STM32 MCUs Products

Hi everyone, I’m working on CAN communication using STM32F746 in STM32CubeIDE.My goal is to transmit CAN frames continuously and verify them using BusMaster or PEAK CAN analyzer,but I’m not seeing any CAN frames on the bus. To help review my setup, I have attached my project ZIP file below.Could someone please check and confirm: If my CAN clock configuration is correct Whether the CAN2 TX/RX pins are configured with the right alternate functions If my main.c code for CAN initialization and transmission looks correct Whether I need any filter configuration even if I only want to transmit Setup details: Controller: STM32H746 Interface: CAN1 Mode: Normal Baud rate: 500 kbps TX/RX Pins: [PD0/PD1] Using HAL driversCan you please  check with my project and help me out .  

 I remember some other RM suffering from this in the past.JW

As reported here, this is obviously incorrect.Also, this has been already reported by Uwe Bonnes for 'F411/RM0383, which has indeed been corrected in the registers description, but the GPIO register map still contains the incorrect value. So, could ST please go through all low-end 'F4 RM and check/correct at both places where applicable?Thanks,JW@Amel NASRI​ @Uwe Bonnes​ 

Hello,I am not sure if this is the right place to report a documentation errors!There is a typo in Table 11 in page 99. The address should be 0x0803 F000  

Hi everyone. I am driving a Neopixel LED with a PWM signal in DMA mode using a timer. Even though all variables are the same, my code works with timer 3, but the same code doesn't work with timer 2 with the same timer configuration. Why could this be? I checked for a 16-32 bit difference, but they say it's not related to that. I have an STM32G431 Nucleo board. I tried all pin configurations for timer 2 channel 1, but it didn't work. İf it's normally and ı cant use this for neopixel, I will change timer but I use other timers for different jobs with  different frequences. But ı dont thinks so.

Hy,I have tried to resample a 16bit/8kHz audio signal to 16kHz and 48kHz.Conversion works, but the audio is noisy. I am tested it on development board STM32H747 CM7 core.I have tried libraries: SRC236_CM7_GCC.a and SRC236HQ_CM7_GCC.a without quality improvement.I am working with 10ms blocks.Initialization parameters are:  // conversion from 8kHz to 16kHz src236_static_param_t src236_static_param.src_mode = SRC236_RATIO_2; // library initialization src_error = src236_reset(PSrc236PersistentMem_ToCodecOut, PSrcScratchMem_ToCodecOut); if (src_error != SRC236_ERROR_NONE) { return (-1); //error AUDIO_ERROR_SRC } /* SRC236 effect static parameters setting */ src_error = src236_setParam(&src236_static_param, PSrc236PersistentMem_ToCodecOut); if (src_error != SRC236_ERROR_NONE) { return (-1); //error AUDIO_ERROR_SRC } // 8kHz, 16 bit audio input // 10ms block LowRateConversionBuff_ToCodecOut.nb_channels = 1; LowRateConversionBuff_ToCodecOut.nb_bytes_per_Sample = 2; LowRateConv

HelloMy current requirement is to generate an FSK waveform with two frequencies around 3-5 MHz, a rate of about 700K, and output a square wave using PWM. The method involves switching frequencies by updating ARR and CCR using two timers—one for PWM output and the other for frequency switching (updating ARR and CCR). The main issue is updating ARR and CCR simultaneously since these addresses are not contiguous, and various methods tried have failed. See if the approach below works.void HAL_TIM_Base_MspInit(TIM_HandleTypeDef* htim_base){if(htim_base->Instance==TIM1){/* USER CODE BEGIN TIM1_MspInit 0 */ /* USER CODE END TIM1_MspInit 0 *//* Peripheral clock enable */__HAL_RCC_TIM1_CLK_ENABLE(); /* TIM1 DMA Init *//* TIM1_TRIG Init */hdma_tim1_trig.Instance = DMA1_Stream1;hdma_tim1_trig.Init.Request = DMA_REQUEST_TIM1_TRIG;hdma_tim1_trig.Init.Direction = DMA_MEMORY_TO_PERIPH;hdma_tim1_trig.Init.PeriphInc = DMA_PINC_DISABLE;hdma_tim1_trig.Init.MemInc = DMA_MINC_ENABLE;hdma_tim1_

Hi everyone.I tried adding USB_OTG_FS/Virtual Port Comm to STM32F407VET6 as a device only, but the problem is that when I try to connect the STM32 USB to my PC/laptop, it says “USB not recognized” on my PC/laptop, and I think it might be a problem with the cable, but after I replaced the cable 5 times and tried connecting it to my laptop, the problem remained the same.Where does this problem originate—in the code or the hardware itself?I used two boards, and both experienced the same problem.                             I replaced the MCU on the board with the original MCU.thank you :)

Hello, everyone.So, I want to assign a serial number/device number to all my devices, and each device has a different serial number/device number. My question is, how can I change the serial number/device number with the same firmware without having to change the string in the source code as the serial number/device number and rebuild it?Is that possible to do in STM32?Thank you:).

Hi everyone,I’m working on an audio recording project using the STM32H747-DISCO board with its built-in PDM microphone. The recording works — I can clearly hear my voice — but there’s a constant background white noise in the recording. I’m trying to figure out what’s causing it and how to reduce or eliminate it.I’m using STM32CubeMX + HAL, with a standard SAI + PDM2PCM configuration. The WAV file is saved to an SD card using FATFS.Here are some key details:I’m not using any prefix or divider for the sampling rate — I simply feed the microphone with a 3 MHz clock via SAI4A with "User Set Master Clock Devider Value".I’ve achieved the most satisfying results so far with these settings:SAMPLE_RATE 24000UPDM_DECIMATION 128UPCM_SAMPLES 1024see my config below:#define BUTTON_DEBOUNCE_MS 200U static uint32_t last_button_tick = 0; #define SAMPLE_RATE 24000U #define BITS_PER_SAMPLE 16U #define NUM_CHANNELS 1U #define PDM_DECIMATION 128U #define PCM_SAMPLES 1024 #define PDM_HALFWORDS_PER_BLOCK

I am currently working with the STM32U5G9J-DK1 development kit interfacing with a Tianma-based display. I have successfully managed to update the display using adaptive command mode with DSI long and short write commands. However, I am encountering issues related to the refresh rate and switching modes:Issue with Refresh Rate:While updating the display using long write DSI commands, I observed that the refresh rate is significantly slow. To optimize this, I attempted to change to High-Performance (HP) mode after the initialization commands.Problem Switching to High-Performance Mode:After the initialization commands and sending a pixel memory write command, I disabled the DSI long write command from low power to check if the display would operate in HP mode.However, when I disable the low power (LP) mode for long write commands, the display shows nothing. The display only works if I enable LP mode for the long write.Configuration Details:I am using FIFO while writing pixels in long writ

Hello All,I'm trying to keep my MSC + CDC USBX connection alive on my STM32U575.  When I connect the device via USB cable, Windows Explorer opens and displays the files on the W25Q NOR Flash.  I can select a file and open it from the flash.  I can also open Tera Term and connect to the device.  I created a ThreadX task to write out text over CDC every 5 seconds.  After a random amount of time, Tera Term stops writing out the text and lock up and even though the device is displayed in Windows Explorer, if I try to open a file, it fails, with a timeout error.I've explored the U5 samples, but I can't find any differences between the MSC or CDC projects and my project.  None of the samples, that I've found, are doing anything in the callbacks or change methods that would indicate the handling of some kind of "timeout" issue from the USB host.Any guidance to why the device just stops communicating with the windows machine would be greatly appreciated.  If

Hey all,I would like to confirm some current consumption figures present within the STM32N6570 datasheet.I am particularly curious about the current consumption numbers in the various sleep modes.Table 31 (Current consumption in Run mode) suggests IDD is ~0.3mA in typical conditions. This seems extremely low for normal operation. Also, when referring to Table 33 (Current consumption (core) in Run mode), it is entirely possible to have an IDDCORE of 100mA, which is 300x that of IDD. How can this be so high?Thanks everyone!Edit: I noticed several other interesting measurements but I was looking at datasheet Rev 2 instead of Rev 6 (most recent), which resolved several questions. The Rev 2 datasheet was sent to me by a coworker who downloaded it from the ST website a few days ago, so Rev 2 may still be up somewhere?

Hi, I'm trying to get a PWM output that changes duty cycle on each period with DMA in circular mode. I have seen other similar posts (ultimately I'd like to control a WS28 LED with 800kHz), but they are for other MCUs and everything is different in the details. I tried this for quite a while in a bigger project, so reducing it here to the bare minimum.To start with, I'm using a slower timer and just try to get the DMA to change the CCR1 at all on a dev kit (NULCEO-H563ZI)Starting of with this example: The unmodified example works and outputs a PWM on PE9 (50% DC). No I configure DMA as well:  In the main.c, I add the DMA: In my understanding, the CC event of timer1 ch1 should now trigger the DMA transfer of the samples from buf, one by one, so DC should be 10000, 50000, 10000, 50000, and so on (circular DMA).The output on the scope is unchanged, the DMA never seems to transfer anything.I also tried to use other trigger source for DMA (GPDMA1_REQUEST_TIM1_T

I'm planning to connect 40 LED with a current of 20mA (total 800mA) to 40-gpio pins of STM32G4 device. The pins will be configured as Open-drain so the 20mA LED current of each pin will flow through an external resistor and the internal low-side NMOS transistor of the IC.In this case I believe there will be no restriction about the STM32G4 power dissipation and current capabilities. This is true or am I wrong? Please could anyone clarify this?Thanks in advance,Gaston

Hi all,I a developing a custom product were the partition is like Bootloader  + APP1 + Partition 2 , were I Integrated the DFU library into bootloader and which is successfully enumerated in PC without any errors. My goal is do the flashing .bin file into app1 partition using this  USB DFU. But I couldn't even connect the the device. Attaching the screenshot and logs for your reference.the MCU is stm32h563rgt6 with 1mb of flash. Bootloader size: 128kb  //0x08000000App1 partition size: 384kb and  //0x08020000Partition2: 384KB ////0x08080000this also asking when trying to connectand I proceeded with OKplease see the logs from STM32 Cube programmer15:53:40 : UR connection mode is defined with the HWrst reset mode15:54:11 : USB speed : Full Speed (12MBit/s)15:54:11 : Manuf. ID : STMicroelectronics15:54:11 : Product ID : STM Device in DFU Mode15:54:11 : SN : 336E3683323315:54:11 : DFU protocol: 1.115:54:11 : Board : --15:54:11 : Device ID : 0x048415:54:14 : Dis

Hello all, I disabled the M4 core based on the tutorial by ST Employee mEALLEm, I pressed Apply, saw the option byte successfully programmed notification, but I have been waiting for MCU disconnect notification for 20 minutes now. The LD4 keeps blinking greed and red. Is there something I am missing because it should not be this long ? Thank you

For community awareness:Unless otherwise stated, STM32 GPIOs do not have partial-power-down / Ioff / back-drive protection.Example: If VDD=0V (or VDD unpowered) and a GPIO is driven with 3.3V, then excessive current may flow into the GPIO.This includes TT and FT GPIOs.The behavior of a back-powered GPIO is nondeterministic.Some back-powered GPIOs behave High-Z. Some draw excessive current. Some pull down after ~100ms (GPIO becomes an output). The behavior varies with temperature. The behavior varies chip-to-chip even with same part marking / date code. Measuring different TT and FT GPIOs on a standalone IC with multimeter in diode mode has inconsistent results: sometimes measuring OL, 0.8V, or 1.5V and the measurement changes either due to measuring other pins or due to temperature.ST GPIO documentation may cause confusion regarding FT GPIO back-drive behavior. There are also forum posts which suggest FT GPIOs might have back-drive protection.However, FT pins do not have back-driv

i use stm32h750 as a decoder to translate use audio data into i2s 16bits 48khz data.however, when i use usb_otg_fs, everything works properly,but when i use the same configration and only switch to usb_otg_hs,some problem has occured. i use usb3300-ezk as the external PHY, which can communicate with my windows11 laptop through a type-ccable.the computer can detect stm32 audio class and bus hound shows the det description progress run correctly and then system send set interface 0, when i try to display music, it sends set interface 1 for several times but meet xact error.i noticed that something may related to the main clock and usb clock, but i cant find the right settings.

Hello,maybe this is bit off-topic, but does anybody know if it is possible to suspend an ERASE operation and write to another (previously erased) sector?I want to save a page in flash in case of a power outage and want to interrupt a probably ongoing ERASE.If so, is this possible in internal flash or only in external flash?In our design there are 2 QUAD SPI NOR flash connected to the dual QSPI- and one QUAD SPI NOR to a SPI interface of the STM32H75x. It would be surely possible to write to an idle flash while the other is busy erasing a sector. But it would be nice if write-while-erase-suspended would work on a single flash.The documentation of flash is confusing e.g. in the MICRON flash, which is soldered on the STM32H753_EVAL board, it seems there is difference in sector erase and erase command:The MACRONIX AN0247 says that programming is allowedbut the datasheet says that only read is allowed in suspended stateAny experience here, has anybody checked this out?  

Hello, According to the STM32L496 reference manual, the DAC should be disabled before entering STOP2 mode, which implies that it doesn’t operate in STOP2.However, in STM32CubeMX there is a configuration option for DAC output — external pin, on-chip peripheral, or both.Earlier, when I selected external pin, the DAC output was not working in STOP2 mode (as expected). But now, after selecting on-chip peripheral, it is working even in STOP2 mode.I am using DAC_OUT1 and DAC_OUT2 as threshold references for an internal comparator (not external output pins).My questions:Is it safe and valid to use the DAC with the on-chip peripheral option in STOP2 mode?Or should I restrict my design to STOP1 mode for reliable operation?Appreciate your help and clarification.  Thank you,Mounika

Hi!I’m currently building an application where I need to periodically wake up my NUCLEO-U575ZI-Q from Standby mode using RTC alarms. I’m aware of the Wake-Up Timers, but I’ve been specifically asked to use alarms. This will be integrated into a FreeRTOS system, but for now I’m trying to get it working in a plain project. I’m using IAR 9.50.1 as the IDE.I’ve tried everything, but nothing works. I’ve cleared all the required flags, set the others, but I still can’t get it to wake up from an alarm. I’ve been able to wake the MCU using the user button and another wake-up pin, but not via alarms.This is the code I’m currently working with: main.cAnd this is an auxiliary rtc.c file used to initialize the RTC: rtc.cAll the important flags seem to be set correctly. For example, in RTC_SR: ALRAF/ALRBF/WUTF/TSF/TSOVF/ITSF/SSRUF = 0. In RTC_CR: ALRAIE = 1 and ALRAE = 1. In RCC_BDCR: RTCEN = 1.In PWR, all WUFx flags are clear.I’m also attaching the current values of the RTC, RCC, and PWR registers

Hi, am new to STM32 and i am trying to configurate my Nucleo but i don't understand my problem i am trying to setup a basic blink code with the basic structure (serial port communication with putty , debugger stlinkv3 and communication between cores but i can manage to ger it right thank you for any help or advises)my problem is i cant manage to setup a basic ioc files configuration  for my stm32h755zi-q in the stmcubeide 1.18 i have a basic blink code using both core that work but when i try to setup whit other clock parameters configuration i cant manage to start the program (stlink v3 on the bord look like i cant connect)

Hi all,I’m currently working on a wireless mesh network project using the S2868A2 expansion board with the NUCLEO-U083RC, operating in the 868 MHz ISM band.This system is designed to be low-power, which is why I’ve selected the Sniff Mode (LDCR) feature of the S2-LP. My goal is to achieve a reliable connection with >200 m LoS range, but currently, I’m seeing packet drops even at short distances (50–60 cm).I’ve been debugging this issue for the past few months without much success. I’d really appreciate it if someone could help review my firmware setup and configurations, or share best practices for using sniff mode effectively.This post is organized as follows:A brief system overviewS2-LP parameter configurationsIssues observedDebugging steps and tests performed1. Brief System Overview I have used the X-CUBE-SUBG2 to communicate with S2-LP hardware.Each node acts as a transceiver, toggling between TX and RX.This setup is based on SDK_Sniff_A/B examples from ST.I’m using st

Hello everyone,I am doing a project of sampling a PWM signal and reproduce it dynamically using the HRTIM. The following code:uint16_t oldPer = 0, oldDur = 0, update = 0;uint16_t newPeriod = 0;uint16_t newDuration = 0; void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim){  if (htim->Instance == htim2.Instance && htim->Channel == HAL_TIM_ACTIVE_CHANNEL_1)    {    newPeriod = HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_1);    newDuration = HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_2);     if (oldPer > (newPeriod + 100) || oldPer < (newPeriod - 100))    {                     HRTIM1->sTimerxRegs[HRTIM_TIMERINDEX_TIMER_A].PERxR  = newPeriod;       update++;    oldPer = newPeriod;    }    if (oldDur > (newDuration