STM32 MCUs

Can anyone help to find the error in the code because it is not able to print anything on the console. I have also try to change the pins of UART but then also it is not be to print anything on the console. 

I am testing Ethernet on STM32H723ZGT6 by transmitting UDP packets (1024 bytes) every 1 ms. Setup / Implementation: No CubeMX / HAL used Fully bare-metal Ethernet driver (lwIP integrated manually) Ethernet interrupts enabled and serviced RX handled inside while(1) loop Non-blocking transmit path MPU enabled Memory configuration: RX pool located in AXI RAM lwIP heap: 32232 bytes in D2_SRAM Observed Behavior: System runs normally for many hours (sometimes >12 hours) Eventually UDP transmit stops working Ping continues to work without issues Debugging shows failure occurs at: pbuf_alloc(PBUF_TRANSPORT, len, PBUF_RAM); After failure: 1) pbuf_alloc() returns NULL (ERR_MEM) 2) ETH->DMACSR reads 0 while (1) { sys_check_timeouts(); if (eth_rx_rdy) { eth_rx_rdy = 0; ethernetif_poll(&gnetif); ETH->DMACIER |= ETH_DMACIER_RIE; } if (sys_now() - udp_tx_timer >= 1) // 1 ms transmit interval { ret = udp_server_send(udp_tx, sizeof(udp_tx)); if (ret

Hi im trying to make up a iot curtain right now and using stm32f411re with nodemcu to connect them to my wifi.i am testing all the sensors and wifi sector separated so non of the sensors are connected to stm32 right now just nodemcu and stm32. so i have tested to make a webpage to have a button to light up ld2 led and when i modified the code like below, the mcu still connected to wifi, gave the IP address to connect, but webpage gives me ERR_CONNECTION_REFUSED how do i solve this problem?

Hi everyone,I am experiencing a strange discrepancy in the behavior of HAL_UARTEx_ReceiveToIdle_DMA between LPUART2 and LPUART3 on an STM32U083RCT6.Environment:MCU: STM32U083RCT6IDE: STM32CubeIDE v1.17.0Library: STM32CubeU0 Firmware Package V1.3.0 (Released 04-June-2025)The Issue: I am using HAL_UARTEx_ReceiveToIdle_DMA to handle asynchronous reception of variable-length packets.LPUART2: Works perfectly. When an IDLE line is detected, the DMA transfer stops as expected, and HAL_UARTEx_RxEventCallback is triggered.LPUART3: When an IDLE line is detected, the interrupt is generated and HAL_UARTEx_RxEventCallback is triggered correctly. I am able to handle and process the variable-length packets without any issues. However, the DMA transfer itself does not stop (it remains in an active state), unlike the behavior observed on LPUART2.Configuration: Both instances are configured in STM32CubeMX as follows:Baud Rate: * LPUART2: 230400 bpsLPUART3: 115200 bpsDMA: DMA1 [Channel configuration]Mode

hi im making a project to detact rain and sunlight to give decision to close the curtain refusing the user to change the value of the curtain closed. i am currently using NUCLEO-F411RE board with NodeMCU v3 using the NodeMCU just as middle man to connect them into my home wifi. Currently, the problem is everything seems working fine until securing the connection between STM and wifi router, but when i use my phone or laptop to get connection to the webpage that STM builds, ERR_CONNECTION_REFUSED occurs. I have tested that both board is working fine, i have disconnected all the sensors as i am just testing on the wireless connection. I have attached the main.c file the ESP8266 file and the ringbuffer file so that it might be easier for me to get some help

Hi,The input to the MCU is basically 1-bit (0/1 values), but it would be better if it could process multiple bits.The input is at 150MHz, and 10,000 data items are received at once. The MCU must store them in uint8_t data[10000]. When a 1-bit value is received, data[10000] contains 0/1 values. For the next data item, the 0/1 values ​​must be accumulated and added for calculation.This is what I’ve come up with:1) GPIO: 150MHz input is not possible.2) ICP + DMA: It seems possible, but it doesn't seem to work. ICP cannot  reliably capture 150MHz, and DMA doesn't seem to be able to store data in SRAM.3) DCMI or DCMIPP: 8-16bit data can be processed, and accumulation is possible using DMA. However, the maximum speed is 80MHz or 120MHz.Is there a model among the stm32 models that can do this on its own mcu?

Hello Everyone,Is there any documentation for ST BLE Sensor Mobile Application I can reference?Thanks in Advance.

Started project (using STM32CubeMX) with STM32C011J4M6 (SO8 package, 16K flash).Using STM32CubeIDEVersion: 1.19.0Build: 25607_20250703_0907 (UTC)Application now requires >16K (flash (code+flash data space) so replaced MCU part with STM32C011J6M6 (SO8 package, 32K flash).After adding content to project source code (a font file, taking the expected total flash space over 16384 bytes) build does not complete.I believe the root cause is that I've not told STM32CubeIDE of change to the larger-flash version of the chip (same family, just larger flash).What file(s) need to be edited to enable the larger flash size (or do I need to revert to STM32CubeMX and then splice the now under-development project source code into the new project? C:/ST/STM32CubeIDE_1.19.0/STM32CubeIDE/plugins/com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.13.3.rel1.win32_1.0.0.202411081344/tools/bin/../lib/gcc/arm-none-eabi/13.3.1/../../../../arm-none-eabi/bin/ld.exe: (MY PROJECT NAME).elf section `.d

Have been fighting ST-LINK_gdbserver over the last few days and am hoping that someone can shed some light.  I'm using JetBrains CLion with the ST-LINK gdb server. I have this configured in the "Debug Servers" setting. I want to get my ITM / printf calls to appear in my "MCU Console" window in CLion. So I have my SWO Enabled, I specify my clock (400Mhz / STM32H743), my divider (1000, should give 400kbaud data coming out), and my TCP port for the SWO data to appear on (59999). I've overridden my `_write` function to push to the ITM_SendChar function.  I press debug, JetBrains compiles, runs the ST-LINK_gdbserver, passes in the correct flags, "-z 59999 -a 400000000 -b 1000 ", and the GDB then connects to the GDB port (61234 - default).  However I don't see any SWO output via ST-LINK_gdbserver. If I run the STM32_Programmer_CLI in a separate terminal window with "./STM32_Programmer_CLI -c port=swd -swv freq=400 portnumber=0", it successfully connect

Hi,I want clarification on STM32 option byte programming.When we write new values to FLASH_OPTR and other option registers:Where are these FLASH option registers physically located?Are they inside the FLASH peripheral (0x4002xxxx region) and not in the option byte Flash area (0x1FFF8000)?When OPTSTRT is set, does the CPU erase/program the option byte pages, or does the FLASH controller hardware automatically erase the option byte Flash area and program it using the values in the FLASH option registers?I want to clearly understand the internal flow between:Option byte Flash memoryFLASH option registersFLASH controller hardwareThank you.

Hey guys I am currently looking for an mcu to get started developing a live stream camera board which should be in 7x80 mm dimensions what mcu should I get ? I think 5x5 footprint should be ok but not sure 6x6 also be ok. I am open any advice also new to hardware design so thanks for all the supports:)

I am trying to bring up the GFX01M2 on a WB55RG board. Following any of the Custom, FlashLoader, or HelloWorld applications (from the X-CUBE-DISPLAY_3-0-0 download) using STM32CubeIDE merely results in a blank LCD. I feel I'm missing something simple, but just can't find it. In each case I have compiled and loaded the files as per the ReadMe instructions. Any pointers appreciated...

Dear community,where can I find the source code for this generated MX66UW1G45G_STM32H7S78-DK_XSPIM1-SFIx.stldr file?I need to load binary files on an sd/emmc flash passing through the OEMiRoT boot that loads the specific external loader I want to implement based on this MX66UW1G45G_STM32H7S78-DK_XSPIM1-SFIx example.  I have already implemented a custom external loader for my sdcard which works fine when loading the binary directly from CubeProgrammer or IAR ide (no mapping mode), however it fails to load the external loader in RAM through OEMiRoT bootloader through a UART serial interface with this command:  .\STM32_Programmer_CLI.exe -c port=COMxx br=xxx -elbl "my_loader.stldr" -w my_encrypted_file.bin "my_custom_address". The same command works fine with the above example when the firmware update new binary is loaded in the macronix flash. Thank you for help 

Hello,I am working with the STM32L476 and would like some clarification regarding the One-Time Programmable (OTP) area.From the reference manual, I understand that STM32L4 devices provide 1 KB of user OTP memory (128 double words). I would like to better understand the following:What exactly is stored in the OTP area? Is the OTP region purely user-programmable, or does ST also store factory calibration or security-related data in this region? Is OTP used internally by the MCU for enforcing Flash security mechanisms such as RDP, WRP, or PCROP, or is it strictly for user data? How is OTP protected ? I am trying to understand the architectural role of OTP in relation to Flash protection and secure boot mechanisms.Thank you.

I have the Nucleo-144 board N657X0Q.It appears to work (i believe there is demo code pre-installed - it is flashing a red led and the frequency changes when I press the user button).  However, I cannot get the Cube IDE or Cube Programmer to work with it.  I am just trying to read memory using the cube programmer as a test.  It connects, gets the information about the board, uploads the loader firmware, and then when it tries to read it gets an error and disconnects.The log file is attached.  I have tried using two different machines as hosts, and tried 2 different usb cables (both are suggestions from several posts I found).  I have tried reducing the speed, and using the "under reset" and "hotplug" modes to no avail.  I have selected the correct external loader before doing the check.  I am using a separate power supply on the user USB to rule out any problems with enough power from the host machines on the USB port.I don't know what to try

Hi,we are trying to get SDMMC1 running on our evaluation boards (STM32H757-EVAL) but without any success so far.To further investigate the issue we started a new project from scratch, using CubeMX with sdmmc1 enabled. It doesn't work neither.btw: board and SD interface are OK. i.e.the demo that came with the board is reading video files from SD card successfully.Please, can someone provide a ruuning setup for Cube-MX (STM32H7 firmware 11 or 12) with the specific settings for Clock Configuration and SDMMC1.We are using CubeMX 1.15, STM32H7 firmware package V. 12.1.The error happens during SD PowerOn(), i.e. there is no response from CMD8, CMD55...Thanks for your helpTom  

I need gateway firmware binary for EU433 + Loriot.for my PNUCLEO LRWAN 3 gateway

Heyho,when enabling the INSTRUCTION cache in STM32H7(33), what must be taken care of?Any cache handling required? Any MPU settings required?As far as I understood that's only required for DATA cache?

In the STM32WB09's Reference Manual, RM0505 Rev 3, Table 8: PA10 and PA11 have SWD modes for their AF4.However, in the STM32WB09 datasheet, DS14210 Rev 6, Table 6 and Table 7: PA10 and PA11 have no AF4. Which one is correct?

I have setup HAL, systems clocks, etc.  ADC 1 & 2 work PC4 (channel 14).  ADC3 with PF3 (channel 9) PF4 (channel 14) or PF5 (channel 15) don't work with the same code.  Port C & F enabled, ADC1-3 clocks enabled. Thanks for your help!   { GPIO_TypeDef *ThePort; int ThePin, TheChannel; ADC_TypeDef *TheADC; ADC_HandleTypeDef hadc; __HAL_RCC_GPIOC_CLK_ENABLE(); __HAL_RCC_GPIOF_CLK_ENABLE(); //PF3 Thermisor ADC3_CHANNEL_9 //PF4 Thermisor ADC3_CHANNEL_14 //PF5 Thermisor ADC3_CHANNEL_15 //PC4 Power ADC12_CHANNEL_14 /* works ThePort = GPIOC; ThePin = GPIO_PIN_4; TheChannel = ADC_CHANNEL_14; TheADC = ADC1; // or ADC2; */ ThePort = GPIOF; ThePin = GPIO_PIN_4; TheChannel = ADC_CHANNEL_14; TheADC = ADC3; // Configure PF3 as Analog Input GPIO_InitTypeDef GPIO_InitStruct = {0}; GPIO_InitStruct.Pin = ThePin; GPIO_InitStruct.Mode = GPIO_MODE_ANALOG; GPIO_InitStruct.Pull = GPIO_NOPULL; HAL_GPIO_Init(ThePort, &GPIO_InitStruct); // Enable ADC3 Clock __HAL_RCC_ADC1_C

Hi everyone,I am experiencing an issue with STM32CubeMX version 6.16.0 while working on an STM32U375xx based project.When I set the Toolchain/IDE to CMake, the code generation process completes successfully, but the linker script (STM32U375xx_FLASH.ld) is missing from the project structure. I have checked both the root directory and the cmake/ folder, but the file is nowhere to be found.Interestingly, if I switch the Toolchain to STM32CubeIDE, the .ld file is generated as expected. This suggests a potential issue or a change in behavior specifically for the CMake generator with the new U3 series in this version of CubeMX.Environment details:MCU: STM32U375xxSTM32CubeMX Version: 6.16.0Toolchain: CMakeHas anyone else encountered this problem? Is there a specific configuration I should check in the Project Manager to ensure the linker script is included in the CMake output?Thanks for your support!Best regards,Gianni

Hi all,I am a beginner working with the STM32N6570-DK development kit using STM32CubeMX(V6.16.1) and STM32CubeIDE (v2.0.0). I am looking to deploy an AI model from the ST model zoo and need guidance on the proper configuration for integrating the camera and display modules. Could anyone provide a step-by-step cub MX project configuration for camera and display interfacing. RegardsSradha

HiI am new to display and camera interfacing, as well as the STM32N6570-DK. For a project, I want to display the output from the camera (come along with STM32N6570-DK) into the display included with STM32N6570-DK. Could you explain the necessary configurations in STM32CubeMX and how to write the code in STM32CubeIDE to interface these components?My Tool version infoCube IDE 2.0.0Cube MX 6.16.0Best RegardsRanjith

Hello ST Team,I am working with the STM32N6570-DK board and trying to display the live camera feed on a TouchGFX application.I cannot find any ready-to-use example that integrates DCMIPP (Camera) and TouchGFX.Current Situation:TouchGFX Designer: I have created a UI with a transparent area in the center (Alpha = 0) to display the camera feed. (Please see the attached screenshot).Cube IDE Firmware:  I found the DCMIPP_ContinuousMode example and confirmed that it works fine independently. However, merging it into a TouchGFX project manually is quite difficult for me.My Question:Is there a simple, official example or Application Note demonstrating Camera Preview (maybe on Layer 0) + TouchGFX UI (maybe on Layer 1) for the STM32N6570-DK?Since I am new to the STM32N6 series, a detailed, step-by-step explanation would be very helpful.I would appreciate a quick guide or a GitHub link.Thanks.

Hi ,I'm developing a product on an STM32N6 using TouchGFX. I need to display the image coming from the camera input on the product on the TouchGFX. During our tests, we were able to directly print the image from the DCMI input to the screen and it worked. However, we need an example that takes this image and displays it on the TouchGFX. The AI ​​example prepared for the N6 actually includes this type of work, but the code is not accessible. Could you please share the relevant project or the relevant part so I can integrate it into my project, or could you provide an example project for this?