STM32 MCUs Products

Hi, Greetings!! We have implemented internal DAC (DAC1 and DAC2 both) in STM32F446RE chip. Both the DAC gives identical analog voltage from the range of 0-1V corresponding to the measurement reading of 0-100.  This analog output voltage is connected to the data logger through DAC1, whereas the DAC2 is not connected anywhere.  During the testing (After 5 days after the device is powered on and kept under observation) it has been observed that the DAC1 output stopped working. When compared with the DAC2 output (which is not connected to data logger or any other system) is working as expected.  This has happened multiple times on multiple devices. Any suggestion why this is happening and what precautions are required while handling the DAC signal.  No protection circuit is implemented at the DAC output. DAC output is directly connected to the data logger and other interconnection system( another MCU which is reading this DAC

Hi, I am using the STM32F429ZI board. I enabled the hardware-independent watchdog timer using STM32CubeProgrammer option bytes. However, there are no errors or faults in my project—I have only enabled the GPIO and UART peripherals. But after enabling the hardware watchdog and performing a power-on reset, my board keeps resetting continuously. On the other hand, when I enabled the software-independent watchdog timer using firmware, the board did not reset. Why is this issue occurring only with the hardware watchdog timer? I also tried refreshing the IWDG after enabling the hardware-independent watchdog timer, but it still keeps resetting my board.

Hello STM support, It seems that the depiction of the TIM15 TPCLK on the clock configuration tab of STM32Cube incorrectly shows TPCLK as 2x16MHz=32MHz when should be 16MHz, same as PCLK.I found this issue after setting TIM15 as shown in the attached screenshot. The resulting clock configuration should trigger the IRQ every 1 second, however I measured 2 seconds between each trigger. Recalculating the prescaler and counter period for a 16MHz clock yields the correct behavior.Figure 11 in RM0503 also seems to show that t

Hello, I use 25 MHz quarz (XRCGB25M000FAN00R0) together with 5.6 pF load capacitors. When I configure clock to 170MHz my program stuck here: while (READ_BIT(RCC->CR, RCC_CR_PLLRDY) == 0U). When I configure clock to 168.75 MHz, then everything work corectly.  Can someone explain how this problem could be solved? Thank you for answers. Best regards   Configuration for 168.75MHz clock:   void SystemClock_Config(void) { RCC_OscInitTypeDef RCC_OscInitStruct = {0}; RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; /** Configure the main internal regulator output voltage */ HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1_BOOST); /** Initializes the RCC Oscillators according to the specified parameters * in the RCC_OscInitTypeDef structure. */ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState = RCC_HSE

Hi,I am trying to program STM32F030C8T6 with STM32CubeIDE. When I try to upload the code, it says the download was successful but then it fails to halt the device. I have tried setting "Reset behaviour" to "None" as other posts have suggested, but that only results to me getting another error with an unknown reason and it telling me to check power and cabling. I have done so, 5 times already and I have measured every part of the circuit with my multimeter. Everything is connected. What I find weird is that a week ago it was working fine. Only as I expanded the firmware by an order of magnitude, it stopped working.  What could I do to get rid of this error?Best regards,Juhani -------------------------------------------------------------------STM32CubeProgrammer v2.14.0 -------------------------------------------------------------------   

I have a question regarding GPIO settings for the STM32H743.Does anyone have detailed documentation on the speed of the GPIOx_OSPEEDR register?I would like to know the criteria for using low speed or very high speed. 

I've purchased an STM32H7R7L8HxH development board, but I'm not sure how to download a binary file to the external flash.   The external flash consists of two W25Q128 chips. The Chip Select (CS) lines of both chips are connected to XSPI1_CS PO0. The Clock (CLK) lines of both chips are connected to XSPI1_CLK PO4. The data lines (D0 - D3) of the first chip are connected to XSPI1_DQ0(PP0) to XSPI1_DQ3(PP3), while the data lines (D0 - D3) of the second chip are connected to XSPI1_DQ4(PP4) to XSPI1_DQ7(PP7).   I'm at a loss as to how to solve this issue. I've discovered that it's possible to create an external flash download project in CubeIDE, but I don't know the specific steps. In my area, many people are unfamiliar with external flash downloading.   Could you please help me? If it simplifies the process, you can focus on using just the first W25Q128 chip and ignore the second on

Hello ST Community,I'm working on an application using the STM32F103C8T6 microcontroller that implements a Sliding Mode Observer (SMO) and Park/Clarke transformations. I'm facing significant performance challenges due to the computational overhead of the floating-point trigonometric functions  atan2f.My system requires a 50us loop execution time, but the SMO alone is taking approximately 20us, largely due to these trigonometric functions. I need to optimize this to meet my timing requirements.Here's a breakdown of my current implementation:MCU: STM32F103C8T6Application: SMO and Park/Clarke transformationsProblem: Excessive execution time of  and atan2f within a 50us loop.Current Performance: SMO takes ~20us.Compiler: stm32cubeideOptimization Flags: O2Clock Frequency:

Hello,I configured QSPI and MDMA in CubeMx and generated the initialization code. I merged the flash demo code (QSPI_ReadWriteDual_DMA), available for the H743 evaluation board, into my project.Regarding the QSPI waveform I'm puzzled whats going on during the flash read and programming sequence. This is the QSPI transmit / flash program (command 0x32) waveform:This is the QSPI receive / flash page read (command 0x6b) waveform:

Hello,I am currently working on a project using the STM32 series and have two specific questions regarding MCU selection::keycap_1: Are there any STM32 MCUs that support 5V logic levels for both input and output?Most STM32 MCUs operate at 3.3V logic levels, but I need an MCU that can directly interface with 5V logic without additional level shifters.:keycap_2: Do any STM32 MCUs provide a built-in feature to trigger ADC conversion during the ON-time of a PWM cycle?I am looking for an MCU where the ADC conversion can be automatically synchronized with the PWM signal, preferably triggering at a specific percentage of the ON-time (e.g., 90% of the ON duration).If there are any STM32 MCUs that support these features, I would appreciate any recommendations or relevant documentation.Thank you in advance!

Hello all,I have a project with ethernet on custom STM32H743 board, ethernet works as expected but only with SYSCLK <= 300 MHz, for sysclk > 300 MHz I get "transmit buffer unavailable" messages.Even when reducing the HCLK, AXI, AHB bus clock, the system still does not work. It looks like the only problem is the sysclk frequency. I googled a lot but did not find any explanation, it is related to the DMA transmit buffer but why is this dependent on the SYSCLK.Here's a working clock configuration: Regards.Matthias 

Hi everyone: I'm trying to make an application over the NUCLEO U575zi-q, where some GPIO port pins (in this case, GPIO port E) are triggered in a synchronous way with the DAC output, and the values are held in two arrays, one for the DAC values and the other for the GPIOs pins. GPDMA is triggered usign a timer (TIM2).I've started with the signal generation example, and made an example where both signals are sent in an apparently synchronous way, which is held in this repo:https://github.com/osellaesteban/STM32U575ZIT6Q-gpio-dac-dma/tree/mainBased on that, I started modellying my particular application, I've made good advances, but I'm experiencing a very strange errors, since the DAC starts some samples before the GPIO, and after some iterations, the debuger runs to a HardFault_Handler associated

Hello, I'm trying to use the RTC of my NUCLEO-L476RG including the sub-seconds feature. I've activated the RTC clock source in the .ioc and configured LSE as clock source (32.768KHz). I've set up an initial value to the RTC and I'm reading it out every 100ms:   void Set_RTC_Time(void) { RTC_TimeTypeDef sTime = {0}; RTC_DateTypeDef sDate = {0}; sTime.Hours = 10; sTime.Minutes = 30; sTime.Seconds = 0; sDate.WeekDay = RTC_WEEKDAY_THURSDAY; sDate.Month = RTC_MONTH_OCTOBER; sDate.Date = 3; sDate.Year = 24; HAL_RTC_SetTime(&hrtc, &sTime, RTC_FORMAT_BIN); HAL_RTC_SetDate(&hrtc, &sDate, RTC_FORMAT_BIN); } // Function to get RTC time with sub-second precision void Get_RTC_Time_With_Milliseconds(void) { RTC_TimeTypeDef sTime = {0}; RTC_DateTypeDef sDate = {0}; uint32_t subsecond = 0; float fraction = 0; // Retrieve current RTC time and date HAL_RTC_GetTime(&hrtc, &sT

when I connect to pixhawk with stm32, I want the channel I want to move according to the data coming from the stick. /* USER CODE BEGIN Header */ /** ****************************************************************************** * @file : main.c * @brief : Main program body ****************************************************************************** * @attention * * Copyright (c) 2025 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that can be found in the LICENSE file * in the root directory of this software component. * If no LICENSE file comes with this software, it is provided AS-IS. * ****************************************************************************** */ /* USER CODE END Header */ /* Includes ------------------------------------------------------------------*/ #include "main.h" /* Private includes -------------------------------------------------------

Hi all, attempting to write data to a specific address in flash bank 1 and calculate the CRC. Using three different CRC methods: flash CRC, software CRC, and hardware CRC, but getting three different values for the same data. The code is attached below. Additionally, the read and write operations are functioning correctly. Could anyone help identify what the issue might be?#include"flash_api.h" #include "crc.h" uint32_t SW_crc32_Calcul(const uint32_t *buf, size_t len, uint32_t BurstSize); uint32_t data[70] = { 0x11111111, 0x22222222, 0x33333333, 0x44444444, 0x55555555, 0x66666666, 0x77777777, 0x88888888, 0x11111111, 0x22222222, 0x33333333, 0x44444444, 0x55555555, 0x66666666, 0x77777777, 0x88888888, 0x11111111, 0x22222222, 0x33333333, 0x44444444, 0x55555555, 0x66666666, 0x77777777, 0x88888888, 0x11111111, 0x22222222, 0x33333333, 0x44444444, 0x55555555, 0x66666666, 0x77777777, 0x88888888, 0x11111111, 0x22222

I am working on the stm32G0B1KBUX, i am using FDCAN on it. FDCAN is working fine and i can tranmsit and receive messages.The problem arises when i try to erase a page and try to write data in the flash. I have reserved last page for configurations. My application just uses first 20 pages, rest of the pages are unused. I am using page 63 for my configurations. When i try to erase the page it never gets successful, trying to debug the issue it always get timeout because of the FLASH_SR_CFGBSY.Interesting part is that if i remove the FDCAN initialization from my application everything works fine. I have made a simple project with just FDCAN and flash erase and write application. no CAN message transmission and receiving. it still fails and timeout.What could be the relation of the FDCAN with flash, i don't get it?Any help or insight can be very helpful. following is my FDCAN initialization and flash erase program, if i comment fdcanInit(500); every

Hi,I am looking to synchronize the HR timers (HRTIM) on the STM32H755 with the other general-purpose timers (TIM). Is this possible? The documentation alludes to it, but I don't see example implementation or how to do it in the application notes. I see that it is possible to synchronize the various general-purpose timers using internal triggers. Can the same internal triggers be shared with the HR timer?Thanks,Alan

Hello, I'm trying to enable the stop2 mode and using the analog comparators on STM32L5.It seems that no interrupt is fired when turning the voltage in input+ at a higher leveln than input-. The same code work fine, when entering stop1 instead of stop2.There's also no problem when running the RTC or waking up via GPIO event if the compartor is not initilized.Hardware:Nucleo STM32L5 Nucleo-144 board (MB1361)Current is measured on Header IDDSoftware:Clocks: LSI as source for RTC and MSI @ 1 MHz as system clock (MSI is also configured as wakup source clock)GPIOs: All pins are configured as analog inputs without pullComparator is configured using PB2 as input+ and PB1 as input-How can I use the comperator in stop2 mode?Thanks for help,Sven

Hi everyone,Recently started working on STM32C011J4M3 micro. I'm trying to set PF2-NRST pin as a GPIO. but when I configure it from cube MX as GPIO PIN always reamins in High state that is a 3.28v and i'm unable to toggle the pin or perform any other operation. int main(void){/* USER CODE BEGIN 1 */// SET_BIT(FLASH->OPTR,FLASH_OPTR_NRST_MODE_1);WRITE_REG(FLASH->OPTR,0x2UL << 027U); // Even tried stting nrst mode2./* USER CODE END 1 */ /* MCU Configuration--------------------------------------------------------*/ /* Reset of all peripherals, Initializes the Flash interface and the Systick. */HAL_Init(); /* USER CODE

Does the current consumption of the micro stm32L151 in stand by mode with the RTC enabled vary with the supply voltage?From my tests I find that by powering the micro with 3.1 V I have a current consumption of about 4 microA while if I power it with 3.3V the current is 400microA

Hi,I am using FMAC for STM32G4.I can't find an example FMAC_IIR_DMAToDMA.I tried to configure a DMA instance for Input but the example was not working.1- Besides the DMA instance, should I use 2 more DMA instances, one for input and one for preload?2- as described in the stm32g4xx_hal_fmac.h, hdmaPreload refers to X1, X2, and Y. Then hdmaIn, should refer to the input buffer that we want to filter?3- As far as I understand, X1, X2, Y are set/loaded during configuration phase, which is HALO_FMAC_FilterConfig/DMA. Is that correct? if yes then, preload should refer to the input buffer.Please find here the used DMA configuration for input://InterruptHAL_NVIC_SetPriority(DMA1_Channel3_IRQn, 0, 0);HAL_NVIC_EnableIRQ(DMA1_Channel3_IRQn);

Hi, We are designing a low power design using STM32U5A9NJH6Q. As it is low power we aim for lowest possible consumption.We are not using USB on the device; hence we would like to omit any consumption from the VDDUSB and would have connected it to VSS if there where not stated this in the DS: "• VDDUSB = 3.0 V to 3.6 VVDDUSB is the external independent power supply for USB transceivers. VDDUSBvoltage level is independent from the VDD voltage and must be connected to VDD orVSS pin (preferably to VDD) when the USB is not used."Now our VDD is 1.8V and although it states 3-3.6V then we do assume that this range is only needed if the USB interface shall be operational, as it has been the case with other STM32s.The tricky point is the "preferably to VDD".So the question is what is consumption if connected to our 1.8V and what is the impact if connecting to VSS?

When I use STM32G474 for SPI communication and configure it to host、 Received only mode, and use hal_spi_receive_dma() to start communication，the number of clocks is always one byte more than I want.For example，if i want to receive 3byte data and configure HAL_SPI_TransmitReceive_DMA(xx, xx,  3)，there will be 4byte clocks on the clock lines. How to solve this problem？

Dears, I have issues with setting RTC shift register.I have setup RTC with AsynchPrediv = 127 & SynchPrediv = 255 and is working normally.I tried to periodically setting RTC->SHIFTR with value 100 each 5 secs. Then wait for the shift operation to complete and immediately I read SS back using register RTC->SSR register. But RTC->SSR provide "random values" in PREDIV_S range (0 - 255). I expect that it should be lower than 100 but close (not higher)Where could be problem ?Thanks in advanceRadimExample code:  int main(void) { unsigned this_ssr, tick, tr, dr; reset_backup_domain(); ... /* Initialize all configured peripherals */ MX_GPIO_Init(); MX_USART3_UART_Init(); MX_RTC_Init(); ... // Turn on shadow regist

Hi, I am interfacing an ENDAT Encoder with Stm32 microcontroller, Actually my board is controlling motor as well with timer interupts . So I need to ask My code is a function having for and while loops in main().When Motor control side Interupts occur It prolongs my code execuetion which I dont want because I want to be precise in timing of reading and writing. So, I want to ask how to overcome this and How can I manage my code if writing it in Interupt callback fucntion or some other solution. For and while loops used to write and read data from Encoder and for delays as well. Suggestions are higly appreciated.