitches. I’ve created a simple spinner using the following code: /* Create a spinner */ lv_obj_t * spinner = lv_spinner_create(lv_screen_active()); lv_obj_set_size(spinner, 64, 64); lv_obj_align(spinner, LV_ALIGN_BOTTOM_MID, 0, 0);You can see the glitch in the attached video.As you can see, the glitching is more noticeable in Video_1 than in Video_2. These are the display timing configurations used for each:Video_1:Video_2: Please note that the configuration in Video_1 follows the manufacturer’s recommended settings. In Video_2, I performed some tests and observed that increasing either

Hi, Does anyone know the default voltage level of an LPUART output as I am trying to interface with a device with a UART logic level of 1.8V so might need a level converter? Couldn't see anything about LPUART voltage on the datasheet? 

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Hi all,I’m using STM32H755 on a Nucleo board with FreeRTOS, the socket-API and CubeMX-generated LWIP. Sending a UDP packet immediately after network init works fine, but if I wait ~10 seconds before calling sendto(), it returns successfully, DMA descriptors OWN=0, ETH IRQs are triggered, yet no packet reaches the wire. Calling sys_check_timeouts() before sendto() does not help. The tcpip_thread has high priority, while the sender task runs at IDLE priority. In my tests, I disabled the Cache.It seems the issue is not PHY or DMA. It seems that sendto() copies data to the LWIP buffer, but the tcpip_thread does not process it after a long idle. How can UDP packets be reliably sent after idle without changing the network stack or manually triggering anything?Thanks for any insights!

I'm encountering a persistent issue when setting up an STM32Cube project in VS Code. Even when reverting to a previously working commit or starting a fresh setup from scratch (using the "Setup as an STM32Cube project" button), the process fails.The following error message appears:"Cube project discovery CMake configure step failed. Setup might be incomplete. Please check output logs"I have tested this on two different machines running both Linux and Windows, but the result is the same. Here are the relevant logs: 2026-02-20 08:41:11.309 [Info] Adding cube-cmake path to environment: /home/user/.vscode/extensions/stmicroelectronics.stm32cube-ide-build-cmake-1.43.0/resources/cube-cmake/linux2026-02-20 08:41:19.016 [Info] Running STM32Cube commands 'cube pack sync + cube pack install STMicroelectronics.stm32f4xx_dfp.1.1.0'2026-02-20 08:41:19.665 [Error] /home/user/Downloads/project needs to be configured first2026-02-20 08:41:22.979 [Info] Activating STM32Cube configurations for the c

Generating code for the STM32WLE5CBU.In timer_if.c:extern RTC_HandleTypeDef h;but in rtc.c:RTC_HandleTypeDef hrtc; It happened in CubeMx 6.16.1 and STM32Cube_FW_WL_V1.4.0 and is still happening using CubeMX6.17.0 and STM32Cube_FW_WL_V1.5.0

I have a problem with disabling gfxmmu. I don't have a rounded display so that actually I do not need GFXMMU.I created a project by using Touchgfx Designer Templates (STM32H7S78 DK BPP). GFXMMU is activated in default. I would like to disable it. So, I disable it in cubemx then exclude instrumantation files. Then I updated TouchgfxHal.cpp and frame buffer adresses as 0x9000 0000 - 0x9020 0000.Then I could succesfully build the project. When I run it, it is working particularly but the frame/image is broken down. I am adding the image here!Could you explain me how to enable or disable gfxmmu properly from project?

Hello, I read somewhere that I can use the ST-LINK built into my H563ZI to program my custom cards with STM32F401.Could someone help me figure out how to do this?Thanks in advance.

Hi,I have setup three channels in Timer_2 on an 32F429 MCU and have come across a seemingly inconsistent behaviour with regards to the alternate functions mentioned on the datasheet.More specifically, I have setup pins PA0, PA1, PA2 for Output_Compare, Input_Capture and PWM against channels 1, 2 and 3 of Timer_2 respectively and although the behaviour I observe on pins PA0 and PA1 is the expected one (well nearly the expected one but will ask a new question a bit later as that's probably a separate issue), pin PA2 is entirely dead as I don't get any pulsation happening whatsoever.I checked my configuration again and again in order to make sure it's setup correctly and verified the alternate functions I've setup for the gpio pins match the datasheet but that all looked fine:I then scrolled a bit further down on the datasheet and noticed that there's an alternative alternate-function pin for Timer_2 channel 3, namely PB10:So, I tried configuring that for the PWM pin and voila, it al

I used to work with Nucleo board STM32G474 and programm them. Recently I can not open the file to programm my devices. I looks a window problem.I installed again all the ST Tools but the problem remain.I can not open files.

Hi, I'm following the "Programming guidelines for IEEE 1588 timestamping" from page 2792 of the RM0481. I've been working on this specifically for quite a while and I cannot even get the timestamp nanosecond or second registers to move. It feels to me like a clock issue, but unless I'm mistaken, the PTP clock (clk_ptp_ref_i from the manual(p.456)) is the same as the ETH clock (PLL1Q), which I've verified is running because I'm successfully using NetXDuo to negotiate DHCP and send/receive UDP packets successfully. I've also tried initializing the PTP Timestamp without NetXDuo just in case there was some conflict there, but that was also unsuccessful.  Here is my initialization code: /*1. Mask the Timestamp Trigger interrupt by clearing bit 12 of Interrupt enable register(ETH_MACIER).*/ ETH->MACIER &= ~(ETH_MACIER_TSIE); PRINT_U32_BINARY(ETH->MACIER); // 2. Set bit 0 of Timestamp control Register (ETH_MACTSCR) to enable // timestamping. ETH->MACTSCR |= ETH_MACT

Hello everyone, I'm facing a very frustrating issue with USART2 on my Nucleo-L475VGT6 board using the built-in ST-LINK Virtual COM Port. What works: - ST-LINK is detected (COM3 appears, Windows sound plays on connect) - Code downloads successfully (no error in CubeIDE console) - LED blinks (proof that main() is reached and while(1) is running) - HAL_UART_Transmit is called  What does NOT work: - Nothing appears in any terminal: MobaXterm, PuTTY,  PowerShell serial reader - No garbage, no partial characters, just black screen - Same behavior in Run mode (no breakpoint) and after physical Reset button MY code: /* USER CODE BEGIN 0 */ uint8_t tx_buff[]={0,1,2,3,4,5,6,7,8,9}; /* USER CODE END 0 */ while (1) { /* USER CODE END WHILE */ /* USER CODE BEGIN 3 */ HAL_UART_Transmit(&huart2, tx_buff, 10, 1000); HAL_Delay(10000); } What am I missing? Is there a jumper / solder bridge I forgot on Nucleo-L475VGT6 for VCP? Or is there a known bug with USART2 VCP on L4 series? Tha

/* * ledfunc.c * * Created on: Jan 16, 2026 * Author: roman */ #include "main.h" #include <string.h> #include <stdio.h> #include "ledfunc.h" uint8_t flag = 0; uint8_t blue_but_click_number = 0; char pressedKey='\0'; char readChar='\0'; //UART_HandleTypeDef huart2; void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin) { flag = !flag; char main_str[50] = "Button clicked: "; char num_str[45]; // Buffer to hold the string representation of the integer // Convert the integer to a string snprintf(num_str, sizeof(num_str), "%d times\r\n", ++blue_but_click_number); // Concatenate the new string to the main string // You must ensure main_str has enough allocated space for both parts strncat(main_str, num_str, sizeof(main_str) - strlen(main_str) - 1); HAL_UART_Transmit(&huart2, (uint8_t*)main_str, strlen(main_str), HAL_MAX_DELAY); char msg[20]; sprintf(msg, "PRESSED: %c\r\n", pressedKey); // Formats string + char HAL_UART_Transmit(&huart2, (uint8_t*)msg, str

Hi. ST There is an error in the code that is generated by CubeMx when you use 16bit in SPI DMA transfer. Can be solved in the stm32h5xx_hal_msp.c file: /* USER CODE BEGIN SPI4_MspInit 1 */ memcpy(&handle_GPDMA1_Channel1.Init,&NodeConfig.Init, sizeof(NodeConfig.Init)); /* USER CODE END SPI4_MspInit 1 */   maybe ST will look into it? Using:  STM32Cube FW_H5 V1.3.0 STM32CubeMX: 6.12.1 MCU: STM32H573IIKxQ Best regards.  

Hello,I want to generate four 50% duty cycle frequencies up to ~12kHz. It should be possible to enable/disable single outputs. Currently no special high requirements about accuracy, etc. Using a STM32U0 device (56MHz max).My first thought was to use an upcounting timer with four output compare channels where the timer itself is free running (ARR set to max. value). The compare channels are set to toggle on match and on each OC interrupt, the corresponding CCR register value is set to the next equivalent ARR value to toggle again. For example, if the timer is running at 1MHz and 1kHz frequency is needed, 1000 will be added to the CCR. To start/stop the output, I'd modify the corresponding OCxM value between toggle and frozen mode.However, I'm not sure if this is the most efficient way, especially regarding overhead and complexity. Another solution which came to my mind was to use a DDS approach with a (low power) timer, constantly firing interrupts at the needed resolution. On each

iam attatching a pdf of my ki cad , let me know the what prevents to flash my code . this is the below error message coming while iam trying to flash " Starting server with the following options: Persistent Mode : Disabled Logging Level : 1 Listen Port Number : 61234 Status Refresh Delay : 15s Verbose Mode : Disabled SWD Debug : Enabled InitWhile : Enabled Target no device found Error in initializing ST-LINK device. Reason: No device found on target."    could you please verify the circuit  

I try to start working sdMMC with DMA. When D-Cache is not active work well. But when turn it on stop work. Probably need to create MPU region , but where is located used RAM from sdMMC. And if need, how to change .ld file?