STM32 MCUs Products

Hi,I'm using a STM32L031. When I'm entering the low power sleep mode und an interrupt occurs i'm getting a hard fault. The programm counter from the stack frame has ether the value 0x00000000 or is pointing at the __ISB after the __WFI - depending on the version i'm using. At the beginning i was using Enter_LP_Sleep1() getting 0x00000000. Then i found a blog discussion where they described the entering procedure of version Enter_LP_Sleep2(). This worked for my project and i thought the problem was solved. Unfortunately every now and then i got the problem with the hard fault again (depending on temperature?!). Now I stripped the code down to the following where i always get the hard fault.int main(void){ FLASH->ACR |= FLASH_ACR_PRFTEN; RCC->APB2ENR |= RCC_APB2ENR_SYSCFGEN; RCC->APB1ENR |= RCC_APB1ENR_PWREN; RCC->APB1SMENR = 0; RCC->APB2SMENR = 0; RCC->APB2SMENR |= RCC_APB2SMENR_TIM22SMEN; RCC->APB1SMENR |= RCC_APB1SMENR_PWRSMEN; RCC->APB2SMENR |= RCC_AP

Hello. I am looking for an example or help, how i can receive data from stm32 at 100kHz with Python via com port ? ADC samples at around 100Khz and streams the data i am not sure how to receive it correctly at this high speed. Thanks  a lot 

Dear all,I am facing very poor performance with the STM32N657.I have some benchmarks that manipulate arrays of data in different ways.I ran these benchmarks onNucleo_H753 @ 480 MHz, with caches ONNucleo_N657 @ 600 MHz, with caches ONFor the STM32N657 I measured the CPU and AXI clocks via MCO2:fCPU = 600 MHzfAXI = 400 MHzThe compiler used is gcc-15.2.0Bench for the Nucleo_H753 ------------------------- uKOS-X > bench System bench. Bench 00: Fill a small 2D array (50 x 50) elements in the internal memory. Then, compute the X-Y projections and the histogram. Fill the array t = 17 [us] X projection t = 41 [us] Y projection t = 18 [us] Histogram t = 30 [us] Bench 01: Fill a small 2D array (200 x 200) elements in the internal memory. Then, compute the X-Y projections and the histogram. Fill the array t = 171 [us] X projection t = 672 [us] Y projection t = 288 [us] Histogram t = 451 [us] Bench 02: Fill a small 1D array (1000) elements in the internal memory with a random pa

Hi, I´m trying to implement ESD protection to a custom board, I found recommendations for this part number (USBLC6-2SC6), which clamping voltage is as follows Look at VCL Clamping Voltage  there are 12V and 17 V  Then the USB pins of my MCU accept a maximum voltage of 5.5V so the 12V and 17V clamping voltage are not below maximum voltage of the USB pins of my MCU, doesn´t this clamping voltage still damages my MCU? and why this part number is recommeded for the ESD USB application??And finally why In the imagen below is shows D+in and D+out as well as D-in and D-out ? It is the same line or not? How should I connect data lines to the IC?   Hope you can help me it´s my first USB implementation using ESD, thanks for read!  

Split from this thread. i've had the same issue. Set the internal pull-up on Rx pin and pull-down on Tx pin.

Hi everyone!  I designed the board shown in the attached picture. It’s built around an STM32H745 microcontroller, along with crystal oscillators, a DAC, an EEPROM, and an NE555 that generates a reset signal when a button is pressed long enough.  After assembling the board, I noticed that it draws an unusually high current (over 800 mA). The power supply goes into compliance and reduces the voltage, while the microcontroller itself becomes very hot to the touch. I noticed that the current rises with time to the compliance and over.To troubleshoot, I removed all external components (oscillators, DAC, EEPROM, transistors, and NE555), leaving only the microcontroller, but the excessive current consumption persists. I’ve checked carefully and I’m quite confident there are no shorts on the board.  When I connect via ST-Link using STM32CubeProgrammer, the tool successfully detects and identifies the MCU. However, within a few seconds, the connection drops because

Hello,I am designing a board with a STM32F446 connected to an IS42S16160H SDRAM through the FMC interface.Could you please provide ST’s official recommendations regarding the use of series resistors on FMC lines?Typical values (22–33 Ω)?Any ST guideline or application note available?Thanks,Rihem

while ((USBx->GRSTCTL & USB_OTG_GRSTCTL_CSRST) == USB_OTG_GRSTCTL_CSRST);The code failed to run, as referenced< https://community.st.com/t5/stm32-mcus/faq-troubleshooting-a-usb-core-soft-reset-stuck-on-an-stm32/ta-p/803224 >This article has been configured, but it still cannot be initialized successfullyRequesting your assistance 

The goal of my project is to turn on an LED on the recieving side through CAN. Both my reciever and transmitter have the transciever circuit. Both are Nucleo boards, TX: F303RE, RX: F446RE. The data i am sending through is 16-bit, but as long as my reciever is not in reset copnstantly (as in me holding the reset button when the program is running), the transmitted and recieved data is not correct, its far to short. The data is the same on TX and RX, but wrong. But when i hold reset on the reciever the data that comes through looks right.  I cant figure out what the problem is, i have measured the connections on the transcievers a million times, measured the RX, TX pin, CAN_H and L and always come back to the same issue.  I am programming the boards in Cube_IDE. The pictures below are of the boards and the signals i recieve. Please help. I dont see how this could be a hardware problem but maybe I missed something, i am still a begginer.    The reciever board is part

I am trying to read ID and to write and read the data from the flash W25Q16JV with SPI2 of stm32L452CE connection, I am not even getting the ID from flash but SPI tx rx is getting HAL_OK. This wiring is working other code and providing unique ID from flash, but it is not working with my code. Please find the issue and update the corrected solution. In this I am using Mode 0 for flash. I have tried not SPI tx project and also FreeRTOS SPI task, but both are not giving ID or values. I will attach the project file with this, kindly check both and update the correct solution.

I am using an STM32F7 Nucleo Board with SPI/I2S to get audio data from this MEMS microphone.https://www.adafruit.com/product/6049?gad_campaignid=21079227318gad_campaignid=21079227318 I am having issues with none of the signals triggering: WS, CLK, or Data.I call the HAL_I2S_Receive function, and neither the clock nor the select signal is triggered. I enter the timeout checker and only leave once I have timed out.If anyone has any suggestions? I have my DAD connected, and I see nothing.  

i DEBUG STM32N5670-DK Template_XIP_FSBL with  stm32cubeide1.19.0  and ERROR comes：Device debug scriptthe detail is：STMicroelectronics ST-LINK GDB server. Version 7.11.0Copyright (c) 2025, STMicroelectronics. All rights reserved. Starting server with the following options:Persistent Mode : DisabledLogging Level : 1Listen Port Number : 61922Status Refresh Delay : 15sVerbose Mode : Disabled Waiting for debugger connection...Debugger connectedWaiting for debugger connection...Debugger connectedWaiting for debugger connection...-------------------------------------------------------------------STM32CubeProgrammer v2.20.0 -------------------------------------------------------------------   Log output file: C:\Users\supcon\AppData\Local\Temp\STM32CubeProgrammer_a04640.logST-LINK SN : 0038002E3333511*********ST-LINK FW : V3J16M9Board : STM32N6570-DKVoltage : 3.27VJTAG freq : 21333 KHzConnect mode: Under ResetReset mode : Hardware resetDevice ID : 0x486R

Hi there, Ive gone around in circles for hours on this. I'm just trying to read a frequency, around 150Hz typ. using the 32 bit timers, for now just TIM2, 4 channel but behaviour same on all channels. Using 16MHz clock the timer overflow happens around 4:40 mins, the read of the period and calc of frequency is fine, matches input signal, until the first overflow.After first overflow the period halves, frequency doubles, and stays like this for every subsequent overflow (confirmed by making a smaller ARR so overflows more frequency). I am trying to increment the high side of a 64bit counter-measurement value with the overflows and then populate the low side with the TIM2->CCR1. Below is my code, just one channel for brevity.As far as I can see it looks relatively textbook and it's just a simple task, it seems so odd that it just doubles the frequency reading on the first overflow but on no subsequent. Any help very gratefully received... // uint8_t TIM2_CH1_N

Hi,I’m using an STM32U385 (Cortex-M33) and trying to enable the Micro Trace Buffer (MTB) using ARM’s MTB-M33 register addresses (0xE0043000 base).No matter what I try, the EN bit in MTB_MASTER never sets.Does the STM32U385 have the MTB component?Thanks,Rakesh

Hi, I’m working on an STM32L431CBT6 project where I enter STOP2 mode and measure ~1 µA current, which is great. However, I need to use PA0 as a GPIO input to wake up the MCU from STOP2. When I configure PA0 as an input (no pull, or pull-up/down), my STOP2 current jumps to about 50 µA. Here’s the relevant setup: MCU: STM32L431CBT6Toolchain: CubeMX + HALSTOP2 entry via HAL_PWREx_EnterSTOP2Mode(PWR_STOPENTRY_WFI)All unused GPIOs are set to analog modePA0 configured as GPIO_MODE_INPUTSupply voltage: 3.3VCurrent measured with multimetervoid Enter_Stop2_Mode(void) { // Set all GPIOs to analog GPIO_InitTypeDef gpio = {0}; gpio.Mode = GPIO_MODE_ANALOG; gpio.Pull = GPIO_NOPULL; gpio.Pin = GPIO_PIN_All; // Set all pins to analog mode HAL_GPIO_Init(GPIOA, &gpio); HAL_GPIO_Init(GPIOB, &gpio); HAL_GPIO_Init(GPIOC, &gpio); HAL_GPIO_Init(GPIOD, &gpio); HAL_GPIO_Init(GPIOE, &gpio); HAL_GPIO_Init(GPIOH, &gpio); gpio.Pin = V1_Pin; gpio.Mode = G

Hello, I hope this message finds you well. I am currently testing two MT25QL512ABB devices in dual mode using the STMH747I, with the same driver for the MT25QL512ABB. After performing write/read verification and rebooting, I encounter issues during subsequent read operations, as it consistently returns 0xFF. I would greatly appreciate your assistance in sharing any insights or findings regarding the root cause of this issue, if available. Thank you in advance for your support. Edit: moved from Issue with Programming NOR Flash MT25QL512ABB1EW9 Using STM32H735IGT6 to a new thread.

STM32U575RGT6 + LIS2MDLTR三轴磁场传感器，通过IIC配置传感器寄存器模式，0x20、0xFE;0x21、0x00;0x22、0x00;0x23、0x0C;0x24,0x40。但是通过测试，Debug出来的点数，Z轴数据不变

I am working with STM32H745I-Discovery board. I trying to do Data transfer through SPI with DMA. But unable to transfer the data. Could any help me with example code for STM32H745I-Disco board.

I made pcb with stm32l011d3, but st-link doesn't detect mcu.Detect other commercial pcb with st-link, so st-link has no problem.I know that boot0 in the current dataset is not connected to gnd. It is not recognized even if I connect it to gnd right away.What am I not doing well? 

Hi For some reason, an interrupt isn't being triggered when I connect the USB to my stm32 board, and the reason is baffling to me. I have attached the relevant excerpt of my code  static inline void core_initialisation(void) //from page 3403 { USB_OTG_CfgTypeDef usb_config; usb_config.dev_endpoints = 6; // Typical number for HS device endpoints usb_config.Host_channels = 12; // Typical max host channels for HS core usb_config.dma_enable = 0; // Disable DMA (set 1 if your HW supports and you want DMA) usb_config.speed = USB_OTG_SPEED_HIGH; // High Speed usb_config.ep0_mps = 64; // Endpoint 0 max packet size (64 bytes for HS control EP) usb_config.phy_itface = USB_OTG_HS_EMBEDDED_PHY ; // Use embedded PHY (if your MCU supports it) usb_config.Sof_enable = 1; // Enable SOF (Start Of Frame) output usb_config.low_power_enable = 0; // Disable low power mode (set 1 to enable) usb_config.lpm_enable = 0; // Disable Link Power Management usb_config.battery_charging_ena

I am working with an STM32C092CCT6 (STM32C0 series) and I need help with reading and writing variables into Flash memory.I want to store a few configuration values (like integers or structures) that should persist after reset or power cycle.From what I understand, I need to erase a Flash page first and then program data at a specific address.I am not sure about the correct sequence for the C0 series (unlocking Flash, erasing, programming, and locking again).I would like to know the best practice for data alignment (word/halfword).Should I use HAL functions like  HAL_FLASH_Program() or is direct register access recommended for reliability?If anyone has a working example code snippet or reference for reading/writing user variables into Flash on STM32C0, it would be really helpful.Thanks in advance!

I'm using the STM32F103C8T6, and trying to blink my LED via the interrupt handler of a DMA with this code#include <stdint.h> // STM32F103C8 is a medium density device, hence we use the xB header #include <stm32f103xb.h> #if !defined(__SOFT_FP__) && defined(__ARM_FP) #warning \ "FPU is not initialized, but the project is compiling for an FPU. Please initialize the FPU before use." #endif int main(void) { uint32_t blinking[2] = { GPIO_BSRR_BR8, GPIO_BSRR_BS8 }; uint32_t dest = 0; RCC->CR |= RCC_CR_HSION; while ((RCC->CR & RCC_CR_HSIRDY) == 0) ; RCC->AHBENR |= RCC_AHBENR_DMA1EN; // Enable clock for DMA1 RCC->APB2ENR |= RCC_APB2ENR_TIM1EN; // Enable clock for TIM1 RCC->APB2ENR |= RCC_APB2ENR_IOPAEN; // Enable IO port A NVIC_EnableIRQ(DMA1_Channel2_IRQn); DMA1_Channel2->CCR |= DMA_CCR_MSIZE_1 // 32-bits memory size | DMA_CCR_PSIZE_1 // 32-bits peripheral size | DMA_CCR_MINC // Memory increment | DMA_CCR_CIRC // Circular mode

Some of the STM32 CPUs have a USART with a Timeout timer which is good for modbus applications.Is there any overview available which CPU devices have this specific periperal implemented?In the Datasheet this function is called RTOIE, or RTOR.     

Hello everyone,Hope you are all doing well. I am currently working on a BMS that includes an STM32L562VET6Q MCU and other peripherals.ARINC429 is completely new to me. This week, I have been reading the ARINC 429 (HI-35850) datasheet and trying to correctly configure the SPI on my MCU to send data to the ARINC. In this post, you will find the I/O connections between the ARINC and my MCU. For now, I am only using CS, SCK, and SI to send data, and I am monitoring CS, SCK, SO, and SI on my picoscope with wires directly pinned to the ARINC.Below, I will provide the configuration files for SPI, GPIO, and ARINC so you can better assist me.My problem is that, compared to the datasheet, I do not see the exact data frames I was expecting after reading the datasheet. Since I am new to this protocol, I am confused about what to expect, which I believe is due to a lack of understanding. Therefore, I hope someone can kindly guide me through this issue and correct my configuration if possible.Thanks

Hello... I'm learning to use an external ST-Link to debug the F446ZE Nucleo using SDW. Can anyone advise on how to connect the SDIO, SDW pin on the Nucleo board to the external ST-Link v2? Additionally, what settings should I configure in CubeIDE to use the ST-Link v2? I also have an ST-Link v3. Any advice on ST-Link v3 is also welcome, thank you.  https://www.amazon.sg/SFCPI-Programmer-Microcontroller-Interface-Simulatio/dp/B09Q22M9CK/ref=sr_1_36?crid=16YO1JU6U2RWK&dib=eyJ2IjoiMSJ9.qqFD5Om07FWVxJ7mURnZvAnBXRCvJLAQA211deD1kNya9Js-DqO4-cRn32AtBIWEjDRlPpe_iywzItiqexRhb4j0qY49XkVoXA0n89ljKBoRFXV6OtPfcvENRcc6aJKyvUjyjVMDuYCSStnxmpRokAql1UFr0zT4LqAi1VGYAovx1-V2XjdyoouwF_KGzUU-6lEV6hBoUunOrp0PLq7VsBZMLrv5TwNRszwZUo5HPvUgHSQ-3m51Yt_CG7esZIWzdBnP3x7p0Yd8WOAMxQlEtFSSIx_3tGKZ-m8LbvSLx6M.QUpPBdFT7TRzoO4J6g9ul67tLg7CKKrPYTn3bClG2QQ&dib_tag=se&keywords=st-link+v2&qid=1755192393&sprefix=ST+LINK+%2Caps%2C278&sr=8-36