Product forums

I'm in need to scan a bunch of contacts in a 4 rows, 8 column diode matrix configuration. PA0-PA7 are the inputs, PB12-PB15 the outputs. What I'm wondering about is the PA0-WKUP special function in contrary to the rest of inputs (PA1-PA7). Do I have to  care about this circumstance?

Hi Everyone, I one of our project i want to store the logs on NOR flash. I want to use Levelx to take care of NOR flash low level . But as per documents levelx can be used with Filesx, Is there is any way that i can use Levelx with Filex?

Hello, I have a problem reading VBat voltage with ADC3 and DMA in STM32H743VIT6 If i compile with CubeIDE 1.17.0 and FW 1.12.1 my program works as spected, but if i compile with last CubeIDE 2.1.1 and last FW 1.13.0 my program enter in a infinite loop related to DMA and never execute the while(1) loop. Can anybody help me? Thanks in advance. regards Jose. My program is very simple (see below):   in main.c: /* USER CODE BEGIN 2 */ HAL_ADC_Start_DMA(&hadc3, &VBat_ChAna, 2); /* USER CODE END 2 */ /* Infinite loop */ /* USER CODE BEGIN WHILE */ while (1) { Vbat = 4 * (((VBat_ChAna &0xffff) * 3300) / 0xFFFF);/* Convert the result from 16 bit value to the voltage dimension (mV unit) *//* Vref = 3.3 V.*/ /* USER CODE END WHILE */ /* USER CODE BEGIN 3 */ } /* USER CODE END 3 */   ADC3 configurationADC3 DMA configuration    

Hi community !I was working on a custom STM32 board as part of a robotics project. We started evaluating STM32H7 through the Nucleo boards, and now that we've confident with our chip selection, I designed a custom nucleo-type board, which can later be integrated on our main robot PCB. Since we didn't need any additional features, main focus was to have a board with just the STM32 chip (STM32H755ZIT6) along with the basic components needed. During the evaluation, I am not able to establish connection between ST-Link V3 MiniE, it shows "No target found". The board is powered by an 5V external supply, which powers the STM LDO, providing 3.3V for the chip. I tried playing around with the ST-Link config settings like Frequency, Mode, Reset Mode and Speed, but it doesn't help in fixing the error.Upon testing the ST-Link with the Nucleo board, it is able to connect to the STM32 onboard (so the ST-Link board is working fine). Upon reviewing my schematic, I realized that there were tw

I am working with the NUCLEO-WBA55CG board on a Zigbee_OnOff project, and I am facing an issue with the LED behavior.EnvironmentBoard: NUCLEO-WBA55CGMCU: STM32WBA55CGSTM32CubeMX version: 6.17.0Firmware package: STM32CubeWBAApplication type: Zigbee On/Off example / based projectThe project is able to run, and Zigbee side behavior appears to be partially working, but the LED is not blinking/toggling as expected.The problem is:button press has no visible impact on the LED, orZigbee On/Off action does not toggle/blink the LED as expectedIn my case, the issue looks more related to the GPIO / board mapping / callback path than to Zigbee network joining itself.

Hi, I am trying to configure the X-NUCLEO-GFX02Z1 display expansion board with the NUCLEO-F767ZI board. The LCD controller used is ST7789, and the interface is configured via FMC. During BSP initialization (BSP_LCD_Init), I am encountering an error: Return status: BSP_ERROR_COMPONENT_FAILURE The LCD ID read is not as expected (expected value: 0x858552U as per the BSP driver) However, if I bypass this failure and proceed: I am able to set the orientation using BSP_LCD_SetOrientation I can retrieve the orientation using BSP_LCD_GetOrientation successfully When attempting to draw on the display using:BSP_LCD_FillRGBRect(0, 0, (uint8_t*)buffer, 0, 0, 100, 100); there is no visible output on the screen. Could you please help identify: Possible reasons for incorrect LCD ID reading? A minimal working example to display a solid color on the screen using this setup? Any guidance on debugging steps or known issues with this board combination would be greatly appreciated. I am already

Hello everyone, I am currently working with the STM32G431CBT6 and designing a custom ESC using the DRV8301 gate driver. My application requires a total of 9 ADC channels: ADC1 → 4 channels ADC2 → 5 channels I configured both ADCs in independent mode with DMA (circular) using STM32CubeMX. Issue Description When I start ADC with DMA using the following function: void ADC_Start_System(void) { // 1. Calibration HAL_ADCEx_Calibration_Start(&hadc1, ADC_SINGLE_ENDED); HAL_ADCEx_Calibration_Start(&hadc2, ADC_SINGLE_ENDED); HAL_Delay(10); // 2. Start ADC1 if (HAL_ADC_Start_DMA(&hadc1, (uint32_t*)adc1_buffer, 4) != HAL_OK) Error_Handler(); // 3. Start ADC2 if (HAL_ADC_Start_DMA(&hadc2, (uint32_t*)adc2_buffer, 5) != HAL_OK) Error_Handler(); } Observed Behavior ADC1 + DMA works perfectly MCU gets stuck when calling: HAL_ADC_Start_DMA(&hadc2, (uint32_t*)adc2_buffer, 5); No error returned, but CPU halts inside HAL (likely waiting on a flag) What I Ha

hello community ! I'm facing issue wiht RS485 mod on USART3. Please find here a TL;DR of the issue, context, workaround and finaly request for answers. HARDWARE PLATFORMMCU: STM32U595USART: USART3 configured in RS485 modePROBLEM DESCRIPTION:During development of RS485 communication firmware for the STM32U595, we encountered anunexpected issue that challenged our understanding of the USART configuration: USART3 is configured with RS485 mode via HAL_RS485Ex_Init() which correctly sets the DEM (Driver Enable Mode) bit in CR3 for hardware-controlled driver enable:HAL_RS485Ex_Init(uart_handle, UART_DE_POLARITY_HIGH, 16, 16);This is the documented, correct approach for RS485 with automatic driver enable pin control.However, after extensive investigation and troubleshooting, we discovered that working RX/TX communication on this specific hardware appears to require ALSO calling:HAL_HalfDuplex_EnableTransmitter(); // - before transmission HAL_HalfDuplex_EnableReceiver(); // - in tran

 Now that that the CRA dates are near, why is there isn't a forum for regulatory compliance and CRA specific questions ?For example, which products STM offers now will not be CRA compliant ? This is important as those products would have to be revised or removed from the market.For example an STM32F072 would still meet requirement 1. as the main controller of the product with our without an RF/network connection (via UART/I2C etc..)  or 2. as a peripheral  connected to the main MPU (indirect) which connects with LAN or WIFI to outside world     

I have set up a STM32U5 nucleo board with an additional 8M of memory using an APS6404, following the example in AN5050. Initial setup was straightforward, but trying to create a ThreadX thread that uses an array in that section of memory as its stack isn't working -- local variables within the thread are fine, but function calls like printf("foo") or tx_thread_sleep(10) cause a hard fault.This is my first project using a STM32 microcontroller, and think I'm missing some fundamental understanding of how this is supposed to work -- any suggestions for what I've missed / what I should try?------------------ Details about what I'm trying ----------------- After following the steps given in AN5050, I updated my .ld file to create a corresponding memory section:MEMORY { RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 2496K SRAM4 (xrw) : ORIGIN = 0x28000000, LENGTH = 16K FLASH (rx) : ORIGIN = 0x08000000, LENGTH = 4096K OCTOSPI1 (xrw) : ORIGIN = 0x90000000, LENGTH = 8M } SECTIONS { .octospi1 :

Hi,I encountered this bug with a previous update and after searching I added the -z noexecstack parameter as given in a 2025 post.That cleared the problem at the time. The IDE has updated itself to V2.1.1 and the bug has re-appeared, despite the noexecstack parameter still being present? Full error:C:/ST/STM32CubeIDE_1.19.0/STM32CubeIDE/plugins/com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.14.3.rel1.win32_1.0.100.202602081740/tools/bin/../lib/gcc/arm-none-eabi/14.3.1/../../../../arm-none-eabi/bin/ld.exe: warning: C:/ST/STM32CubeIDE_1.19.0/STM32CubeIDE/plugins/com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.14.3.rel1.win32_1.0.100.202602081740/tools/bin/../lib/gcc/arm-none-eabi/14.3.1/thumb/v7e-m+dp/hard/crtn.o: missing .note.GNU-stack section implies executable stack C:/ST/STM32CubeIDE_1.19.0/STM32CubeIDE/plugins/com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.14.3.rel1.win32_1.0.100.202602081740/tools/bin/../lib/gcc/arm-none-eabi/14.3.1/../

Hi :  I’ve been working on planning an STM32WBA25 series product recently. Regarding the antenna design, I’ve been referencing ST’s development board “NUCLEO-WBA25CE1.” From the MCU pin, the signal goes through an IPD, then a matching network, and finally to the antenna.Currently, the IPD is a major challenge for me. Is it possible to replace the IPD with discrete components?

Hello,I am following AN4803 to simulate my board with an STM32MP151 with DDR3L memory, but there seems to be a problem with the IBIS model. These IBIS models have missing receiver voltage thresholds, which may affect analysis:IBIS File: C:\Users\...\IBIS\stm32mp151_153xaa_lfbga448_sm.ibsIBIS Model: MSD_D3RP3L_48Model does not have a [Receiver Thresholds] section.Only Vinh and Vinl thresholds are specified in the [Model Spec] section, and will be used for both AC and DC thresholds.Net: $9I75\DDR_DQ0Controller pin: U1.E21 (DDR_DQ0)Net: $9I75\DDR_DQ1Controller pin: U1.F21 (DDR_DQ1)Net: $9I75\DDR_DQ2Controller pin: U1.H21 (DDR_DQ2)Net: $9I75\DDR_DQ3Controller pin: U1.E20 (DDR_DQ3)Net: $9I75\DDR_DQ4Controller pin: U1.J21 (DDR_DQ4)Net: $9I75\DDR_DQ5Controller pin: U1.H20 (DDR_DQ5)Net: $9I75\DDR_DQ6Controller pin: U1.H22 (DDR_DQ6)Net: $9I75\DDR_DQ7Controller pin: U1.G19 (DDR_DQ7)Net: $9I75\DDR_DQ8Controller pin: U1.N22 (DDR_DQ8)Net: $9I75\DDR_DQ9Controller pin: U1.R21 (DDR_DQ9)Net: $9I75

Hello everyone,​I am designing a USB-C Sink-only application (5V/3A) using a standard STM32 MCU. My power architecture is as follows:​Input: USB-C Connector (VBUS, CC1, CC2).​Protection: TCPP01-M12 controlling an external N-channel MOSFET on the high side of VBUS.​Regulation: A 3.3V LDO is connected downstream of the MOSFET.​Supply: The 3.3V output from the LDO powers the MCU and the VCC/DB pins of the TCPP01-M12.​The Constraints:​The MCU's internal UCPD peripheral is not used (pins are allocated to other functions).​The system must rely entirely on the autonomous hardware logic of the TCPP01-M12 for the initial power-up.​The "Zero-VCC" Paradox:I have a technical question regarding the Dead Battery startup sequence. When the system is first connected to a charger and is completely unpowered:​VCC of the TCPP01-M12 is strictly 0V because the LDO hasn't started yet (the MOSFET is still open).​DB pin is also at 0V.​My Questions:​Internal Powering: How does the TCPP01-M12 energize its inter

Hello,A custom control board using an STM32G0C1 stopped working after some time.  Upon plugging into the board and stepping through the program using the CubeProgramer, it was discovered that the PC was cycling through the same addresses repeatedly and getting hung up.  These memory addresses were traced back to various HAL delay functions using addr2line.  Normal operation involves the board initializing and executing various state machines in a superloop (no RTOS), not getting stuck in a "boot loop" delay.  The entire flash memory was dumped to a .bin file and then an attempt was made to erase the flash using the CubeProgrammer with no luck and an error thrown.  No fuse bits or any kind of erasure protection was enabled during the programming of this board.  Then the CubeIDE was used to compile some code and start a debug session.  Somehow, the CubeIDE had no issue loading a program into flash.  This is where it gets interesting.&nbsp

Hello, This is a pretty straightforward bug report. For F767 Devices, when trying to configure dual boot mode over UART, the nDBOOT Option byte doesnt appear for Cubeprogrammer versions greater than v2.14 The typically workflow is1) uncheck nDBANK2) apply3) restart/reconnect4) nDBOOT option byte appears5) uncheck nDBOOT6) apply.This works on all versions of Cubeprogrammer using an STlink - good! But when executing this same sequence using the UART Bootloader on version v2.15 to v2.22, the nDBOOT option bytes never appears after step 3.  This regression is preventing us from using newer versions of CubeProgrammer. Best,Daniel   

Hello,I'm reading the article on "How to create an STM32N6 FSBL load and run" and have a couple of questions about DFU implementation on the STM32N6:1. Is DFU possible with the application as part of the FSBL?2. Is there an example on how to implement DFU for when the application is part of the FSBL and also where the application is separate from the FSBL?https://community.st.com/t5/stm32-mcus/how-to-create-an-stm32n6-fsbl-load-and-run/ta-p/768206I'm using the stm32n6570-dk eval board.Thanks!

Board:B-L4S5I-Iot-01A discovery kitMCU: STM32L4s5Vit6Hello , We have an application in which we are using the USB_OTG interface configured in host-only mode with the USB CDC class. Our requirement is to receive data at a rate of once per second through this interface. However, upon configuring the USB CDC class, the USB_OTG_FS global interrupt gets enabled automatically. In our application, we want to minimize the use of interrupts, as frequent interrupts may impact overall system performance. Therefore, we would prefer a polling-based approach, where data can be read only when required rather than being interrupt-driven. Could you please advise if it is possible to: Disable the USB_OTG_FS global interrupt, and Use the USB CDC host driver in a polling-based manner to retrieve data on demand? Any guidance or recommended approach for achieving this would be highly appreciated. Thank you.

Hi people,i have trouble with writing to the internal eeprom / flash. I can write values one time to the EEPROM and read it correct back from eeprom. When i write next time values to the eeprom and read them, the values changed but are incorrect. I tried many solutions, but know i am perplexed.//EEPROM Funktionen void EEPROM_Unlock(void) { while ((FLASH->SR & FLASH_SR_BSY) != 0) /* Wait for FLASH to be free */ { /* insert timeout test */ } if ((FLASH->PECR & FLASH_PECR_PELOCK) != 0) /* If PELOCK is locked */ { FLASH->PEKEYR = FLASH_PEKEY1; /* Unlock PELOCK */ FLASH->PEKEYR = FLASH_PEKEY2; } //FLASH->PECR = FLASH->PECR | (FLASH_PECR_ERRIE | FLASH_PECR_EOPIE); /* enable flash interrupts */ } // EEPROM lock void EEPROM_Lock(void) { while ((FLASH->SR & FLASH_SR_BSY) != 0) /* Wait for FLASH to be free */ { /* insert timeout test */ } //FLASH->PECR = FLASH->PECR & ~(FLASH_PECR_ERRIE | FLASH_PECR_EOPIE); /* disable flash interr

Hi all,I was super exited to test the new STUSB4531 IC on the EVAL-SCS006V1.The PPS support of the chip is the main reason to pass over from the STUSB4500. I have done a lot of test with 100W PPS enabled USB-C supply but without luck. i did not manage to get it working. Attached is a screenshot of an attempt to trigger 18V via different method:18V Fixed PDO: This was obviously not going to work as 18v is not a fixed PDO.18V APDO: This also was not supposed to work because the source's PDO does not fall into this rangePPS: a 16V-18V was asked and should have been asked first de to PPS_PRIORITY set to 1Things to note:1- All three options have also been tested individually without success2- Multiple current from 1.5A to 5A have been tested3- Source is offering  from 3.3V-21V@5A in PPS as you can see in the capture (also on the product label)4- A power reset (USB unplug/plug has been done between every test)5- ABOVE_5V flag has been tested on/off and behave as expected.6- Multipl

Hello,I'm developing the software to exchange secure data between a remote host (Linux-OS computer) and a electronic board based on STM32U5 MCU and STSAFE-A110 secure chip. I already implemented the board authentication and I chose to use the symmetric key encryption that the two hosts securely exchange data. For that the two hosts computes each on their own the shared secret after sharing their own public key. That's works fine!But I don't know what functions of stsafe library to use to encrypt and decrypt data using the computed secret key board-side.Could you please help me?Best regards,Alex

Title edited to note that this is not a genuine ST-Link11:19:26 : ST-LINK SN : 37FF71064E5734365279154311:19:26 : ST-LINK FW : V2J46S711:19:26 : Board : --11:19:26 : Voltage : 3.24V11:19:26 : Error: Unable to get core ID11:19:26 : Error: No STM32 target found! If your product embeds Debug Authentication, please perform a discovery using Debug Authentication I am using a LoRa module E77-900M22S that has incorporated a STM32WLE5CCU6. Also i am using a ST-Link V2 mini connected to program the micro. I have connected SWDIO and SWCLK properly and the module has 3.24V so the problem its not the connections. I dont know why it doesnt detect the MCU.

Hi ST Support Team,I am using MXCube for STM32U5A5VJ. I have enabled the RTC, and cube generates the following Init Function. In this way, everytime I restart the controller, the RTC date is gonna be overwritten. In practice, I would like to have the bracket at line 9 down in line 21. Thank you for your support.Best Regards, Gianmarco Cerutti void MX_RTC_Init(void) { ... /** Initialize RTC and set the Time and Date */ if(LL_RTC_BKP_GetRegister(RTC,LL_RTC_BKP_DR0) != 0x32F2){ LL_RTC_BKP_SetRegister(RTC,LL_RTC_BKP_DR0,0x32F2); } RTC_TimeStruct.Hours = 0x0; RTC_TimeStruct.Minutes = 0x0; RTC_TimeStruct.Seconds = 0x0; LL_RTC_TIME_Init(RTC, LL_RTC_FORMAT_BCD, &RTC_TimeStruct); RTC_DateStruct.WeekDay = LL_RTC_WEEKDAY_MONDAY; RTC_DateStruct.Month = LL_RTC_MONTH_FEBRUARY; RTC_DateStruct.Day = 0x11; RTC_DateStruct.Year = 0x25; LL_RTC_DATE_Init(RTC, LL_RTC_FORMAT_BCD, &RTC_DateStruct); ... } 

Hi,I have a working 3-phase STPM33/34 energy meter. Voltage is correct. The current is wrong by a fixed factor of approximately 60.Setup:CT: 80A primary / 5A secondaryBurden resistor: 6.8 ΩGain: x2Mode: UART with auto-latchExpected reading: 0.6A → Actual reading: 0.01AWhy I think this is a calibration/formula issue and not a hardware fault:The error is consistent and proportional (not random)Voltage on same chip reads correctlyCRC passes on every frameNo register corruption detectedMy question to the community:Has anyone seen a x60 error factor on STPM33/34 current channels? Which misconfigured parameter — CT ratio in firmware, KI calibration register, Kint constant, or gain setting — would produce exactly this ratio?

We are currently experiencing issues with the LPS28DFW.We observe pressure values dropping to 0 or even negative ranges (e.g., around -400 mPa), as well as unexpectedly high values (up to approximately 1200 mPa), while the expected range should be around 950 mPa. We are also seeing abnormal temperature outputs, including unrealistically low values (e.g., around -400°C).this happens when the sensor is in contact only with air and also when it is in contact only with water. When the sensors from the field they are brought back in the lab the sensors seem to recover on their own and return to normal readings.