STM32 MCUs Products

I'm having some ADC+DMA sampling problems with the H750.  When the ADC+DMA is working, in continuous mode, PC2_C(ADC3_CH0) gets 16bit sampling data which is unstable and constantly jumps between 10000+ and 30000+. I guess there is a problem with the code configuration.  However, the channel PF9(ADC3_CH2) with the same configuration is very stable with only a very small fluctuation.  The ADC clock frequency is 10Mhz.I checked the errata but could not find a solution.  In HW, both VDDA and Vref+ have a pair of decoupling capacitors near H750, and each ADC channel also has a low-pass filter. The following is the sample data of PC2_C 

I came across a nice tutorial (8-bit data) and successfully had the code work with the STM32F103C6/8. Win11 can see it as a joystick.   *** Original HID_MOUSE_ReportDesc *** 0xA1, 0x02, // Collection (Logical) 0x05, 0x01, // Usage Page (Generic Ctrls) 0x09, 0x30, // Usage X 0x09, 0x31, // Usage Y 0x15, 0x81, // Logical Minimum (-127) 0x25, 0x7F, // Logical Maximum (127) 0x75, 0x08, // Report Size (8) -> 8 bits (1 byte value) 0x95, 0x02, // Report Count (2) -> 2x = 2 bytes   Due to a higher resolution of the ADC (4095 max), 16-bit data would be preferable. I made a few changes to the Report Descriptor and the HID_MOUSE_REPORT_DESC_SIZE, 2 more bytes longer.  

Hi,everyone. currently i'm trying to acces IS42S16400J SDRAM using STM32H743ZIT. but i have problem, when i write "01020304" data to C0001000 addres the data was duplicated to addres c0001080,although i didnt write anything on that addres do you guys know what my mistake is?

Hi!  I am working on a project where we are using DMA driven SPI-transmissions. I am using LPTIM1 to synchronize readouts of multiple SPI busses. The setup works when the transmissions is equal or below 128 bits (for SPI1-SPI3).  When HAL_DMA_MuxSyncConfigTypeDef.RequestNumber is above 4 (at DMA_PDATAALIGN_WORD and DMA_MDATAALIGN_WORD) it will not work.  From what I can understand this is due to the size of the fifo registers of the SPI-peripheral.  Is there a workaround for this?  This is my current setup: DMA_InitTypeDef txDMAinit; DMA_InitTypeDef rxDMAinit; spiHandle.Init.Mode = SPI_MODE_MASTER; spiHandle.Init.Direction = SPI_DIRECTION_2LINES; spiHandle.Init.DataSize = SPI_DATASIZE_32BIT; spiHandle.Init.CLKPolarity = SPI_POLARITY_LOW; spiHandle.Init.CLKPhase = SPI_PHASE_1EDGE; spiHandle.Init.NSS = SPI_NSS_HARD_OUTPUT; spiHandle.Init.BaudRatePrescaler = S

I'm trying the LPBAM_LPUART_TransmitReceive with a NUCLEO-U575ZI-Q but I can't make it works.I enabled the debug by removing the init of PA13 and PA14. The MCU got stuck into an hardfault when calling ADV_LPBAM_UART_Transmit_SetFullQ() for the second time:Any idea what is wrong, thanks in advance ?

RM0360 (STM32F030x4/x6/x8/xC and STM32F070x6/xB) says:"The ALRAF is set to 1 if the calendar subseconds, seconds, minutes, hours, date or (sic?) day match the values programmed in the alarm registers RTC_ALRMASSR and RTC_ALRMAR"But, surely, that should be AND - not or ?ALRAF is set to 1 if the calendar subseconds, seconds, minutes, hours, date and day match the values programmed in the alarm registers RTC_ALRMASSR and RTC_ALRMAR 

There have been several threads lately where the posters have seemed completely unaware of what a "solder bridge" is, and how to use it. Example: https://community.st.com/t5/stm32-mcus-products/uart-in-stm32-l432kc/m-p/689335/highlight/true#M253126 Perhaps this is something that needs to be explicitly explained & illustrated?  

I am having touble re-entering standby after a RTC wakup. I am using the STM32L412 (Nucleo-32)I have written some code that enables and sets the RTC, then sets alarm A and alarm B, before going into standby. After the correct time has elapsed, alarm A wakes up mcu. I then check to see if the system was resumed by standby, and if it has clear the standby and wakup flag, before entering standby again to wait for alarm B to be triggered. The problem is that the mcu instantly wakes up and again clears the flags and goes into standby. It keeps looping round this indefinitely. The only thing I have found to stop the mcu for instantly waking back up is to run:HAL_PWREx_DisableInternalWakeUpLine();This however sets it so that alarm B does not now wake up, ie I believe all wakups are disabled.My code is: /* Check and handle if the system was resumed from StandBy mode */ if(__HAL_PWR_GET_FLAG(PWR_FLA

Hello, when I was using the STM32H563 I3C, I found that when configured with VDDIO2 = 1.2V and a frequency of 12.5MHz, the data read in SDR mode would be misaligned. The waveform received on the SDA line was 0xF9, but the MCU received 0x7C. After I increased the VDDIO voltage to 1.5V, the data read was correct. And I tried VDDIO2=1.2V, frequency =6.25Mhz, data was correct, too. 

Hello,I'am currently programming on a STM32G473. I'am sending CAN Message via the FDCAN peripheral.In generally everything works, all my messages I put into the Tx Buffer are sent.But in one little detail I'am confused:In Figure 669 its described, that the TX buffer consists of 3 elements.But if I want to find out in which index I have to put the next message by reading the TXFQS_TFQPI field, I'am confused why the reference manual describes a range of 0-3 for this field. So it seems that there are 4 messages? But in the Add-Request Register (TXBAR_AR) there are only 3 Bits for adding transmission requests (and the RAM buffer has only space for 3 Messages).If the put index is 0 --> I set the Bit 0 in TXBAR_ARIf the put index is 1 --> I set the Bit 1 in TXBAR_ARIf the put index is 2 --> I set the Bit 2 in TXBAR_ARIf the put index is 3 --> What should I do? There is no bit for a fourth request (and als

Hi,I'm encountering an issue with my STM32H750 MCU. I download my program to the flash via the UART interface using STM32CubeProgrammer. The MCU can work well for a few days, but suddenly crashed. This problem occurred randomly on 2 out of 15 boards with the same hardware and software design. Here are diagnostic steps taken:(1)Connecting via the SWD interface using J-link and found option bytes(0x52002000) is able to read, but flash bank 1(0x08000000)is unable to read Checked the read protection was set to level 0. J-link log: SEGGER J-Link Commander V8.12a (Compiled Jan 9 2025 14:39:11) DLL version V8.12a, compiled Jan 9 2025 14:38:21 Connecting to J-Link via USB...O.K. Firmware: J-Link V9 compiled Dec 13 2022 11:14:50 Hardware version: V9.70 J-Link uptime (since boot): N/A (Not supported by this model) S/N: 69730352 License(s): RDI, GDB, FlashDL,

In some readings, I saw that there are some STM32s that can be used to control Switched Mode Power Supplies. Are there any suggestions for articles with more details on the subject?I am writing a book about "SMPS" and would like to dedicate a section of the book to microcontrollers specialized in switching control in "SMPS".

Hello,I've designed my own PCB using the STM32H533CET6 microcontroller. However, when I try to connect to it using an ST-Link V2 via SWD, STM32Cube Programmer gives me the error: "Cannot identify the device".I've already tried connecting under reset and adjusting the connection settings, but nothing seems to work. Additionally, on another PCB that was previously working well, I replaced the STM32F303 with the STM32H533, and the same issue occurred.Could you please help me with this? I'm completely at a loss as to what might be causing the error.Thank you! 

I'm using a STM32L151RBT6 and trying to debug with a STLink V3.The debugger loses connection when I encounter the line:PWR_VoltageScalingConfig(PWR_VoltageScaling_Range3); Specifically, when it changes the PWR-CR Bits 12:11 (VOS). I have no issue changing it to Range 1 or 2, but 3 results in this message:"ST-LINK device status: Failed to get status, Target not responding, retrying... 19" Any help would be greatly appreciated!STM32L100xx, STM32L151xx, STM32L152xx and STM32L162xx advanced Arm<Sup>®</Sup>-based 32-bit MCUs - Reference manual

Hi ST team, Today I have an issue in my hardware.I flash a software via STLink in debug mode succesfully. When I start the program, the console shows that "cannot read register..." or something like that :( I cannot remember.After that, STLink cannot find the target board so that I cannot reflash or do anything with my hardware. I tried the same steps in other hardware and the same issue happened so I think this is not hardware issue.  Please help me check this issue. I also attached Debug folder. Could you please help me try to see if issue also happens in your hardware? Thank you very much. 

I have a 12V GPIO high logic input on my board. Should I convert it to a 5V logic level or a 3.3V logic level? Previously, I have implemented 12V to 5V logic level conversion and already have components for this conversion in my inventory. If feasible, can I proceed with 12V to 5V conversion, or is it generally more advantageous to convert 12V high to 3.3V logic level for better compatibility or performance? Is there any recommended project/schematic/component that I should look into for this application?

Dear STM team,do you consider to add "Programmable IO" (PIO, as in RP2350) or FlexIO (as in NXP MCUs) to your chips?It would be really cool: often I need interfaces on MCU which are not available as a peripheral devices, such as: MDIO (Master), JTAG (as a host adapter), VGA display. Having a state machine implementing such interfaces via GPIO would be a great enhancement of your chips.I see a trend towards to have FPGA fabrics in MCU (or FPGA with MCU, Zync, PolarFire) plus having flexible I/Os, programmable I/Os, able to implement new interfaces and protocols.For instance: your QSPI peripheral is not a full bi-directional (full-duplex) interface. I cannot use it in regular SPI mode. But I would need QSPI and SPI on the same external devices. It would be nice to have a feature like PIO, FlexIO, in order to implement when it is not supported by on-chip peripherals.Thank you.(I am diverting away from STM after being a long time user due to such

Hello,I've a short question - is RSS preflashed on eval boards or it is only flashed when specific part number is ordered?

hi all,we're using SW4STM32 on a project that uses CubeMX-generated code with FreeRTOS. Our own application is a mix of C and C++. We soon found that malloc/free (used behind the scenes by C++) don't play nice in the multi-threaded environment.Dave Nadler's solution for overriding FreeRTOS memory management with newlib's [http://www.nadler.com/embedded/newlibAndFreeRTOS.html] works as far as we've tested it ... ... but is there no ready-made already integrated solution?Thank you for your consideration,-Dan

 I'm taking my first steps as an embedded engineer, especially in STM32. I've been looking for a specialization that will give me more experience, in addition to the 35 years I have in IT (Client/Server) and about 10 in embedded systems.I'm currently taking some quick courses to make it easier to get started, and I intend to get to STM32H7. I saw that there's a study path on the ST website.Am I on the right track? I'd like to have tips from professionals with more experience in STM32.Thanks.

when I am using frequency 266mhz after that I am sending the string Hello world in 0XC000000 0 but in address, 0xC0000080 appears again, can you help me with the case?thanks

Hi  I have am using the Timer2 on the STM32L433 chip, and for some reason the interupt gets called as soon as timer is started.  Below is my code, and the  clocks are running at 60MHz.  Anyone any idea what I have done wrong? Many ThanksScott. void main(void) { ..... Timer2_Init(); Start_OneShotTimer2(3000); //set for 3 seconds, but interupt routine gets called straight away while(1){} } void Timer2_Init(void) { // Enable Timer 2 clock RCC->APB1ENR1 |= RCC_APB1ENR1_TIM2EN; // Configure the timer for one-pulse mode TIM2->CR1 |= TIM_CR1_OPM; // One-Pulse Mode (counter stops after update event) // Enable TIM2 interrupt in NVIC NVIC_EnableIRQ(TIM2_IRQn); } void Start_OneShotTimer2(uint32_t milliseconds) { uint32_t prescaler; // 1. Stop the timer before modifying its configuration TIM2->CR1 &= ~TIM_CR1_CEN; // Stop the timer (disable counter)

Hello,due to pin shortage, I (foolishly) used pin PC14 and PC15 as output GPIOs on a board that I designed and my colleague is writing the firmware. We never use them previously, due to the all problems with limited sourcing caused by internal backup domain power switch and their low-speed limits. For the current board, the low speed and low drive was no issue.But now there is a problem - we are unable to get the pins working. I tried the code generated by CubeMX and my colleague, who uses own routines, used the approach described on several pages on the web - first disable the LSE in BDCR by cleaning the LSEON bit, wait for LSE deactivation, turn on the backup domain power, enable access by setting DBP bit, and finally normally set the pins as low-speed push-pull outputs. We tried all this, but the pins stay low all the time. For testing, we used a NUCLEO-F401RE, because the board is still being manufactured.Could be the absence of the HSE crystal (or, a T

Hi everyone,I’ve been working in IT for a while, focusing mainly on cloud computing and Linux environments. However, I’ve recently become really interested in embedded systems and the potential for integrating hardware and software solutions.I came across some resources and training focused on Linux, which I think might give me a good foundation for the embedded systems world. But now I’m a bit stuck. I’m not sure how to apply that knowledge in a more hardware-specific domain.I’m curious about how others here have transitioned to embedded systems development. Were there any specific tools, frameworks, or projects that helped you get started? Also, if you have any advice on combining Linux knowledge with real-time operating systems or hardware-level programming, I’d love to hear it.Thanks in advance for your guidance!

So I've got a program with a fast tight loop doing some minimal things, and the rest is housekeeping/UI stuff in the main loop. When I enabled ICACHE, the speed of the tight loop increased DRAMATICALLY and overall the process is faster at basically everything. A colleague of mine said that he uses the DCACHE also and that for his application on an H7, the DCACHE made a huge performance improvement. But, as far as I can measure (which is toggling GPIO pins at critical sections of code and measuring the time with o-scope), the DCACHE made no difference on or off. So for now I 'm just leaving it off because I know I need to be careful with DCACHE and my SD Card etc. and it's easier to just leave it off, but I'm wondering what areas/use cases is the DCACHE actually supposed to improve with this chip?