STM32 MCUs Products

I'm try to generate some pulses to PB0 using STM32F103C8T6 with the following code#include <stdint.h> // STM32F103C8 is a medium density device, hence we use the xB header #include <stm32f103xb.h> #if !defined(__SOFT_FP__) && defined(__ARM_FP) #warning \ "FPU is not initialized, but the project is compiling for an FPU. Please initialize the FPU before use." #endif void enable_clock() { RCC->CR |= RCC_CR_HSION; while ((RCC->CR & RCC_CR_HSIRDY) == 0); } // @formatter:off #define HI 6 #define LO 3 uint16_t buffer[] = { 0, LO, HI, LO }; // @formatter:on void blink_dma_to_gpio() { enable_clock(); // GPIO B configuration RCC->APB2ENR |= RCC_APB2ENR_IOPBEN; // Enable IO port B GPIOB->CRL &= ~(GPIO_CRL_CNF0 | GPIO_CRL_MODE0); // GPIO B: Clear pin 6 configuration GPIOB->CRL |= GPIO_CRL_CNF0_1 | GPIO_CRL_MODE0_0; // GPIO B: Set pin 6 to alternate function push-pull 10MHz output // TIM3 configuration RCC->APB1ENR |= RCC_APB1ENR_TIM3E

Hello, I am currently trying to measure the temperature using the internal temperature sensor of STM32F765. The Reference Manual stated to do temp = ((V_sense - V_25) / Avg_Slope) + 25,but the address of calibration data existed in the Datasheet.In this case, what formula should be used to measure temperature? In my circuit, VDDA is connected to 3.3V, VREF+ is connected to 3.0V and ADC is set to 10bit resolution.Additionally, I referred to RM0410 Reference Manual and STM32F765xx Datasheet.

Hi all,we are designing a product based on a STM32U083. The device is battery powered (not removable) and it can remain in storage for at least 2 years. To reduce battery drain we are putting the mcu in shutdown mode to then wake him up via a button connected to one of the defined wakeup pin. We already implmeneted/tested this mechanism and it works great but we were asking ourselfs if it is reliable and if it will still work correctly even if the device remain dorment for 2 years.Can you please provide some confirmation or additional information about our concernings? Thank you.Stefano

Hi, I am working on a project with the STM32H730. In order to make full use of the onboard memory I have the project set up to load some objects into DTCMRAM. This works, however the binary size is huge, like 403 MB, and subsequently is crashing cube programmer:It seems like something is going wrong here and a huge amount of unnecessary information is getting stored in the binary file. Can you recommend a way to fix this while still using DTCMRAM for data?Here is the DTCMRAM section of my linker file, and how I am allocating objects to DTCMRAM:/* Define output sections */SECTIONS{  /* The startup code goes first into FLASH */  .isr_vector :  {    . = ALIGN(4);    KEEP(*(.isr_vector)) /* Startup code */    . = ALIGN(4);  } >FLASH    .dtcm_ram : {    . = ALIGN(4);_sDTCMData=.;         *(.dtcm_ram) .=ALIGN(4);_eDTCMData=.;        /* create a global symbol at

This is a very basic question.I built a custom board using the STM32L433.After applying power (+3.3V), I checked the NRST pin state, but it did not reach the default voltage.Could you please tell me any possible causes?For reference, I have confirmed the STM32L433's power pin is at +3.3V. I have also confirmed the clock oscillator is operating at 4MHz.Thank you in advance.

Hi,Master:MCU: STM32H743IIQuestion:I configure the MPU for RAM as follows:mpu_set_protection( 0x24000000, MPU_REGION_SIZE_512KB, MPU_REGION_NUMBER1, MPU_REGION_FULL_ACCESS, MPU_ACCESS_SHAREABLE, MPU_ACCESS_NOT_CACHEABLE, MPU_ACCESS_NOT_BUFFERABLE); I found that an unaligned access fault is triggered at the location shown in Figure 1. The address shown in Figure 2 is within the MPU configuration range shown in Figure 3, but I do not understand why the fault is triggered.Thank you very much!

Hi,I have been trying to connect PSRAM and NOR FLASH to STM32H563 nucleo board using Dual-Quad-SPI.I was able to successfully read/write to PSRAM and NOR Flash individually in single-Quad-SPI mode with base address 0x90000000. i'm not clear how the addressing is taken care, when we connect both PSRAM and NOR Flash in dual-Quad-SPI mode.

Hello,On a custom-designed PCB, I am using an STM32H745IIT6 (LQFP176) MCU. I am actively using analog channels, various I/O pins, Ethernet, QSPI, and other peripherals. The code I am using was previously running on an F7 series MCU. It has been fully ported to the H7 version and tested. However, during testing, I noticed an issue with sampling on the PA0 pin, which is configured as ADC1 INP16 in single-ended mode. A total of 19 analog channels are active, and 18 of them show no problems, but on this particular channel I can clearly observe a shift in the raw ADC values.- ADC1-2-3 are running in independent mode, 16-bit, triggered by Timer1.- Data is read via DMA.When I monitor with Serial Wire Viewer (SWV), I observe sampling behavior as shown in the image. The channel where I am experiencing the issue is the red signal shown with the name adc_bc. The other three signals were added for comparison. A single source was used to provide the signal to these four channels. When mon

I am using the STM32H753VI chip, it's on a proprietary PCB but the layout is very similar to the nearest NUCLEO board so I am not ready to consider that the issue.I am working on a very low power application, using CubeIDE but minimal HAL, preferring bare metal. When I execute __WFI() to put the device to deep-sleep, D1 and D2 enter standby (D2 is always standby, actually), and D3 is supposed to stop and allow LPUART1 and RTC to run in autonomous mode (LSE clock). This works exactly as expected, drawing about 250 uA from my power supply (via LDO). The device is set to wake from deep-sleep on LPUART1 RX event. When it wakes, my program can discriminate between the original Power-on Reset and the Wake from Standby. The PWR_CPUCR register is set to 0x1A3, which corresponds to SBF_D2, SBF_D1, STOPF, PDDS_D2, and PDDS_D1 all set, exactly as anticipated.The issue occurs the next time __WFI() is called. As best as I can tell the settings have not changed, but D3 does not appear

I have a project which uses both OPAMPs. For both OA I use dedicated VINM pin.OPAMP1 works correctly.OPAMP2 behaves like the dedicated pin (M2 ball) is not connected to the input multiplexer.I 've tried - mode FOLLOWER: OK - mode STANDALONE, reconnected the signal on the board and used PA7 for VINM: OK - mode STANDALONE, using the dedicated pin: the output is saturated at VDDA.Checked the PCB connection, OK. Checked on 3 boards, identical results.Is it possible it is really a bug in the silicon? What else should I check?(I would like to use OPAMP tag, but it is not available :(  ) Initialization code:(GPIO to analog)LL_APB3_GRP1_EnableClock(LL_APB3_GRP1_PERIPH_OPAMP);LL_OPAMP_InitTypeDef OPAMP_Init;OPAMP_Init.PowerMode = LL_OPAMP_POWERMODE_NORMALPOWER_NORMALSPEED;OPAMP_Init.FunctionalMode = LL_OPAMP_MODE_STANDALONE;OPAMP_Init.InputNonInverting = LL_OPAMP_INPUT_NONINVERT_IO0;OPAMP_Init.InputInverting = LL_OPAMP_INPUT_INVERT_IO1;LL_OPAMP_Init(OPAMP2, &OPAMP_I

Hi,I am working with the STM32F103RCT6. I am writing a bare metal code for delay function using SYSTICK timer. The problem I am facing is that I am not able to write to the ARM cortex registers. Below is my code for your reference - This is the stm32f103xx.h file#define SYSCLK 8000000UL // System clock frequency in Hz #define SYSTICK_BASE 0xE000E010UL // SysTick Structure definition typedef struct { volatile uint32_t CTRL; /* SysTick control and status register offset: 0x00 */ volatile uint32_t LOAD; /* SysTick reload value register offset: 0x04 */ volatile uint32_t VAL; /* SysTick current value register offset: 0x08 */ volatile uint32_t CALIB; /* SysTick calibration value register offset: 0x0C */ } SysTick_TypeDef; #define SYSTICK ((SysTick_TypeDef *) SYSTICK_BASE)This is the function in my main.c - void SystemClock_Config(void) { __disable_irq(); // Disable all interrupts // 1. Enable HSI RCC->CR |= (1 << 0); // HSION = 1 // 2. Wait until HSI is ready

We're using the ADC function built into the STM32F767.The problem is that when the analog signal input to the ADC is around 200mV, the digital value output from the ADC appears to be around 240-260. We're trying to obtain a stable value by collecting 60 of these digital values ​​and calculating a moving average.However, quite often, out of the 60 data points, 20-30 values ​​exceed 3000. Therefore, even when averaging the data, the readings are completely different from the actual analog value.When I measured the input analog signal with an oscilloscope, it was around 200mV +/- 40mV, so I don't think it's due to input signal noise.I suspect there's something wrong with the MCU's ADC settings or program. Please advise on what I suspect.

Hi Team, I am planning to use STM32L476RE MCU for my project, Can I know how to switch between Stop1,2 and low power sleep and run modes? I am new to STM32 and I need a reference code or some guidance to start with, any help very much appreciated. Thanks in advance,CH. Pranathi

We are developing a product that needs the ability to run 3 separate CAN interfaces connected to 3 separate CAN buses.  I have the NUCLEO-F413ZH and I can successfully initialize and start CAN1, CAN2, and CAN3 and transmit from each of them in a single application, but I only get RX interrupts on CAN3 when all 3 interfaces are initialized and started.  Additionally, if I only initialize and start CAN1 or CAN3 in my application, I can transmit and receive from them, but not CAN2.Pages 1076-1077 of the part datasheet/reference manual (RM0430) lists dual and single CAN peripheral configurations:First question: is it possible to run all three CAN interfaces simultaneously and receive messages from each of them?CAN2 doesn't have direct access to SRAM, so I think if I want to use CAN2 for receiving, I also need to enable CAN1.  Is that correct?I don't understand what is meant by the master/slave relationship between CAN1 and CAN2.  It sounds like messages received on CAN2

Hi,Im just getting my new STM32N6570-DK and I try blinking simple led project first with default generate.But when I built and flash it, it got stuck when init UCPD (pic 1), am I missing something ?When I checking seem it still not define yet (pic 2).Thanks  

 Hello everyone, I am using the STM32F042K6 for a small project where I don't have much space. Therefore, I rely on the small package and the "crystal-less USB" function. The hardware arrived today, but unfortunately, I had to realize that the USB library seems to be too large for the chip. I created a new, empty project in CUBE IDE, with only I2C and USB (COM PORT) enabled, and I get the following error message: "c:\st\stm32cubeide_.2.0\stm32cubeide\plugins\com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.10.3-2021.10.win32_1.0.200.202301161003\tools\arm-none-eabi\bin\ld.exe: Test_Project.elf section .data' will not fit in region FLASH' c:\st\stm32cubeide_1.2.0\stm32cubeide\plugins\com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.10.3-2021.10.win32_1.0.200.202301161003\tools\arm-none-eabi\bin\ld.exe: region `FLASH' overflowed by 12 bytes"  This is quite frustrating when it is advertised and then doesn't work "out of the box."

"C5" typo corrected in title to "C0"Does have the STM32C5 and STM32U5 microcontroller documents e.g hardware user manual?Could you please help me to confirm this?

Hi,  I don't understand why CubeMX is limiting me through their IOC file to select an ADC clock below 2MHz. The datasheet says 140 kHz is the minimum ADC clock frequency for the STM32G07. Anyone has any answers or help ?. 

Hello,I had two related questions to clarify - 1. Can multiple Op-Amps be used in the differential mode simultaneously and their output fed to ADC for measuring input DC voltage?2. Also, since the Op-Amps inside the STM32G4 MCU are not rail-to-rail, they only output 0-3.3V for the given input. I am only interested in measuring DC input. Connecting the Op-Amp GND to system ground (0V) would give me the full range of output for DC (NOT 1.65-3.3V, but 0-3.3V), right? Thanks.

Hi all,Board: STM32H745I-DISCOIDE: 1.16.1 I am facing some issues with trying to execute code on the SDRAM. I have a 2nd stage bootloader that loads the user application onto QSPI located at 0x9000 0000. After that, I copy the user application code to the SDRAM 0xD0000000. This part works as verified in the debugger. However when I try to jump to the SDRAM address, my program is not executing. And it seems like the SDRAM has lost connection? Attached below is the image(sdram_becomes_unreadable.PNG) where my bootloader jumped to the SDRAM address but unable to read from the SDRAM. There is no hard fault.. Background: I have tried to load the user application onto QSPI and jump to the QSPI address, my program executes successfully. I have checked my MPU configuration to make sure that SDRAM is MPU_INSTRUCTION_ACCESS_ENABLE. Below is my MPU configuration  void MPU_Config(void) { MPU_Region_InitTypeDef MPU_InitStruct = {0}; /* Disables the MPU */

Hi,I am using LPUART and LPDMA on STM32U575. But I am getting Data Transfer Error.I have tried LPUART with GPDMA it works fine but LPUART with LPDMA giving Data Transfer Error.So I have two questions:1. Can we use LPUART & LPDMA together?2. What will be the cause of Data transfer error and how to configure LPDMA ?Can you please guide me on this?

I was going through the reference manual of STM32G4 series MCU. I saw information on using Op-Amps inside the STM32G4 as Inverting and Non-inverting amplifiers. There was no mention of them used as differential amplifiers, can they be used as differential amplifiers?

Heyho,how can I put a constant at the end of the STM32's used flash? (using: STM32CubeIDE)Not at a specific address (that's not a problem), but I'd like to have a constant always at the end of the used internal flash, independent of any other source code changes.I just find that there's some ASCII characters = "ASCII" (twice) and lots of 0x00 at the end of my H7 and F7 bin files - that from my sources or placed by CubeIDE? Thanks!

Hi, I have problem config LTDC for 1280x720 @60Hz. Without caching it works no problem, but slow. We are using 32MB SDRAM 16bit, config at 100MHz. When we use MPU to cache SDRAM, code as below: ``` MPU_Region_InitTypeDef MPU_InitStruct; /* Disable the MPU */ HAL_MPU_Disable(); // Region 0: All 32MB cached MPU_InitStruct.Enable = MPU_REGION_ENABLE; MPU_InitStruct.BaseAddress = 0x60000000; MPU_InitStruct.Size = MPU_REGION_SIZE_32MB; MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS; MPU_InitStruct.IsBufferable = MPU_ACCESS_NOT_BUFFERABLE; MPU_InitStruct.IsCacheable = MPU_ACCESS_CACHEABLE; MPU_InitStruct.IsShareable = MPU_ACCESS_NOT_SHAREABLE; MPU_InitStruct.Number = MPU_REGION_NUMBER0; MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0; MPU_InitStruct.SubRegionDisable = 0x00; MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE; HAL_MPU_ConfigRegion(&MPU_InitStruct); // Region 1: Last 4MB as non-cacheable for LTDC MPU_InitStruct.Enable = MPU_REGION_ENABLE; MPU_InitStruct.B

In this code I want IDs 0x100 and 0x200 should only be accepted but in my code all IDs are accepted. How to resolve this?/* 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 ------------------------------------------------------------------*/ #include "main.h" /* Private includes ----------------------------------------------------------*/ /* USER CODE BEGIN Includes */ /* USER CODE END Includ