STM32 MCUs Products

I am currently working with an STM32U5 microcontroller and would like to request more information on the process of calibrating the RTC (Real-Time Clock). We are using an external 32.768 kHz LSE oscillator with 10pf burden capacitors, but we are observing a 6-second drift over 24 hours.I have followed the calibration process outlined in the link below:STM32 RTC Calibration Process[https://community.st.com/t5/stm32-mcus/how-to-calibrate-the-stm32-s-real-time-clock-rtc/ta-p/744958?search-action-id=38939113459&search-result-uid=744958].However, I need more detailed information regarding the calibration procedure.1. I'm not clear how to calculate the correct CALM[8:0] value for the smooth calibration register (RTC_CALR).1. How to Verifying the RTC calibra

SPI CLK frequency dividing methodIn microcontroller (STM32H43), SPI1, 2, and 3 use a common CLK Source.Is it possible to separate these CLK Sources?Also, I would like to divide SPI2 and 3 more than 256 divisions, but is that possible?Please help me.

hello everyoneI'm having problem with debugging stm32f103 blue pill with Keil 5.39 ans st-link v2 programmer.my programmer work fine when i load code without debug on micro but when i want to go to debug mode, my code run till the line__HAL_AFIO_REMAP_SWJ_NOJTAG();and then go to the reset handler part and when it reach to the BX line in reset handler, micro will be halt and not go further anymore.can anyone help me?

Hi,I’m using the STM32L76G evaluation board and would like to work with the CAN protocol. I have a DB9 connector but no slave devices. Could you suggest how I can test and work with CAN in this setup?

Dear Community, I started investigating issues on one old project that based on STML071xB and has been implemented by another engineer. I got confused with implementation of battery measurements. Here is the thing: 1. MCU is directly supplied by a battery (working voltage is expected to be in 2-3V range)2. VREF+ is connected to a battery 3. ADC internal channel is used to measure VDD level Datasheet says that VDD can be measured accurately using internal ADC channel when VREF+ is not connected. Meaning, an internal reference voltage which is 3.0V (bandgap) is used as a reference to measure VDD. But what if VREF+ is connected to a battery voltage, how VDD is supposed to be measured in this case? From my understanding, VDD cannot be measured when VREF+ is used as a reference since it will be giving nearly maximal raw values on ADC output. What is the most confusing part is when I use external supply to powe

Question about SPI communication intervalWe are using HAL_SPI_TransmitReceive to achieve SPI communication, but there is an interval of some us after the SCLK outputs for 8 bits. Is it possible to change this interval time?

Hello folks! One of my devices happened to have a some kind of flash corruption, enough that an ECC NMI was triggered. Removing the "while(1)" from the default handler, to simply return from that handler to my program, did not work. I was thinking that I could delete the offending sector (it was flash used for logging) and then return/reboot. Anyway, I didn't have the opportunity to test because we did a mass erase which "solved" the problem. So, i have two questions: Given that I can give a warning to the user that logs/parameters are lost, what's the right way to recover from this ECC NMI? How can I corrupt intentionally the flash to test the solution found in point 1? (i tried with https://github.com/xarantolus/stm32-flash-corruptor approach to no avail) Thank you all in advance. &nbs

For the STM32G474QE i read that the VREF is either 2.048V 2.5V or 2.9V.is this the maximum voltage the ADC can read in single ended and in differential mode? so if i have a signal that is max 2.9V and min 0V. Will this work? or is the VREF the middle voltage. so when my signal is 0V, the ADC voltage is 2.9V and when my signal is max, the max voltage is the VCC ot the STM32

Hi,I tried booting the STM32F103C8T6 via UART following the boot configuration details from the AN2606 document provided by ST. I have outlined the configuration below.After setting up the boot configuration, I attempted to connect the STM32's UART using a TTL converter and the STM32CubeProgrammer software (Win64, versions 2.18.0 and 2.5.0). However, I encountered some issues, and I have attached a snippet showing the error.

Hi.I have a project that involves using an STM32U535 to control the LEDs shown in the picture.I feel it should be possible to control the COL-x signals with synchronized timers that also trigger DMA transfers to control the ROW-y signals, but I can't figure out how to go about doing that, can I have some help?The picture also includes a rough sketch of the signal timing. I want each phase to be a different length to control the brightness and I think that dead time between phases might be nice to have.LED "Matrix" schematic w/ timing sketch

I've been trying to figure this out for a while, but now my project has come along where it is incredibly inconvenient to test with the cable still inside. I've tried powering with an external supply of 5V to Vin then moving JP2 to EXT, but it doesn't work. I have read that I'm supposed to save to FLASH instead of Memory but I haven't found anything in the datasheet that mentions how to do that. Any help would be greatly appreciated.

I am trying to receive CAN FD and save the data to the SD card, but I am having a problem . Create and deliver an event structure in HAL_FDCAN_RXFifo0Callback, Receive the structure from the application area and call HAL_FDCAN_GetRxmessage. In this case , RxFIFOFULL accur . IF HAL_FDCAN_GetRxmessage is called from callback, RXFIFOFULL does not occur.  However i want to keep the callback statement as short as possible , Also idon't understand why tihs is a problem in the first case. The place where HAL_FDCAN_GetRxMessage is called is cantoQueue().  There is no problem if place this function in  callback rather than app()       .      

Hi,I am working on two STM32 microcontrollers communicating over UART with baud rate 9600. The functional requirement states that I need to transmit and receive data at both microcontrollers. Currently this is not happening as the transmit and receive interrupts conflict I suppose. Please guide me for this problem statement.

I measure 9 channels (3 per ADC) with 12-bit resolution using DMA. The sampling time is set to 6.5 cycles, but the same issue occurred at 2.5 cycles. I get no results at all in the range from 2037 (7F5) to 2047 (7FF), but significantly more results than expected at the value 2048 (800). The rest of t

I am supposed to be receiving 8-bit data with even parity.  The blocks are defined with a header of 'F0', this is S.Bus data if anyone knows that that is.  I setup a simple program that just does receive data.  I get data but nowhere does it show an 'F0'.  Am I supposed to use 'LL_USART_ReceiveData8' or 'LL_USART_ReceiveData9' to read this data?  Is the parity supposed to be read with the data and discarded?  It's not at all clear how the parity is handled. 

Hi, I am trying to stream ADC data to ethernet RJ45 port along with synchronized timestamps. Currently I am trying to figure out the following problems: 1. How can we synchronize ADC data with timestamps? The STM32 tutorial uses DMA, which I assume directly put the ADC samples to the memory but guarantees no synchronization with timestamps.2. How can we stream the data out through ethernet port? The H7 boards datasheet says the RJ45 port is connected with the MCU using "RMII interface" - however, I wasn't able to find anything related in the STM32 tutorial. Are there any existing libraries? I am using an STM32H723ZG evaluation board. Thanks!

Hello ,I am working with stm32h747. M4 .ld File FLASH (rx) : ORIGIN = 0x08100000, LENGTH = 1024K M7 .ld File FLASH (rx) : ORIGIN = 0x08000000, LENGTH = 1024K With the above settings I can run Core M7 and M4 properly.I need more flash on the m7 side and I want to separate the flash as follows M4 .ld File FLASH (rx) : ORIGIN = 0x081E0000, LENGTH = 128K M7 .ld File FLASH (rx) : ORIGIN = 0x08000000, LENGTH = 1896KI also make adjustments with cube programer as in the picture.

Hello Community,I have a NOR Flash memory connected to my MCU (STM32U585) by QUAD-SPI. I plan to use the indirect mode, for erasing and programming the contents of the flash, in one context of my program. And in another context, exclusive of the other, use memory mapped mode to exploit the data already programmed in the flash.I understand that indirect mode and memory mapped mode are exclusive. I do not expect to use the two modes at the same time. But I would like to have confirmation that it is possible to switch back and forth from indirect to memory mapped mode, whenever necessary.Thanks.Eric Lucazeau

Hello All,I am looking for the best suitable MCU for the IPL device.If there are any best options available with the STM then kindly suggest me. Regards,ShivD 

every time I am changing CubeMX and generate code in my STM32H755 project in CubeIDE 1.6 it forgets to add the section with the drivers that is shared between the M7 and M4 cores I end up using git diff every time after CubeMx update. I this fixed in newer versions it is very annoying. And it was not easy to find do to the fact that the IDE claims the source path is included but it is not realy ....cproject:this line is deleted by CubeMX but it is needed:<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="Drivers"/>.projectall the section pointing to drivers are deleted by CubeMX <link><name>Drivers/STM32H7xx_HAL_Driver/stm32h7xx_hal.c</name><type>1</type><locationURI>PARENT-1-PROJECT_LOC/Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_hal.c</locationURI></link>this happens only when using cubeMX from the IDE if t

Hello,I'm working on a software port from a STM32F413 to a STM32H573. I'm done with the application but I'm facing issues with the bootloader.On H5 it looks like it's possible to write flash only with 128 bits sections. On F4 it was possible with 8 bits and 32 bits.In order to handle the legacy code, I've writen this function that reads the 128 bits, replaces a part by my 8 new bits and then writes it back.Here the code:   static bool _BOARD_writeFlash(WORD_SIZE wordSize, uint32_t* writeData, uint32_t writeAdr) { bool ret = true; if (HAL_OK == HAL_FLASH_Unlock()) { if (WORD_SIZE_8 == wordSize) // uint8 { uint32_t quadWord[4]; // Array to hold 16 bytes (128 bits) uint32_t alignedAddress = writeAdr & ~0xF; // Align address to 16-byte boundary while (__HAL_FLASH_GET_FLAG(FLASH_FLAG_BSY)) { // Wait for the flash controller to be ready } __HAL_FLASH_CLEAR

Hello, I am using STM32U5G9ZJTxQ-DK2. I was wondering if the FiFo option from the UART can replace a ring buffer implementation ? I couldn't find much information on the UART FIFO, most documentations and examples are referring to DMA FIFO used with UART IT. If so, how should it be used to read and transmit byte to byte ?  

Good morning everyone,I’m starting to study a topic to implement on my custom board: FW update via UART.The scenario is as follows:My board is, of course, equipped with an SWD connector, which I currently use to program the chip. However, once the board is sold, it will have a USART connector that already allows FW variables to be configured via a USB connection to a PC and a dedicated desktop application. Using the same application (and thus the same USART), I’d like to understand if it’s possible to implement a FW update so that the end user can perform it as well.I don’t have the BOOT0 pin available, as it is occupied by the SWD.I’ve read about custom bootloaders and so on; does anyone have suggestions on what path to follow and/or what references to check?Thank you very much!

Hello, I have a STM32F407 microcontroller with a FSMC interface, which I would like to use to drive this display: NHD-5.0-800480AF-ASXP. The display has a RGB interface.   Should I get a RGB board? Or can I drive it directly with the microcontroller? Is that a time intensive solution?   Thanks to everyone who replies, I appreciate it very much.

Hello everyone,I wanted to ask if this is an error or if this is documented right:When you take a look in the latest RM0444 Rev 5 reference manual on page 1373 there are the DBG registers explained. The "DBG device ID code register (DBG_IDCODE)"  for the STM32G071xx and STM32G081xx do have for the Revision Code Z and Revision Number 1.1 the REV_ID 0x1000. The same REV_ID is used for Revision code A and Revision number 1.0. I attached a screenshot of the manual.Is this a typo or do they really have the same REV_ID for Revision code A and Z?On the next page, the devices G031 and G041 are described, here with differing REV_ID`s. I think this should be the same for STM32G071xx.Please let me know, if my assumption is true. And if this is not a typo, is there a way to find out what Revision number/code my G071 MCU does actually have?Thanks in advance,Michael