STM32 MCUs

The integrated ST-Link debugger/programmer on STMicroelectronics NUCLEO boards is widely appreciated for its ability to output messages to a serial port, enabling easy debugging and communication with host PCs. However, setting up the board to not only send but also receive commands from PC-based applications such as Tera Term requires additional programming effort. This guide will walk you through the steps to implement bidirectional serial communications, allowing your NUCLEO board to interact dynamically with your computer.

Hi, im doing a line follower and using the mcu stm32 f411, its a small development board arduino nano style, and i conected it to the motor driver tb6612fng, and it seems to have backfeed motor suply voltage on the logic pins and it burned my mcu.My question is how to prevent this?

Hi all,I recently designed and built a custom PCB for data acquisition and transmission through bluetooth using an STM32U575 as the main MCU and a BlueNRG-M2SA module for bluetooth data transmission configured as a Network Coprocessor. They are connected via SPI following the pinout on the BlueNRG-M2 datasheet and also looking at the X-NUCLEO-BNRG2A1 schematics. The BlueNRG-M2SA is connected to an external connector via SWD for flashing using an STLink-V3Minie. Resistor R13 is not usually soldered and is just used to enable the bootloader during image flashing. Schematic for the BlueNRG-M2 on the custom PCB provided below:The problem is that I have not been able to achieve communication between the STM32U575 and the BlueNRG-2 module as whenever the main MCU waits for the IRQ signal from the BlueNRG-M2, it doesn't receive any and therefore returns BLE_STATUS_TIMEOUT and gets stuck after aci_hal_set_tx_power_level() during Device_init(). I have tried uploading different DTM ima

Hello, I hope to reach the appropriate contact regarding Country of Origin (CoO) information at ST.We have identified a conflict between the CoO listed on the website and other documents (such as PCN and the attached FMD chemical document). These documents indicate that the CoO for part STM32H523RCT7 is China, while the website lists the CoO as France.Could you please clarify this discrepancy and specify what the France CoO refers to? Based on our documents, the CoO China corresponds to the country of assembly.Your clarification on this matter would be greatly appreciated. Website CoO FRANCE : https://www.st.com/en/microcontrollers-microprocessors/stm32h523rc.html#sample-buy 

Hello Community,I tried with different boards (073, 093, 533, 401) to work with the SPI1 or SPI2.I used the examples, but there is no clock on an SPIx clock pin.e.g.   HAL_SPI_Transmit(&hspi1, SpiData, 2, 100); Has anybody a working STM32Cube porject to load in the STM32CubeIdefor  an SPI only master (no slave no DMA) in the send modus via MOSI pin.Thank youMichael  

Hello everyone!I am currently working on a speaker project that gets audio data from a microsd card over spi and sends it over i2s with DMA.I noticed that the main issue is the latency from the sd card so i got the adivce to use a triple pointer ring buffer.I searched for implementations on triple buffering with i2s but couldn't find a single one.I tried implementing it but it didn't work.(i added the code file to the post)Does anybody have good resources to learn this?

A new STM32 sub-family (as part of the 'H5 family) came out. They have everything but the kitchen sink. As far as I can tell, 'H5E4 and 'H5E5 differ only in that the higher one has USB-HS with PHY (the 'H5Fx are crypto-enabled variants, as usually) What's new is also the PLAY peripheral, which is a small programmable logic element, fully documented and configurable through registers. It's based around 16 simple logic elements (4-input LUT and an optional register), complete with an extensive input multiplexer matrix+filter, interconnected to a variety of peripherals (timers, DMA, ADC...) and also GPIO. I wonder, if there's a Disco around... JW  

After encountering an issue with a Hyperbus flash chip we moved our flash to what we thought would be a simpler OctoSpi Nor Flash. I am working with an STM32H7S7 chip with a NOR Flash S28HS512T. I cannot get the chip to communicate in the desired mode. Here are my steps so far:Configuration code from CubeMX:/* XSPI1 parameter configuration*/ hxspi1.Instance = XSPI1; hxspi1.Init.FifoThresholdByte = 4; hxspi1.Init.MemoryMode = HAL_XSPI_SINGLE_MEM; hxspi1.Init.MemoryType = HAL_XSPI_MEMTYPE_MICRON; hxspi1.Init.MemorySize = HAL_XSPI_SIZE_512MB; hxspi1.Init.ChipSelectHighTimeCycle = 3; hxspi1.Init.FreeRunningClock = HAL_XSPI_FREERUNCLK_DISABLE; hxspi1.Init.ClockMode = HAL_XSPI_CLOCK_MODE_0; hxspi1.Init.WrapSize = HAL_XSPI_WRAP_NOT_SUPPORTED; hxspi1.Init.ClockPrescaler = 3; hxspi1.Init.SampleShifting = HAL_XSPI_SAMPLE_SHIFT_NONE; hxspi1.Init.DelayHoldQuarterCycle = HAL_XSPI_DHQC_ENABLE; hxspi1.Init.ChipSelectBoundary = HAL_XSPI_BONDARYOF_NONE; hxspi1.Init.MaxTran = 0; hxspi1.In

Hello,I want to use the TW9992 NTSC/PAL Video Decoder for STM32N6 to transfer an NTSC camera (720x480 resolution) to the MCU via MIPI-CSI and display it on the screen. I have attached the code below.static void MX_DCMIPP_Init(void) { /* USER CODE BEGIN DCMIPP_Init 0 */ /* USER CODE END DCMIPP_Init 0 */ DCMIPP_CSI_PIPE_ConfTypeDef pCSI_PipeConfig = {0}; DCMIPP_CSI_ConfTypeDef pCSI_Config = {0}; DCMIPP_PipeConfTypeDef pPipeConfig = {0}; /* USER CODE BEGIN DCMIPP_Init 1 */ /* USER CODE END DCMIPP_Init 1 */ hdcmipp.Instance = DCMIPP; if (HAL_DCMIPP_Init(&hdcmipp) != HAL_OK) { Error_Handler(); } /** Pipe 0 Config */ pCSI_PipeConfig.DataTypeMode = DCMIPP_DTMODE_DTIDA; pCSI_PipeConfig.DataTypeIDA = DCMIPP_DT_RGB565; pCSI_PipeConfig.DataTypeIDB = DCMIPP_DT_RGB565; if (HAL_DCMIPP_CSI_PIPE_SetConfig(&hdcmipp, DCMIPP_PIPE0, &pCSI_PipeConfig) != HAL_OK) { Error_Handler(); } pCSI_Config.PHYBitrate = DCMIPP_CSI_PHY_BT_1600; pCSI_Config.DataLaneMapping =

I am currently working on the LoRaWAN_END_NODE example project for a stm32WL . And I want to receive external data via uart and use the LoRaWan process continually, however I am getting problems. The UART is giving invalid data after the sequencer is being initialized.Edit: I have tried the suggestions below, I have put the gps into a task for the sequencer to run. I have also disabled low power mode. I still get invalid data from the UART that I don't receive when the sequencer is not on.Is this a clock issue? Any ideas?

Hi,I created a blank project for STM32U5G9J-DK2 and in process of programming the board, GfxDesigner generates 400MB file intflash.elf. With GfxDesigner 4.24.1 it is 4MB.Why 4.26.1 generates  intflash.elf so large ? A bug ?Thanks  

I have a simple question. Is it possible to use TouchGFX+ThreadX with enabled Ethernet and NETXDuo SNTP client at a same time in STM32N6570-DK board? In other words: take the TouchGFX ClockExample then in CUBEMX enable the Ethernet port with NETXDuo-SNTP server. Will it cause pin conflict? I mean the Ethernet uses the same pins as LTDC. I enabled the Ethernet in ClockExample project and I got blank screen and the app was frozen. After removing Ethernet from the project, the analog and digital clocks appeared again on the display. Thanks, Louis

Good day,I am writing firmware for a custom board using the STM32G0B1KET6 and am experiencing issues related to writing a serial number to the internal flash.As far as I can tell, this MCU has 512 KB of flash split into 2 banks of 128 pages (each page is 2 KB). I am attempting to write to the last page of the first bank (Page 127 @ 0x803F800).I have modified the linker file to reduce the flash area used by my application code like so:MEMORY { RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 144K FLASH (rx) : ORIGIN = 0x8000000, LENGTH = 64K }Here is my flash writing function. uint8_t Flash_Write(uint32_t startAddress, uint64_t data) { __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_OPTVERR); __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_BSY1); __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_BSY2); __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_PGSERR); __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_PGAERR); __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_CFGBSY); if(__HAL_FLASH_GET_FLAG(FLASH_FLAG_CFGBSY) == 1) { return 0; } HAL_StatusTypeDef status;

Hi All,I am beginner to drones. We assembled one drone using STEVAL FCU. 002. board ,  recommended set. of motors and. propellers along with battery. We Chose different. frame.  than. one recommended . It is smaller in size. While flying , vertical take. off. could. not be achieved.Can someone guide please ?Motor connections , Clock wise. ,  anti clock wise in reference. to alignment. of. the boards are checked. already.It is ST board. so. come equipped with all driver , frimware etc.Thanks in advance.Early and accurate response is. appreciated.Regards, 

Hello,I recently came across an ST article describing a Condition-Based Monitoring architecture using a dual-MCU approach, with an STM32L476RG handling signal processing (and potentially edge AI), and an STM32WL dedicated to network connectivity.I find this architecture very interesting and relevant for a project I’m currently exploring, but I would like to better understand what level of support and resources are available from ST for implementing such a solution in practice.In particular, I have a few questions:Does ST provide official support or reference designs for this kind of dual-MCU architecture (STM32L4 + STM32WL)?Are there any example projects, application notes, or firmware packages that demonstrate communication between the two MCUs in this context?Regarding FUOTA (Firmware Update Over The Air), are there existing solutions or middleware provided by ST that support this setup, especially with STM32WL acting as the communication node?Are there recommended tools, libraries,

Newest AN4879 does not list STM32C5 as applicable products.

Hi everyone, I am trying to setup DCMIPP Pipe0 to read data from 256x192 pixel sensor by 16 data lines. Seems everything configured and working fine except of transfer data to destination buffer. DCMIPP frame counter is increasing. Pipe0 dump counter is 0x18000 (256x192x2). HAL_DCMIPP_PIPE_Start return HAL_OK. Pipe0 packer memory address register is qual to Pipe0 memory status address register and correspond to address of buffer in RAM. I checked that DCMIPP don't write zero values by initing frame buffer with 0xFF and it wasn't changed to zeros.   I am sure that sensor is working because of frame counter, dump counter, checking lines with oscilloscope and it is working with other pcb with STM32H7 and DCMI interface.   Also I validated that debugger read frame buffer correctly by sending it thought uart.   Source code is simple, generated by cube init than I2C configuration of sensor(validated) and than reading in loop with delay: while (1) { H

Hi Team, I am designing a custom PCB using STM32H753 and planning to use the QUADSPI peripheral for external memory. My use case is data read/write (indirect mode) — not XIP or memory-mapped execution. While working in STM32CubeMX, I came across some configurations that are confusing, and I’d like to clarify the actual hardware behavior. 1. Dual Bank vs Chip Select behavior In CubeMX, I can configure: QuadSPI Mode: Dual Bank with Quad Lines Chip Select options: Enable Chip Select 1 for both banks Enable Chip Select 2 for both banks Enable Chip Select for each bank My understanding: NCS → Bank1 NCS2 → Bank2 Questions: If I select “Enable Chip Select 1 for both banks”, does this mean: Only one physical flash is used and banks are logical partitions? Or is there any way two physical memories are still utilized? What is the exact meaning of “bank” in this context (hardware vs logical)? 2. BK1_IOx and BK2_IOx pins confusion CubeMX exposes: QUADSPI_BK1_IO0

Hi,I have STM32H755ZIT3 controller, and I am tying to read voltage sensor AMC1333M10 and sensor has internal clock of 10 MHz . I am trying to read on controller DFSDM channel 7, core M4 with clock 64 MHz . Is this practically possible to read in such a configuration ? As when I read the value(dfsdm_buffer), it is always 7 (~0) whether there are voltages on the terminal or not.Code: // start HAL_DFSDM_FilterRegularStart_DMA(&hdfsdm1_filter0, (int32_t *)dfsdm_buffer, BUFFER_SIZE); // callback : void HAL_DFSDM_FilterRegConvCpltCallback(DFSDM_Filter_HandleTypeDef *hdfsdm_filter) { ... }Following is my configuration for DFSDM in MX : Channel 7 : "PDM/SPI input form ch7 and external clock"Channel 7 :Channel 7 Parameters:Type : "SPI with rising edge"Offset : 0Right Bit Shift : 0x00Analog watchdog parameters:Filter Order: "Sinc 3 filter type"Oversampling: 1Filter 0:regular channel selection:regular channel selection: "Channel 7"Continuous Mode: "Continuous Mode"Trigg

I am using ST’s Motor Control Workbench (MCW) version 6.3.2 to control a sliding door. I am using PMSM as motor and FOC as control method. PMSM has 10 pole pairs and there is a 1024 ppr incremental quadrature encoder on it (has not index pin). I am using Nucleo-G474RE, STEVAL-IHM023V3 and X-Nucleo-IHM09M2 boards. I am having trouble with encoder alignment. if I'm not mistaken, ST MCW uses “move till aligned with phase A” method (see attachment) as the encoder alignment. But i have a mechanical limit and this will not allow the motor to perform the needed alignment movements. I have posted this in the motor control forum. Not answered yet (https://community.st.com/t5/stm32-mcus-motor-control/incremental-encoder-alignment-problem/td-p/775343) Does ST have any plans to update MCW software to include the motionless start method into speed sensing configuration in the near future? Can anyboady give/share source code/flow chart etc.? Any information you provide will be gl

Hi,I am working with the STM32N6 series MCU on the STM32N6570-DK board and have encountered a pin multiplexing conflict.As per the schematics and datasheet:PA15 (JTDI) and PB4 (JNRST) are multiplexed with LTDC signalsThese pins do not appear to have alternate mappingsMy use case requires:LTDC for driving the displayJTAG for debugging (full JTAG, not just SWD)However, enabling LTDC conflicts with the JTAG interface, specifically JTDI.I have a few questions:Is there any supported way to use both LTDC and full JTAG simultaneously on STM32N6?Are there any alternate pin mappings or remap options available that are not obvious from CubeMX?Is dynamic switching (e.g., using JTAG during debug and reconfiguring pins for LTDC at runtime) a viable or recommended approach?Are there any hardware workarounds or recommended debug strategies for this scenario?I understand that switching to SWD avoids this issue, but I would like to confirm if full JTAG usage is fundamentally incompatible with LTDC on t

Hello ST Community,I am facing a critical issue with my STEVAL-PROTEUS1 board. The device is in a state where neither the wireless stack nor the application code can be updated or debugged.1. Corrupted Device Information (SWD_READ_FUS.PNG)When reading FUS info via ST-LINK (SWD), the device returns corrupted version numbers:FUS Version: v68.39.fffffe0.7STACK Version: vfffffff0.0.68.78  2. FUS & Wireless Stack Operation Failures (SWD-START-FUS.PNG / SWD-START-WIRELESS.PNG)Attempting to start the FUS or Wireless Stack results in:Error: FUS_STATE_ERR_UNKNOWN: Unknown errorLog: Start FUS Operation Failure! and Start Wireless Stack Operation Failure!3. Flash Write & Verification Mismatch (SWD-UPLOAD-CODE.PNG)I am unable to flash a standard application elf file. Even though the device is connected via SWD:Error: Data mismatch found at address 0x08001000 (byte = 0x12 instead of 0x00)4. USB DFU Mode Inconsistencies (USB-READ-FUS / USB-START-WIRELESS)Switching to USB (PID: 0xDF11) s

Hello ST,What is the maximum current draw into the STM32H563/573's VDDUSB pin, please? Is this the same as IDD(USBBCD), i.e. 300 uA (ds14258 rev.6 Table 120)?

Hi, please share CMRT (Conflict Minerals Reporting Template) EXCEL FILE FOR STM32F051K8T7

Hello guys, I would like to know if it is possible to directly connect  NUCLEO-F446RE board with  steval-mic003v1 mic array without any expansion board. Would love to know your feedback and much appreciated.