STM32 MCUs Embedded software

Hi allFor some reason unknown to me, my PHYSEL bit in GUSBCFG is not setting, and I don't know why static inline void core_initialisation(void) //from page 3403 { // 1. Program OTG_GAHBCFG register: // - Enable global interrupt mask bit (GINTMSK) // - Enable Rx FIFO non-empty interrupt (RXFLVL) // - Set periodic Tx FIFO empty level (PTXFELVL) // Enable global interrupt (GINT) SET_BIT(USB_OTG_HS->GAHBCFG, USB_OTG_GAHBCFG_GINT); // Enable Rx FIFO non-empty interrupt mask SET_BIT(USB_OTG_HS->GAHBCFG, USB_OTG_GAHBCFG_PTXFELVL); // periodic Tx FIFO empty level // Note: RXFLVL interrupt is unmasked in GINTMSK, not GAHBCFG. // 2. Program OTG_GUSBCFG register: // - Set full-speed device mode (FDMOD) // - Select embedded PHY (PHYSEL) // - Set turnaround time (TRDT) MODIFY_REG(USB_OTG_HS->GUSBCFG, USB_OTG_GUSBCFG_FDMOD | USB_OTG_GUSBCFG_PHYSEL | USB_OTG_GUSBCFG_TRDT, USB_OTG_GUSBCFG_FDMOD | USB_OTG_GUSBCFG_PHYSEL | _VAL2FLD(USB_OTG_GUSBCFG_TRDT, 0x09) ); // 3. Un

Hello, I’m working on a project using the STM32H753 controller, and I have a NOR Flash connected via the FMC interface (BANK1 at address 0x60000000). My goal is to use this NOR Flash memory as a USB Mass Storage Device. I’ve attempted the following approaches: Tried formatting the NOR Flash directly from the host PC — this was unsuccessful. Used FATFS to format the NOR Flash and then connected it to the host PC. The PC detects the filesystem and displays the correct disk size, but I’m unable to create any files on the disk from the host. I’ve searched through the ST forums but couldn’t find any discussions related to using FMC-connected external memories as USB Mass Storage. My questions are: Is it possible to use external memory connected via FMC (like NOR Flash) as a USB Mass Storage device? Can a host PC reliably access and write to memories connected to FMC through USB? Are there any examples or reference projects demonstrating this functionality? Any guidance or suggestions would

I am building a device using a STM32H523RET6 microcontroller on a custom board (self-powered, with VBUS detection). My eventual goal is to operate a USB-CDC interface between the board and a computer for telemetry, but since the only standalone USB example I could find in the STM32CubeH5 examples was HID, I am trying to get a HID interface working first. I do not want to use the RTOS for my device. I have attempted to adapt the code from this example, https://github.com/STMicroelectronics/STM32CubeH5/tree/main/Projects/NUCLEO-H563ZI/Applications/USBX/Ux_Device_HID_Standalone to the H523 device, but the program crashes in the function _ux_device_stack_tasks_run when the function ux_slave_dcd_function is called. As you can see from the stack trace, this is called from the USBX_Device_Process() function which is periodically called. I have been unable to find any detailed information or examples pertaining to USB on the H523 device, so any information or

I need to do a 1024 point FFT on the STM32F446RE Eval Board. I try to integrate the CMSIS-DSP Libraries as mentioned in the forum and it creates errors only and I can't even run the program. I need to do a q15 FFT ,but it is not working. Help me to to integrate CMSIS DSP Library with the STM Cube IDE.This is a simple issue and some ones guidance can help me a lot.

I'm working on building an Ethernet infrastructure using LWIP on an STM32H7 series MCU for various purposes. In this setup, I want to avoid using malloc, and instead rely entirely on LWIP’s memory pool system for all memory allocations. Here's the configuration I’m planning to use:MEM_LIBC_MALLOC 0 // Don't use the standard malloc (i.e., disable mem_malloc from libc) MEMP_MEM_MALLOC 1 // Use mem_malloc for allocating MEMP pools MEM_USE_POOLS 1 // Redirect mem_malloc calls to the defined memory pools MEMP_USE_CUSTOM_POOLS 1 // Enable support for user-defined custom pools MEM_USE_POOLS_TRY_BIGGER_POOL 1 // Allow searching for a larger pool if neededIn lwippools.h, I’ll define custom pools with different sizes like this: LWIP_MALLOC_MEMPOOL_START LWIP_MALLOC_MEMPOOL(24, 128) LWIP_MALLOC_MEMPOOL(16, 256) LWIP_MALLOC_MEMPOOL(8, 512) LWIP_MALLOC_MEMPOOL(4, 1024) LWIP_MALLOC_MEMPOOL(4, 1536) LWIP_MALLOC_MEMPOOL_END For RX, I will use the following structure from STM's LWIP exam

I have tried to measurement the current consumption in standby mode but it is too high. I am using the example "PWR_STANDBY_RTC" listed in AN5315, STM32Cube firmware examples for STM32G4 Series which should work in Nucleo Board G474RE. The values I obtained are in the range of 250 microampers which are quite far from the listed in the datasheet which are around 1.4 [microA]. To measure the current I use a X Nucleo LPM01A. Has anybody worked with that example and obtained the reported values from the datasheet?Does anybody know if it could be a kind of "bug" in the microcontroller?. Please read: https://community.st.com/t5/stm32-mcus-embedded-software/how-to-enter-standby-or-shutdown-mode-on-stm32/m-p/145849Following I attach some images.Thanks in advance!   

hey @m.beddi , have you find the solution . i am struck at this too. edit : to reformulate the issue Issue description : I am trying to implement the MSC_Standalone example (USB device mode with SD card) on the STM32469 Discovery board using CubeMX (with USB OTG FS mode). USB initialization appears to work, but the SD card is not recognized or accessible. The program hangs with a timeout error in the SD card command response function SDMMC_GetCmdResp1(), indicating that SD card commands are not completing successfully. I suspect a timing or clock configuration issue, despite trusting CubeMX to handle this. uint32_t SDMMC_GetCmdResp1(SDIO_TypeDef *SDIOx, uint8_t SD_CMD, uint32_t Timeout) { uint32_t response_r1; uint32_t sta_reg; uint32_t count = Timeout * (SystemCoreClock / 8U / 1000U); do { if (count-- == 0U) { return SDMMC_ERROR_TIMEOUT; } sta_reg = SDIOx->STA; } while (((sta_reg & (SDIO_FLAG_CCRCFAIL | SD

Moved from this discussion as it's linked to the embedded software USB and FreeRTOS. My problem has always been that when USB and USART1 are working at the same time, USB as a virtual serial port is not working properly. In my code, two different threads were opened to test, one thread for usart1 and the other thread for the USB virtual serial port. Don't know what's wrong with this?

Hello everyone,I'm working on a project using a NUCLEO-H7S3L8 board, and I have run into a very persistent and unusual problem involving FreeRTOS and a HAL function that I hope the community can provide some insight into.My aim is to build an event-driven data acquisition system. The application uses multiple peripherals (ADC, SPI, UART, I2C, and TIM3 for PWM Input Capture) running in DMA mode. A central FreeRTOS task (StartOSScheduler) waits on an event group for any peripheral DMA to complete. When an event occurs, it collects data from all sources, aggregates it, and sends it as a UDP packet using LwIP.Hardware and Software SetupBoard: NUCLEO-H7S3L8MCU: STM32H7S3L8HxToolchain: STM32CubeIDEFirmware: STM32Cube FW_H7RS V1.2.0Middleware: FreeRTOS (CMSIS-V2 Interface) and LwIPThe Problem: A Halt Inside a FreeRTOS TaskMy application halts without any fault or error when calling HAL_TIM_IC_Start_DMA() inside my main scheduler task (StartOSScheduler).The Critical Clue: The Most Important Pi

Split from https://community.st.com/t5/stm32-mcus-boards-and-hardware/nucleo-h563zi-as-usb-host/td-p/646056 Hi, I am New here.I was trying to connect the USB Barcode scanner to this Nucleo Board. Did you guys find any solution to make the board act as a USB Host.

Hey everyone, I'm working on a project where I'm implementing an algorithm on an STM32H7. As part of the algorithm, I need to compute the square root of a matrix using Cholesky decomposition. I noticed that the CMSIS-DSP library includes a function called arm_mat_cholesky_f32. However, after including CMSIS-DSP through the ioc  (X-ALGO middleware), I can't seem to find this function in my project. Am I missing something here?

Hi, i have been developing custom bootloader with start address at 0x08000000 and a main application at address 0x08003800 were i planned 14KB for bootloader and next 40kb for main app.i can see the bootloader works fine, but bootloader doesnt triggers the main app properly.were this is how i am pointing to the main apptypedef void (*pFunction)(void);pFunction Jump_To_Application;uint32_t JumpAddress;on this __set_MSP(*(__IO uint32_t*) APPLICATION_ADDRESS);were #define APPLICATION_ADDRESS ((uint32_t)0x08003800)could anyone help me to solve the isue?

Hello ST Community,I’m currently developing on the STM32H743 using STM32CubeIDE, with the following configuration:FreeRTOS v1 (CMSIS v1 style tasks)LWIP stack configured in RAW API mode (not using netconn or socket layers)Network communication is up and running, and TCP/IP works as expected.Requirement:I want to monitor or intercept the raw LWIP buffers, especially:RX and TX pbuf contentsPacket payloadsPCB-level metadata...but I want to achieve this without using:lwip_recv(), lwip_send()lwip_select() or POSIX socket APIsGoal:Build a diagnostic/logging mechanism to observe incoming/outgoing TCP/UDP packetsPossibly build a lightweight mirror/sniffer on the MCU itselfDebug real-time network traffic without affecting application-level task logicKey Questions:Can we hook into pbuf_alloc(), pbuf_free(), or similar functions to mirror buffer contents?Is there a safe and clean way to tap into the LWIP receive/transmit paths at the core level?Can tcp_input() or eth_input() be instrumented for m

Hello, I'm working on a project using the STM32F401RE board to perform real-time fault diagnosis on machinery.The board receives vibration data in real-time via a USB-type accelerometer (Digiducer 333D01), and a lightweight deep learning model running on the MCU determines whether the signal indicates a normal or faulty condition.All of this is running under FreeRTOS and must meet real-time constraints. The accelerometer is connected through a USB breakout board (YwRobot ELB050209), and the STM32 board is configured to operate as a USB Host with Audio Class support.The USB connection and device enumeration process (including descriptor parsing) have been completed successfully. Interestingly, the Digidecer 333D01 is recognized as a USB Audio Class device, specifically as a microphone-type interface.The device presents itself with an Audio Control interface and an Audio Streaming interface (Isochronous IN), similar to a standard USB microphone.Although the data represents vibration (acc

Hi, my name is Zaeem Ahmed.I'm currently digging into the STM32F1 HAL and trying to understand it at a deeper level. I'm intentionally not using STM32CubeMX — not because I have anything against it (it’s a great tool) — but because I want to read the HAL documentation and implement configurations manually to better understand what’s really happening under the hood.What I'm looking for:I would really appreciate any good resources, expert tips, or learning strategies that help connect:HAL APIs ↔ Hardware-level understanding from the reference manualThe challenge I'm facing:Often, when reading HAL documentation, I encounter vague or overly simplified explanations. For example:HAL_TIM_Base_Init vs. HAL_TIM_Base_MspInit — the documentation just says one initializes the timer and the other the MSP, which is obvious from the names but not why they're separated or how they work together under the hood.Another example:When initializing timers, there are different functions for different modes (

Hi everyone,I'm working on an STM32H7RS project (NUCLEO-H7S3L8) with the following setup:Bootloader in internal flash (0x08000000)Application in external OSPI flash (XIP) at 0x70000000Using FreeRTOSUsing TIM6 as the HAL time base (not SysTick)Configured using latest STM32CubeMX and STM32CubeIDE (v1.18.1)My current issue is that while HAL_Delay and TIM6 is working, SysTick seems not to work inside of the RTOS as soon as the scheduler starts.I noticed that because ther CPU got caught inside osDelay without throwing an error. I also already checked the NVIC, but it seems pretty fine to me. Did i otherwise miss something what i configured wrong inside my IOC file?  

Hello , I am working with the STM32H755ZI-Q board and configuring it as a USB Host. I’ve successfully tested the USB Host functionality using standard USB devices such as a keyboard and a mouse, both of which are recognized correctly by the host. However, when I connect a USB-to-TTL adapter to the host, it fails to detect or enumerate the device. There is no response or indication that a USB device has been connected. I would appreciate any guidance or suggestions on the following: Are USB-to-TTL adapters supported in USB Host mode by default? Is there any specific configuration or class driver (e.g., CDC class) that I need to enable for this to work? Has anyone successfully interfaced a USB-to-TTL device with STM32 USB Host? This is the output I see on Tera Term after enabling the user log : USBH Event TriggeredEvent : StartPID: 7523h VID: 1a86h Address (#1) assigned. Manufacturer : N/A Product : USB Serial Enumeration done. This device has only 1 configuration. Default configuration

I am trying to perform USB enumeration on an STM32H503.  I am using HAL_PCD_SetupStageCallback inside of the USB interrupt, which is working perfectly: when I plug in the USB cable to the Nucleo board, the interrupt triggers and I can see that the callback is executing.  One thing that doesn't make sense is that the wLength field is always 0x8408 = 33800.  One would expect the field to be 0x12 = 18 for a GET_DESCRIPTOR command, but it's always 33800.  I don't think the host is the problem - it's a typical Ubuntu PC that has worked with plenty of other USB devices in the past - but I'm having a hard time seeing where there might be a problem in the code.  (The cast from hpcd->Setup to USB_SetupTypeDef isn't the problem, in the debugger window I can see that all fields except wLength are exactly as expected, and that 0x8408 is in the hpcd->Setup array as well.)void HAL_PCD_SetupStageCallback(PCD_HandleTypeDef *hpcd) { USB_SetupTypeDef *setup = (USB_SetupTy

Hello,I'm working on a project which includes: W25Q32 (NOR Flash), File system and USB MSC + CDC on STM32U0 series MCU - STM32U073RCT6.Till now, I've implemented these:- SPI setup and communication with the NOR Flash (W25Q32)- For the file-system part, I tried to do it using the FileX but couldn't find relevant resources for "FileX + NOR Flash + SPI + STM32U0 series MCU". So, I found this https://github.com/maxiufeng258/SPI_Flash_Uart_Led_Polling_V1.0 (FatFS + W25Qxx) and implemented the same for my MCU as well. And able to create and mount the file system, create folder, text file and able to scan the disk.- Next for the USB part, I've seen some articles and videos, implemented CDC-ACM using USBX and my laptop (USB host) is able to load the appropriate driver for my MCU (USB device) and able to perform CDC-ACM i.e tested by sending some random text from MCU to laptop.- Now, I want to implement the MSC part as well. But the thing is, I think it'll become difficult to integrat

Hi all,I have a strange issue that I can't wrap my head around.I have an eMMC chip connected to a STM32U5G9The .IOC file is all standard: with the clock config as follows: However, when I start a debugging session I get stuck in the init function like so:It looks almost like the sysTick is not being updated at this point so the whole init just stalls.If I comment-out the MX_SDMMC1_MMC_Init() the whole system runs as intended (having a touchGFX application that boots right after the inits)I am running FreeRTOS right now where I think the whole thing should move to ThreadX but the init function should still function as intended, right? For now I am fine with just verifying if the eMMC can initialize. This is my first time setting up an eMMC so I might have overlooked something basic. Anyone out there with some good insights on this? 

Hi all,I'm working on an STM32-based system using FreeRTOS, LWIP (static IP), and the Eclipse Paho MQTTClient C library.Problem Summary:MQTT connection is successfully established (MQTTConnect() OK).All SUBSCRIBE operations return SUBACK, everything looks fine.MQTTYield() initially runs correctly but after a while:Messages stop arriving or arrive with a delay.Sometimes multiple messages are batched and received at once.Inside MQTTYield(), the deliverMessage() call fails with error code 3 (FAILURE).In net_read(), the recv() function either returns nothing or behaves like a timeout.MQTT_LWIP_SOCKET is enabled.recv() is non-blocking.SO_RCVTIMEO is disabled, but issue persists.cycle() is tested both once and inside a while loop – the same issue occurs.It seems deliverMessage() is not properly triggered after readPacket().This problem does not occur consistently in local/home network with Mosquitto. But in corporate/complex networks, messages stop being delivered.MQTT CONNECT sent...CONNACK

Hello,I have been playing about with the LTDC_Paint example  and have managed to produce screens using my own images.I would now like to start my own project using the STMH750B-DK incorporating the elements of the LTDC_Paint example.I am struggling to work out which files and how is best to copy them into my project.i just need to be able to draw BMPs and text on the screen, i do not need the touch screen funtionality or the save to USB function.Has anyone succesfully incorporated elements of the example into their own project and be able to share an example project of point me in the right direction?? Many thanks, Iain   

How to create a soft start in the initial operation when generating a PWM signal with STM32

hi, am using stm32u585iot dev board i need all power code stop and shutdown and standby code for that board?

Hello everyone, I've designed a custom board with STM32H723ZG, previously based on STM32F767ZG. When I connect board with ST Link V2 prog through SWDIO, SWDCLK and GND, I get response that no target has been detected. I'm currently using ST-Link Utility software. If I desolder H723ZG and replace it with F767ZG, board works completely fine, without any issues. What could possibly be issue, should I order ST-Link V3 prog for the H723 MCU?Please check attached schematic of the board, MCU related stuff is on second page.Thanks everyone in advance! :)