STM32 MCUs Embedded software

Hi, I’m working on an STM32G491 MCU and facing an issue with GPIO PB9.In my project, I initialize PB9 as a digital output and try to set it HIGH, but the pin always stays LOW on the board.However, if I configure PB9 as input and toggle the pin externally in the same circuit, I can read HIGH and LOW correctly.Why would PB9 not go HIGH when configured as output? What could be the possible reasons or things to check?

Hello ST Team,I am using an STM32H755ZIT6 where CM7 handles a high-speed Quad-SPI flash interface with 100Mhz and UART communication with flow control 115200 baud.The same firmware runs on two hardware revisions:Revision V2: Works perfectlyRevision V3: Same firmware → occasional failure in UART frame processingThe QSPI itself receives data correctly (verified with CRC), but the “end of frame” indication is occasionally not processed.Observed Firmware Behavior1. Using RTOS Event Flags (original implementation)In the UART receive callback, when “end of frame” (EOF) is detected, we set an RTOS event flag:  osEventFlagsSet(dataReceiveEvent, DataReceived);Problem on V3:Sometimes the event flag is not triggeredEven though all received bytes are correctCRC validation passesThe callback executes, but the main task does not wakeThis leads to missed packets even though the data is fully received.2. Switching to Polling Loop (temporary workaround)We replaced the RTOS event flag with a s

Hello Everyone,I designed pcb while to use STM32H723VGT6. I used an Ethernet phy called DP83848 to communicate via Ethernet.I have previously used this Ethernet phy with F4 series processors and communicated via Ethernet without any problems. I am using CubeIDE version 1.18.0. I make the settings from CubeIDE as follows.I am setting RMII mode in ETH from connectivity. I am changing MAC address and i am enabling ethernet global interrupt from NVIC.I am enabling LWIP from Middleware and software Packs. I am disabling DHCP Module and i am setting IP and Subnetmask from general settings. Then I set my phy from platform settings. Only LAN8742 appears in the list.I build the code by selecting this Phy.Then I add the dp83848.c and .h files that I generated for the F4 series to my own project. In ethernetif.c, I replace everything related to LAN8742 with DP83848 functions. All of the functions have the same name. I build the code and no problems occured during the build.I uploaded th

stack:Zephyr on stm32n6 (nucleo_n657x0_q)When sending a buffer over sai via i2s_write data is written into the buffer.I expected the TX buffer to be treated as read-only and remain unchanged by the driver.It's only ever the first 2 numbers.Why is that?  Example code:int16_t tx_block_test[96] = {0}; In attachment a minimal version of a project that displays this issue.

Hi everyone, I'm encountering an issue with the STM32H747 dual-core MCU during the transition from bootloader to application. Here's a summary of the setup and observed behavior: Setup: Bootloader (CM7 core): When the BCM4 option byte is enabled, the CM4 core starts as expected. Application (CM7 core): After the bootloader jumps to the CM7 application, the CM4 core stops responding. What We have Tried : Manual CM4 Enable in Application Disabled CM4 in option bytes. Attempted to enable CM4 manually in the CM7 application:                  SYSCFG->UR1 = (1 << 0); // Set BCM4 = 1                   RCC->GCR |= (1 << 3);   // Set BOOT_C2 = 1 Result: System hangs. Recovery requires setting BOOT pin = 1, flash erase, and reprogramming. The issue seems to be with SYSCFG->UR1 = (1 << 0)       2. Option Byte Update via Flash APIManual CM4 Enable in

I'm going to use the STEVAL-MIC008A Dual MP23DB01HP MEMS daughter board with the STM32N6570-DK (by connecting to CN5). I looked at the STM32N6570-DK example project MDF_AudioRecorder and noticed that for using on board MIC (only one micophone) it uses instance0 (MDF1_SDIO, Pin PE8) with the following configuration:Bitstream Matrix: Falling frontInterleaved mode: No (which makes sense since it uses only one MEMS microphone)Since the STEVAL-MIC008A includes two microphones that share the same data and clock lines, can I still use instance 0 to receive interleaved data (left and right channels) from the STEVAL-MIC008A, or do I need to enable instance 1 as well? 

Hi all,Is there documentation that shows the ThreadX functions with an explanation of the function's parameter? and which are mandatory and which optional?This is an example of a simple function call generated by cubeMX: /* Create tx first thread. */ tx_thread_create(&tx_app_thread, "tx first thread", tx_first_thread_entry, 0, pointer, TX_APP_STACK_SIZE, TX_APP_THREAD_PRIO, TX_APP_THREAD_PREEMPTION_THRESHOLD, TX_APP_THREAD_TIME_SLICE, TX_APP_THREAD_AUTO_START) I can tell what some of the parameters are by looking at their name but not all of them. I read "Azure RTOS ThreadX User Guide" from Microsoft. I've looked at the STM32 wiki and the threadX documentation on github but I can't find a document just for the functions calls (threads, semaphore, queues, etc) and its parameters (even a summary would be good). Is there such a document? Thanks 

Hello, I am using the Zephyr operating system with the STM32U5G9J-DK2 hardware. I intend to collect voltage data using the ADC, but so far, no progress has been made. Here are the steps I have taken: I used the zephyr\samples\drivers\adc\adc_sequence example from Zephyr 4.2.0. I created a new app.overlay file in the root Vmakelists.txt directory with the following content: / { aliases { adc0 = &adc1; }; }; &vbat1 { status = "okay"; io-channels = < &adc1 5 >; };   I compiled using this command:west build -p always -b stm32u5g9j_dk2 --sysbuild . Then I supplied 1V to the PA0 pin (silkscreen labeled PWM/D6), and the log is as follows:     [16:22:28.487] RX←◆*** Booting Zephyr OS build v4.2.0 ***ADC sequence reading [0]: [16:22:29.493] RX←◆- adc@42028000, channel 5, 5 sequence samples: 2684 = 2162mV 1788 = 1440mV 1571 = 1265mV 1532 = 1234mV 1492 = 1202mV adc@42028000, channel 12, 5 sequence samples:

Hi, I'm on a applicaiton involving USBX MSC and FileX. The final memory for the application is a NOR flash so I also use LevelX.Acutally, I'm working on a nucleo-U575ZI-Q without NOR flash so I use NOR Simulator on LevelX.My problem is that a file created with FileX is detected by windows, have the right number of bytes but data are wrong.My program do this:1) FileX format the device2) FileX create the file STM32.TXT and put the data "This is FileX working on STM32". I can see this data on the RAM3) FileX close and open the file STM32.TXT and I can read the text4) FileX close the media.5) USBX open the media and on Windows I see the file STM32.TXT but data are not correct. It's like if this data comes from another part on my RAM.When the device is connected to a computer, I can create new file, write on it then unplug / plug USB and the new file is still here. I can also edit STM32.TXT.Has somebody an idea about why FileX can read right data but windows doesn't read

__LL_ADC_CALC_VREFANALOG_VOLTAGE macro presumes that VREFINT calibration value is from a 16-bit ADC. However, for STM32H723, the value I see (1522) is from 12-bit ADC conversion. So this macro returns incorrect value. On STM32H747, it works as expected (the value is 24074 which corresponds to 16-bit ADC value). I have not found any information about conversion width in the reference manual nor in the datasheet.#define __LL_ADC_CALC_VREFANALOG_VOLTAGE(__VREFINT_ADC_DATA__,\ __ADC_RESOLUTION__) \ (((uint32_t)(*VREFINT_CAL_ADDR) * VREFINT_CAL_VREF) \ / __LL_ADC_CONVERT_DATA_RESOLUTION((__VREFINT_ADC_DATA__), \ (__ADC_RESOLUTION__), \ LL_ADC_RESOLUTION_16B) \ )

Hi. How can I build the Demo FW initially running on NUCLEO-H563ZI ?The is a number of projects in Cube under STM32Cube_FW_H5_V1.5.0\Projects\NUCLEO-H563ZI but it is not clear which one is the factory used to initially program the board. Thanks.  

Hi, I am using an STM32N6570-DK running in XIP mode with XSPIM configured in multiplex mode.Setup:XSPIM in multiplex modeXSPI1 / XSPI2 → Port 2 → external flashXSPI3 → Port 1 → PSRAMXSPI2 memory-mapped at 0x70000000FSBL configures external flash and jumps to the application at 0x70100400(VTOR = 0x70100400, MSP = 0x34200000, PC = 0x7010BA01)Everything works correctly in direct XSPIM mode, but in multiplex mode the application HardFaults or hangs immediately after the FSBL jump.The faults occur during early HAL initialization (e.g., in HAL_MspInit() or MX_GPIO_Init()), specifically when executing functions such as: HAL_PWREx_EnableVddIO3();__HAL_RCC_GPIOO_CLK_ENABLE();HAL_RCCEx_PeriphCLKConfig();  If I comment out these lines, the application runs, but then I face issues whenever adding new peripherals (like UART).It seems that reinitializing power domains or clocks related to XSPI pins while executing from external flash triggers a crash. I am using STM32Cube FW

Hi all,I'm trying to use Livetune to make an mp3 player but it only works once connected to a board. I have a custom Nucleo-U5A9 (originally a Nucleo-U575, I replaced the MCU and added xtal). I'm reading UM3297 Getting started with X-CUBE-AUDIO-KIT and on page 6 (picture below) says:"The connection is successful only if the firmware running on the device includes the Designer communication firmware."I would like to include this "Designer communication firmware" into my custom board/firmware but I can't seem to find any reference to it anywhere. I'm pretty sure is part of the examples firmware but I rather not hunt for it that way unless there is an example for the U5A9 which I don't see. Even so ... this "Designer communication firmware" doesn't seem to be designated as such in the example projects.where is this "Designer communication firmware"? How do I integrate it into my custom U5A9 board?Any help is appreciated... thanks.  

Post edited by ST moderator to be inline with the community rules for the code sharing. In next time please use </> button to paste your code. Please read this post: How to insert source code. Hi,I want to jump to system memory boot with SW using UART1.I tested it using code I found by searching forums and the internet, but it doesn't work.For reference, the STM32G071 shares the BOOT0 and SWCLK pins. By pulling the BOOT0 pin high and resetting the device, I can perform a system memory boot. After that, I connected the UART connect in STM32CubeProgrammer and verified the update. However, after jumping to the code below and pressing the UART connect in STM32CubeProgrammer, the following message appears and the device fails. RTS lowDTR lowSerial Port COM15 is successfully opened.Port configuration: parity = even, baudrate = 115200, data-bit=8, stop-bit=1.0, flow-control=0ffTimeout error occurred while waiting for acknowledgment.Error: Activating device: KO. Please verify the boot mo

Hi : I want to use MTP & HID simultaneously in stm32f103RE, but there is not  CompositeBuilder and MTP in stm32f1 STM32_USB_Device_Library, so can I use stm32f4 STM32_USB_Device_Library directly? Or is there any other solution to use MTP & HID simultaneously in stm32f103RE?

 Issue SummaryOn STM32N6570-DK, enabling ANY peripheral together with ThreadX or FreeRTOS causes an immediate HardFault, even in a minimal CubeMX-generated project with no user code.This includes peripherals such as:DCMIPPLTDCSDMMCUSBUARTI2CSPIGPIO with interruptsDMAAnything beyond simple GPIO outputThe issue is NOT limited to the camera/display pipeline.EnvironmentBoard: STM32N6570-DKIDE: STM32CubeIDE (latest)CubeMX: latest versionFirmware: STM32N6 HAL/BSP (latest)Security Modes Tested:FSBL + Application (secure/non-secure)Non-secure Application only (no FSBL)Both show the same problem.What Works✔ RTOS disabled → All peripherals work✔ Camera + display pipeline works bare-metal✔ GPIO output works with RTOS (LED blink, simple logic)What Fails:cross_mark:ThreadX + ANY peripheral init → HardFault:cross_mark:FreeRTOS + ANY peripheral init → HardFault:cross_mark:Even minimal projects with zero user code crash before scheduler start:cross_mark:Commenting a peripheral moves the crash to

Dear experts,I'm reading RMs for STM32 models with dual flash banks (F4, H7...) and don't quite understand how to use bank switching.Take the firmware update scenario when old firmware is in bank1 and new is programmed to bank2. So it programs some option byte to switch banks and next time should boot from bank2.If the new version is bad, I'd like to boot automatically from bank1. But how? the option byte is written. Is there a way to control bank switch by external pin? On some systems that I've seen before we did it in the following way: we made a simple watchdog (CPLD or whatever) that automatically toggles the boot selector pin. If the CPU does not touch the watchdog in defined time since reset, it will switch the selector pin and reset again.So if the new firmware fails to boot, the system will reboot to the old firmware.I'd like to implement the same on STM32, with external widget if needed, but better without it.On the other hand, for H7 you can define alternative start addresse

Hello Forum,I'm trying to get a simple application, running on a NUCLEO-U5A5ZJ-Q dev board, to jump to the system bootloader from FreeRTOS. I've also got AN2606 to hand (application note for the STM bootloader) and RM0456 (STM32 U5 reference manual). I have been following this guide.  How to jump to system bootloader from application ... - STMicroelectronics CommunityAccording to the guide and reference manuals the bootloader base address on my MCU (STM32U5A5) is at 0x0BF90000.  The 32 bit word at that address is the stack location, and the 32bit work at 0x0BF90004 is the entry point for the bootloader. In my setup values are read as:0x200034E8 - this is valid memory (stack)0x0BF98C39 - this is unexpected as lots of the internet says this should be 0x0BF99EFE but I'm guessing this is actually OK.I currently have this code:#define BOOTLOADER_BASE 0x0BF90000 typedef struct boot_vectable { uint32_t Initial_SP; void (*Reset_Handler)(void); } boot_vectable_t; void Ju

Hi, I'm having really a hard time setting up my ADCs to work with DMA using the STM32F429I-DISC1. My objective:   have a clock source from a Timer at a given frequency as trigger to the ADCs, each ADC would then read a specific pin (let's say ADC1-> pin_x; ADC2->pin_y and ADC3->pin_z). Since nothing is working regardless of the configuration I set, I'm trying with very big time intervals to avoid busy bus and so on. So I've set the TIMER8 to have a period of 5s and tested it individually with the interrupt enabled to make sure it is triggering and having the correct interval. Now the idea is to trigger the ADCs to perform a few conversions of the pins in order to do some oversampling.  Here is my ADCs configurations:             The ADC3 is identical to ADC2. Timer8 Trigger Event Selection is set to "Update Event".   Here is my main function: int main(void) { /* USER CODE BEGIN 1 */ /* USER CODE END 1 */ /* MCU Configurati

 Hi everyone,I was exploring the VENC_SDCard example from STM32CubeN6 v1.2.0, and I was successfully able to record and store video to the SD card after making a few necessary changes mentioned here.Now, I want to record and store the video in grayscale format. After modifying the MX_DCMIPP_Init() function in main.c and the BSP_LCD_InitEx() function in stm32n6570_discovery_led.c, I can correctly see the grayscale video output on the display.However, when I try to record this grayscale stream, the resulting video is distorted.(Attached it)Upon debugging, I suspect the issue originates from the following line in encoder_prepare():preproc_cfg.inputType = H264ENC_RGB565;The inputType is still set to RGB, and after checking the h264encapi.h header file, I found the following enum for H264EncPictureType on line 159: typedef enum { H264ENC_YUV420_PLANAR = 0, /**< YYYY... UUUU... VVVV... */ H264ENC_YUV420_SEMIPLANAR, /**< YYYY... UVUVUV... */ H264ENC_YUV420_SEMIPLANAR_VU, /

Reply to you How to fix SDIO error HAL_SD_ERROR_RX_OVERRUN? - STMicroelectronics Community SDIO data region should be AXI SRAM.  

Hi everyone!I'm trying to figure out what's wrong with my SPI Peripheral continous transmitting/receiving via DMA in Circular Mode. I think I have coded a pretty basic "Hello, World" for working with DMA, I've just generated code from .ioc file and then added a simple logic. This is my main.c:   /* 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 this software component. * If no LICENSE file comes with this software, it is provided AS-IS. * ****************************************************************************** */ /* USER CODE END Header */ /* Includes -------------------------------------------

Using Ux_Device_Audio2.0_PlayBack as an example for STM32H753, I enabled in the .ioc file, but it doesn't seem to be affected in the project. Any idea why?    In the .ioc, I have this `UX_DEVICE_CLASS_AUDIO_FEEDBACK_SUPPORT` enabled... should be affecting ux_user.h      But ux_user.h is not being used in the project, so I don't think it's actually being built into the .elf file. I also can't find the file in the STM32CubeIDE project as well, although it is under `USBX/App/ux_user.h` in the system explorer... Here's the Project explorer in the IDE: and even opening each of those *.c files doesn't reveal ux_user.h.  Lastly, I do have UX_INCLUDE_USER_DEFINE_FILE in the preprocessor: Am I missing something?

Post edited by ST moderator to be inline with the community rules for the code sharing. In next time please use </> button to paste your code. Please read this post: How to insert source code.Hallo,I am trying to measure the frequency of rectangular signals. the borad I am using is stm32f411-discoI used the timer 2 channel 1 for input capture. at every capture the timer value will be sent to memery by uing DMA. The DMA seems working, because I printed the captured value periodically. the DMA-Buffer is two, and it is working in a circular mode.I try to do some calculation in the interruption-function: "void HAL_DMA_XferCpltCallback(DMA_HandleTypeDef *hdma)" like this: void HAL_DMA_XferCpltCallback(DMA_HandleTypeDef *hdma) { if (hdma->Instance == DMA1_Stream5) // MCU-abhängig! { uint32_t first = IC_Values[0]; uint32_t second = IC_Values[1]; if (second >= first) diff = second - first; else diff = (0xFFFFFFFF - first + second); /* Timer läuft mit 1 MHz → 1 µs

The above image represents logic analyzer output when HAL_SPI_Receive_DMA is executed. My doubt is regarding the single high pulse at MOSI line. During HAL_SPI_Transmit_DMA , no issues. Is this normal behaviour? STM as Full duplex master, i have disconnected the slave to check if it was responsible for the high pulse.