STM32 MCUs Products

I am using timer15 to generate TRGO by update event, which is used to trigger DMA to transfer data via spi.From the oscilloscope, I found a delay around 150ns between rising edge of TRGO (PWM output on PA2) and first pulse of SPI sck.I am not sure whether it is normal?

Hello everyone,We are using a custom STM32H755 controller board, and we are encountering an issue where the controller locks up whenever we switch the core clock source (for example, switching from HSI to HSE).According to the evaluation board user manual, in case of an LDO configuration mismatch, the controller can enter a lockup state, and the suggested recovery method is to pull the Boot pin high and erase the flash. However, on the evaluation board (STM32H755 Nucleo/Eval), we have never faced this lockup while switching clock sources.What could be potential reasons causing such behaviour on our board?Any guidance or suggestions would be really helpful!Thanks in advance! 

I am using a NUCLEO-F767ZI Board.Previously I have not used or configured any GPIO. Then I used CubeMX to reconfigure 3 Pins to Inputs with Pull-Down like this: if (HAL_GPIO_ReadPin(button_uncouple_GPIO_Port, button_uncouple_Pin) == GPIO_PIN_SET) {In the code I was using a basic check like the one above. After flashing the new code to the board. The board no longer appeared as a usb device. Instead the system log reportedkernel: usb usb1-port1: over-current conditionI was able to recover access to the board by powering the board using an external 5v power

Hello STM community,I have built and assembled a custom PCB board with an STM32U083CC on it. I have made 5 boards, after the first two did not work, I only populated the minimum on the other three. However, I am unable to debug or event connect to it through any means I tried, and I fear I have a systematic error in my schematic or workflow.I connect to the target over SWD, using a NUCLEO-WL55JC1 board on which I have removed both JP1 and JP7, as well as attached directly to the JP8 headers. I have independently tried using a picoprobe, which gave the same result: Seemingly no answer from the MCU, as both programs report a timeout when trying to communicate with the target.To connect I use the `st-link` utility on linux, and have attached the NUCLEO-WL55JC1 via usb.I have verified the following:- Proper MCU placement wrt to pin numbering- No shorts during soldering or after- I read through the guide for h

Hi Team,We are using STM32G431RBT6, we have tested the ADC1 for PA3 i.e. Channel4 with external Vref 3.3 and VDDA 3.3 with 12-bit selection and the reading we are getting with 5 to 10 counts fluctuations we are seeing but when we have changed to internal voltage ref selection for 2.048 then the PA3 i.e. Channel4 is fluctuating more than 1000 counts! but it works fine for PA0!VDDA remains same 3.3v for both our internal and external voltage.Please suggest us how to resolve this?? Thanks 

Hi everyone,I'm currently designing a custom board based on the STM32F722, and I came across something I need clarification on.According to the STM32F722 datasheet, there is no device listed in the UFBGA176+25 package. However, when searching online (Buy STM32F722IEK6 - ST Online Store), I found a part labelled STM32F722IEK6.Unfortunately, I can't seem to find a dedicated pinout or ballout diagram for this specific part.I'm assuming that since the package is UFBGA176+25, the pinout would be similar (or identical) to that of the STM32F723xx series with the same package.If that assumption is correct, would it also mean that the power supply scheme should follow the STM32F723 diagrams? (i.e., including pins like VDD12OTGHS, OTG_HS_REXT, etc., which

Hi everyone,I have a program with UART communication using interruption and SPI communication using DMA. I realized that when I send a lot of data through SPI, sometimes I get the DMA error code in UART, but I didn't enable DMA in serial. As far as I know UART and SPI are unrelated, so I don't think that the DMA configuration in SPI is affecting UART communication.Has anyone else experienced similar issues or have some clues?I am writing in both SPI1 and SPI2 a buffer with 100 bytes every 50 milliseconds using the following function:HAL_SPI_Transmit_DMA(&hspi1, bufferSPI1, BUFFER_SIZE_SPI1);Below, I provide the configuration of UART and SPI:UART configuration:void HAL_UART_MspInit(UART_HandleTypeDef* huart) { GPIO_InitTypeDef GPIO_InitStruct = {0}; RCC_PeriphCLKInitTypeDef PeriphClkInit = {0}; if(huart->Instance==USART1) { PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USAR

Hi all. I have encountered one ADC sampling problem in STM32H743. When the signal's amplitude is large, the ADC works fine. However, when the signal's amplitude is low, there are many jitters that I don't want. What happens here? How to fix it? Many thanks.Settings: ADC 12bit, clock PLL2P20MHz, asynchronous clock mode divided by 1, sampling time 2.5 cycles, DMA circular mode，timer 2 trigger.Timer2 prescaler 1-1, counter period 200-1, clock 200MHz.Fig.2

I am using output compare with TIM3 on a STM32H755 I am able to use Output Compare to generate a single pulse on pin PC7 using TIM3, Channel 2.I am using Active Level on Match.I call HAL_TIM_OC_Start(&htim3, TIM_CHANNEL_2) onceAfter 0.5s, it detects a match (which is good), and my pin drops and stays low (I have negative polarity set).However,  I can find no way to restart the process.I have tried resetting the timer calling HAL_TIM_OC_Stop(&htim3, TIM_CHANNEL_2) and HAL_TIM_OC_Start(&htim3, TIM_CHANNEL_2), but the pin remains low. I've even tried calling the initialisation code again. I assume I am missing something fundamental here? Settings: (see screen shot attached )Auto-reload preload: DisableMode: Active Level on Match

I am working on a custom board and I have noticed that whenever the device resets, it becomes unresponsive.The reset causes that hang the microcontroller:Calling NVIC_SystemReset from firmwareHaving firmware stuck and receiving a signal from IWDGManually grounding the NRST pin.The debugger shows that the program starts running in a lop at addresses 0x1FFF2XXX, which would be a RAM stack, I suppose?..My FW memory map looks like this:MEMORY { RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 64K RAM2 (xrw) : ORIGIN = 0x10000000, LENGTH = 16K BOOT (rx) : ORIGIN = 0x08000000, LENGTH = __boot_size FLASH (rx) : ORIGIN = 0x08000000+LENGTH(BOOT), LENGTH = __program_size FLASH2 (rx) : ORIGIN = ORIGIN(FLASH)+LENGTH(FLASH), LENGTH = __program_size DATA (rx) : ORIGIN = ORIGIN(FLASH2)+LENGTH(FLASH2), LENGTH = __data_size }My USER_VECT_TAB_ADDRESS is defined a

Hi All,I have a system with 2 SPI masters and a single slave very similar to this post from 2014:https://community.st.com/t5/stm32-mcus-products/spi-multi-master-mode-with-stm32f050/td-p/502107What I would like to do is to temporarily isolate the STM32 SPI master from the bus when the second SPI master is in control.  I don't want to re-init the STM32 SPI between Master and Slave as it might affect the DMA setup so I was thinking of simply changing the CLK and MOSI lines temporarily to input, will this work?

I have a custom designed PCB board where I have used STM32L56 and W25Q256 along with other components. First, I was using SPI for interfacing but it was taking so much time when writing/reading MBs file. So I have to opt for QSPI now. L5 doesn't have specific QSPI, but using OSPI we can configure it as Quad SPI.So, my questions are1) what is difference between QSPI and OSPI as QSPI (command and working mechanism)2) will this code work for OSPI as QSPI3) if you have any test code for OSPI as QSPI, I can test and will modify it according to my needsLooking forward to your responseBelow are my configurations, code files with changes accordingly.void testQSPI(){ OSPI_RegularCmdTypeDef s_command = {0}; /*uint8_t pData[3]; uint8_t wData[0x100]; uint8_t rData[0x100];*/ uint8_t pData[3]; uint8_t wData[0x100]; uint8_t rData[0x100]; memset(pData, 0x00, sizeof(pData)); memset(wData, 0x00, sizeof(wData)); memset(wData, 0x00, sizeof(wData)); uin

Hi Support Team,I am currently using the STM32U575ZIT6Q MCU for development.As per our project requirements, I need to count six independent external pulse signals (from a wind-turbine RPM sensor or similar) with a maximum frequency of approximately 100 kHz.The counter is expected to roll over naturally and reset upon system reboot (final hardware will use the STM32U585 series).Here are my observations and concerns:1. I had previously raised a similar query.2. Could you please guide me on how to configure the timers to count at least six independent external inputs?3. As per STM32CubeMX, the STM32U575ZIT6Q provides only 5 timers supporting ETR pins for external clock input.4. I have observed that enabling certain configurations in Slave Mode disables other options like Trigger Source,Clock Source, and Channel Configurations, leading to conflicts.5. Could you suggest an alternative method to count six external pulse inputs

#define TEMPSENSOR_CAL1_ADDR ((uint16_t*) (0x08FFF814UL)) /* Address of parameter TS_CAL1: On STM32H5, temperature sensor ADC raw data acquired at temperature 30 DegC (tolerance: +-5 DegC), Vref+ = 3.3 V (tolerance: +-10 mV). */uint16_t regval = *TEMPSENSOR_CAL1_ADDR;as soon as this address is read, the CPU goes into Hardfault. I double checked the Address in the Datasheet..also restarts the CPU, when I try to show this Memory with the debugger.also tested it with a Nucleo-H563ZI.the same access with other STM32 CPUs (U5, L4 etc) work with no problems.

I have a Nucleo-H723ZG board.  The GPIO lock bits are set at reset so I cannot set up the ports.  See Attached screenshot.  I can run code just fine and the original demo code did toggle the LEDs. Am I missing something here? 

Hello everyone, I have a problem with the bootloader of the stm32h503 microcontroller. I can't get a response from the stm32 via any of the UART interfaces. I tried different baud rates (9600,57600,115200) but I don't get an ACK from the STM32H503 in response to 0x7F via any of them.The BOOT0 pin is set to a logical one, and then the microcontroller is reset using the nRST pin. I tried re-soldering the H503 to a new one, but there is no difference. The F103 responds perfectly to the same requests and correctly displays the CHIP ID with the same adapter and connection.USART1 on the H503 is working properly, since it is used to transfer data between the 503 and the ESP32.Please tell me what the problem could be and how to solve it?I am attaching a screenshot from a logic analyzer, the first signal is pin BOOT0, the second is RESET, the third and fourth are USART

First of all, this problem is related to ADC and OPAMP, in the program I designed to enable adc1 and adc2, as well as opamp2 and opamp6.The clocks of ADC1 and ADC2 come from the output of the PLLP and each set the same sampling time.        Th

hi. i am trying to save a data into stm32h7b0vbt6 flash memory. so i have used HAL_FLASHEx_Erase to erase one of the sectors and HAL_FLASH_Program to program it. it works and flash will be programed.

Dear STM32 Bluepill Community,I recently acquired an STM32 Bluepill development board and have been attempting to establish a communication link with my computer via the USB interface. Unfortunately, my computer is not recognizing the COM port associated with the STM32 Bluepill.Here are the steps I've taken so far to troubleshoot the issue:Checked the USB Cable and Connection: I have verified that I am using a functional USB cable and ensured that it is properly connected to both the STM32 Bluepill and my computer.Installed the STM32 Virtual COM Port Driver: Following the guidelines provided by STMicroelectronics, I downloaded and installed the STM32 Virtual COM Port Driver corresponding to my operating system (Windows) and architecture (64-bit).Checked the Device Manager (Windows): After installing the USB driver, I opened the Device Manager on my Windows computer to verify if the STM32 COM port is detected, but unfortuna

i have been using stlink v2 for a while now, but today it wouldn't connect with any of my stm32 boards the error mesage that apears is STMicroelectronics ST-LINK GDB server. Version 7.9.0Copyright (c) 2024, STMicroelectronics. All rights reserved. Starting server with the following options:Persistent Mode : DisabledLogging Level : 1Listen Port Number : 61234Status Refresh Delay : 15sVerbose Mode : DisabledSWD Debug : EnabledInitWhile : Enabled Target no device found Error in initializing ST-LINK device.Reason: No device found on target. i have no clue what it could be, i tried in two different pcs with stm32 cube ide in the 1.17 and 1.18 version,

HiIs the UNIQUE ID of the STM32H562RIT6 microcontroller, which consists of 96 bits, entirely variable, or does it include fixed bits as well? Which bits are fixed?

Hi,I have a custom board which has an STM32F446RE with implemented SPI peripheral that should communicate with MAX22530 chip. Currently, I am trying to test the SPI interface but am running into something that looks strange.The SPI ioc configuration is as follows:and the code inside the main function is:As you can see, I am ju

Posted on February 04, 2011 at 12:25Receive DMX-512 in STM32 USART, without timer

LED1_TOGGLE();cant run when i start BLDC. can someone solve it? status of HAL_TIMEx_HallSensor_Start_DMA is OK and Mspinit is OK.void hall_init(void) { __HAL_RCC_DMA1_CLK_ENABLE(); __HAL_LINKDMA(&g_htimx_handle, hdma[TIM_DMA_ID_CC1], g_hall_dma_handle); g_hall_dma_handle.Instance = DMA1_Stream5; g_hall_dma_handle.Init.Request = DMA_REQUEST_TIM5_CH1; g_hall_dma_handle.Init.Direction = DMA_PERIPH_TO_MEMORY; g_hall_dma_handle.Init.MemInc = DMA_MINC_ENABLE; g_hall_dma_handle.Init.PeriphInc = DMA_PINC_DISABLE; g_hall_dma_handle.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD; g_hall_dma_handle.Init.MemDataAlignment = DMA_MDATAALIGN_WORD; g_hall_dma_handle.Init.Priority = DMA_PRIORITY_HIGH; g_hall_dma_handle.Init.Mode = DMA_CIRCULAR; g_hall_dma_handle.Init.FIFOMode = DMA_FIFOMODE_DISABLE; g_hall_dma_handle.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL; g_hall_dma_handle.Init.MemBurst = DMA_MBURST_SINGLE; g_hall_dma_handl

Dear ST experts,we're currently struggling with getting acceptable ADC performance with some of our samples of the STM32H753VIT ADC2. Our setup includes:ADC2 works in Independent modeusing Scan Conversion Mode, 7 Channels (3, 5, 9, 10, 15, 18, 19)14-bit resolution, 16x oversamplig (each channel), 2 bit right-shift for oversamplingADC2-Clock is 37,5 MHz, generated by PLL2P, before internal division by 2, Asynchronous clock mode divided by 1Continuous Conversion Mode and Discontinuous Conversion Mode are both disabledTIM15 triggers ADC2 every 100 µs to scan all channelsDMA Circular ModeVRef = 3.0 Volt, externalWe set up a minimal STM CubeIDE project to verify the described behaviourWhile more than half of our parts work more or less as advertised, but with some parts we reproducibly fail to generate decent calibration values; regardless of whether we use the factory-load linear cali