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Dear STM32CubeIDE Support Team,while analyzing the memory usage of my STM32 project, I noticed a potential inconsistency in how memory units are displayed in STM32CubeIDE.Both the Build Analyzer and the memory overview label the values as “KB”, but the reported numbers clearly correspond to KiB (1024 bytes) rather than kB (1000 bytes). This behavior matches the output of arm-none-eabi-size, which reports sizes in bytes.For example:arm-none-eabi-size reports Flash usage as:text + data = 64824 + 148 = 64972 bytesConverted to kB (1000 bytes), this would be:64.972 kBHowever, STM32CubeIDE displays:64972 / 1024 = 63.45 KiB, while labeling the unit as “KB”As a result, summing RAM and Flash values only produces consistent results when interpreting the displayed “KB” values as KiB. The current labeling can therefore be confusing, especially when documenting or comparing memory usage.I have attached two images that illustrate this behavior and show the comparison between arm-none-eabi-size and t

I'm reading RM0492 Rev 3 about I2C's controller transmitter. The original words on the page of 1185 areWhen RELOAD = 0 and the number of data bytes defined in NBYTES[7:0] is transferred: • In automatic end mode (AUTOEND = 1), a STOP condition is automatically sent. • In software end mode (AUTOEND = 0), the TC flag is set and the SCL line is stretched low, to perform software actions: – A RESTART condition can be requested by setting the START bit of the I2C_CR2 register with the proper target address configuration and the number of bytes to transfer. Setting the START bit clears the TC flag and sends the START condition on the bus. – A STOP condition can be requested by setting the STOP bit of the I2C_CR2 register. This clears the TC flag and sends a STOP condition on the bus. When a NACK is received, the TXIS flag is not set and a STOP condition is automatically sent. The NACKF flag of the I2C_ISR register is set. An interrupt is generated if the NACKIE bit is set. I'm co

Hi , I have developed a testcase where STM32H503 i3c is in target mode, requesting for controller role request that is going to controller (checked interrupt - Secondary Controller received Controller Role Request ) . After controller is sending GETACCCR command to target but in target side I3C_EVR.CCRUPDF bit is not set. Can you please guide me how to check CRR request. 

Hello,the board type is STM32N647A0H3Q, and before creating the project it's already turn on the dev mode as shown below.To validate ST link work with my PC, the STM32 Cube Programmer successfully connected to the board.However, my Cube AI Studio unable to detect the board. Thanks and Regards.An5

This is looking for more info from this original post * https://community.st.com/t5/stm32-mcus-embedded-software/i-am-using-usb-pd-system-with-stm32g071rb76-processor-there-are/m-p/219760#M53483     With a stm32 chip with only one CC line could i connect both of the CC lines together. This is a DFP I don't need VCON support If i were to do this could i still figure out what the orientation is?  

I’ve generated a project with Cube AI studio for a Nucleo N6 board, but , when I enable SAI2 peripheral in I2S mode, I notice from the oscilloscope that the bit clock line and FS line become corrupted/glitch when using NPU for inference, could somebody explain me why and how to solve it? I’ve used the same SAI configuration for another project without any AI algorithm and the signals from the pins are clean. I don’t know why, it’s a problem that I’ve been stuck for a month or so

Split from this post. Hello, Sorry to bother you again, but it seems that since yesterday (when I enabled the CAN bus), the UART on my Nucleo has stopped working, even though I haven’t touched anything since then.   To be precise, I’m monitoring my UART signal and I’m only getting ‘framing errors’, obviously, I’ve checked and the baud rates are the same on both sides.   Could activating the HSE clock have disrupted the operation of my UART ?   Thank you in advance for your help,

Dear ST Community,I have successfully run the Object Detection Application on the STM32N6 Discovery Kit using the reference firmware from the STM32AI ModelZoo.As part of extending its functionality, I am looking to implement the following two features:Convert the captured RGB frame to JPEG formatStore the JPEG image onto the SD card available on the Discovery KitFor the RGB-to-JPEG conversion, I have referred to this JPEF Encoder example and integrated this JPEG encoding logic into the object detection firmware. Specifically, I am feeding the nn_in buffer (used as neural network input) to the JPEG encoder. However, during execution, the program gets stuck at this line:jpeg_encode_processing_end = JPEG_EncodeOutputHandler(&hjpeg);The jpeg_encode_processing_end flag is not being set to 1, indicating that the encoding process does not complete. I suspect either the JPEG input handling is not progressing, or the DMA isn't properly triggering the required callbacks.Could you kindly

Hi, I want to know when the C/C++ Indexer will be updated to the latest C standard, that is, C23? I want to use some new language features, like double square brackets for attributes, but it still shows a syntax error, even though the code compiles without problems.Also, I would like to know when GCC 15 will be available. Best regards,Artur 

I've just installed the new STM32CubeIDE 2.1.0 and I came across some issues that didn't exist in previous versions.First, I noticed that the compiler always compiles all the source files even though only one source file was modified. I have large project with many source files and it takes about 2 minutes to compile all files. It's very annoying.Second, when launchinig debug session all the source files are compiled again. It didn't work that way in previous versions of STM32CubeIDE. If the files were compiled previously, the debug session was launched immediately.Is it possible to change this behavior but turning off some options or do I have to install older version of STM32CubeIDE ? 

Hi, I’m trying to configure the FDCAN peripheral on a NUCLEO-STM32H72ZG board, but even though it works perfectly in loopback mode, it doesn’t work when I switch to normal mode. Even in external loopback, when I check with the oscilloscope I don’t see any activity on the TX pin (no signal transitions). The same issue occurs on this board also with GPIOs. I tried the same setup on a NUCLEO-STM32F303RE board (using CAN instead of FDCAN), and everything works perfectly there.      

Dear all,I'm implementing Over-the-air firmware updates for a board using the STM32N657 MCU.In the Appli, I download the new firmware binary over Wifi and store it to RAM at a fixed location in AXISRAM5 and 6. In order to flash the new binary to the OctoSPI Flash I prepend a "magic" header to the new firmware binary (still in RAM) and then restart the MCU using `HAL_NVIC_SystemReset`. Then, after this reset the FSBL checks the fixed location in RAM for the "magic" header. If present, it should flash the OctoSPI Flash with the new firmware binary using the ExtMem Manager (I cannot just flash directly from Appli because I use XIP and hence the Appli is running from OctoSPI in memory-mapped mode, preventing writes). I've done similar things with other MCUs and it worked perfectly fine.However, it looks like on the STM32N6, the contents of AXISRAM5 and 6 are not preserved across software resets. At least, checking the "magic" header in FSBL always produces randomly looking results that are

A few days ago I updated STM32CubeIDE from version 2.0.0 to 2.1.0. (Build: 27993_20260219_1630 (UTC))Now there is a problem. There seems to be no longer any such thing as a "partial" build. Example: My project consists of about 50 ".c" and ".h" files. In the old version, if I edited one of the ".c" files and did a build, only the file that was edited got re-compiled, followed by (as expected) linker and hex file generator. Now, in this version, every build re-compiles ALL the files, even if nothing was touched since the last build. This is time-consuming. How can I stop this and get it to re-compile only the changed files? (If it matters, target CPU is STM32H753BIT6; using FreeRTOS and FATFS.)

HiI'm create a project that sending data from RFID reader (RS232) to PC (via USB HID) as a keyboard.I using RS232 to TTL for STM32 can read data and using USB HID to send it to PC.My code is working but a character sending is slow, but when i remove delay, character is missing. Ex: data from RFID: 4F002F144EWhen I have 15ms delay, my PC receive all characterBut when remove 15ms, some character is miss.So I want to ask have anyway to speedup ?This is my loop: while (RingBuffer_Availabel(&ring)) { uint8_t data; RingBuffer_Pop(&ring, &data); if(data == '\r'){ send_enter(); break; } keyboardhid.MODIFIER = (data >= 'A' && data <= 'Z') ? 0x02 : 0x00; keyboardhid.KEYCODE1 = ascii_to_hid((char) data); USBD_HID_SendReport(&hUsbDeviceFS, (uint8_t*) &keyboardhid,sizeof(keyboardhid)); HAL_Delay(15); usb_ready = 0; keyboardhid.MODIFIER = 0x00; keyboardhid.KEYCODE1 = 0x00; USBD_HID_SendReport(&hUsbDevic

 Hello ST Community,We are working with STM32N657X0H3Q and configuring LTDC with internal AXI SRAM.Currently, we have configured the LTDC framebuffer at the following address:0x34200000First, we verified the LTDC functionality without using TouchGFX.Using the same framebuffer address (0x34200000), we manually filled the framebuffer with different colours and confirmed that the display works correctly. The panel turns on and displays the colour patterns properly. This confirms that the LTDC configuration and the memory region are functioning as expected.After enabling TouchGFX, the system starts initialization, but during debugging we observe that execution exits unexpectedly during the TouchGFX initialization phase.In TouchGFX, we have configured the framebuffer using the address method, pointing directly to the same memory location 0x34200000.The issue appears to occur around the following section of the TouchGFX initialization code:FrontendHeap& heap = FrontendHeap::getInsta

Heyho,I recently found that I'm not using ITCM RAM at all, then started to put heap and stack there.No problems so far.Then I copied some functions there, and all went well - until I found some strange behaviour:1..4 SAI RX DMA transfers running, circular modewhen all these transfers are complete for each SAI, a function is called to copy the complete DMA buffer from internal AXI SRAM into the big buffer in HyperRAMalso in this function a packet counter (a global u32 in DTCM) is incremented oncebut when this function is in ITCM, this packet counter increments for each SAI active, but there are no extra packets Further info:- instruction cache: in use- data cache: not used Is there any guideline what to put in ITCM, what are the limits, etcpp. ?

Hello everybody I'm building the device with power delivery sink function. I need the 21V (PPS). I done the configuration with STM32CubeMX and wrote some code in STM32CubeIDE. Unfortunately, after about 14 s of estabilishing connection, the source send hardware reset. What is the problem? In the attached file is the trase from STM32CubeMonitor-UCPD. I use STM32CubeIDE v. 2.1.1 and STM32CubeMX v. 6.17.0. void USBPD_DPM_SNK_EvaluateCapabilities(uint8_t PortNum, uint32_t *PtrRequestData, USBPD_CORE_PDO_Type_TypeDef *PtrPowerObjectType) { /* USER CODE BEGIN USBPD_DPM_SNK_EvaluateCapabilities */ //DPM_USER_DEBUG_TRACE(PortNum, "ADVICE: update USBPD_DPM_SNK_EvaluateCapabilities"); USBPD_SNKRDO_TypeDef rdo; rdo.d32=0U; rdo.ProgRDO.ObjectPosition=6U; rdo.ProgRDO.OutputVoltageIn20mV=1050U; //21V rdo.ProgRDO.OperatingCurrentIn50mAunits=60U; //3A rdo.ProgRDO.NoUSBSuspend=USBPD_ENABLE; rdo.ProgRDO.USBCommunicationsCapable=USBPD_ENABLE; *PtrPowerObjectType=USBPD_CORE_PDO_TYPE_APDO; *Ptr

Cube IDEIf i create / Import STM32 ProjectI only got these options to pick from and i have the feeling something is missing.  So i select:- STM32CubeIDE Empty Project which leads me to this:So i select my MCU: STM32G474RETx (for example).This leads me to this:All i can really do is creating an empty Project.This is wrong? I have the feeling it completely ignores which STM Chip i select. I would expect a question if i would want to use CMSIS, LL or HAL drivers.What i am left with is this:Notice that there is no Drivers folder at all and that i cannot select any of the given Libraries.To me this doesnt make any reasonable sense. Its almost like an empty C/C++ Project.The only way to get the drivers folder into my project is to go the route via CubeMX.Which also has its twirks.I sort of always have to select only the MCU on my board instead of the board itself.When i select the Board (in this particular case the NUCLEO-G474RE) then CubeMX will always export also the FreeRTOS CMS

I found what looks like a reproducible STM32CubeMX code generation bug for STM32H5 USBX device projects.I tested this on a fresh project, so this does not appear to be a migration issue from an older codebase.ProblemCubeMX generates these USBX init functions:MX_USBX_Init()MX_USBX_Device_Init()MX_USBX_Device_Stack_Init()However, the generated call flow only invokes:MX_USBX_Init()MX_USBX_Device_Init()and never calls MX_USBX_Device_Stack_Init().That is a problem because MX_USBX_Device_Stack_Init() contains the actual device stack setup:ux_device_stack_initialize(...)class registrationux_dcd_stm32_initialize(...)Without that function running, the USB peripheral can start and receive a reset interrupt, but USBX has not been given valid device framework pointers yet.Observed failureWhen USB_DRD_FS_IRQHandler() fires and the USB reset path runs, the code eventually reaches:HAL_PCD_ResetCallback()_ux_dcd_stm32_initialize_complete()_ux_utility_descriptor_parse(...)and h

hello, where can i download win11 STM virtual com port?  i install both VCP_V1.5.0_Setup_w7_x64_64bits and W8_x86_32bit all not working ! i din seeSTM Virtual Com port at device manager! only STM STLink visual com port appear ... 

Hi, I’m using a NUCLEO-144 (STM32H563ZIT6) development board with only the board USB STLINK-V3EC port connected. TRACE and DEBUG are enabled with Serial Wire in the configuration file, and printf is routed through ITM: int _write(int file, char *ptr, int len) { for (int i = 0; i < len; i++) { ITM_SendChar((*ptr++)); } return len; } SWV is enabled in the debug configuration, the core clock is 250 MHz, and the SWV window (port 0) shows output correctly in STM32CubeIDE.     When I switch to an external ST-LINK/V2 and connect NRST#15 / SWDIO#7 / SWCLK#9 / GND#20 / TARGET VCC#1 / VDD3.3 V#19, programming and debugging work, but the SWV window shows nothing in the STM32CubeIDE. The reason for using ST-LINK/V2 for SWV debugging is that on our product’s onboard MCU, only VDD, NRST, SWDIO, SWCLK, and GND are exposed.   Could anyone explain why SWV output does not appear with ST-LINK/V2? Thanks.    

Hi everyone,I’m currently working on a project using an STM32 Nucleo L476RG and a Velleman VMA302 Bluetooth module (HC-05 type), and I’m trying to send data over Bluetooth to my Mac.I configured USART1 at 9600 baud in STM32CubeIDE, and my code is continuously sending a simple message like "Hello". The module is powered and appears to be working (LED is blinking, pairing works with my Mac).On macOS, I can see the Bluetooth device and pair with it successfully. I also see the serial port (e.g. /dev/tty.HC-05-xxxx), but when I try to read data using the terminal command:screen /dev/tty.HC-05-xxxx 9600I don’t receive anything.I’ve already checked:TX/RX connections (crossed correctly)Baud rate (9600 on both sides) Bluetooth pairing (successful)What I’m trying to achieve:Send data from the STM32 to my Mac via Bluetooth and read it as a serial stream.My questions:Is there something specific to configure on macOS for Bluetooth serial communication?Could the issue come from the STM32 confi

Is this version do not copy touchgfx_core.a to project folder? ex) Middlewares\ST\touchgfx\lib\core\cortex_m4f\IAR8.xbecause I did generate code in touchGFX so automatelly remove the files in lib/core.and i can't build on IAR because .ipcf file generated from touchGFX desinger need touchgfx_core.a of path above.

I have a STM32WB55 board where I have two I2C connections:1. LSM6DSO IMU2. TCA9548A with downstream I2C to hall sensors The TCA9548A I2C multiplexer does not ACK when addressed. The firmware scans 0x70 (this should be correct already)–0x77 and gets no ACK. The LSM6DSO IMU on the same MCU works, so the MCU is fine; only the TCA9548A path fails. the A0, A1, A2 are all grounded, RESET pin is pulled up to VCC with the appropriate resistor, VCC and GND are wired correctly as well (~3.3V). TCA on PB8 (SCL) and PB9 (SDA) pins of the STM32WB55, each with 4.7k pull-up resistors to VCC. I even changed the PB8 PB9 pins to software I2C and back to hardwawre I2C, but no luck; I did even deeper diagnosis, and it is just that TCA9548A never ACKs at any address 0x70–0x77.  The data is collected via BLE, the exact steps since I obtained the PCB are as follows:1. Upgraded firmware on:> FUS: stm32cubewb-v1-24-0\\\\STM32Cube_FW_WB_V1.24.0\\\\Projects\\\\STM32WB_Copro_Wireless_B

Hi   I would like to check if it is necessary to call MX_RNG_Init() after the MCU exits STOP MODE to reconfigure the RNG?   BR Gilberto