STM32CubeProgrammer (MCUs)

Hi!I'm having trouble connecting to an STLINK ISOL via STM32CubeProgrammer. The STLINK is authentic, I purchased it from digikey. The programmer is detected under Device Manager. The programmer's LED remains static red at all times. Sometimes STM32CubeProgrammer detects an STLINK device, but when I click connect it gives 10:40:01 : STM32CubeProgrammer API v2.21.0 | Windows-64Bits10:40:09 : UR connection mode is defined with the HWrst reset mode10:40:14 : ST-LINK error (DEV_USB_COMM_ERR)10:40:14 : Error: Problem occured while trying to connect Changing to software reset10:41:23 : UR connection mode is defined with the SWrst reset mode10:41:28 : ST-LINK error (DEV_USB_COMM_ERR)10:41:28 : Error: Problem occured while trying to connect And then, when I click refresh interfaces the STLINK interface disappears.Disconnecting from USB and reconnecting, when I try to update firmware and open device in update mode it givesError connecting to device ST-LINK/V2 (error 0x21

Good dayI have a Custom PCB with a STM32F217ZG populated.When trying to program with the STM32CubeIDE I get a No STM32 target found error.Then I tried with the STM32CubeProgrammer and get the following:20:27:26 : UR connection mode is defined with the HWrst reset mode20:27:26 : ST-LINK SN : 0670FF36344550304303404220:27:26 : ST-LINK FW : V2J46M3220:27:26 : Board : NUCLEO-F207ZG20:27:26 : Voltage : 3.26V20:27:26 : Error: Unable to get core ID20:27:26 : Error: No STM32 target found! If your product embeds Debug Authentication, please perform a discovery using Debug Authentication In STM32CubeProgrammer I have tried the Modes in Normal, PowerDown and Under Reset. In Reset Mode i have tried Hardware Reset and Software Reset.When measuring with an scope on Pins 105, 109 and 25(NRST) I do see the Reset, Clock Pulses and something like Data Pulses but still get the error.Can someone Please help me with this error. 

Hi. This is a Linux problem, because with the same parameters it works on Windows. I tested with v2.21.0.I am trying to use the UART connection mode with these parameters:RTS: HighDTR: Negative pulseI can see, with a voltmeter, that the RTS/DTR signals (MCU side) change states.This is what the log shows:17:32:36:714 : RTS High 17:32:36:714 : DTR Negative pulse with delay 200 17:32:36:935 : Serial Port ttyUSB0 is successfully opened. 17:32:36:935 : Port configuration: parity = even, baudrate = 115200, data-bit = 8, stop-bit = 1,0, flow-control = off 17:32:36:935 : No Init bits value is : 0 17:32:36:935 : Sending init command: 17:32:36:936 : #byte 0x7F sent successfully to target 17:32:38:937 : Wait ends after 1 loop, dataready = 0, delay = 2001 17:32:38:937 : Timeout error occured while waiting for acknowledgement. 17:32:38:937 : No response from target received 17:32:38:937 : Retrying UART init connection... 17:32:38:937 : #byte 0x7F sent successfully to target 17:32:39:037 : Wait en

Hi, I’m working with an STM32C011F6P6TR device, and after programming it via SWD using STM32CubeProgrammer, the MCU became completely stuck in resetSymptoms- After programming an ELF file through STCubeProgrammer, the MCU no longer runs.- The NRST pin stays LOW permanently, even after power cycling.- I cannot reconnect with STM32CubeProgrammer, even using “Connect Under Reset” mode.- The tool returns: DEV_HELD_UNDER_RESET.- Removing power, disconnecting ST-LINK, reconnecting, and trying again does not help.Before programming, everything worked normally and I was able to connect and flash multiple times (Using VS-CODE and ST extension).Questions:What could cause the MCU to remain stuck in reset after flashing?Is it possible that option bytes got corrupted or misconfigured during programming?Is there any way to force a full chip erase or restore factory option bytes when the device cannot be accessed through SWD?Has anyone encountered a similar issue with the STM32C0 series where NR

Hi ST team,I am using STM32U5G9J-DK2 board and the verson of STM32CubeProgrammer is v2.21.0.I tried to reset MCU to factory settings (in option byte tab) using STM32CubeProgrammer but failed.After that, STM32CubeProgrammer could no longer connect to the board with below log.14:23:14 : STM32CubeProgrammer API v2.21.0 | Windows-64Bits 14:23:25:813 : Selected loader: C:\Program Files\STMicroelectronics\STM32Cube\STM32CubeProgrammer\bin/ExternalLoader/MX66UW1G45G_STM32H7S78-DK.stldr 14:23:25:814 : External loader C:\Program Files\STMicroelectronics\STM32Cube\STM32CubeProgrammer\bin/ExternalLoader/MX66UW1G45G_STM32H7S78-DK.stldr is unloaded 14:23:25:814 : Selected loader: C:\Program Files\STMicroelectronics\STM32Cube\STM32CubeProgrammer\bin/ExternalLoader/MX66UW1G45G_STM32H7S78-DK.stldr 14:23:25:814 : External loader C:\Program Files\STMicroelectronics\STM32Cube\STM32CubeProgrammer\bin/ExternalLoader/MX66UW1G45G_STM32H7S78-DK.stldr is loaded 14:23:28:572 : UR connection mode

After update to the latest Cubu Programmer v2.20 a get this error when uploading the firmware:11:29:37 : Opening and parsing file: 1000BASET1-MC-ETH v1.3.hex11:29:37 : Memory Programming ...11:29:37 : File : 1000BASET1-MC-ETH v1.3.hex11:29:37 : Size : 56.78 KB11:29:37 : Address : 0x0800000011:29:37 : Erasing memory corresponding to segment 0:11:29:37 : Erasing internal memory sectors [0 28]11:29:38 : Erasing memory corresponding to segment 1:11:29:38 : Error: Sector size: 0x00000008 Bytes is out of range11:29:38 : Error: failed to erase memoryIn previous version (2.19) it works correctly.MCU: STM32G473RBT6Thanks

Hi All,I am choose the STM32U585VIT6 MPU to design our customized board. Firstly I design a simple basic connection to program it and only blink the LED for confirmation our initially circuit. Also I following the  AN5373 document.When I flash the code getting the error belowError in initializing ST-LINK device.Reason : No device found on target. Find the attached schematic.Please guide me what is the issue and how to resolve it.

Hello,I try to connect the STM32CubeProgrammer (v2.20.0) to the STM32L496 that has enabled Read-Out Protection, but it is not possible. I need just to do the full chip erase and download new firmware.I remember that STM32CubeProgrammer (v2.0.0) allowed to erase the whole ship and connect to MCU successfully. Unfortunately, this old version doesn't work on Windows 11.Please help me to execute these two steps (full chip erase and connect) for the STM32L496 that has Read-Out Protection enabled.Thanks,Alex

 Hello ST Community,I’m developing a custom external loader for STM32CubeProgrammer where the STM32 acts as a bridge to program an external MCU (not external flash). The STM32 uses UART5 as a debug port and also as the communication interface to the external MCU.In testing, I see CubeProgrammer calling Write() repeatedly with non‑sector‑aligned sizes and addresses that don’t start at sector boundaries. Sample output from my loader:Starting... Address: 0x90000000 Size: 0x0003C700 Size is not sector aligned:0x0003C700 Address: 0x9003C700 Size: 0x0003C700 Size is not sector aligned:0x0003C700 Address is not start of sector:0x9003C700 ... Address: 0x901E3800 Size: 0x00018E00 Size is not sector aligned:0x00018E00 Address is not start of sector:0x901E3800 Address: 0x901FC600 Size: 0x00018E60 Size is not sector aligned:0x00018E60 Address is not start of sector:0x901FC600This looks like CubeProgrammer is splitting the image into chunks (e.g., 0x3C700, then smaller fragments near the end

STM32CubeProgrammer CLI: v2.21.0STM32H573I-DKST-Link (part of DK)Experimenting with lifecycle states, I occasionally (maybe 1 in 3) get an mbedtls error when performing regression. This is with Trustzone enabled, using a leaf certificate. Sometimes running the command a second time will cause it to pass (as in the log below), sometimes the board needs to be reset in order to pass. This also happens using the regression.sh script and keys/certificates bundled with STM32CubeH5/Projects/STM32H573I-DK/ROT_Provisioning.A snippet of the error is below, and I've attached a log with the full command that failed, followed straight after by the same command that then passes.```STM32_Programmer_CLI -c port=SWD per=a key=Keys/leaf_priv.pem cert=Certificates/cert_leaf_chain.b64 debugauth=1....Certificates/cert_leaf_chain.b64load_trust_chain : 200 : error : sdm : Error calling mbedtls_pk_load_file()Error:Debug Authentication Failed``` 

Where can I find the meaning of the returns from connectDfuBootloader? I'm getting -16 back and would like to know what it means.  

Hello ST community I'm trying to install SetupSTM32CubeProgrammer-2.16.0.linux in docker But getting error like below root@1694a12cc06d:/home/app/en.stm32cubeprg-lin-v2-16-0# ./SetupSTM32CubeProgrammer-2.16.0.linux./SetupSTM32CubeProgrammer-2.16.0.linux/home/app/en.stm32cubeprg-lin-v2-16-0chdir /home/app/en.stm32cubeprg-lin-v2-16-0/.current dir /home/app/en.stm32cubeprg-lin-v2-16-0SEVERE: com.izforge.izpack.api.exception.IzPackException: Console implementation not found for panel: com.st.CustomPanels.AnalyticsPanels Thanks in advance.

Following the directions in https://docs.zephyrproject.org/latest/boards/st/stm32n6570_dk/doc/index.html images signed using STM32_SigningTool_CLI version 2.20.0 run OK on the board.However, after upgrading to STM32CubeProgrammer 2.21.0, images no longer run (I believe the signature check is now failing on the device).Reverting back to 2.20.0 fixes the signing issue on Windows, macOS, and Linux for the STM32N6570-DK board.However, this is a blocker for developers using the Nucleo N657X0-Q board on Windows & Ubuntu because 2.20.0 has a bug which causes west flash to fail for this board on both Windows & Ubuntu. This west flash bug is fixed for Windows & Ubuntu in 2.21.0, but we can't use that version due to the signing issue in 2.21.0.

STM32CubeProgrammer v2.21.0 I implement Open Bootloader middleware to communicate USART protocol over USB CDC on Mbed OS 6 I found when I open STM32CubeProgrammer and click Erasing & Programming tab first time, program will freeze. But after first time does not freeze. After Click Erasing & Programming tab. Program send Get ID for 100 packets per sec Graph with 1 Sec interval, Get ID packets (I only filter 0x02) Graph with 100ms interval, Get ID packets Before Click, 2 Get ID per 1 sec After Click, 513 Get ID packets with no delay I also try with FTDI and result is mostly same Graph with 100ms interval, Get ID packets 6-7 packet per 100ms And also 513 packets I also found when before and after buck send. Program change baud rate to 9600 and switch back to 115200 (I use 115200)

QuestionI implemented a custom bootloader with USB DFU. It worked without issues on my Windows 10 computer. After switching to a Windows 11 machine, however, my DFU device is no longer recognized.What I’ve triedConnected the device again on Windows 10. It appears in Device Manager, plays the connection/disconnection sound, and read/write operations work with STM32CubeProgrammer. This confirms that neither the bootloader nor the USB cable is the root cause.Installed STM32CubeProgrammer on Windows 11, but it reports “No DFU detected.”On Windows 11, there is absolutely no activity related to the DFU device in Device Manager. Other DFU devices, such as the STLink, are listed and working correctly.RequestWhat steps can I take to get my DFU bootloader detected on Windows 11?

Hello everyone,I’m working on a project based on the STM32H563RIT, and I’m encountering an issue related to SWV trace when using STM32CubeProgrammer.The firmware runs correctly in both debug mode and standalone. The problem appears only when I connect to the target with STM32CubeProgrammer and attempt to read the SWV trace. When I do so, the MCU freezes during the initialization phase, specifically inside MX_GPDMA1_Init(), where the DMA used for SPI communication is configured.As part of the investigation, I also provided the main.c file, where the full list of initialized peripherals and their initialization order can be seen.For testing, I tried swapping the initialization order between MX_GPDMA1_Init() and MX_SPI2_Init(). With this modification, the firmware starts even while connected to CubeProgrammer, but later freezes when SPI is used in DMA mode, since SPI ends up being initialized before the DMA.My questions are:Why does connecting with CubeProgrammer and reading SWV cause the

We encountered an issue with the STM32L562E-DK board when attempting to clear TZEN by changing the RDP level from 0 to 1 and then back to 0. Using the STM32CubeProgrammer, we can connect to the device via ST-LINK. The memory blank check indicates flash is empty, but the first byte verification fails during download. Additionally, the PC register value is 0xFFFF_FFFE, and the SP register value is 0xFFFF_FFFC.Could you please provide guidance on resolving this issue?

So i was failing to properly flash my STM32N6 because in version STM32_SigningTool_CLI 2.21.  I think it's because it doesn't align the payload.  So when i flashed the board made with 2.21 it didn't recognize it and didn't load. In version 2.20 this doesn't happen.  I don't know if this is a bug or a failed configuration.  But i used the same command for both of them and it worked in version 2.20. 

Dear ST community,I have a custom board with small external NOR flash MX25U1632F connected to STM32H573. I have written a custom external flash loader for this device. The loader works, for example, from stm32cubeprogrammer gui, and can read the external flash memory, and erase sectors.My problem is during secure manager provisioning. I have built a sfi package using the provisioning.py --sfi-gen script provided in the x-cube-sec-m-h5-v2-1-0.zip.During provisioning, initially, the device is in OB_PROD_STATE_OPEN state. Here, the sector erases complete successfully. With -vb=3 logging enable in STM32_Programmer_CLI:2025-11-26 16:42:28,808 - DEBUG - Init flashloader...2025-11-26 16:42:28,809 - DEBUG - halt ap 12025-11-26 16:42:28,811 - DEBUG - w ap 1 reg 0 R0 0x000000012025-11-26 16:42:28,812 - DEBUG - w ap 1 reg 1 R1 0x000000002025-11-26 16:42:28,813 - DEBUG - w ap 1 reg 2 R2 0x000000002025-11-26 16:42:28,814 - DEBUG - w ap 1 reg 3 R3 0x000000002025-11-26 16:42:28,815 - D

I'm trying to install ./SetupSTM32CubeProgrammer-2.21.0.linux -q But it just keeps failing or waiting for user response.  Its not quiet if it asks for interaction.  Moreover I have a tried a varfile but it expects a specific format (XML? Schema?)I can't find any documentation on how to install this without user interaction.  Can anyone help or point me to the documentation? Thank you 

when trying to program our hex file in the microcontroller with the actual version 2.21 of programmer, I get following error: failed to download Sector[0]. in hex file the sector 0 starting from address 0x0 is used. wondering, that this could not be programmed with stm tools. sw tool hw tool result stm programmer st-link error stm programmer j-link error j-flash pro j-link error j-flash light j-link good in my opinion, the definition file for programmer isn't correct. the sector 0 is missing. why? shall it be corrected? thanks for fast help. Stefan

Hello,I have a custom STM32H533RET6 board that I can't program.  Following advice found on the ST website I am trying to use CubeProgrammer to mass erase the flash, however it is failing to do so.I am using an STLINK-V3MINIE with Mode: Under reset and Reset Mode: Hardware resetNOTE: the guide says to use software reset, but upon connecting CubeProgrammer switches this to hardware reset. I don't understand why? I can connect to the the board and the mcu type is correctly identifiedHere is the initial connection log:11:47:25 : STM32CubeProgrammer API v2.21.0 | Windows-64Bits11:47:40:870 : UR connection mode is defined with the HWrst reset mode11:47:40:878 : ST-LINK SN : 003A003C323451093630353211:47:40:879 : ST-LINK FW : V3J16M811:47:40:879 : Board : STLINK-V3MINIE11:47:40:879 : Voltage : 2.39V11:47:40:879 : Connection to AP 0 requested and failed, Connection established with AP 111:47:40:880 : SWD freq : 8000 KHz11:47:40:880 : Connect mode: Under Reset11:47:40:880 : Reset mode

I am logged into my STM user account.I get to the download page for STM32CubeCLT (https://www.st.com/en/development-tools/stm32cubeclt.html#get-software) and I try to download the latest version for Windows.A dialog pops up with 'Log in to MyST', 'Create a MyST Account' and down in the corner 'Download as a Guest'.I click 'Log in to MyST' and the dialog just closes and no download starts. 

Hi, I was using CubeProgrammer version 2.8 to program the STM32L552 microcontroller, using the ‘STM32_Programmer_CLI’ file. After updating to version 2.14, I have noticed a significantly longer programming time. For example, before the update, it took 1.8 seconds to program approximately 20kB; after the update, it takes over 10 seconds. My programming settings are as follows:call "%programmer%" -c port=swd freq=1000 -w "%hexfile%" -vI have tried different SWD frequencies, 3300 and 24000, but no luck. Does anyone else have this issue and know the solution?I also have one more question - if a verification error occurs, why does STM32_Programmer_CLI return 0 as the exit code? Shouldn’t it be a different value that indicates an error?Best regards,