STM32 MCUs Embedded software

Hi, I would like to develop an application using ADC + TIMER + DMA. My base code doesn’t work, and I don’t understand why. To debug, I introduce the variable "toto". This value of this variable doesn't change. I use STM32CubeIDEv1.19.Best regardsThomas- H

Originally a comment on the "Using CAN (bxCAN) in Normal mode with STM32 microcontrollers (Part 2)" Knowledge Base article.Moved to the forum for better visibility & discussion.Hi,I just using STM32CubeIDE for 2 or 3 days. I am doing a test with a Nucleo-L476RG and CAN bus. With you help, your sample, I make my board talking with other board of mine.Just a question, maybe a *** one, where can I gather informations about CAN_TxHeaderTypeDef, uint32_t RTR  or uint32_t IDE... and so mutch other symbols? Is there a documentation about?Best Regards,Maurice.

Hi team, I am working with the STM32H7S78-DK board and implementing TLS 1.3 using WolfSSL on the client side. Project setup: Board: STM32H7S78-DK TLS library: WolfSSL (TLS 1.3 enabled) Network: TCP client socket Server: OpenSSL TLS 1.3 server Certificates: Public and private keys generated and configured issue: I am able to create the TCP client socket successfully, but when I attempt to establish a secure TLS connection with the OpenSSL server, the handshake fails. Handshake error: -308 1)What does the WolfSSL handshake error -308 indicate during a TLS 1.3 connection? 2)What are the possible causes of this error when communicating with an OpenSSL TLS 1.3 server? Any suggestions, references, or troubleshooting steps to resolve this issue would be very helpful. Thank you for your support. thanks & regards, Karthik.

Hello, I am making a new project by importing the .ioc file of example code "Ux_Device_CDC_ACM" of STM32U5G-DK2. All the .c files of USB_stack and Azure_RTOS are also copied from the example project. Both, example project and My project, look same. My project builds also successfully. But no COM/ACM port is being formed after loading the project to STM32U5G-DK1 whereas, COMM port is being formed with Example project.  What can be the reason ? Please help. NOTE: USB Device mode Example project in repository is provided for STM32U5G-DK2 and not for DK1. So. we are trying to make a USB Device code by referring to this DK2 example.   With regard, Sudarshan Chaudhary

I generated project with CubeIDE for Nucleo F411RE board with defaults.Now I want to create my own function void LED_blink(int blink_num);So, I created ledfunc.h and ledfunc.c files.This is my ledfunc.h file: #ifndef INC_LEDFUNC_H_ #define INC_LEDFUNC_H_ void LED_blink(int led_number_blink); #endif /* INC_LEDFUNC_H_ */and this if my ledfunc.c file: void LED_blink(int led_number_blink) { for (int i = 0; i < led_number_blink; i++) { HAL_GPIO_WritePin(LD2_GPIO_Port, LD2_Pin, GPIO_PIN_SET); HAL_Delay(100); HAL_GPIO_WritePin(LD2_GPIO_Port, LD2_Pin, GPIO_PIN_RESET); HAL_Delay(100); } }and I want to use LED_blink(2) function in main.c( which was generated by CubeIDE )When I try to build code, I'm getting errors LD2_GPIO_Port undefinedYes, those defined in main.hWhere (in which file ) I need to include #include "main.h" ?I need proper way where to add #includeEdited to apply source code formatting - please see How to insert source code for future reference.

Hi!I have the following code:uint32_t currentTicks; do { currentTicks = handle->controlData.ticks; // controlData.ticks is volatile // copy a lot of data from handle->controlData ... } while(currentTicks != handle->controlData.ticks);handle->controlData.ticks (and the other data fields) are regularly updated, triggered by an interrupt, which could happen during copying of this data. The idea is that if the while check is false, just copy all the data again, since during the previous copying of said data new data must have arrived and the copied data would therefore be inconsistent.We are running on an STM32H7 and the data is in DTCMRAMFor this to work, is a Memory barrier instruction required or could there be any other pitfalls?

My hardware design has finalized STM32H563 MCU (from ST Microelectronics) to interface 5-port managed Ethernet Switch (KSZ8795 from Microchip). I'm tried to use orix board library code but unable to make it run.I have following questions,1. Is KSZ8795 intended to work with Microcontrollers as opposed to microprocessor which used Linux/Windows as a de-facto OS.2. Is KSZ8795 compatible with STM32H563 MCU?3. Is KSZ8795 driver port available for FreeRTOS?

Hello,I am trying to get the audio data from ADF1. Therefore I use the GPDMA as shown in this example: https://github.com/STMicroelectronics/STM32CubeU5/tree/main/Projects/STM32U575I-EV/Examples/MDF/ADF_AudioRecorder. I am developing on a B-U585I-IOT02A.My problem is, that I seem to receive only 0x7FFF. I am not sure I do not receive valid or realistic values. Unlike in the example I want to put the received data in a TX_Queue later and handle them in another task.Please find my code attached below. I would be very grateful for hints and suggestions.Thank You!K.S. MDF_HandleTypeDef AdfHandle0; MDF_FilterConfigTypeDef AdfFilterConfig0; DMA_HandleTypeDef handle_GPDMA1_Channel10; MDF_DmaConfigTypeDef DMAConfig; int16_t RecBuff[REC_BUFF_SIZE * 2U]; volatile uint32_t DmaRecHalfBuffCplt = 0; volatile uint32_t DmaRecBuffCplt = 0; extern DMA_QListTypeDef ADFQueue; void SystemClock_Config(void); static void SystemPower_Config(void); static void MX_GPIO_Init(void); static void MX_G

Hi,STM32G484 is running well with FreeRTOS.The only thing left is to transfer the USB communication into the RTOS-task.Is it possible to redirect the function pointer, which is used now, to another function?Greetings,ErX

Hello,I am using an STM32H743 microcontroller. UART8 is configured at a baud rate of 460800 with DMA enabled. The UART output is logged by a USB logger which creates a FAT32 text file.The transmitted data contains mixed data types such as integers, characters, strings, floats, and doubles. To combine the data, I format it into a string using snprintf.I am facing a strange issue:When I format the string using a comma after the first integer, and the second integer variable is zero, the value recorded in the USB log becomes 8 instead of 0.When I replace the comma with a semicolon, the value is recorded correctly as 0.Additional observations:This issue only occurs when the data is generated by the STM32.If the same formatted data is sent from a computer or another hardware source, the issue does not occur.If I log the STM32 UART output directly on a computer terminal, the data is correct.The problem only appears when using the USB logger with STM32 UART DMA output.Could you please advise

I have a bunch of following warnings:c:/programs/ARMtools/EmbeddedBSPs/arm-eabi/com.sysprogs.arm.stm32/STM32F1xxxx/STM32F1xx_HAL_Driver/Inc/stm32f1xx_ll_gpio.h: In function 'void LL_GPIO_SetPinMode(GPIO_TypeDef*, uint32_t, uint32_t)': c:/programs/ARMtools/EmbeddedBSPs/arm-eabi/com.sysprogs.arm.stm32/STM32F1xxxx/STM32F1xx_HAL_Driver/Inc/stm32f1xx_ll_gpio.h:343:22: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister] 343 | register uint32_t *pReg = (uint32_t *)((uint32_t)((uint32_t)(&GPIOx->CRL) + (Pin >> 24))); |in several LL headers.Can this please be fixed in some suitable way? One way to do that might be to replace the 'register' specifier by a macro, which would be defined based on the __cplusplus  standard preprocessor macro and its value. A simple version would be to add#if __cplusplus >= 201703L #define register #endifto each header where this occurs, but I am not a C++/build-environment specialist so don't know whether thi

Hello everyone,I am using SPI2 of STM32F103RCT6 to communicate with an AT45DB641E DataFlash device. I am trying to understand why the effective SPI data rate is significantly lower than what I expect based on the configured SPI clock.Hardware setupMCU: STM32F103RCT6 (Cortex-M3)SPI instance: SPI2SPI clock: 9 MHzData frame: 8 bitsSPI mode: 2-line unidirectional (full-duplex hardware)NSS: Software-controlled GPIOCore clock: 72 MHzCustom PCB (STM32 + AT45 connected directly)Schematics attachedTest descriptionI am reading the status register of the AT45DB641E.Once the read command is sent and SS is held low, the flash continuously outputs two status bytes as long as clock pulses are provided.I measured the execution time of HAL_SPI_TransmitReceive() by placing timestamps before and after the function call, using the DWT cycle counter (DWT->CYCCNT) available on the Cortex-M3.Here is the code used for testing, the tx and rx buffer are globally defined of size 5000 and datatype uint8_t: /*

I would like to use the single USB internal PHY on the STM32H735 to connect to a 2 port hub chip (like the Microchip USB2422) so that I can connect to both a USB stick for firmware upgrades as well as a cellular module.  I started connecting everything up and then I came across a multiple sources saying that you can't connect USB Hubs to the internal PHY and you have to use the ULPI interface to connect to an external PHY, but none of the sources really explain why other than saying the internal PHY isn't capable of High Speed operation, and the USB software from ST doesn't allow for hubs.  I don't understand what this has to do with interfacing with a hub IC when I'm perfectly fine with operating at Full Speed.  So I have a few quesitons:1) Can I use a USB Hub (like the USB2422) as long as I'm OK with it operating at Full Speed only?  Is it technically possible to connect these devices and get them to work?2) Will the USB Host middleware provided through STM32CubeM

Hi, I got stuck in the HardFault_Handler every time after editing some code. I'm using FreeRTOS in c++ combination with classes. First I thought this would be a memory issue. After increasing configTOTAL_HEAP_SIZE and configMINIMAL_STACK_SIZE, I was still stuck in the HardFault_Handler. Even by jumping into a function, before I returned from this function the HardFault_Handler was tripped again. I really tried a number of things... I made a function (bool Controller::DefaultConfig()) to set the default configuration when nothing was available in the flash and I forgot the return true or false. When adding the return with a result, the problem with HardFault was solved.   Is this a logical behavior? (A compiler error would make more sense) Greetings, ErX

Hi there !I use thi function and work perfectly . But if i try to read the HAL_StatusTypeDef   i don't understand why return HAL_OK even if i wrote a wrong address why ???? if i use void HAL_I2C_ErrorCallback(I2C_HandleTypeDef *hi2c)    this work with i wrote a wrong address please some one can tell me why ? Thank you Sergio

Hi, I am compiling the STM32U0 HAL library and I get errors like this one:/Users/kiwanda/techniek/swexternals/STM32/HAL/Libraries/STM32U0xx_HAL_Driver/Inc/stm32u0xx_ll_comp.h: In function 'uint32_t LL_COMP_GetCommonWindowMode(const COMP_Common_TypeDef*)': /Users/kiwanda/techniek/swexternals/STM32/HAL/Libraries/STM32U0xx_HAL_Driver/Inc/stm32u0xx_ll_comp.h:391:27: error: ISO C++17 does not allow 'register' storage class specifier [-Werror=register] 391 | register const uint32_t window_mode_comp_odd = (uint32_t)READ_BIT(COMPxy_COMMON->CSR_ODD, COMP_CSR_WINMODE);I am using a C++ compiler and since C++14 the keyword register has been declared obsolete and useless. I fully agree with this step, all the more since we are writing SW here on ARM Cortex:When writing software for ARM Cortex, which is a Load/Store architecture RISC processor, EVERYTHING goes through a register. The register keyword is therefore completely meaningless, useless and superfluous in this context.I would l

Hello everyone, I’m looking for some help getting an Ethernet TCP server running using LwIP with FreeRTOS on an STM32. Current status: Hardware: NUCLEO-H723ZG Stack: LwIP + FreeRTOS Development Environment: STM32CubeMX and STM32CubeIDE TCP client/monitor: Hercules v3.2.8 I can ping the board successfully every time (with Windows terminal and Hercules) However, I cannot establish a TCP connection when FreeRTOS is enabled What’s confusing me is that: If I disable FreeRTOS, I can successfully establish a TCP connection using the CubeMX example LwIP_TCP_Echo_Server Once FreeRTOS is enabled, the TCP connection attempt from Hercules fails (no connection established) What I’ve tried so far: Multiple CubeMX LwIP + FreeRTOS example configurations Both Netconn and Socket-style APIs Adjusting task priorities and stack sizes Verifying IP address, subnet, gateway, and port settings Confirmed Ethernet link is up and LwIP responds to ping At this point, it feels like I’m

I have designed a custom board based on the STM32F767ZI MCU. To enable Ethernet connectivity, I integrated the KSZ8081RND PHY, along with the necessary magnetics and an RJ45 connector. You can find the full schematics in the attached PDF.On the hardware side, everything appears to be functional. I can confirm the presence of the 50MHz clock signal feeding both the PHY and the MAC. I have trace-matched the signals to this clock, and the MDI signals also look correct (including route matching). I can observe the TX_EN line going high (3.3V) during activity, as well as movement on the other lines. Just to clarify, I am using the RMII interface.The MDIO and MDC signals seem fine, as I am able to successfully read the PHY registers. For instance, reading register 0x02 on the KSZ8081RND correctly returns the ID 0x0022. I also see activity blinking on the RJ45 LED.During debugging, it seems I can receive ping requests on the board; I can inspect the memory and see my Host's MAC address and th

Hi, HAL_LIN_SendBreak seems to be blocking CPU, is there a way to bring UART TX pin down then wait for timer and bring it up? I have done it making GPIO pin GPIO_MODE_OUTPUT_PP then back to GPIO_MODE_AF_PP but init after takes long time. I was wondering is it possible to do it within UART without changing pin mode? Or reducing the time pin mode init is required? void LIN_SendFrame_IT(void) { __HAL_UART_DISABLE(&huart2); GPIO_InitTypeDef g = {0}; g.Pin = LIN_TX_Pin; g.Mode = GPIO_MODE_OUTPUT_PP; g.Speed = GPIO_SPEED_FREQ_HIGH; HAL_GPIO_Init(LIN_TX_GPIO_Port, &g); HAL_GPIO_WritePin(LIN_TX_GPIO_Port, LIN_TX_Pin, GPIO_PIN_RESET); TIM2->ARR = 900; // 900us break TIM2->CNT = 0; TIM2->CR1 |= TIM_CR1_OPM; HAL_TIM_Base_Start_IT(&htim2); } void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim) { if (htim != &htim2) return; HAL_GPIO_WritePin(LIN_TX_GPIO_Port, LIN_TX_Pin, GPIO_PIN_SET); GPIO_InitTypeDef g = {0}; g.Pin = LIN_TX_

This thread is the follow-up to this thread Hi, is clear that uart pins are connected , the counter of received bytes is a real value. I try this one: 1. Stop RTOEN interrupt 2. And get interrupt from DMA when buffer is HALF and FULL : and I have data in DMA buffer: huart2.Instance->RTOR = 100; // __HAL_UART_ENABLE_IT(&huart2, UART_IT_RTO); // huart2.Instance->CR2 |= USART_CR2_RTOEN; HAL_NVIC_SetPriority(USART2_IRQn, 0, 0); HAL_NVIC_EnableIRQ(USART2_IRQn);  this is in : static void MX_USART2_UART_Init(void) and : void DMA1_Stream0_IRQHandler(void) { /* USER CODE BEGIN DMA1_Stream0_IRQn 0 */ HAL_UART_Transmit( &huart1, dma_buf ,DMA_BUFFER_SIZE , HAL_MAX_DELAY); /* USER CODE END DMA1_Stream0_IRQn 0 */ HAL_DMA_IRQHandler(&hdma_usart2_rx); /* USER CODE BEGIN DMA1_Stream0_IRQn 1 */ HAL_UART_Receive_DMA(&huart2, dma_buf, DMA_BUFFER_SIZE); /* USER CODE END DMA1_Stream0_IRQn 1 */ } this is on DMA interrupt. Then we have data:    

Hi everyone! I'm using an Arduino Portenta H7 (STM32H747) board mounted on a custom carrier board. I'm using STM32CubeIDE as a development environment, with HAL libraries for peripheral initialization.I'm only using the Portenta's M7 core. Portenta interfaces via GPIO to a parallel bus that drives both a display and other peripherals. I'm also using the RTC module for the system clock only, initialized at startup via HAL. Everything works fine until I try to set the RTC datetime using this function: void tm_wr(struct tm *_tm) { RTC_DateTypeDef sDate; RTC_TimeTypeDef sTime; if (_tm->tm_wday == 0) { sDate.WeekDay = 7; } else { sDate.WeekDay = _tm->tm_wday; } sDate.Month = (uint8_t)_tm->tm_mon + 1; sDate.Date = (uint8_t)_tm->tm_mday; sDate.Year = (uint16_t)(_tm->tm_year-100); HAL_RTC_SetDate(&hrtc, &sDate, RTC_FORMAT_BIN); sTime.Hours = (uint8_t)_tm->tm_hour; sTime.Minutes = (uint8_t)_tm->tm_min; sTime.Seconds = (uint8_t)_tm->tm_sec; HAL_RTC_SetTime(&amp

So here is the outline of my code. I'm getting data every 5 seconds (example data: "vref:2975.12, voltage_max:30.00, voltage_min:-1219.00,avg_error: 4136.04") via UART and i transmit it again to view it in putty via ST Link (USART3). Problem is some of the data is getting corrupted, i'm attaching the Putty terminal output. I have verified the input, using logic analyzer and it's correct.Here is the code, can you help me identify what i might be doing wrong/* USER CODE BEGIN Header */ /** ****************************************************************************** * @file : main.c * @brief : Main program body ****************************************************************************** * @attention * * Copyright (c) 2026 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. * **

Hello,I am currently working on a project with an HTTP server, successfully implemented using FreeRTOS. In this setup, I handle client requests for opening and collecting data from the client side. However, since I need to display real-time data on a web page (for an IoT application), it has become necessary to implement the WebSocket protocol.I am looking to implement a WebSocket server on my STM32f746G-DISCO. Unfortunately, I have not been able to find any working examples of WebSocket implementation on STM32.Could you kindly point me in the direction of any relevant examples or provide some guidance on how to get started with this? Also, I would appreciate any insights regarding whether I need to modify my CubeMX configuration when implementing WebSocket, or if the standard initialization is sufficient — enabling ETH, activating lwIP (httpd) without DHCP, and activating FreeRTOS with the default task where the following initialization is done:MX_LWIP_Init();http_server_init();Any he

Hi,I have implemented CDC USB device on my custom board using STM32C071CBT6. When i connect USB cable to host PC then I can see Virtual COM Port on PC as 'USB Serial Device (COMxx)' However, I tried transmitting some data which I could not receive on PC side. After debugging I noticed that function USBD_CDC_ACM_Activate() is never getting called. In file, app_usbx_device.c, function MX_USBX_Device_Init() has following code:UINT MX_USBX_Device_Init(VOID){UINT ret = UX_SUCCESS;UCHAR *device_framework_high_speed;UCHAR *device_framework_full_speed;ULONG device_framework_hs_length;ULONG device_framework_fs_length;ULONG string_framework_length;ULONG language_id_framework_length;UCHAR *string_framework;UCHAR *language_id_framework; UCHAR *pointer; /* USER CODE BEGIN MX_USBX_Device_Init0 */ /* USER CODE END MX_USBX_Device_Init0 */pointer = ux_device_byte_pool_buffer; /* Initialize USBX Memory */if (ux_system_initialize(pointer, USBX_DEVICE_MEMORY_STACK_SIZE,

I've seen that, trying to download the STM32CubeH7RS Firmware Package from CubeMX, I'm seeing the latest version is 1.3.0.On the actual documentation and GitHub repository https://github.com/STMicroelectronics/stm32h7rsxx-hal-driver I'm seeing that the version is 1.2.1Dates are the same, so I think the version is the same, just with different numbering; is it correct?