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Hi,I am using STM32L4R9ZIJ6 microcontroller.I have connected an external reference voltage of 3.3V to VREF+ pin and wanted to use internal reference voltage over this one for internal ADC read operation. Is that possible?I tried configuring the MCU to enable VREFINT for internal ADC1 read but I can still see that the external 3.3V is being taken by the ADC for conversions. Can someone please answer this?Thanks.

Dear STMicroelectronics Support Team,I am working with the STM32U585I-IOT02A development board, and I need assistance with the following:Entering and waking from low power modes (STOP2 or STANDBY) using the RTC wakeup timerConfiguring UART1 with DMA and ensuring it resumes correctly after waking upHandling interrupts before and after sleep modesI have tried implementing the configuration using STM32CubeIDE and HAL libraries. However, I'm encountering issues where UART DMA does not resume correctly after wake-up.I would appreciate any official guidance or example code specific to STM32U585.

Hi, I'm trying to configure an STM32H753 FDCAN peripheral to be compatible with both CAN-FD & CAN 2.0 frames, in both the Tx & Rx directions.   How should I configure the FD-CAN peripheral to achieve this? I've been through he RM0433 document as best I can and am struggling to find this information.

I am trying to connect the custom board to the mems studio to measure the euler angles and to explore the mems studio? is it possible to connect the custom board?

I want to use the SMT32N6 VFBGA142 or VFBGA169 package.  These parts do NOT have XPSIM_P1(on port PO).  They only have XPSIM_P2(on port PN).Can I connect both Octo FLASH and Octo PSRAM on port PN and use the two chip selects (NCS1 & NCS2) to independently talk to the chips?  I need to boot off the FLASH and then use the PSRAM to execute the program.Any signal integrity issues or gotchas I need to keep in mind? 

When we use 3920B to read the M1 card, the data sent to 3920B by MCU is "60 3C 1A 80", but compared with the data sent by 3920B captured by equipment, it is found that there are two more bytes "00 00" behind the data sent by 3920B. The difference is shown in the attached picture. Why does the data sent by 3920B have two more bytes? Will this extra byte affect the total length of bytes sent?Use the rfalNfcDataExchangeStart () function to send data, but only the interruption of sending data is completed, and there is no interruption of receiving data, so it has been circulating in do while. The card did not reply to the data sent by 3920B. Is this phenomenon related to the abnormality of the data sent by 3920B?

Hello everyone,I'm developing a dual-core FreeRTOS application on an STM32H755ZIT6 using STM32CubeIDE, and I'm facing an issue where the HSEM handshake is not working as expected.My goal is to have a FreeRTOS task on the Cortex-M7 block and wait for a signal from the Cortex-M4.Expected Behavior: The M7 task calls HAL_HSEM_Take() and should be blocked by the FreeRTOS scheduler until the M4 calls HAL_HSEM_Release() on the same semaphore.Actual Behavior: The M7 task calls HAL_HSEM_Take() and it returns immediately, without blocking. This happens even when the corresponding HAL_HSEM_Release() call on the M4 is commented out for testing, causing the M7 task to loop continuously. Debugging Steps I Have Already TakenVerified Core IDs: I have confirmed in the project properties that the M4 project has the CORE_CM4 define and the M7 project has the CORE_CM7 define.Implemented Handshake Logic: I have implemented the standard handshake where the M7 "primes" the lock by taking the semaphore o

Hi,The example for FSBL works as describedhttps://community.st.com/t5/stm32-mcus/how-to-configure-the-linked-list-mode-in-stm32cubemx/ta-p/693779But if the same approach is applied to Appli (Secure) code, the "User Setting Error" raised in DMA IRQ.I use the XIP configuration.Could you please elaborate chages to be made in Secure code? 

Hello Community, I've been trying without success to setup an SPI interface to a LCD panel.  It's an LTDC 24-bit panel but requires configuration over its 3-wire SPI interface.  I'm using STM32CubeMX 6.15.0 and STM32CubeIDE 1.19.0. Here's the details: The display contains an ST7701S IC that has a 9-bit, half duplex, SPI interface, operating mode RGB+9b SPI(rise).  In this mode the display accepts 9-bit data - the MSB bit (8) indicates whether the following byte is a command or data.  I can issue commands to the display and have it do things (turn all pixels ON/OFF as an example) but I'm unable to successfully read from the device.  A read is initiated by transmitting a read command and then reading the response over SPI.The display is connected as follows: and I have configured it in CubeMX as follows (Note CS and RESET are configured as GPIO outputs).   The timing diagram in the ST7701S datasheet looks like this : This display is using Interface 1

Hi,We are developing a desktop application on Python using Qt's PySide6 library and one of our goals is to build a STM32CubeIDE project from this application. I have read that we can achieve this via command line. I can successfully run command line prompts from Python but what I wanted to ask is that should we use `stm32cubeide` from command line, which makes STM32CubeIDE is a dependency for our project, or should we use another compiler like `gcc` or `eclipse` headless builds? These options could achieve what we are trying to do but I wanted to take your opinions on this matter.Here are some of the examples I found so far in ST Community Forum and in web:In this link for Eclipse headless builds we can achieve the build with something like:$ eclipse \ --launcher.suppressErrors \ -nosplash \ -application org.eclipse.cdt.managedbuilder.core.headlessbuild \ -data /path/to/workspace \ -cleanBuild "project/configuration" In another post in the forum it is mentioned that we can us

Hi,currently I am working with the NUCLEO-WL55JC1, using the STM32Cube FW_WL V1.3.0 and the LoRaWAN_End_Node example as base.My target is to keep the LoRa stack working as it is on the example, but also to use the RTC to store the current date and time values, since I have to log the measurements with timestamp on an external memory. When I try to use the RTC Bin Mode set to "Free running BCD calender and binary mode" or "Free running BCD calender mode", the example simply stop working. The last log I get on screen is : "MAC txDone".Is that a way to use the internal RTC to save current date and time, and keep the LoRaWAN stack working?System info:STM32CubeIDE : 1.11.2 (Windows version)STM32CubeMX : 6.7.0-RC4I've found someone with a similar problem, but I was not able to solve my problem with the given answer (Question : BCD Calendar and Binary mode (mix mode) alarm is not working in STM32WL55 by digidhamu)Many thanks in advance!

Hello guys!I'm working with STM32WL series using the LoRa application, for that the RTC must be in binary mode.However, I need the calendar and timestamp for my project, which implies that I need to use BCD mode.I'm aware that the RTC3 has the mixed mode, however, whenever I tried using it, the whole project stopped working.I've been reading the AN4759, and the posts about it in the community, but I have some doubts about the solution.LoRa uses the alarm A, which requires the subseconds alarm, and I know that the calendar doesn't work in binary mode, but can I activate somehow by software the calendar and timestamp still in binary mode? (if so, how and where in the code?)Other thing, while using the mixed mode, what I have to do to make it work like in binary mode but with the calendar? Like, I saw that I might have to transform binary date to BCD, is it necessary? If so, I'm confused how and where in the code I do this. Also I need to adjust the alarm A again, right? What do I have to

Hello everyone,I am using MCSDK 6.4.1 to create my custom inverter board. I have configured the internal Op-amp's PGA gain.However, when I load the configuration into the MCSDK project, it is not detected, and I am unable to select a gain of 16.MCSDK doesn't recognize my board config, and it doesn't calculate the current range.If it's not MCSDK that's wrong, please help me fix my wrong configThank you.    

Following the instructions at https://wiki.st.com/stm32mpu/wiki/How_to_start_the_Cortex-M_coprocessor_from_U-Boot#Manual_start I try to load and run an M33 app from U-Boot.Within the U-Boot console I managed to load the elf file from the boot partition. But I can't load the file to the M33 coprocessor using rproc.rproc is available in the console, but doesn't show any coprocessor:STM32MP> rproc init Remote Processors are already initialized STM32MP> rproc list STM32MP>  My board is from MYIR with an stm32mp257D MPU on it using:- I/TC: OP-TEE version: 3.9.0-3162-g355cb55d2 (gcc version 12.3.0 (GCC)) #1 Fri Nov 1 10:58:57 UTC 2024 aarc- U-Boot 2022.10-stm32mp-r2 (Nov 07 2024 - 02:59:13 +0000)CPU: STM32MP257DAL Rev.YModel: MYiR STM32MP257F Evaluation BoardBoard: stm32mp2 (myir,myb-stm32mp257x-2GB)DRAM: 2 GiBoptee optee: OP-TEE: revision 3.19 (355cb55d)Core: 416 devices, 38 uclasses, devicetree: boardU-Boot config has COPROC settings:CONFIG_REMOTEPROC=Y C

I am facing an issue with BLE connection on the NUCLEO-WBA55CG board.Using the same .ioc file:When I generate the code for STM32CubeIDE, the project builds and runs fine, and I can connect to the device successfully using the ST BLE Toolbox app.But when I generate the code for IAR, the project builds and runs, but the device cannot be connected. On the Android app, when I press Connect, it briefly shows Connecting and then reverts back to Connect, without establishing the connection.So the only difference is the toolchain (CubeIDE vs IAR).Environment:STM32CubeMX 6.15STM32Cube_FW_WBA 1.7.0IAR Embedded Workbench (please fill in your version here)STM32CubeIDE 1.19.0IAR 9.60Has anyone experienced this issue? How can I make the BLE connection work properly with IAR as well? 

I came across this shared project: Nucleo Mechanism Control Board  (link below), which is designed to interface with an STM32 Nucleo board for controlling actuators (vacuum pump, air valve, stepper motor, AX-series actuator, servos).https://www.pcbway.com/project/shareproject/Nucleo_Mechanism_Control_Board_b3dd524d.htmlI have a few questions/suggestions and would appreciate any advice or feedback from people familiar with similar designs:What would be the best practices for ensuring safe power regulation on this kind of board when driving mixed loads (vacuum pump + stepper + servos)?Are there any considerations or potential pitfalls when routing signals and grounding for both high-current actuators and more delicate control signals in this layout?For the stepper & AX-series actuator: would off-the-shelf driver modules be sufficient, or is there benefit in integrating custom driver circuitry (e.g. to improve motion smoothness, reduce noise, or increase reliability)?If I want to

Hi,I have a custom developed stm32 project with stm32f411ret6 mcu, i have done my full board and got the pcb printed. I have a 4 pin header on my pcb with vcc,gnd, swdio, swclk for uploading the bootloader for the first time. I have done this several time earlier successfully with stlink/v2 programmer, but now it shows the error(image 3 at bottom): Next I bought a stm32f446 nucleo board and tried with the onboard stlink by removing both the jumpers to program this mcu on the custom pcb, still stlink does not connect.  On my pcb header 3.3v power is also coming successfully I have checked it too.    Also, my boot pin and nrst is connected on custom pcb like this:  under both stlink connection methods i am getting this error, trying to solve these for many days and getting the same connection issue as follows, please help me,  

Hi, Im using my own I2C library but after i write the device adress when i receive SB interrupt the adress bit never seems to be set to 1. I have tried testing it with HAL and it seems to work fine. I would be happy if someone could helpvoid I2C_EventInterruptHandler(I2C_Com* i2c) { uint8_t temp; //Check if event interrupt bit is set if(I2C_CheckBitStatus(&i2c->i2cReg->I2C_CR2, 9)) { //Start condition if(I2C_CheckBitStatus(&i2c->i2cReg->I2C_SR1, 0)) { temp = i2c->i2cReg->I2C_SR1; i2c->i2cReg->I2C_DR = i2c->deviceAddress; } //Check for address sent if(I2C_CheckBitStatus(&i2c->i2cReg->I2C_SR1, 1)) { //Check if its in read mode and if rxLegth is 1 if(i2c->deviceAddress & 1 && i2c->rxLength == 1) { //Disable ack i2c->i2cReg->I2C_CR1 &= ~(1 << 10); i2c->i2cReg->I2C_CR1 |= (1 << 9); } temp = i2c->i2cReg->I2C_SR1; temp = i2c->i2cReg->

Installing EGit for Eclipse 6.7.0 in STM32CubeIDE 1.19.0 stops the display of Help Topic contents.I have a clean install of CubeIDE.Opening menu item: Help -> Help Contents opens the Help window OKOpening menu item: Help -> Show Context Help Contents opens Help window OK and Topic content can be selected and viewed.After installing EGit the Help window no longer shows at all and selecting any topic in the Help pane is an empty page. The Git functionality seems to work, staging, commit and compare to a local Git repository, I have not tried with GitHub at this time.There was a warning during EGit installation:I don't know if this is related, but even before installing EGit the log file has this message logged every second:!SESSION 2025-09-21 19:51:02.272 ----------------------------------------------- eclipse.buildId=Version 1.19.0 java.version=21.0.3 java.vendor=Eclipse Adoptium BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_GB Command-line arguments: -os win32 -ws

Hi,I'm just getting started with C programming for embedded Linux using the STM32MP13x. My applications are mostly IoT applications.I'd like to know which IDE is best for beginners, between STM32CubeIDE and Visual Studio Code.And where can I get information on how to configure these IDEs to compile and debug user-space C applications remotely?Ari 

Hi,I recently bought two NUCLEO-WL55JC1 boards and was testing the SubGHz_Phy_PingPong example to establish communication between them. Everything was working fine at first, but at some point (I’m not sure if I changed anything), one of the boards stopped being recognized by STM32CubeIDE when trying to debug.The error message is:"Target no device found. Error in initializing ST-LINK device. Reason: No device found on target."When I connect the board to the PC via USB, it is detected, but a FAIL.TXT file appears with the message:"The interface firmware FAILED to reset/halt the target MCU".I know the firmware is still loaded because, when powered, this board still sends messages that are received by the other one (which works normally).The jumpers on both boards are configured the same way, and I have tried debugging through both USB and SWD without success.Is there a way to make STM32CubeIDE detect the board again? What could be the cause of this issue?Thanks in advance for your support

Hi All, Looking to see if there are any replacements for the VN05NSP. Attached is the datasheet for it.   I found VN5E006ASP-E but am not sure if it could work. Attached is it's datasheet as well.   Thanks for any help. Byron

After adding many text fields, resources, and typographies to a screen, I went to compile and was met with errors that generated base classes were using text IDs that did not exist. The text ID's had been added to the source files for the containers they were used in, but not to the header file or TEXTS enum.In an attempt to "clean" the project I deleted the contents of the TouchGFX/generated folder. The designer regenerates source files, but generated/texts/include/texts is empty. I have tried to add/remove resources in the designer so it would detect changes in the spreadsheet without any luck. With an empty folder my compile errors are now:../TouchGFX/target/generated/TouchGFXConfiguration.cpp:17:10: fatal error: texts/TypedTextDatabase.hpp: No such file or directory #include <texts/TypedTextDatabase.hpp> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~How can I force the designer to regenerate these files?

Hello STM32 Community,I'm having trouble getting UART communication working on my NUCLEO-L4R5ZI-P board and would appreciate any guidance.Board Details:NUCLEO-L4R5ZI-P with STM32L4R5ZIT6PUST-Link firmware updated to the latest versionProgramming/debugging works fineLED control works perfectlyProblem: No UART output appears in any terminal program, despite testing multiple configurations. The virtual COM port is detected by both macOS and Windows, but no TX activity occurs (TX indicator never lights up in terminal programs).What I've Tested:USART2 on PD5/PD6 (as shown in STM32CubeIDE pin configuration)USART3 on PD8/PD9 (based on datasheet D0/D1 assignments)LPUART1 on PG7/PG8 (documented as virtual COM port option)USART2 on PA2/PA3 (standard NUCLEO configuration)Multiple alternate function mappings (AF7, AF8)Different baud rates (9600, 38400, 115200)Tested on both Mac (CoolTerm) and Windows (PuTTY)Hardware Verification:Solder bridges SB130 and SB131 have resistors (closed)GPIO test on PD

Good day I am having many troubles with implementing FUOTA on my Dev kit. Firstly, I have downloaded the STM32Cube_FW_WL_V1.3.1 firmware. When i edit the script files to build using the latest cube ide (1.19.0) the build fails with many errors. I then downgraded to V1.17.0 and changed my script file. The Lorawan FUota single core project was able to build and i was able to flash it to my device. When i attempt fuota on my nucleo-wl55jc1 device everything happens as expected. However, When the device switches from class A to Class C and begins to receive fragments I encounter a hard fault:   The server continues to send fragments but the device has essentially stopped. I did deep dive online and found that this is a known issue:https://community.st.com/t5/stm32-mcus-wireless/stm32wl-fuota-single-core-not-working-on-fw-wl-v1-3-0-in-eu868/m-p/608263 Please could you add this to my enquiry I am losing hope that I may get FUOTA working. Kind