STM32 MCUs Embedded software

I create A project for STM32F411 Discovery board with STM32CubeIDE 1.19.0 and coding :   while (1) { /* USER CODE END WHILE */ MX_USB_HOST_Process(); HAL_GPIO_TogglePin(LD3_GPIO_Port, LD3_Pin); HAL_Delay(500); /* USER CODE BEGIN 3 */ } and don't set anything else. (I saw that the connection settings for the leds were automatically created when Creating project) i Build and Run code sucessfully but i dont see led Blink. Thanks Edited to apply source code formatting - please see How to insert source code for future reference.

Hello. This is my first week with MCU's. I choose STM and want to stick with it. But it makes only pain :) So I was able to make some GPIO to work but have a complete disaster with LCD. The board came with some demo firm, and it was erased. So I am dealing with a complete new firmware. My helper is a chat GPT but he cant fix my Purple screen. I want to print some basic text like "Hello" and have no luck. Adding code here. Please advise that else I can share so there will be a clear mistake I made. Thank you.  /* 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

Hi all static HAL_StatusTypeDef USB_CoreReset(USB_OTG_GlobalTypeDef *USBx) { __IO uint32_t count = 0U; /* Wait for AHB master IDLE state. */ do { count++; if (count > HAL_USB_TIMEOUT) { return HAL_TIMEOUT; } } while ((USBx->GRSTCTL & USB_OTG_GRSTCTL_AHBIDL) == 0U); count = 10U; /* few cycles before setting core reset */ while (count > 0U) { count--; } /* Core Soft Reset */ USBx->GRSTCTL |= USB_OTG_GRSTCTL_CSRST; do { count++; if (count > HAL_USB_TIMEOUT) { return HAL_TIMEOUT; } } while ((USBx->GRSTCTL & USB_OTG_GRSTCTL_CSRST) == USB_OTG_GRSTCTL_CSRST); return HAL_OK; } at the USB_CoreReset function, my code keeps on getting stuck at the count++ and doesn't progress from there. I have even included   RCC->AHB2ENR1 |= RCC_AHB2ENR1_OTGEN; // enable USB OTG HS clock RCC->AHB2ENR1 |= RCC_AHB2ENR1_USBPHYCEN; // enable ULPI clock before that function call but it does nothing.My board is stm32u5g9

Hello Community, I am trying to initialize SD card with FileX middleware standalone with my Nucleo-U545RET6Q board. I have initialized SDMMC1 with SD 4 bit wide , 48MHz with 0 divider. Later i had to put divider by 2 because the code was stuck at fx_media_open(); here is the picture:   Later I have initialized the FileX middleware with SD interface, without changing any parameters. I then, edited the app_filex.c using code found with RTOS Based SD File edit program in U5 families.  This is my app_filex.c file /* USER CODE BEGIN Header */ /** ****************************************************************************** * @file app_filex.c * @author MCD Application Team * @brief FileX applicative file ****************************************************************************** * @attention * * Copyright (c) 2021 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that can be found in the LICENSE file * in the root directory

Dear all,could need some advice how to continue debugging, IO am using an STM32F4- TIM1 capture compare IR enabled with highest priority (even above Time Base) - c&c callback just toggles a PIN two timesinline void HAL_TIM_OC_DelayElapsedCallback(TIM_HandleTypeDef *htim) { HAL_GPIO_TogglePin(DEBUG_PIN_GPIO_Port,DEBUG_PIN_Pin); HAL_GPIO_TogglePin(DEBUG_PIN_GPIO_Port,DEBUG_PIN_Pin); return; }- IR is called every 13us. However, sometimes the pin seams stuck for ~10us and then recovers.checking carefully, the next double toggle is also a bit late but the overall timing for the over next is fine.So looks to me that something interrupts my interrupt and delays it. But what should this be if it has already highest priority ?Any suggestions ? BR,BastelBaus

Greetings, I have a question about the touchsensing module. I am using a stm32u585rit6 mcu in a custom-made board and making a project using azure rtos. I needed to add touchsensing. I watched the app_azure_rtos_config.h and noticed that there is static memory allocation via threadX memory pools (#define TOUCHSENSING_APP_MEM_POOL_SIZE   5000). Then, at the app_azure_rtos.c file there is the following: __ALIGN_BEGIN static UCHAR tsc_byte_pool_buffer[TOUCHSENSING_APP_MEM_POOL_SIZE] __ALIGN_END; static TX_BYTE_POOL tsc_app_byte_pool; if (tx_byte_pool_create(&tsc_app_byte_pool, "TOUCHSENSING App memory pool", tsc_byte_pool_buffer, TOUCHSENSING_APP_MEM_POOL_SIZE) != TX_SUCCESS) { /* USER CODE BEGIN TOUCHSENSING_Byte_Pool_Error */ /* USER CODE END TOUCHSENSING_Byte_Pool_Error */ } else { /* USER CODE BEGIN TOUCHSENSING_Byte_Pool_Success */ /* USER CODE END TOUCHSENSING_Byte_Pool_Success */ memory_ptr = (VOID *)&tsc_app_byte_pool; status = MX_TOUCHSEN

Hello, I am trying to utilize the USB peripheral in STM32cubeIDE with the STM32H7S78-DK. It hangs forever in MX_USB_INIT on a function USB CORE RESET. With FS and HS this same issue seems to be happening. Pictures show config in the GUI and the aforementioned function.

    Dear supporters,In a project I want to create a feedback mechanism to keep the top of a pulse-shaped signal between boundaries. Most of this seems working, except the control of the DAC channel, that should output a voltage for the diode-laser which produces the pulse to be controlled. Whatever I try, I get a more or less constant block shaped signal of 3.3V during ~7us and 0V for 5us. I checked the Reference Manual for the STM32H723VG processor chapter 31 but did find any clue.In pseudo code I do the following:    - declare a DAC variable (DAC_HandleTypeDef hdac1; , auto-generated)    - initialize the DAC within 'main.c'  ( MX_DAC1_Init(); , auto-generated)/** * @brief DAC1 Initialization Function * @PAram None * @retval None */ static void MX_DAC1_Init(void) { /* USER CODE BEGIN DAC1_Init 0 */ /* USER CODE END DAC1_Init 0 */ DAC_ChannelConfTypeDef sConfig = {0}; /* USER CODE BEGIN DAC1_Init 1 */ /* USER CODE END DAC1_Init

Hi,When I was using the STM32H743ZI chip, I set the system frequency of the chip to 160 MHz. Only enable the ICache, do not enable the DCache and the MPU.According to the prompt from CubeMX, the maximum peripheral clock is 240 MHz. Therefore, I configured HPRE as 1, as shown in the following figure:During the test, I found that if I disabled the ICache, LWIP was unable to obtain the IP address.If I configure HPRE as 2, LWIP can successfully obtain the IP.Using Wireshark to capture the data on the network, no DHCP protocol was found. That is to say, the Ethernet data was not sent out. However, during the debugging process, the Ethernet data was sent out through the sending function.Using a logic analyzer to test the data of the MDIO bus under the two configurations, I found that the MDIO versions automatically parsed by the logic analyzer were different. However, the values of all the registers of the PHY were the same in both cases, except for the status register. The test results of t

Hi All,I do struggle with high-cycle flash read.By using the example:https://github.com/STMicroelectronics/STM32CubeH5/tree/main/Projects/NUCLEO-H563ZI/Examples/FLASH/FLASH_EDATA_EraseProgramIt is doable to erase/write sector or halfword but reading from address (with simple memcpy) without writing/erasing it just before causes NMI_Handler().How to init/configure the EFLASH to simply retrieve data after startup?Write function: HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD_EDATA, address, (uint32_t)&halfword)Read 'function':uint16_t halfword = *(uint16_t*) address;Regards,Mat

Hi,I have an issue with the UASRT communication being abnormal.First case:Access System Bootload Mode by Options bytesAccess the Main Application by the UART protocol ( UART2)Send the first UART packet to the ST MCU via UART2 that contains the UART error code: 0x4 (Frame Error)Send the same UART packet to the ST MCU via UART2 again without the UART error codeSecond case:Using IDE Debug Mode, break at main()Send a UART packet to the ST MCU via UART2 without the UART error codeI tried to De-Init and Re-Init the UART2, which I expect to reset all the UART2 register values before I send the UART packet. According to my test case, could I say that the UART error code 0x4 is due to System Bootload Mode?How could I fix the issue?Please let me know if more information is required.

Hi Team, I'm new to STM32H7 controller. I've started exploring the shared memory in this dual core controller. I found a great one from MAJERLE. Thanks for that. I used the same concept and made a Flag to check for new data to read and write, it was working okay.  But, the time gap between write to read was so huge. I'm not getting why it's so. Then, I tried to poll the while(1) loop by toggling GPIO, to see how frequently it is polling the flag, but I found that the while(1) loop itself running very slow, unable to figure out what causing it slow. Please, guide me to resolve this issue. My requirement is that, I'm trying to share the some amount of data between M4 and M7  at very fast frequency. Suggest the best way to handle this problem.--------------------------------------------------------------------------------------------------------------------------------common.h /* Buffer from CM4 to CM7 */ #define BUFF_CM4_TO_CM7_ADDR MEM_ALIGN(SHD_RAM_START_ADDR) #de

I have generated the code generated from MCSDK 6.4.0 for the micro STM32G431CB to STM32G431RBT6 micro.My understanding is all the Hall drivers remain the same, the startup file and the .ld file will vary based on the micro controller. But i am running into the issue where ADC2 handler is getting called which it shall not as long as the PWM is OFF. There is one signal handler called as shown above i am not sure what it is? I have been struggling to understand, please help.

I have implemented microros on an stm32 nucleo f446re and wrote a publisher in it, while using default qos the messages published can't exceed the frequency more than one hertz even after removing the delay function.....Is there any way to increase the speed of the message publishing  this is the code of the thread void StartDefaultTask(void *argument) { /* USER CODE BEGIN 5 */ // micro-ROS configuration rmw_uros_set_custom_transport( true, (void *) &huart2, cubemx_transport_open, cubemx_transport_close, cubemx_transport_write, cubemx_transport_read); rcl_allocator_t freeRTOS_allocator = rcutils_get_zero_initialized_allocator(); freeRTOS_allocator.allocate = microros_allocate; freeRTOS_allocator.deallocate = microros_deallocate; freeRTOS_allocator.reallocate = microros_reallocate; freeRTOS_allocator.zero_allocate = microros_zero_allocate; if (!rcutils_set_default_allocator(&freeRTOS_allocator)) { printf("Error on default allocators (line %d)\n", __LINE__); } // micro

I am just a bit confused about how the CDC examples using USBX work. In the sample I've seen it seems that the code sets up some sort of UART to USB bridge. I think I don't need the UART and wanted to send and process data like the classic library used to do. However, when I remove the UART code, the device enumerates but USBD_CDC_ACM_Activate is now never called. Is the UART essential to using USBX or did I miss something in refactoring the program?

Edit by ST Moderator: This post has been translated from Chinese to comply with the ST Community Terms and Conditions (§10.2). STM32's TIM triggers SPI's DMA send using NSS when MSSI is usedUsing stm32h743, timer TIM12 enable event, spi1 enable NSS, set MSSI to 15 to enable cyclic sending of DMA for SPI and select TRGO of TIM12 as trigger source. STM32的TIM触发SPI的DMA发送使用NSS时MSSI的问题使用stm32h743,定时器TIM12使能事件，spi1使能NSS，将MSSI设置为15，使能SPI的DMA的循环发送，并将触发源选择TIM12的TRGO。 The MSSI has an effect when only the first data sent is delayed during the phenomenon, and none of the later ones have an effect.现象时只有第一个发送的数据会有延时，MSSI有效果，后面的都没有效果。  

Hi, I am using an STM32H523 MCU where I transmit some data via SPI (master tx only) in blocking mode.In debug build the SPI behaves as it should be and everything is fine.In release build the SPI CLK line remains high for too long, after the last bit of a transmission has been sent.This results in the (software) CS line going high before the CLK returned to 0 (the DAC7562 slave does not like that)How it looks like in Release:How it looks like in Debug (correct):My code for the transmits: HAL_GPIO_WritePin(GPIOA, CS_Pin, GPIO_PIN_RESET); hal_status = HAL_SPI_Transmit(spi_handle_, data, sizeof(data), HAL_MAX_DELAY); HAL_GPIO_WritePin(GPIOA, CS_Pin, GPIO_PIN_SET); CubeMX config code:void MX_SPI1_Init(void) { hspi1.Instance = SPI1; hspi1.Init.Mode = SPI_MODE_MASTER; hspi1.Init.Direction = SPI_DIRECTION_2LINES_TXONLY; hspi1.Init.DataSize = SPI_DATASIZE_8BIT; hspi1.Init.CLKPolarity = SPI_POLARITY_LOW; hspi1.Init.CLKPhase = SPI_PHASE_1EDGE; hspi1.Init.NSS = SPI_NSS_SOFT; h

I'm using STM32H750Is it possible to read and write like EEPROM in a specific part of the program (the last part of the internal flash area?)?I think it's impossible because there's only one sectorIf possible, I would appreciate it if you could give me an example

tried to set up a USB device serial emulation (CDC) for STM32H563. Started a Free RTOS based project project in STM32CubeMX. But there I only can activate USB as "device_only in the "connectivity" segment but do not find any other USB related settings. I did that previously with the stm32F series and there it was in STmCube, no prob.The generated code also seems not to have the USBD_DESC_Private_Defines or similar things needed. Is it somewhere hidden under another name in STM32Cube? Or does STM32Cube does not support it? Or is this  CPU issue? Or do I need to somehow get me drivers from other places and when yes, from where?  

Hello,I have an application that shows image from camera from time to time on the screen. This app flashed at 0x7010'0000 and works well when I run FSBL in dev mode from debugger.But if I flash this FSBL at 0x7000'0000 and switch to flash boot app works in general (according to uart output and ethernet activity) but screen flickers.Sometimes correct image appears for very short time.What can cause the problem?(FSBL is almost unmodified Projects/STM32N6570-DK/Templates/Template_FSBL_XIP)

The X-CUBE-LED1642 software seems to have gone missing. There are no links on the web page where you can download it.Should be here: https://www.st.com/content/st_com/en/products/embedded-software/mcus-embedded-software/stm32-embedded-software/stm32cube-expansion-packages/x-cube-led1642.html Found this old thread with the same issue, apparently it's been un-fixed: https://community.st.com/t5/stm32-mcus-products/get-the-x-cube-led1642-driver/m-p/372192

Hi,I created the STM32H743 project based on RT Thread and LWIP, only open ICache, if I modify the content of a function, it will lead to the Ethernet transmission success, but there is no data on the MII interface, debugging compared the ETH register under normal communication and the ETH register under abnormal condition. The configuration is the same; Dynamically allocated memory is placed on 0x24000000, and Ethernet descriptors and received data are placed on 0x30040000.In the above case, through multiple tests, it was found that increasing the size of the function block can restore the sending of ETH to normal, such as adding multiple __nop instructions.Why this is the case, and what to look out for if you want to open only ICahe or DCache.static err_t low_level_output(struct netif *netif, struct pbuf *p) { uint32_t i=0; struct pbuf *q; err_t errval = ERR_OK; static ETH_BufferTypeDef Txbuffer[ETH_TX_DESC_CNT]; memset(Txbuffer, 0 , ETH_TX_DESC_CNT*sizeof(ETH_BufferTypeDef));

Any update on when the middleware will be extended to support EPR? The availability of TCPPE or devkits is not really all that important for a software update and probably should not be gating. Should I switch to the HUSB238A instead of the STM32G0?

Hi I configured spdif rx with dma in circular mode and it works fine except that the signal should persist when mcu starts. The "wait for activity before synchronization" has no effect. The code for spdif mostly generated by cubeIDE. Am i missing something or it will not work in combination with circular dma? Also in case if cable was disconnected and connected back, what is the right procedure to restart reception? My attempts only lead to mcu stuck.

Hello STM32 Community,I'm developing a cellular IoT device using STM32L4 and facing an architectural challenge regarding IWDG implementation with long cellular communication timeouts. I'd appreciate your expertise and recommendations.System Overview:Hardware: STM32L4 custom board with cellular modem (Quectel BG95/BG96)Communication: UART-based AT commands with IDLE line interrupt (no DMA)Application: Periodic sensor data transmission to server via UDPPower Management: Device enters STOP2 mode between measurement cyclesIWDG Configuration:Clock Source: LSI (32kHz)Timeout: ~32.8 seconds maximum (IWDG_PRESCALER_256, Reload=4095)Behavior: Once enabled, cannot be disabled; pauses during STOP modesThe Challenge: My low-level AT command function implements timeout-based communication to prevent infinite loops:int <function_name>(const char *command, const char *expected_response, /* other params */, int timeout_ms) { uint32_t start_time = HAL_GetTick(); // Send AT command via UART