STM32 MCUs

Hello Community, I am working on an STM32N657X0H3Q project and have successfully configured both USBX and X-CUBE-FREERTOS (v1.4.0) within the same Application runtime context using CubeMX. My goal is to implement a USB CDC Composite device. Since USBX traditionally relies on Azure RTOS (ThreadX) for its RTOS primitives, I am seeking the recommended best practice  for running USBX on a FreeRTOS-based system.   Should I configure USBX in standalone mode? If running USBX in Standalone mode, what is the best way to handle thread safety when accessing the USB CDC interface from multiple FreeRTOS tasks?  Are there any known issues using the USBX Composite Builder when the underlying kernel is FreeRTOS instead of ThreadX?

Working on STEVAL-SPIN3201 board and need help in expected low-speed torque performance using Field-Oriented Control (FOC).System Configuration:Motor Driver Board: STEVAL-SPIN3201Motor: 3-phase BLDC (Rated torque=0.25Nm)Position Feedback: Hall sensorsObserved BehaviorDuring testing, I observed that the motor struggles to start at lower commanded speeds when a load is applied.Load: 0.05Nm1000–1500 rpm: Motor struggles to start.2000 rpm: Motor starts reliably.Load: 0.1 Nm1000 rpm: Motor does not start.1500–2000 rpm: Motor struggles to start.3000 rpm: Motor starts reliably. Whether this behavior is expected and advise on any key parameters (e.g., startup current, Hall alignment, or rev-up settings) that should be optimized?Is there any startup current limitation in STEVAL-SPIN3201 firmware?FOC should provide high torque at low speeds, including during startup. However, the current behavior suggests that the available starting tor

Hi, You know, there are some strict requirements about MCU used in optical module or production,  which include1. Size and package2. Internal resource3. IO amount, especially  ADC and DAC with >= 12bit resolution which be used to monitor signal and control4. Power efficiencyCould you please recommend latest ST MCU which are used widely in ultra high-speed optical module such as OSFP and NPO? or, share me roadmap about ST MCU series used in optical production? Thanks in advance!Best regards!Jason

I have this Riverdi board with a STM32H757XIH6 microcontroller. I have been using it consistently and loading touchgfx programs on it.  Today I was trying to use the 40 pin header and program one of the gpio pins on it to act as a gpio output. I put an led on a ground and the PA4 pin, which was the pin I was using on the 40 pin header, to verify the toggling code was working.  Nothing happened and so I tried to load a basic program onto the board using stmcubeMX and selecting the  STM32H757XIH6 microcontroller.   I selected the PA4 pin on the .ioc file and generated the code.  However, when trying to run the program I get this error, . Not sure if it was that program or touching the multi meter to certain pins that cause a hard fault or something.  I would not think a multi meter could do anything like that, but I'm trying to figure out why all of a sudden I am unable to upload a program to the board when I have been consistently.&nbsp

I am using STM32H7R7L8H with MX25L12833F external memory. I created a project with has bootloader, application and external memory loader.Before starting this project I opened another to test if I can read/write/erase MX25L12833F. By using XSPI in Quad mode I could do all the operations.   Below I shared the configuration: XSPI1: EXTMEM_LOADER: EXTMEM_MANAGER:   With this configuration I built the project and it generated external loader. In STM32CubeProgrammer I can read MX25L12833F memory, it can do mass erase too but it can't do sector erase.   I created an application hex which is located at 0x90000000 and tried to write this file to external memory by using generated loader. Here is the result: 00:51:51 : Opening and parsing file: Appli.hex 00:51:51 : Memory Programming ... 00:51:51 :   File          : Appli.hex 00:51:51 :   Size          : 8.54 KB 00:51:51 :   Address   &n

Hi everyone,I am working on a custom PCB designed , but I’ve run into a hardware design constraint and would appreciate some architectural advice on the best way forward.The Setup:Main MCU: STM32L476 (Programming via STM32CubeIDE / HAL)Coprocessor/WiFi: ESP32-WROOM (Intended to handle AWS IoT connections)The Constraint: The PCB designer connected the STM32 and ESP32 exclusively via an I2C bus. There are no physical UART traces connecting the two chips.The Original Goal: The initial plan was to use the STM32 to write firmware directly to the ESP32 over UART, or to use a UART software bridge, and then use UART for passing sensor data to the ESP32 for AWS publishing.The Dilemma: Because the ESP32 ROM bootloader requires UART0 (TX0/RX0) for flashing, I realize a software bridge from the STM32 over I2C to flash the ESP32 is physically impossible.My Questions for the Community:The Initial Flash: Aside from tack-soldering temporary wires to the ESP32's TX0/RX0 pins to perform the initial flas

Hello,I am planning to use STM32H562RGT6 in my product to communicate and update my firmware via CAN FD.To plan that, I am using STM32CubeMX 6.17.0, the datasheet and the AN2606 (Rev 70).And I would like to use only one CAN FD to communicate and to update my firmware in this MCU. But it is impossible to do this in STM32CubeMX. I have only access to FDCAN1. And there are no FDCAN2 on the pins.So, is it a problem in STM32CubeMX ? Or should we use FDCAN1 to do firmware updates via FDCAN for this MCU ?PS: it is the same problem with the MCU STM32H562VGT6 (and maybe other similar MCUs) 

I have followed the datasheets and tried to calculate my reference voltage. I am supplying steady 3V on Vref+ pin but I wanted to confirm this because I have some troubles with the ADC precision.So I read the internal voltage both on my card and on a nucelo-C092rc. This is my results: My board:Vref+ = 3.0 * 1659 / 1805 = 2.755Nucelo board:Vref+ = 3.0 * 1665 / 1641 = 3.043However I am quite certain that the nucelo boards are using 3.3 V as reference and my board are using 3 V as reference.So if I swap the 3.0 V from the datasheet into 3.3 V I get the following:My board:Vref+ = 3.3 * 1659 / 1805 = 3.033Nucelo board:Vref+ = 3.3 * 1665 / 1641 = 3.348Which match more my expectations, can someone confirm or deny this typo?I add my adc init function:u16 uiDelay = 0; ADC_CFGR2.CKMODE = 0x0; // Clock mode set to ADCCLK ADC_CCR.PRESC = 0x2; // ADC prescaler set to 48MHz / 4 = 12MHz ADC_CFGR1.RES = 0x0; // Set 12 bit resolution ADC_SMPR = 0x07; // Sampling time set to 1,5 ADC clock cyc

Hello,   While using the Nucleo-F446ZE, I observed that pin PA1 remains at approximately 2.6 V during reset, even when an external pull-down resistor is applied. On this development board, PA1 can be configured as the RMII Reference Clock. However, I have removed SB13, so this function should be disconnected and no longer influence the pin. Given that no internal or external circuitry should be driving this pin and considering that an external pull-down resistor is present I would expect PA1 to be held at 0 V during reset.   Why the pin is not pulled low in this condition?

Hello,I have a few questions regarding image and audio formats on STM32U5.For graphics with TouchGFX, I see that PNG is usually used. However, in some MCU documentation it is recommended to use JPEG. Also, when I try to add a JPEG image directly in TouchGFX Designer, it does not work.Which format is preferable between PNG and JPEG for TouchGFX?Why is JPEG recommended in some MCU documentation?Is JPEG intended only for dynamic loading with software or hardware decoding?What is the recommended way to use JPEG images with TouchGFX, if possible?Regarding audio on STM32U5, which audio format is recommended such as WAV, MP3, AAC or other?Is there a specific library recommended for audio playback on STM32U5?Is there an optimized solution provided by ST?Thank you in advance for your help.

Hi, Our product uses 2 x STM32WB55 MCUs, where one as Server/Coordinator and the other one as Client/Router for Zigbee.  However, our customer prefer to use customized PAN ID or Extended PAN ID so that more controllable and traceable by their application software later. Below is the setup of the Server/Coordinator and Client/Router in my firmware (modify based on sample code "Zigbee_OnOff_Server_Coord & Zigbee_OnOff_Client_Router"). ** Server/Coordinator :startupControl = ZbStartTypeForm;config.panId = 0x0001;  // range from 0x0001 to 0xfffeconfig.extendedPanId = 0x00001; // incremental from 0x01 onwards ** Client/Router:startupControl = ZbStartTypeRejoin;config.panId = 0x0001;  // range from 0x0001 to 0xfffeconfig.extendedPanId = 0x00001; // incremental from 0x01 onwards Questions:1. May I know the configuration above is enough and valid to do so?2. What are the steps needed or I missed out in order to use customized PAN ID or extended PAN I

Hello - I have a product I am commercially developing for a company - an industrial sensor system - STYM32G474 x 8 - using them for their very fast ADC - all good so far. I am using a SPI bus to get all the data back to as Linux SBC (pi CM5 for now - might change next year - needs 2 cameras and NVME).I would like to update all the STM32G474 over UART (for now) then over to SPI for production - using the raspberry pi cm5.Is there an open source C++ / python program that can do this from ST? - something like the old "https://github.com/stm32duino/stm32flash" but supports the newer chips? perhaps OpenOCD would work but that is even more connectors etc.

Hi,  I would like to know when samples and kits for the new STM32H5E4/5E5 will be available.I already asked my local distributor this question, but they didn't know the answer. Ari

Hardware: STM32G473QETXHAL Version: STM32G4 HALI2C Mode: Slave mode using HAL_I2C_Slave_Seq_Receive_IT()Application: DS1307 RTC emulation Issue DescriptionWhen implementing an I2C slave device (DS1307 RTC emulation), we observe that HAL_I2C_ErrorCallback() is consistently called with error code HAL_I2C_ERROR_AF (0x00000004 - Acknowledge Failure) at the end of successful write transactions from the I2C master Transaction FlowMaster sends START + Address (0x68) + WRITESlave ACKs (address match detected)Master sends data bytes (8 bytes total)Slave receives all bytes correctly via HAL_I2C_SlaveRxCpltCallback()Master sends NACK (to signal end of write)Master sends STOPHAL_I2C_ErrorCallback() is called with HAL_I2C_ERROR_AFHAL_I2C_ListenCpltCallback() is also calledExpected BehaviorAccording to I2C protocol, the master sending NACK at the end of a write transaction is normal behavior to signal "I don't want to send more data." This should not be reported as an e

Hi,I am at the beginner/beginning stages trying to pick up STM32 ecosystem involving touchGFX and a display board STM32H7S78-DK. For now I would like to interact a touch button on screen to turn on an LED.Could I get guidance on the overall workflow if it is correct:1) touchGFX - generate UI and generate code2) open up STM32CubeIDE and import touchGFX generated .cprojects and other supporting files3) edit .ioc file to set LED pin (PO1) as output (active-low). save and generate code4) stm32CubeIDE -> build and run -> LED PO1 turns on but my display goes blankover at touchGFX when I try to regenerate code it states [generate code failure] Could I get some guidance thanks. 

Hello,TouchGFX seems to have some sort of a “bug”, where in PORTRAIT orientation the text will glitch with some weird white lines, unless there is an image in the item-tree situated ABOVE text items. It doesn’t have to be any image in particular, but MUST be an image.If there isn't any image added, then every text element is glitched the moment I rotate to PORTRAIT:touchgfx::HAL::getInstance()->setDisplayOrientation(isPortrait ? touchgfx::ORIENTATION_PORTRAIT : touchgfx::ORIENTATION_LANDSCAPE);The glitched text looks as such (see the white weird lines corrupting the text):This is my item tree in TouchGFX Designer (I also tried removing the background but the white lines remained):Then, if I add any kind of image, any text area under that image in the designer stack-up, it will be displayed without glitches and any text area placed above will glitch as such (Note, the XY location in the screen does not affect this, only the stack-up arrangement!):This is the stack-up to produce such

I am using a custom PCB design with a 480x800 pixel RGB input LCD display. I am driving the display via the LTDC peripheral. When I change the default colors, the color on the screen changes accordingly, which indicates that there is no apparent hardware issue with driving the LCD.However, when I try to display a simple text on the screen using TouchGFX, the system enters the DMA2D_XferErrorCallback function due to a DMA2D error. Because of this, the text cannot be rendered on the display.Could you please explain the possible reasons for this DMA2D transfer error and what might be causing it? best regardsCelil Bayrakdar

  Hi, Currently I face problem that TouchGFX 4.26.0 use a lot of PC RAM up to 9GB RAM Project info: Resolution 480x800 Number of screen 26 Number of custom container 82 Support language: 5 Typographies: 25 With the same design for resolution 272x480 use up to 3GB RAM How can I reduce number of RAM usage? Thanks, Phat

There have been great improvements to TouchGFX  Designer and the build process.  It now cleanly allows integration into the STM32CubeIDE project structure.  The problem is that even though you can provide a project name and the output will be placed in a folder with that name, the .IOC file always has the same name as every other project made with the same device.  My workflow from the Designer, to CubeMX to CubeIDE is painless.  Generate code, then allow CubeMX to open the project and it's imported into CubeIDE.  The first project is great.  If you go back to Designer and create a different project with the same device, the process breaks down.  You'll have the same project as the last project as far as CubeIDE is concerned.  Now if you create a new workspace for each project, you can get all of your projects imported albeit you have to switch workspaces.  You can at least name them, so you know what project you're working on.  No

I am using the STM32L433 MCU and both the HID and VCP interfaces are not working even though the DFU is.I am simply using the STM32CubeMX software to generate a standard default USB Setup but I keep getting the same Windows USB Error "USB Device Not Recognised" which is the "Device Descriptor request failed".My hardware is a custom design and believe that I have the correct differential impedance or the DFU would not have worked. VBUS is at 3.3V (<4V)D+/D- traces > 2 inches but differential impedance has been matched to 90 Ohms using Altium.I have a 12MHZ Crystal, the MCU can run Crystal-less.USB is 48MHz but runs from RC, also used PLLSA1 from HSE.STM32CubeIDE v2.1.1MX_USB_DEVICE_Init() called. If the DFU is working then why not the other USB Interfaces?

Hi Team,I am working with the STEVAL-SPIN3202 evaluation board and facing an issue while trying to flash firmware to the target MCU.Setup Details:Board: STEVAL-SPIN3202Programmer: Onboard ST-LINKTool: STM32CubeIDEIssue Description:ST-LINK is detected in STM32CubeProgrammer but not able to connect to the target MCU STM32F103CBT6Programming fails consistentlyPFA, Kindly suggest to resolve this issue.Thanks,HimansuSmall Signals India Pvt. Ltd

Hi,We are looking for a WiFi module or preferably a WiFi + BT module to be used in a battery-operated device where audio files are recorded onto a uSD card and whenever required they are downloaded through WiFi or BT link to a PC. For context, the audio files are 20MB in size.These are the main specs:- pre-certified module: WiFi or WiFi+BT- highly reliable for mass production- uSD card interface (specific for audio and files)- means to record and play back the audio files- low-power - compact & SMD- straightforward to integrate from a firmware perspective (library available) and well supported in terms of documentation and ecosystem.Could you please make recommendations:- for such suitable modules?- for alternative system architecture using ST products and ecosystem to implements such device?Thank youRicko

I am using STM32G0B1KCT6 MCU, i would like to use the full flash of 256KB starting from 0x8000000 to 0x803FFFF. but am unable to flash in bank 2 (ranging from 0x8020000 to 0x803FFFF).if i reduce the flash size to Bank1 only, then am able to flash and run the code.I am aware its default dual bank MCU. PFA code snippet for changing it to single bank.Also tried changing it single bank using the stcubeprogrammer but still fails to flash the MCU.   void ConfigureFlashToSingleBank(void) { FLASH_OBProgramInitTypeDef OBInit; HAL_FLASHEx_OBGetConfig(&OBInit); /* Check if Dual Bank mode is enabled */ if (OBInit.USERConfig & FLASH_OPTR_DUAL_BANK) { HAL_FLASH_Unlock(); HAL_FLASH_OB_Unlock(); OBInit.OptionType = OPTIONBYTE_USER; /* Disable Dual Bank (enable linear 256KB flash) */ OBInit.USERConfig &= ~FLASH_OPTR_DUAL_BANK; if (HAL_FLASHEx_OBProgram(&OBInit) == HAL_OK) { HAL_FLASH_OB_Launch(); // triggers reset } HAL_FLASH_OB_Lock(); HAL_FLASH_Loc

HiI need help in erasing the device: STM32H735IGK3, This device is getting erased only till sector 0.There were total 8 sectors.I am following the steps given in  Reference manual for erase operation but still it didn't work.Could you please suggest something to resolve this issue with Erase?Or please point out the reason which is throwing this issue.Thanks!Saista 

Hi,I hope you are doing well. I am currently developing a project based on the STM32WBA55CGU6 MCU. The hardware design (PCB) and firmware have been developed and validated using this device, particularly relying on its BLE capabilities and STM32_WPAN stack. However, I am currently facing a supply issue, as the STM32WBA55CGU6 appears to be out of stock across major distributors and local suppliers in Türkiye (e.g., Digi-Key EKOM). I would like to kindly ask: 1- Is there an estimated timeline for restocking or production availability? 2- Are there any recommended drop-in or near drop-in alternatives within the STM32WBA series that can be used with minimal hardware and firmware modifications? Thank you very much for your support.