STM32 MCUs Products

HiAnyone interested in having a copy of the material can contact us. Contents list includes: Unit 01 - Introduction to C Programming Unit 02 - Getting Started With GPIO Unit 03 - Getting Started With EXTI Unit 04 - Digital Interfacing (I) Unit 04 - Digital Interfacing (II) Unit 05 - Serial Communication (I) Unit 05 - Serial Communication (II) Unit 05 - Serial Communication (III) Unit 06 - Analog Interfacing (I) Unit 06 - Analog Interfacing (II) Unit 07 - Counter and Timer and PWM Unit 08 - Polling and Interrupt and DMA Unit 09 - Getting Started With RTOS (I) Unit 09 - Getting Started With RTOS (II) Unit 10 - Getting Started With FSM Unit 11 - Getting Started With Sensors (I) Unit 11 - Getting Started With Sensors (II) Unit 11 - Getting Started With Sensors (III) Unit 12 - Build an IOT System (I) Unit 12 - Build an IOT System (II) Unit 12 - Build an IOT System (III) Un

Hello everyone, I'm using the USART 1 of the STM32U375-KG. Regarding this I have two questiones:1.)  Can I use UART CTS (clear to send) and DE (driver enable) at the same time? In the device configuration tool I can only select "CTS only" or "Hardware Flow Control (RS485)".Backgound: I'm implementing a hart driver for the DAC8740H. For the UART control there are two pins "CD" and "RTS". The protocol is half duplex. I'm only allowed to send data, if "CD" is low. Thus this pin works like standard RS232 CTS. The RTS pin enables the TX driver. Thus this pin works like RS485 DE (driver enable). 2.)  I'm using the USART 1 with a GPDMA to receive data. It happens that I get a parity error or framing error from time to time (that is correct). In the USART interrupt the Rx transfer and the DMA will be ended. Is there a way to avoid that or do I really have to restart the DMA transfer with "HAL_UART_Receive_DMA(*)"? Kind regards,Nico Code where RX is ended: stm32u3x

Hello ST Community,I’m looking to upgrade the MCU on an existing board originally designed around the STM32F769 (LQFP176 variant). I’d like to know:1. Is the STM32H743 or H753 (LQFP176 package) **pin-to-pin compatible** with the STM32F769 such that it can serve as a drop-in replacement?2. What changes are needed in the **power supply circuitry**, given the F7 uses the BYPASS_REG pin while the H7 uses integrated LDO/SMPS and software-based regulator control?3. Are there other design considerations I must be aware of when making this change (e.g., bootloader, clock configuration, peripheral differences)?I’ve already reviewed the migration guide AN5293, but I’d appreciate any practical insights or caveats.Thank you!

Hello,I am currently learning low level embedded programming, which lead me to try to extract the data used to generate the table 51 of the document RM0394 Rev 5. I would use this data to generate C++ code. Is the raw data of this table is publicly available somewhere in a format machine-readable?I already managed to extract the data from this PDF, but as this extracted text loses its references, I'm unable to tell what entry corresponds to what exact MCU series.Thank you for your help!

I write six 32-bit floats to RAM every 10 µs (100 kHz) via DMA. I batch and flush every 10 ms → 1000 samples × 24 B = 24 kB per block → 2.4 MB/s average.RAM buffers: planning double/triple buffering (48–72 kB) in SRAM1/2 (CCM isn’t DMA-accessible).SPI SD card path:• Is ~2.4 MB/s sustained feasible over SPI-mode SD on F407?• Proven settings welcome: SPI clock, DMA, FatFs multi-block writes, file pre-allocation, 4–32 kB write chunks, f_sync cadence, and buffer size to ride out SD write stalls.• (I know SDIO 4-bit is safer; I’m asking specifically about SPI-mode viability.)USB path:• USB FS (12 Mb/s) can’t sustain 2.4 MB/s payload.• With USB HS (480 Mb/s + external ULPI PHY) it should be easy: 24 kB every 10 ms is ~4.5% bus.• Any working configs for CDC vs raw Bulk, 512-B packets, TX FIFO sizing, DMA double-buffering, and host side (WinUSB/libusb/Matlab) readers?Fallbacks:• Quantize to Q15 (int16) → 12 kB/10 ms = 1.2 MB/s; FS becomes borderline/possible with careful buffering, or keep flo

I cannot find any timing requirements for SWDIO or SWCLK in the datasheet, STM32L433. Where can I find this information?I don't think there is any cause for concern since I am only connecting the STLINK. However, in mass production, the wiring tends to be longer and the waveforms tend to be smoothed out as a countermeasure against ringing. Therefore, I would like to check the timing constraints explicitly.Thank you

Hello I have a project that uses the STM32F429 chip.Used the ltdc peripheral and spi-dma peripheral,The data of ltdc and spi both come from sdram.For ltdc peripheral,Because I want to use double buffering,I must know when the frame has completed refreshing.i use LTDC Line Interrupt,like thisHAL_LTDC_ProgramLineEvent(&hltdc, VSW+LCD_HEIGHT+VBP);__HAL_LTDC_ENABLE_IT(&hltdc, LTDC_IT_LI);HAL_NVIC_SetPriority(LTDC_IRQn, 10, 0);HAL_NVIC_EnableIRQ(LTDC_IRQn);The interrupt service function is like thisvoid HAL_LTDC_LineEventCallback(LTDC_HandleTypeDef *hltdc){DebugLED1Toggle();HAL_LTDC_ProgramLineEvent(hltdc, VSW+LCD_HEIGHT+VBP);}The LED light is working properly and its frequency is 30Hz,However, the SPI5 DMA function is not functioning properly.// __HAL_LTDC_DISABLE_IT(&hltdc, LTDC_IT_LI);HAL_SPI_Receive_DMA(&hspi5,pBuffer,NumByteToRead);while(__HAL_DMA_GET_COUNTER(&hdma_spi5_rx)!=0){printf("%d ",__HAL_DMA_GET_COUNTER(&hdma_spi5_rx));} printf("\r\n");HA

Hello,I am experimenting on the STM32H45 Discovery Board (Dual Core) to use some GPIOs from different Core-Context.I initialized few Pins only for the CM7 and few dedicated pins only for the CM4. When I perform a debug session, all the mentioned pins are set to HIGH . I went trhough the internal registers and measured the values on the pins (3,3V). Everything seems to be ok.But when I do a power reset (USB cable off and on) and I measure again, I see that all the output pins wich are controlled by the CM4 are LOW. First I thought it is somehow connected to the synchronization process with the hardware semaphores (generated by MxCube), but I removed those parts in order to be sure I am not missing anyhting. The Power-Down call of the Domain2 on the CM4 at the beginning is commented out. But this doesn't solve the problem after a hardware resetWhy does this even happen? I mean the H7 architecture allows you to access most of the periphericals by CM4 and CM7. But this one seems to be stra

Hello everyone, I’m currently experiencing difficulties with setting up CAN communication on my STM32F4 microcontroller. Despite having configured the CAN interface and connecting it to a CAN transceiver, I observe no activity on my designated can_tx and can_rx pins. I have a second node connected for communication testing. /* USER CODE BEGIN Header */ /** ****************************************************************************** * @file : main.c * @brief : Main program body ****************************************************************************** * @attention * * Copyright (c) 2025 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that can be found in the LICENSE file * in the root directory of this software component. * If no LICENSE file comes with this software, it is provided AS-IS. * ****************************************************************************** */ /* USER CODE END Header */ /* Includes

Moved from this thread. HiI'm experiencing the same issue that others have reported with the STM32H755ZIT6. Despite following all the suggested solutions step by step from various forum threads, I’m still unable to debug or run code on my Nucleo board. Every time I try, the board locks, and I have to manually erase the flash by wiring BOOT0 to VDD to recover it. I'm using the latest version of STM32CubeIDE, and I’ve attached some screenshots of my project setup for reference. I’d appreciate any guidance or additional suggestions you might have. 

Hi everybody,I'm trying to set up a communication with a can bus.I'm using a STM32F446. I use PB12 & PB13 (CAN2). I can see RX frames on PB12.I'd like to read frames that I received by using interrupts.I've found this example : https://github.com/STMicroelectronics/STM32CubeL4/blob/master/Projects/STM32L476G-EVAL/Examples/CAN/CAN_Networking/Src/main.cBut, I have put a breakpoint on the interrupt, but it never goes in.static void MX_CAN2_Init(void) { /* USER CODE BEGIN CAN2_Init 0 */ CAN_FilterTypeDef sFilterConfig2; /* USER CODE END CAN2_Init 0 */ /* USER CODE BEGIN CAN2_Init 1 */ /* USER CODE END CAN2_Init 1 */ hcan2.Instance = CAN2; hcan2.Init.Prescaler = 12; hcan2.Init.Mode = CAN_MODE_NORMAL; hcan2.Init.SyncJumpWidth = CAN_SJW_1TQ; hcan2.Init.TimeSeg1 = CAN_BS1_8TQ; hcan2.Init.TimeSeg2 = CAN_BS2_6TQ; hcan2.Init.TimeTriggeredMode = DISABLE; hcan2.Init.AutoBusOff = DISABLE; hcan2.Init.AutoWakeUp = DISABLE; hcan2.Init.AutoRetransmission = DISABLE; hcan2.Init

Hi,couldn't find any STM32 dev kit that has DSI display interface and a demo where it plays video (or at least graphics) directly from SD card using DMA.Which ST dev kit does that? Thank you

Specifically, I require a timer for creating a clock to a peripheral.  I chose PH5 (Timer12 Channel 2) because of the allocation capability in CubeMX, however, the datasheet for the STM32H757 does not show that as an alternate function.I have confirmed that both the CubeMX software and datasheets are the latest versions...My question is, which resource is correct and if the Alternate function is available for PH9, which AF code do I use?  It is not listed anywhere.

Hello,I'm planning to use the STM32F413VGT3 in my project. It says it has three CAN buses. Can I use these three lines independently? Some of my research (ChatGPT) indicates that the third CAN line is not a standard CAN bus. I'd appreciate any clarification on this matter.Best regards.

Hi everyone, I'm stuck on the transition from my low-power mode versus my power consumption.I already have a “sleep.c” code that is capable of putting the device to sleep at 2uA power consumption (which is my goal, everything's fine here).This code exits the low-power mode on RTC alarm. I now wanted to introduce another piece of “run.c” code.“run.c” and “sleep.c” can switch to each other via a soft reset (this logic works fine).But when I run “run.c” once and switch to “sleep.c”, my current consumption in STANDBY is now ~4mA.My clocks in RUN: HSI16MHz, LSI32kHz, PLL64MHz, SYS=PLL64MHzMy clocks in SLEEP: HSI16MHz, LSI32kHz, SYS=HSI16MHz After some research, I noticed that if I align all configurations to HSI16MHz, LSI32kHz, PLL64MHz, SYS=PLL64MHz, I still have a current consumption of ~4mA.But if I align all configurations to HSI16MHz, LSI32kHz, SYS=HSI16MHz, then I reach my goal of ~2uA. I would like to use the PLL anyway in RUN and not in SLEEP for project reasons.It seems that the PL

Hello, I'm using STM32L471 and Micron MT25QL NOR Flash with single SPI interface. MT25 is also connected with other MCU (NRF52) using the same lines. I'm trying to write STM firmware in BOOT0 serial bootloader controlled by NRF using STM's USART3. The firmware is stored in MT25, NRF reads it using SPI, and transfers it to STM using UART.The problem is that when STM booted in bootloader mode, it seems that STM initializes SPI interface with Push-Pull configuration on MISO line. This behavior causes a collision between MISO signal of STM and MT25, the signal level goes intermediate level about 2.0V, and the result is NRF reads FFh.So my questions are:Is there a way to disable STM SPI in bootloader mode?To solve this, I'm considering that NRF keeps STM in reset state while NRF is reading 4KB (e.g.,) from MT25 , then let STM boot with BOOT0=H and write firmware data on its internal flash, repeat it until all firmware is written. Is there any possibility of problems when resetting and

Hi everyone, I'm using STM32G474 with dual-bank Flash enabled (nDBANK = 0) and booting from Bank2 (BFB2 = 1). I'm implementing OTA firmware update by writing to the inactive bank while executing from the active one. The update from Bank1 → Bank2 works fine. But in the second update cycle, when running from Bank2 and trying to write to Bank1 (starting at address 0x08000000), HAL_FLASH_Program() always fails on the first double-word. I have: Verified that Write Protection is disabled (checked in STM32CubeProgrammer) Unlocked Flash properly Erased the target pages beforehand No PCROP or secure area configured on Bank1 Flash error flag is HAL_FLASH_ERROR_WRITE_PROTECTION sometimes (even though WRP is not set) I found some similar cases reported online (e.g. this one) where users mentioned that writing to Bank1 from Bank2 fails silently. Is there an undocumented silicon limitation on STM32G4 when programming Bank1 from Bank2? I would appreciate any official clarification or work

Hi, what is the best way to wake from Low Power Sleep when an Encoder is rotated?I have TIM2 setup in encoder mode and it works when in Low Power Run. I just want to switch back from LP Sleep to LP Run when it's turned. Looking in stm32l4xx_hal_tim.c I have not been able get a solution.This did not work://Wake up from Encodervoid HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim){if (htim->Instance == TIM2){LowPowerSleepToRun();}}I have TIM2 global interrupt set in CubeMX.I have buttons that do this via EXTI, so the LowPowerSleepToRun function works.If you can keep the reply to HAL and CubeMX solutions I would appreciate it.Thanks in advance, Lance.

Hello,I'm having an issue with the STM32L4A6(1Mb) and the dual-bank.First of all, I tried with the NUCLEO-L476 and a simple blink led. It worked fine.Now, my project is based on a STM32L4A6, but the firmware doesn't start in BANK2.For simplicity, I did the same program blink led as for the STM32L476This is what I implemented in SystemInit():VECT_TAB_OFFSET is 0x80000void SystemInit(void) { #if defined(USER_VECT_TAB_ADDRESS) /* Configure the Vector Table location -------------------------------------*/ FLASH_OBProgramInitTypeDef FLASH_OBProgramInit = {0}; //Read all options bits HAL_FLASHEx_OBGetConfig(&FLASH_OBProgramInit); //Check the BFB2 bit if (FLASH_OBProgramInit.USERConfig & FLASH_OPTR_BFB2) SCB->VTOR = VECT_TAB_BASE_ADDRESS | VECT_TAB_OFFSET; else SCB->VTOR = VECT_TAB_BASE_ADDRESS; #endif /* FPU settings ------------------------------------------------------------*/ #if (__FPU_PRESENT == 1) && (__FPU_USED == 1) SCB->CPACR |= ((3

I am using an STM32H747i-Disco board for a time critical application. I would like to periodically output simple text messages to the display.but I don't want to use an RTOS, so TouchGFX is not an option. In LCD.c there appear to be no functions to simply display text at a location on the screen.Do such functions exist? If so where?

Hi, Im new to STM32 and Im writing a bare metal spi library however for some reason when I try to change the SSM bit in code it doesnt seem to work. Im able to change the SSM bit in debug mode. void SPI_Enable(SPI_Com* spi) { SPI1_CLK_EN; //Reset the whole CR1 register if someone decides to enable it using different options //First disable SPI spi->spiReg->SPI_CR1 &= ~(1 << 6); spi->spiReg->SPI_CR1 = 0; //CPOL and CPHA spi->spiReg->SPI_CR1 |= (spi->spiConfig.CPHA); spi->spiReg->SPI_CR1 |= (spi->spiConfig.CPOL << 1); //Master, Slave mode spi->spiReg->SPI_CR1 |= (spi->spiConfig.masterMode << 2); //Set baud rate spi->spiReg->SPI_CR1 |= (spi->spiConfig.baudRate << 3); //MSB or LSB first spi->spiReg->SPI_CR1 |= (spi->spiConfig.isLSB << 7); //Data format spi->spiReg->SPI_CR1 |= (spi->spiConfig.dataFormat << 11); //Software Slave SSM and SSI bits //spi->

Hello All,I have received a PCB which is used in a battery pack that i am working on. Unfortunately the CM does not communicate any more and the last he told me was that they did not flash the devices. The PCB has basic functionalities like displaying battery power via LED lighting, charging battery and discharging and couple of WIFI, BT modules that are connected to the MCU - STM32G0B1CEU6N microcontroller (MCU) Upon looking at the schematic - the PCB has SWD and JTAG.I tried connecting the PCB via ST-LINK-V2 to STM32Programmer but the software does not detect at all.I checked the SWDIO, SWCLK, NRST, GND wiring (made sure they are all correct by checking continuity) gave VDD power input to the 3.3 V input on ST-LINK-V2 but no luck. What i would like to understand is that could this be an RDP issue? where RDP level 1 is blocked and i need to connect via JTAG to enter the MCU and be able to flash it?Thanks for the help..

Hi,I'm trying to program one custom board with STM32G0B1RET using original STLINK V3 and STLINK V2 without succes.My schematic is very simple as you can see on the image: And the response all time is: Not STM32 target found.. if I use SWD port. If I use JTAG the response is:  ST-LINK error (DEV_UNKNOWN_MCU_TARGET)I've revised all the connections, voltages (both on the board and STLINK-V2), capacitors, lowered freq.,etc without success.Also I've tried with Hot plug, Hardware Reset, Power down, Under reset, etc. The log is like this:22:03:41 : ST-LINK SN : 0672FF48557085496709551722:03:41 : ST-LINK FW : V2J46M3222:03:41 : Board : NUCLEO-G0B1RE22:03:41 : Voltage : 0.02V22:03:41 : Error: Unable to get core ID22:03:41 : Error: ST-LINK error (DEV_UNKNOWN_MCU_TARGET)What can be the problem?I've 25 years designing electronics and is not my first board with STM32 devices (the previous one works perfectly) but I've finish all my arsenal of knowledge!Thanks.

I have designed an L476 into a simple controller (BMS) and am trying to use the opamp and ADC and comparators to read the current, and implement a hardware fast overcurrent protection.The opamp is working fine in PGA mode G16. I can see as I inject 20A across the current sensors, the stm pin goes up and down in voltage on my oscilloscope.The ADC is set up in scan mode, with 14 conversions, and the rest of the channels read fine; I am reading lots of thermistors and input/output voltages and such like.The opamp channel is simply returning noise between 475 and 493 counts irrespective of the current I inject (20A injected results in about 100mV shift in the opamp signal)I have replicated this on a very simple sketch: /* Initialize all configured peripherals */ MX_GPIO_Init(); MX_ADC1_Init(); MX_OPAMP2_Init(); MX_TIM3_Init(); /* USER CODE BEGIN 2 */ HAL_OPAMP_Start(&hopamp2); HAL_ADCEx_Calibration_Start(&hadc1, ADC_SINGLE_ENDED); HAL_Delay(100); HAL_TIM_PWM_Start(&ht

I'm trying to program a virgin SYM32G0B1 with the code I've developed and successfully run on the NUCLEO-G0B1RE/NUG0B1RE$AU2 development board. I'm using the STM32CibeProgrammer 2.20.0 software and an FTDI cable (TTL-232RG-VIP-WE with the Vcc line connected to the 3.3 Vdc rail) connected to LPUART1 on port PC0/PC1. I have the BOOT0 signal (PA14) tied to ground.Having no success with my new hardware, I decided to try the development kit as a sanity check, so changed JP2 to use E5V and connected a 5-volt supply. The dev board runs just fine with that. I connected the FTDI cable to PC0/PC1 on CN10, and shorted PA14 on CN7 to ground. Unfortunately, I also cannot program that MCU. The programmer's log shows:16:41:26 : RTS low16:41:26 : DTR Low16:41:26 : Serial Port COM6 is successfully opened.16:41:26 : Port configuration: parity = even, baudrate = 115200, data-bit = 8, stop-bit = 1.0, flow-control = off16:41:30 : Timeout error occured while waiting for acknowledgement.16:41:30 : Error: Act