STM32 MCUs Embedded software

how i am config ethernet in the stm32h753xi6 board ?

Hello,I'm working on implementing USB UVC on the STM32N6570-DK board. I generated a project using STM32CubeMX only for FSBL and added the following files manually from the ST USBX example project1 . ux_device_video.c and .h2 . ux_device_descriptors .c and .h3 . app_usbx_device .c and .h4 . app_azure_rtos.c and .hAll files were taken from this example:https://github.com/STMicroelectronics/STM32CubeN6/tree/main/Projects/STM32N6570-DK/Applications/USBX/Ux_Device_Video/Appli However, I did not use USBPD/UCPD in my CubeMX configuration. The ST example uses both USBPD and UCPD and also includes a separate FSBL and Application.Issue:When I flash the my project to the STM32N6570-DK board, the USB device is not enumerating as a UVC device it does not appear in the Windows Device Manager at all.I previously tested a similar setup on an STM32U5 device, and it worked — the UVC device was properly enumerated.Questions:Is UCPD/USBPD required for USB UVC to work on the STM32N6570-DK board?Could

Hello,I'm here on H753, external clock, CPU clock configured to 400MHz. Setup code is generated by CubeMx.If I execute a HAL_Delay() takes twice the time as expected, e.g. 2ms instead 1ms. I checked via GPIO toggle with a scope.The MCO output is correct, so I guess the CPU clock is correct.The system core clock variable is calculated/set to 400MHz after system clock initialization.I remember I watched the same problem on another M7 chip, the SAME70.I fixed it by patching the SYSTICK setup (HAL_SYSTICK_Config) but I'd like to know what is the problem here.It seems to me, the SYSTICK is fed by 200MHz, not 400MHz as suggested in the CubeMx clock tree.Does anybody have experienced this or can share information regarding SYSTICK?Thanks,Jochen

Hello, I am looking at how to abort the MemX_IT functions. Looking through HAL_I2C_Master_Abort_IT, it seems like that only works for the Master API functions and not the mem functions. Are there any HAL functions for Mem Abort?

Hello,I'm trying to run the Ux_Host_VIDEO example from STM32CubeN6 on the STM32N6570-DK board, but UVC camera streaming does not work. The USB device is detected, but no video stream starts. Test Environment:Board: STM32N6570-DKExample: Ux_Host_VIDEO (from STM32CubeN6 package)IDE: STM32CubeIDE 1.18.1Camera models tested: Logitech C270Connection: USB-C OTG (HS) port using USB-A adapter USB host stack detects the device and logs: **** USB OTG HS in HS VIDEO Host ****USB Host Video library started.Starting VIDEO ApplicationConnect your VIDEO DeviceUSB Video Device InsertedPID: 0x825VID: 0x46dUSB Video Host App...Video Device is ready...  No streaming happens after that.Function _ux_host_class_video_alternate_setting_locate() filters out most alternate settings.The condition: if (payload_size >= max_payload_size) causes only a few alternate settings (e.g., >= 7) to be selected, but those don’t work either.Questions:Has anyone successfully tested this exa

Hello everyone. I'm developing Ethernet on NuceloF746ZG board. I'm listening to the UDP on port 1001,where there is datagram incoming every 2ms, but my callback function gets called 96 times, before it stops, and resumes for next 96 times, and so on.This is happening with lwIP and Mongoose.I followed example code, which in the end worked the same. Changing any parameter from increasing Descriptors number, to RxBuffer didn't have impact.I tracked that HAL_ETH_ReadData also gets called 98 times and hangs until it repeats itself. Bellow are attached layout and configurations.I suspect something with ETH_DMA default setup or memory alignment but wasn't unable to track it so far. Any help will be welcomed.

 Working on bidirectional communication between CM4 and CM7 on the STM32H747I-DISCO using FreeRTOS stream buffers (CoreMessageBuffer). One-way communication works fine (either CM4 → CM7 or CM7 → CM4), but both directions at the same time do not work as expected.What Works:CM4 → CM7: Data is sent and received correctly.CM7 → CM4: Works fine when used independently.Current Issue:When both directions are enabled simultaneously, it fails to receive data in both the direction.Memory Section Mapping:Configured dedicated sections for each direction in both CM4 and CM7 linker files:.ld/* CM4 → CM7 */ .xCoreMessageBuffer_section_CM4_to_CM7 : { *(.xCoreMessageBuffer_section_CM4_to_CM7) } > RAM_D3_Z1 .xStreamBufferStruct_section_CM4_to_CM7 : { *(.xStreamBufferStruct_section_CM4_to_CM7) } > RAM_D3_Z2 .ucStorageBuffer_section_CM4_to_CM7 : { *(.ucStorageBuffer_section_CM4_to_CM7) } > RAM_D3_Z3 /* CM7 → CM4 */ .xCoreMessageBuffer_section_CM7_to_CM4 : { *(.xCoreMessageBuffer_section

tima 的pwm输出正确，但是timb的pwm一个周期出现无法reset的情况

I am developing a USB power delivery solution involving the STM32G0B1. I have already followed the tutorials for creating a simple DRP application on a Nucleo devkit and they work as expected.To my understanding there are two paths that we can take; the one is based on FreeRTOS (which comes as a CubeMX software package), while the other is to use a bare-metal flavour of the application with no RTOS.We have already our own special version of FreeRTOS internally in my company, so, in order to use this, I grabbed the do-while loop from USBPD_DPM_Run() that is executed when no RTOS is in place, and I created a FreeRTOS task that runs it. I ended up with the following snippet:while(true) { // Scheduler stuff uint8_t port = 0; uint32_t current_time = HAL_GetTick(); uint32_t next_delay = 0xFF; // Max. delay for (port = 0; port <= USBPD_PORT_COUNT; port++) { if ((current_time - DPM_Sleep_start[port]) < DPM_Sleep_time[port]) { uint32_t port_delay = DPM_Sleep_time[port

I can't find Try.SRC or Try.SNK features for DRP devices in ST's USB C Power Delivery Stack (USBPD Core). Did I miss something?If it is not in the stack yet. Is ST planning to integrate this feature? What timeline are we looking at?Is it easy to implement? I guess I would just need to define Rp or Rd values after initial connection, but will that work with the rest of the stack or will it result in a mess?Has anyone tried or even achieved it? Is there a sample implementation?

Environment：Board: STM32N6570-DKNetwork: RJ-45 Ethernet cable connected to a router, IP obtained via DHCP: 192.168.10.41Client: VLC 3.0.21 (64-bit) on Windows 10Stream URL: rtsp://192.168.10.41:554/streamSymptoms：VLC can successfully open the RTSP stream and display video.The video is very blurry, especially during motion, where details are hard to distinguish.The frame rate is very low (VLC statistics show high frame loss and decoding frame rate below 10 fps).Tried So Far：Increased network caching in VLC to 1000 ms.Questions：Why does VLC show blurry and low frame rate video when playing the same RTSP stream? Is it due to a low default bitrate or misconfigured encoding parameters?In the NetX Duo RTSP example, how can we correctly set H.264 bitrate, IDR (keyframe) interval, and RTCP minimum report interval to ensure clear image quality with minimal frame drops?What other common factors could cause blurry video and low frame rat

Hello everyone! I'm working on a project using an STM32U575 microcontroller, and I need to manage an SD card (read, write, etc.) via SDIO in 1-bit mode, but without using FreeRTOS. I noticed that FatFs is not natively supported for this MCU in STM32CubeMX, and the recommended alternative is FileX, which is tightly integrated with FreeRTOS. However, due to project constraints, I cannot use an RTOS. So I'm trying to manually integrate FatFs into the project, but I'm running into some difficulties with the integration and compatibility. I was wondering: Has anyone already done this kind of integration? Is it possible to use FileX in standalone mode, without FreeRTOS? Do you have any examples, documentation, or code references for using FatFs or FileX standalone on STM32U5 series? Any help, advice, or shared experience would be greatly appreciated. Thank you in advance and have a great evening! Stefano

Hi,Im trying to configure SDMMC 4 wide bus with FATFS for SD card.Im not able to see any DMA options or Platform setting to set SD detect GPIO pin.am I missing something? I have refered through most of the documentation and tutorials online but with this MCU there is no options for DMA or Platform settings menu in .ioc configuration.Could you please help me with a procedure to setup SDMMC and FATFS for this MCU?Thanks    

Hi,I'm currently using an STM32G0B0CET6 and encountering an issue with writing a uint32_t variable to EEPROM using Write_U32_Variable(). The function works correctly during task initialization and in normal bare metal while loop too, but it fails when I try to save the variable at runtime (EE_WRITE_ERROR).This code was previously working without issues on an STM32G0B0KET6. I have configured the EEPROM emulation with START_PAGE_ADDRESS set to 0x08040000U and NB_OF_VARIABLES defined as 781.Could you help review or suggest changes to ensure compatibility with STM32G0B0CET6?void DaQ(void *argument) { /* USER CODE BEGIN DaQ */ Write_U32_Variable(__OPERATING_MODE, 12); // Working /* Infinite loop */ for(;;) { Write_U32_Variable(__OPERATING_MODE, 14); // Non-working osDelay(30000); } /* USER CODE END DaQ */ } bool Write_U32_Variable(uint32_t variable_id, uint32_t value){ /* Declaring 8-bit unsigned integer to store the EEPROM read/Write Status */ bool return_variable = true; u

I am using two STM32H503 boards.  One is programmed as an I3C controller, the other as an I3C target.  My goal is to have the target send an IBI on the bus and the controller will receive the IBI and then immediately issue a pended read -- there will be no stop condition on the bus after receipt of the MDB of the IBI, the controller will issue a repeated start and then perform the read.  The target will issue the IBI and then be ready to immediately respond with the data to transmit.  So, I'm assuming I will need to pend the write on the target before issuing the IBI.I am looking at the controller diagram for IBI on figure 670 on page 2175 of RM0481 Rev 2.  There is the following note with 2 asterisks :Repeated start (Sr) if there is a pending transfer to execute and if I3C_DEVRi.SUSP = 0, else stop (P) in push-pull Is there any information or example on how to pend an I3C read to happen immediately after the IBI with no stop -- just a restart? Also,

I am connecting a TCP/IP stack to the HAL_ETH driver of an STM32F7xx. I am using https://github.com/STMicroelectronics/STM32CubeF7/blob/master/Projects/STM32F767ZI-Nucleo/Applications/LwIP/LwIP_HTTP_Server_Netconn_RTOS/Src/ethernetif.c as a starting point. I see that low_level_output() calls HAL_ETH_ReleaseTxPacket() only if the ethernet driver runs out of DMA descriptors:  do { if(HAL_ETH_Transmit_IT(&EthHandle, &TxConfig) == HAL_OK) { errval = ERR_OK; } else { if(HAL_ETH_GetError(&EthHandle) & HAL_ETH_ERROR_BUSY) { /* Wait for descriptors to become available */ osSemaphoreWait( TxPktSemaphore, ETHIF_TX_TIMEOUT); HAL_ETH_ReleaseTxPacket(&EthHandle); errval = ERR_BUF; } else { /* Other error */ pbuf_free(p); errval = ERR_IF; } } }while(errval == ERR_BUF); It seems like HAL_ETH_ReleaseTxPacket() will then deallocate all completed buffers and block if none of the scheduled buffers has been completed yet. So far so good. But:I

Hi everyone,I'm building a watchdog application on the STM32 NUCLEO-U385RG-Q using the Arduino IDE and the IWatchdog library. Since the library doesn’t support early interrupt callbacks, I modified it by adding some LL code (afterLL_IWDG_SetReloadCounter()) inside IWatchdogClass::set() as shown below. However, the early interrupt doesn’t trigger. Am I missing something, like NVIC config or enabling the interrupt line? LL_IWDG_SetEwiTime(IWDG, (uint32_t)EWITimeout); LL_IWDG_EnableIT_EWI(IWDG); Arduino Code#include <IWatchdog.h> extern "C"{ #include <stm32u3xx_ll_iwdg.h> #include <stm32u3xx.h> } extern "C" void IWDG_IRQHandler (void){ Serial.println("Wake up Interrupt"); } void setup(){ Serial.begin(115200); __enable_irq(); // Enables global interrupts HAL_NVIC_SetPriority(IWDG_IRQn, 0, 0); HAL_NVIC_EnableIRQ(IWDG_IRQn); IWatchdog.begin(10000000); }After further debugging, I found that EWI timeout is not being set if EWI interrupt is enabled and when&nb

Hi guys,I'm coming from Arduino and recently started working on a project where I need a protocol that supports bidirectional communication between MCUs and Hot-Join.I decided to give I3C with the STM32H5 a shot and got myself some Nucleo-H503RB boards.Based on the example projects from ST on GitHub:https://github.com/STMicroelectronics/STM32CubeH5/tree/main/Projects/NUCLEO-H503RBI got these things working:Target sends a Hot-JoinController detects it and assigns a dynamic addressIBI from the target is received on the controllerWhat doesn’t workI can’t get regular data communication working.For example, I want the controller to send a string on a button input like "ping" to the target, and the target should respond with "pong".From my understanding, communication in I3C works something like this:Target to Controller:Target sends IBIController receives IBI and starts listening using HAL_I3C_Ctrl_Receive_IT()Target sends data using HAL_I3C_Tgt_Transmit_IT()Controller receives data in HAL_

Could you please explain why global interrupts are disabled (using __disable_irq()) at the beginning of the LPTIM_Disable() function, and re-enabled at the end?Does this relate to ensuring atomicity during the timer's register save/restore process, preventing potential race conditions during clock source reconfiguration, or avoiding unintended interrupt triggers during the reset sequence?"void LPTIM_Disable(LPTIM_HandleTypeDef *hlptim) { uint32_t tmpclksource = 0; uint32_t tmpIER; uint32_t tmpCFGR; uint32_t tmpCMP; uint32_t tmpARR; uint32_t tmpOR; #if defined(LPTIM_RCR_REP) uint32_t tmpRCR; #endif __disable_irq(); /*********** Save LPTIM Config ***********/ /* Save LPTIM source clock */ switch ((uint32_t)hlptim->Instance) { case LPTIM1_BASE: tmpclksource = __HAL_RCC_GET_LPTIM1_SOURCE(); break; #if defined(LPTIM2) case LPTIM2_BASE: tmpclksource = __HAL_RCC_GET_LPTIM2_SOURCE(); break; #endif /* LPTIM2 */ default: break; } /* Save LPTIM configuration registers */ tmpIER = hlptim-&gt

On STM32F4, when you choose PLLCLK as the MCO1 source, does the HAL actually routes the PLL output going into SYSCLK, i.e. after the PLLP division?#include <Arduino.h> #include <RCC.h> void SystemClock_Config(void) { RCC_OscInitTypeDef RCC_OscInitStruct = {0}; RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; __HAL_RCC_PWR_CLK_ENABLE(); RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState = RCC_HSE_ON; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; RCC_OscInitStruct.PLL.PLLM = 25; RCC_OscInitStruct.PLL.PLLN = 336; RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4; RCC_OscInitStruct.PLL.PLLQ = 7; if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { Error_Handler(); } RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2; RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.AHBCLKDivider = RCC_

Hello there,I cant find full working example about ram initializations and relevant RISAF settings,I need to get at least 2.5MB region for camera data capture, I found clk and power enable functions, but it does not working, when I increase memory size in .ld file the code does not run...I guess I use correct clk and power registers:__HAL_RCC_AXISRAMx_MEM_CLK_ENABLE();RAMCFG_SRAMx_AXI_NS->CR &= ~RAMCFG_CR_SRAMSD;I use FSBL and my code will fit there not reaching 512KB limit.CubeMX do not have a lot of settings there, RISAF do not have default values or some help hints which there can help, and there is no memory map window like let say for H7 and other mcu's...How to correctly initialize and use all the RAM ?Thanks.

Hello everyone,  I'm currently working on Ethernet communication between my STM32H563ZI and a TP-Link router. They are connected by Ethernet, and I'm trying to ping the router with my STM32. All is going on, except the DHCP who don't want to connect (I keep the code because my be it can be a solution)  But, when I see the status of icmp_ping, it tells me 0x29 (NX_NOT_SUCCESSFUL). I'v tried a lot of things, changed the Ethernet cable, nothing changed.  Do you have any idea form where it comes ? Here is my app_threadx, app_netxduo and my main code.    /* USER CODE BEGIN Header */ /** ****************************************************************************** * @file app_threadx.c * @author MCD Application Team * @brief ThreadX applicative file ****************************************************************************** * @attention * * Copyright (c) 2025 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that

I have USB2 OTG high speed port1 working in "device mode" on the STM32N6570-DK board. I need to transfer an image file (around 10 MBytes in size) from the external PSRAM IC (APS256XXN-OBR-BG Hexadeca‑SPI PSRAM) to external PC via  a bulk CDC IN endpoint. I am able to do this currently without DMA enabled by repeatedly calling CDC_Transmit_HS( ) and waiting for the transmit done interrupt  before sending the next segment. I now want to do this with DMA enabled so that I get one transmit done interrupt instead of one per segment. I only have 3 endpoints (in end point 0, out end point 0 and one bulk in end point). Note that I am not using USBX. When I try enabling DMA in USBD_LL_Init(  ) by setting " hpcd_USB_HS.Init.dma_enable" to "ENABLE", the board does not enumerate. What am I missing ?Thx

Hello STM32 Community,I am working on the STM32F769I-DISCO board and would like to implement UDP communication using LwIP with FreeRTOS.I have already downloaded the STM32F7 series example projects, and I see that the LwIP_HTTP_Server_Socket_RTOS example is available. This project uses FreeRTOS and a TCP socket for HTTP communication. I would like to know how I can modify or use this example project to implement UDP-based communication (sending and receiving UDP packets). or any different way I should use.Could anyone guide me on the steps required to convert or extend this example to support UDP communication over LwIP in FreeRTOS?Any code examples or suggestions would be highly appreciated.Thank you!

Hi. I have a problem while using lwip and freertos. The board is based on stm32h743vih. The mpu configuration is done correctly i think. My problem is after i start udp server and start to send data with udp, everything is ok, but after a while i will enter a loop in xQueueSemaphoreTake an in the configASSERT( pxQueue->uxItemSize == 0 ). I searched a lot and i saw this: https://community.st.com/t5/stm32cubemx-mcus/cubemx-lwip-ethernet-link-thread-bug/m-p/126556 I did what it said but this time when it happens im not in the loop but the other tasks get very slow and actually a task with osdelay(1) is executing every 1 second. What should i do?