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I want to enable the UART communication in MCSDK software which is very time critical task, i enabled UART with DMA, the problem is it cannot transmit more than 2 bytes even if i give 3 or more for transmission HAL_UART_Transmit_DMA(&huart3, buffer, 3); I get the call back  void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart) { uartransmissioncomplete = true; } after every 2 bytes.  I tested the same program only with UART it works fine transferring more bytes. So, can i just go ahead with transmitting 2 bytes for every call back function, or will i really be able to transfer more bytes in the complete project, since i don't want to disturb the main functionality, i want UART data for data logging. 

I’m using an STM32 board to drive an SSD1322 128×64 OLED display with my own driver library. It used to work fine without issues. Without changing the code, the display suddenly became completely unresponsive. - Power supply shows 0A current draw (normally it used to pull around ~0.3A).- During debug, I noticed something strange: inside MX_GPIO_Init() the code enters, but it hangs atGPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; and never progresses beyond that line.I double-checked all hardware connections multiple times, nothing seems wrong.When I swapped to another STM32 board of the same model, everything worked again without any changes.This makes me suspect a hardware fault on the original board (possibly ESD damage). My questions:- What should I

Hello, I am a member of Illinois Institute of Technology's professional organization Drone Development Air Sports Organization (DDAO). We are currently looking for a mentor to teach or assist us in learning how to use the STM32 Nucleo board. First, we are trying to understand how to work with STM32 and how to interact with it. Here is the list related to what we need to do regarding this “milestone”:Learn how to setup the environment , which is STM32CubeIDE, as well as connecting ST-Links etc.Understand the architecture of STM32 and its configurations.Learn how to retrieve data from sensors and users I/O devices ( such as buttons, sliders, etc. ).Learn how to display data on the OLED screen, for debugging OR monitoring purposes.Learn how to communicate with external sensors or modules using I2C, SPI, UART.Second, we want to understand how to contr

Hello everyone, I'm developing a secondary bootloader (sboot) based on the STM32F429 chip, aiming to achieve "program updates without a programmer" — simply placing the compiled application file on an SD card allows the microcontroller to automatically load and run it upon power-up, greatly simplifying debugging and update processes. Currently, I'm using Cube IDE for development, with the following hardware configuration: Main controller: STM32F429 (internal Flash stores sboot; internal SRAM starts at 0x20000000 with a capacity of 256KB)External storage: Kioxia 64GB SD card (connected via the SDIO bus, used to store the application program boot.bin)External memory: 32MB SDRAM (starts at address 0xC0000000, driven by the FSMC controller, used to load and run boot.bin)Functional Process DescriptionThe sboot is 固化 (burned) in the STM32's internal Flash. Upon power-up

I am officially confused.I'm trying to use an ADC without the HAL layer, and for some reason I just don't get it to work. With HAL, it works fine.I have tried comparing register contents, and I've now run into a wall. There must be something the HAL function is doing that I am missing or misunderstanding.In this test, I am trying to sample ADC2, channel 16, just once, without DMA or anything. With my own code, ADCSTART never goes low after I've started the ADC.When I check what the HAL code does differently, I simply don't get it.The HAL setup code (which works): ADC2Handle->Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1; ADC2Handle->Init.ContinuousConvMode = DISABLE; ADC2Handle->Init.DMAContinuousRequests = DISABLE; ADC2Handle->Init.DataAlign = ADC_DATAALIGN_RIGHT; ADC2Handle->Init.DiscontinuousConvMode = DISABLE; ADC2Handle->Init.EOCSelection = ADC_EOC_SINGLE_CONV; ADC2Handle-&

Hello, when I was running the code generated by SDK6.4.0 on STM32G431CBT6, I found that my motor was not working properly. So I grabbed the PWM output generated by Timer 1 and I want to know what caused this

I'm trying out semihosting with openocd in STM32CubeIDE.  For this purpose I added the call initialise_monitor_handles(); in main.c as the second call after HAL_Init(); I have STLINK(gdb server) configured. The program goes into that call (initialise_monitor_handles) but never returns. Trying OpenOCD gives another error:Open On-Chip Debugger 0.12.0+dev-00623-g0ba753ca7 (2025-04-30-14:20) [https://github.com/STMicroelectronics/OpenOCD] Licensed under G

Hello,I am working with a BLDC motor in sensorless mode using ST Motor Control Workbench and Motor Pilot.When I press the Start button in Motor Pilot, the motor status changes to Running based on the target speed I set, but the motor shaft/wings do not actually rotate.Additional observations:The motor is not in a locked condition (not drawing stall current).If I try to manually rotate the motor during startup, it still does not continue spinning.On Motor Pilot, the motor state shows Running, but physically it is stationary.My Questions:Why does the motor state show Running while the rotor is not moving?How can I debug this issue further to ensure proper startup in sensorless mode?Any guidance or suggestions will be greatly appreciated. Thank youBest R

Hi,I tried to bring up the USB host on the USB-A connector, but without success.As a starting point, I took the example project:STM32CubeN6\Projects\STM32N6570-DK\Applications\USBX\Ux_Host_DualClass (for the USB Type-C connector), replaced USB1 with USB2 throughout the code, and enabled the USB power switch via GPIO.The device receives 5V, but no USB2 interrupt is triggered.Below is my USB2 initialization. In line 18, I triedRCC_USBPHY2REFCLKSOURCE_HSE_DIRECT, and RCC_USBOTGHS2CLKSOURCE_HSE_DIRECT,but neither case works.It seems I’m missing something else. What could be wrong on my side?void HAL_HCD_MspInit(HCD_HandleTypeDef *hhcd) { if (hhcd->Instance == USB2_OTG_HS) { /* USER CODE BEGIN USB_OTG_HS_MspInit 0 */ /* USER CODE END USB_OTG_HS_MspInit 0 */ /* Enable VDDUSB */ __HAL_RCC_PWR_CLK_ENABLE(); HAL_PWREx_EnableVddUSBVMEN(); while(__HAL_PWR_GET_FLAG(PWR_F

I am connecting NUCLEO-H743ZI2 to PC via USB, it gives the following error:The interface firmware FAILED to reset/halt the target MCU STM-32List possible solutions to the above error.

Hello,I am currently working with the STM32N6570-DK and am studying several official example projects from ST's GitHub repositories. The projects I'm looking at are:ObjectDetection: https://github.com/STMicroelectronics/STM32N6-GettingStarted-ObjectDetection/tree/mainPeople Detection and Tracking: https://github.com/STMicroelectronics/x-cube-n6-ai-people-detection-trackingHand Landmarks: https://github.com/STMicroelectronics/x-cube-n6-ai-hand-landmarks/tree

Hello,I am using on my board STM32H755XIH6 CPU and I connected the SMPS feature.The board voltage is 3.3V, the SMPS regulate the voltage to 1.8V and supplies the LDO.I am using VOS1 and right now it's working WELL at room temperature.I measured the VLXSMPS and I want to be sure if the overshoot and undershoot is ok?can the component be damaged from this overshoot and undershoot?can you explain to me why I see this?

Hello, I am working on an STM32F446RE with a custom bootloader and FreeRTOS application. Bootloader address: 0x08000000 Application address: 0x0800C000 The bootloader successfully jumps to the application by setting MSP, PC, and SCB->VTOR. In my application, I configured FreeRTOS to use a hardware timer (TIM14) instead of SysTick as the OS tick source. Problem:When I flash the application directly, it runs fine.But when I run through the bootloader, the application stops working as soon as it calls HAL_Delay(). If I comment out HAL_Delay(), the app continues normally. After the RTOS kernel starts, I get a HardFault on the first interrupt. I suspect this is related to SysTick still being dirty from the bootloader, while my application is configured to use TIMx as the tick source.

Hi ST,I'm working with the STM32MP257FAI3 Processor and have some concerns regarding DQ bit swapping between the SoC's DQ lines and the DDR4 RAM DQ lines.I'm already aware of the guidelines document mentioned in this solution.From my understanding of the document,DQ bits within a byte lane and DQ byte lanes are invariant in a device, allowing for appropriate swapping. However, the DqxLnSel registers should remain at their default values.This applies to DDR4, and there i

Hello,I am experiencing a consistent connection issue with my development setup:Hardware/Software Configuration:MCU: STM32 (exact model: STM32G474VET6)Debugger: STLINK-V3IDE: STM32CubeIDEProgrammer: STM32CubeProgrammerOperating System: WindowTarget board : Custom boardart of custom board schematics : 

 I'm already achieved a USBX-MSC class, and also a FileX in MCU local.I know that using two file systems at the same time is not recommended, but still have some questions. 1. I implement the ux_deveice_msc.c as followed. Use PC-Windows to create a file such as my_test.txt to U-DISK, successfully and the local FileX will see the new file immediately.   UINT USBD_STORAGE_Read(VOID *storage_instance, ULONG lun, UCHAR *data_pointer, ULONG number_blocks, ULONG lba, ULONG *media_status) { UINT status = UX_SUCCESS; /* USER CODE BEGIN USBD_STORAGE_Read */ UINT fxStatus = FX_SUCCESS; while (number_blocks--) { fxStatus = fx_media_read(sdioDisk, lba, data_pointer); if (fxStatus != FX_SUCCESS) { status = UX_ERROR; break; } data_pointer += sdioDisk->fx_media_bytes_per_sector; lba++; } /* USER CODE END USBD_STORAGE_Read */ r

ST moderator: Thread moved from "STM32CubeIDE" forum to "STM32 MCUs Embedded software" forum. Hello, I am currently working on STM32H755 (dual-core M7/M4) and trying to use the FMC interface to connect to an external SRAM. I have checked the STM32CubeH7 firmware package, but I could not find any ready-made FMC SRAM example for STM32H755 (most examples for STM32H745). I have checked the STM32CubeH7 firmware package,and it seems that for STM32H745 (and STM32H755) there is only an FMC SDRAM example available,located under: STM32CubeH7\Projects\STM32H745I-DISCO\Examples\FMC\FMC_SDRAM_DataMemory Could you please provide: An official or working example project for STM32H755 FMC SRAM Clarification about which core (M7 or M4) should configure the FMC?

您好，我已经在STM32G431上成功配置了 6.4.0 SDK 包。 但是，当我按下按钮并开始预充电过程时，报告了硬件故障。 如果我在预充电过程中将上侧 PWM 波的刻度值从 0% 更改为 90%，程序将在 RUN 后进入 STOP 状态，然后进入故障状态。故障代码为 40，定义为 #define MC_BREAK_IN （（uint16_t）0x0040） /**< @brief 错误：紧急输入（过流）。 */ Post edited by ST moderator to follow the community rule which is using English language. So in next time please use English as it's an international community and to let others to understand your post. Thank you for your understanding. Translation: Hello, I have successfully configured the 6.4.0 SDK package on my STM32G431. However, when I press the button to initiate the pre-charge process, a hardware fault is reported. If I change the duty cycle of the upper PWM waveform from 0% to 90% during the pre-charge process, the program enters a STOP state after running, and then enters a fault state. The fault code is 40, which is defined as #define

The ASM330LHH datasheet CTRL3_C (12h) says:Note: The accelerometer must be ON. This bit is cleared automatically. This bit is cleared automatically. Does ON for the accelerometer mean that ODR_XL[3:0] in the CTRL1_XL (10h) register is set to a non-zero value?

Hi There is a file path window on the Erasing&Programming page.I would like to reset the history because the path history increases every time I change the file I write.Is there a way to reset the history? STM32CubeProgrammer Version:v2.16.0OS:Windows11Regard

Good morning everyone,I’ve encountered some unexpected behavior while debugging my application. I’m trying to connect to an MQTT server and publish a message using the embedded Ethernet port, LwIP, and FreeRTOS. I’m developing with CLion IDE and CMake.Issue description:Every time I set a breakpoint somewhere in the MQTT-related code (located in freertos.c) and click the “Step Over” button, the debugger opens a new tab with stm32f7xx_it.c and jumps into the global Ethernet interrupt handler. Before I added FreeRTOS to the project, debugging worked as expected. As a result, I’m no longer able to debug my application properly.Do you have any idea how I can change this behavior?PS: I’m not sure if this issue is related to my IDE, OpenOCD, or another part of the toolchain, which is why I decided to post here.

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Hi all,I’m working on a project using an STM32F407 and running into issues with low-power modes. I can put the MCU into STOP mode successfully, but when I try to wake it up with an external interrupt (EXTI line on a GPIO pin), nothing happens. The device just stays stuck until I reset it manually.Here’s what I’ve tried so far:Configured the EXTI line with rising-edge trigger.Verified the interrupt works fine when the MCU is running normally.Enabled the corresponding NVIC interrupt before entering STOP mode.Added __WFI() after setting STOP mode in the power control register.Despite this, the MCU never wakes up when the pin is toggled. I must be missing something in the clock or power configuration, but I can’t figure it out.Has anyone dealt with this before on STM32F4 (or similar STM32 family)? Any pointers on debugging wake-up sources in STOP mode would be a huge help.Thanks!

It seems like the program is getting stuck in the Error_Handler loop and not coming out. Could there be a problem with my code? /* 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" #include "can.h" #include "usart.h" #include "gpio.h" /* Private includes --

Hi all,I'm trying to use the partial frame buffer feature and I get the first two partial frames (40 lines), but TouchGFX does not seem to update the screen into the partial buffer.  Just using TouchGFX no DMA, and no ChromArt. My home screen is :But the LCD only displays