STM32 MCUs Products

I’ve written code that performs a CAN Tx transmission when an interrupt occurs while in STOP2 mode.The transmission request via HAL_FDCAN_AddMessageToTxFifoQ() succeeds,but the HAL_FDCAN_TxEventFifoCallback(FDCAN_HandleTypeDef *hfdcan, uint32_t TxEventFifoITs) callback is never triggered.The GPIO interrupt callback (HAL_GPIO_EXTI_Rising_Callback) works as expected,and I can see "HAL_CAN_AddTxMessage start" being printed, which means the transmission request was made.However, it seems like the transmission is not actually completed.Why is the Tx event not being triggered? /* USER CODE BEGIN Header */ /** ****************************************************************************** * @file : main.c * @brief : Main program body ****************************************************************************** * @attention * * Copyright (c) 2025 STMicroelectronics. * All rights reserved. * * Thi

Hi! I have the following code for an ADC1 driver running in ADC1_IN1 (PC0) in an L476RGT6 and it runs fine. However, I am testing it by reading a potentiometer and the value read is constant. I've already double-checked everything, including channel selection in ADCx_SQR1, but I am still not sure why it is not reading correctly when I change the potentiometer resistance.You can assume systick_us_delay() works fine.

(Moved to appropriate forum from 'Feedback')   Hi, I'm using Nuleo-H743Zi2 hardware. I have configured FDCAN1 with below configurations, hfdcan1.Instance = FDCAN1; hfdcan1.Init.FrameFormat = FDCAN_FRAME_FD_BRS; hfdcan1.Init.Mode = FDCAN_MODE_NORMAL; hfdcan1.Init.AutoRetransmission = ENABLE; hfdcan1.Init.TransmitPause = DISABLE; hfdcan1.Init.ProtocolException = ENABLE; hfdcan1.Init.NominalPrescaler = prescaler; hfdcan1.Init.NominalSyncJumpWidth = 1; hfdcan1.Init.NominalTimeSeg1 = 13; hfdcan1.Init.NominalTimeSeg2 = 2; hfdcan1.Init.DataPrescaler = 1; hfdcan1.Init.DataSyncJumpWidth = 1; hfdcan1.Init.DataTimeSeg1 = 1; hfdcan1.Init.DataTimeSeg2 = 1; hfdcan1.Init.MessageRAMOffset = 0; hfdcan1.Init.StdFiltersNbr = 0; hfdcan1.Init.ExtFiltersNbr = 0; hfdcan1.Init.RxFifo0ElmtsNbr = 8; hfdcan1.Init.RxFifo0ElmtSize = FDCAN_DATA_BYTES_8; hfdcan1.Init.RxFi

I have an STM32F429ZI Nucleo board (for SPI master and UART to check everything's working alright) and an EVB-LAN9252-SPI board(for SPI slave).I have to check if the SPI is correctly working, but it seems that I can't debug or check on the slave's side.Shown below is the test code I worked on the STM32F429ZI Nucleo board to check if the SPI is working correctly. SPI1 and SPI4 is configured in one board. while (k < 32) { HAL_UART_Transmit(&huart4, &SPI1_Buffer_Tx[k], 1, 100); k++; } k = 0;   while (k < 32) { HAL_GPIO_WritePin(GPIOE, GPIO_PIN_9, GPIO_PIN_RESET); // this GPIO is connected to hardware NSS HAL_SPI_Transmit(&hspi1, &SPI1_Buffer_Tx[k], 1, 100); HAL_SPI_Receive(&hspi4, &SPI4_Buffer_Rx[k], 1, 100); HAL_GPIO_WritePin(GPIOE, GPIO_PIN_9, GPIO_PIN_SET); k++; } k = 0;   while (k < 32) { HAL_UART_Transmit(&huart4, &

Hi everyone,I need your advice because I think the delays I'm getting are incorrect, but I'm not sure.In my tests, I transmitted data like this via USB (COM port) a total of 34 times:BODY1=00 BODY2=00 BODY3=00 SW=9000I'm sending data in Python via USB. The STM32H755 interprets it and returns the frame shown above.I've measured the time, and it takes 5.1 seconds to receive my 34 data points (with 34 responses). Of the 5.1 seconds, I spend 5.04 seconds in this function:uint8_t CDC_Transmit_FS(uint8_t* Buf, uint16_t Len)This isn't normal, but I don't know how to improve this transmission time. I'm not experiencing any data loss, it's just extremely slow.Here's how I send my data:snprintf(data, sizeof(data), "%sSW=%04X\r\n", body_str, apdu_res.SW); CDC_Transmit_FS((uint8_t *)data,

Hii everyone,                  1. I want to interface OV10635 camera module with stm32h743 controller  does it is suitable ? .                  2. If anyone have OV10635 configuration files please share with me.  

HelloCan anybody explain how it is possible to power VCORE directly from SMPS output? I see that SMPS have only two possible output voltages, 1.8V and 2.5V:But VCORE accepts absolute maximum of 1.4V.

Hi STM32 Community,I recently created a detailed video tutorial showing how to implement I2C communication between two STM32F446RE boards using STM32CubeIDE.The project covers:- STM32CubeMX configuration- I2C wiring setup (PB9/PB8)- Master transmit code using HAL- Slave receive Watch the full tutorial here::backhand_index_pointing_right: [STM32 I2C Communication Tutorial | Master-Slave Interface Between Two Boards with STM32CubeIDEhttps://youtu.be/ibNJuGFzjoY]Hope it helps others working on STM32-based communication projects. Feedback or questions are welcome!Best regards,Topviewtech

Hi Team,I am working on a project using the STM32H745 microcontroller, and I need to sample a 500 kHz sine wave using the ADC. I have configured the ADC with the following settings:ADC clock: 77MHzResolution: 16 bitsSampling time: 1.5 ADC clock cyclesContinuous conversion mode with DMA enabled(32bit)Sampling Frequency Timmer : 1MHzHowever, I would like to confirm:Is it feasible to reliably sample a 500 kHz sine wave with the STM32H745 ADC?Are there any specific considerations or limitations I should be aware of when sampling high-frequency signals like this? Best Regards,Gagan Gowda

I am confused.On an STM32G474QE, I intend to use PD3 for TIM2_CH1. I'm running out of pins, so this is the only practical pin for me to use.However, according to the datasheet (DS12288 Rev 6), this pin can be either TIM2_CH1 or TIM2_ETR when alternate function 2 is selected. It is mentioned in the pinout list, as well as the alternate functions table:

Dear All,Can I select TRGO2 for my ITR selection?The table below is extracted from the STM32H563 Reference Manual (RM).Does it mean that ITR does not support TRGO2?

Hi!I'm new to this sort of EEPROM emulation that I'm trying to set up and had a few basic (read: dumb) questions:Why does the high cycle flash not need to be separated in the linker unlike what I would do when using normal flash?Which EDATA do I use if I'm not utilizing bank switching?In my codebase, I only see FLASH_EDATA_SIZE instead of a 1 or 2, is this expected?Is there any sample code I could look at to get the flash set up with proper emulation. I could write a bunch of the functions myself but some boilerplate would be nice to have.Any general steps you followed if anyone has this running would be great tooI've been researching this all day and would appreciate any help, thanks!Mahir

Hi everyone,I’m working with the STM32C011D6 in the SO8N package, and I’m a bit confused by the pinout and remapping notations in the datasheet.In the alternate function table, PA11 [PA9] and PA12 [PA10] are shown for pins 5 and 6 respectively. From what I understand, this suggests that PA11 and PA12 might internally perform the functions of PA9 and PA10 in packages where PA9 and PA10 are not present.In fact, the datasheet itself notes that no package implements PA9 and PA10, which further leads me to assume that PA11 and PA12 are intended to handle those alternate functions (like I2C1_SCL and I2C1_SDA) in reduced pin-count packages like SO8N.However, I’m running into some uncertainty:Do pins 5 and 6 of the SO8N package actually support I2C1 (SCL/SDA) functionali

Hello, I am seeking guidance on how to interface and access a Radxa eMMC Module, which operates on the eMMC 5.1 specification, with either the STM32H750B-DK development kit or the WeAct Studio STM32H750VBT6 development board. I also have a Radxa eMMC to uSD converter, which allows the eMMC module to interface via a microSD card slot. Any suggestions or step-by-step guidance would be greatly appreciated, as I aim to integrate this storage solution into my project.    

I've had a look at similar threads, however they have been set to read only.I have ADC1 and ADC2 setup in regular simultaneous mode with DMA transfer enabled. Only ADC1 is converting and the data register which contains ADC2 data is empty (0x000). I have stepped through my code with the debugger and seen that the EXTTRIG bit for ADC2 is not being enabled.The reference manual explains that EXTTRIG should be set in the control register for both ADCs in dual mode.The following HAL function should be setting that bit, however, it remains 0.HAL_ADCEx_MultiModeStart_DMA(&hadc1, adc, 2);I have tried to manually set this bit in the register but still no conversion is being triggered on ADC2 ADC2 -> CR2 |=(1U<<20); If there's something I am missing, any advice would be appreciated.Note: the ADCs have the same samp

Hi, I am working on STM32H757I-EVAL. I am new to STM32 boards. I am using STM32 Cube IDE version 1.18.0. I started with the basic task - blinking led. I have written the code but it is not reflecting on the board. I have configured this task for four LEDs, I have set PK3, PK4, PK5, PK6 as GPIO Output. In pinout and configuration under system core, I have selected GPIO and configured every pins. Pin context assignment - ARM Cortex M7, GPIO Output level - Low, GPIO mode - output push and pull, GPIO Pull up / pull down - No pull up and no pull down, Max output speed - low. In RCC mode and configuration, HSE, LSE - Crystal/ ceramic resonator I have attached image of clock configuration.Code: in while (1) block  // Turn on PK3, turn off others HAL_GPIO_WritePin(GPIOK, GPIO_PIN_3, GPIO_PIN_SET); HAL_GPIO_WritePin(GPIOK, GPIO_PIN_4, GPIO_PIN_RESET); HAL_GPIO_WritePin(GPIOK,

Hi at everyone, I need to write a code without the Cube IDE configurator, due to save program memory. I tryed to configure the USAR1, but seem not output on the pin the data streem. Seem that the machine runs because, at the first, I tryed to transmit in polling mode cheching the TXE flag to charge the the TDR register, but not data goes to the pin, but rather, the TX pin seem on high impedence. I forgot something. Below the USART init : RCC_CCIPR &= 0xfffffffc; //USART1 clock on system clock RCC_APBENR2 |= 0x00004000; //USART1 clock enable RCC_IOPENR |= 0x00000005; //GPIOC clock enable PORTC_MODER &= 0xefffffff; //set PC14 as alternate function PORTC_AFRH &= 0xf0ffffff; //set PC14 as TxD function PORTC_OTYPER &= 0xffffbfff; //PC14 PP mode USART1_CR1 |= 0x00000001; //USART1 enabled USART1_CR1 &= 0xefffefff; //8 bit data length USART1_CR3 = 0x00002000; //DMA disable USART1_BRR = 0x0

/* OCTOSPI1 init function */ void MX_OCTOSPI1_Init(void) { /* USER CODE BEGIN OCTOSPI1_Init 0 */ /* USER CODE END OCTOSPI1_Init 0 */ OSPIM_CfgTypeDef sOspiManagerCfg = {0}; HAL_OSPI_DLYB_CfgTypeDef HAL_OSPI_DLYB_Cfg_Struct = {0}; /* USER CODE BEGIN OCTOSPI1_Init 1 */ /* USER CODE END OCTOSPI1_Init 1 */ hospi1.Instance = OCTOSPI1; hospi1.Init.FifoThreshold = 1; hospi1.Init.DualQuad = HAL_OSPI_DUALQUAD_DISABLE; hospi1.Init.MemoryType = HAL_OSPI_MEMTYPE_MICRON; hospi1.Init.DeviceSize = 32; hospi1.Init.ChipSelectHighTime = 1; hospi1.Init.FreeRunningClock = HAL_OSPI_FREERUNCLK_DISABLE; hospi1.Init.ClockMode = HAL_OSPI_CLOCK_MODE_0; hospi1.Init.WrapSize = HAL_OSPI_WRAP_NOT_SUPPORTED; hospi1.Init.ClockPrescaler = 4; hospi1.Init.SampleShifting = HAL_OSPI_SAMPLE_SHIFTING_NONE; hospi1.Init.DelayHoldQuarterCycle = HAL_OSPI_DHQC_DISABLE; hospi1.Init.ChipSelectBoundary = 0; hospi1.Init.DelayBlockBypass = HAL_OSPI_DELAY_BLOCK_BYP

I am trying to communicate with an external flash chip “MX35LF1G24AD” using QSPI protocol, but I am not able to. Simple test I implemented was to read chip ID to validate I could get data from external flash (I am using OCTOSPI1 interface). From manufacturer datasheet it is mentioned that command should be sent using 1 line on SDIO0. However, when probing communication, data is sent from SDIO3.   Is it possible to send command, on 1 line, on SDIO0 pin instead of SDIO3?

Hi,I'm using STM32F103RB (NUCLEO-F103RB) and I configured the clock system in STM32CubeMX.I am using HSI as the clock source, and the APB2 timer clock is running at 64 MHz.I want to generate 20kHz PWM signals using TIM1 Channel 1, 2, and 3, and I’ve already set all channels to Center-Aligned PWM Mode 2.My requirements are:PWM frequency: 20 kHzResolution: At least 1000 steps (preferably ARR ≥ 999)Timer: TIM1, running at 64 MHz input clockHowever, I’m not sure how to set the correct values for ARR and PSC to achieve exactly 20kHz and also meet the resolution requirement.Questions:What combination of ARR and PSC values should I use to achieve 20kHz PWM with ≥1000 resolution?Is it okay to use PSC = 0 and a higher ARR to get better resolution?Are there any known limitations with HSI or APB2 clock setup that I should be aware of in this context?Thanks in advance for your help!

Hi Support Team,I am using the STM32F103RCT6 MCU in my design, I am facing one issue related to the software reset using "HAL_NVIC_SystemReset();" api is not working and the IDWG also not working after downloading the .hex file using the custom bootloader. However the other code works fine but when the software reset "HAL_NVIC_SystemReset()" is called the MCU hangs and the IWDG also not able to reset the MCU. I have tried the same project downloading through ST-LINK V2 and the code works fine along with  software reset and IWDG.  I am  not able to find the cause of the software reset and IWDG not working after downloading the .hex file using the custom SPI bootloader. I am 100 % sure there is no issue in writing the .hex contents into flash memory using the bootloader. I am using the same process from several months and it is working fine. Only the issue happening after adding software reset and I

According to "STM32H562xx/563xx/573xx device errata" (ES0565 - Rev 6 - March 2025).There is three revisions (Rev.A, Rev.B and Rev.X).What is the difference?All revisions in the market for now?If so, how can we oreder Rev.X chip in the market?We would like to use Rev.X chip.

I am making an adapter between 6‐pin target debug header and 14-pin STDC14 connector. The same cable will be used to program and debug both M0+ and M4 targets.Can I hard-wire SWO (pin 8 ) and T_VCP_TX (pin 14) together? The idea is to have an option on target board to use either UART or SWO, whatever is available.Will UART transmission affect SWD functionality by sending garbage (from SWV standpoint) to SWO pin?update: sorry, posted this into wrong forum. can someone can move this into "dev tools", please?update 2: I think I found an answer here: https://community.st.com/t5/stm32-mcus-boards-and-hardware/uart-signal-on-swo-pin-from-st-link-v2-3/m-p/742773/highlight/true#M22581 

 I am working on interfacing MicroSD card with STM32H757I-EVAL. I am following the same steps to setup and configure SDMMC1, as mentioned in this video https://www.youtube.com/watch?v=-0kFwp0ao6k  @2:56 but there is DMA setting option under SDMMC1 configuration. I am not getting this option to configure. What could be the reason? I have attached the image of IDE environment. 

Hi,I am currently working with the STM32F334 and STM32G474 microcontrollers, and I have a couple of technical questions that require deeper insight into how the HRTIM (High-Resolution Timer) operates in these devices.Q1. Can HRTIM generate a high-resolution variable-frequency waveform?From my own testing, it appears yes, but I would like to confirm this officially. To clarify what I mean: suppose I am designing a resonant converter operating at 1 MHz. In the STM32F334, the HRTIM supports an effective edge resolution of ~217 ps, equivalent to a virtual clock of 4.608 GHz. This means the period register value for 1 MHz would be 4.608GHz/ 1MHz = 4608. Now, if I reduce the period by just one count 4.608GHz / 4607 = 1000217MHz This implies a frequency resolution of ~217 Hz. However, if high-resolution control were not supported for the period register, the period would instead be based on the timer base clock 144&nbsp