STM32 MCUs Embedded software

Hello,I need to connect SD card to STM32H5 device. CubeMX does not support fatfs I was using in the past, but only ThreadX and FileX. We decided to use this as STM32H5 seems like a good choice for many future projects.So we connected the SD via SPI.My understanding is that I need to enable Custom interface like this: And than implement several low level functions in FileX/Targer/fx_stm32_custom_driver.c. This looks like this should be common task, but I could find no examples anywhere. Is there something I could use or at least some useful documentation regarding the custom driver?Thank you Jeronym 

Hi,I have spent the last two days trying to build a demo application that connects a B-L475E-IOT01A1 to AWS.However, I keep finding that the demos will not build due to it needing an old tool chain.The documentation for the board on how to run AWS FreeRTOS, is from 2018 and references older AWS free RTOS version, none of the STM documentation tells you how and where to download source code from.The AWS help on FreeRTOS has not helped. Most available documentation appears to be deprecated.So the bottom line is:"Is there a definitive, step by step, guide on how to set up and run an AWS demo on a B-L475E-IOT01A1?"I would prefer to use STM32CubeIDE, however, to get myself out of a death spiral I'm prepared to try another tool chain.Or am I wasting my time?ThanksJorgie 

[moderation:] Please see How to write your question to maximize your chances to find a solution, How to insert code [/moderation] I am trying to generate a sbus signal for radio transmission in drones. imhave tried this code. in oscilloscope, uart output is showing, but qgc is not detecting sbus. i do pass a 16 channel array to convert into sbus. the project is as below:-  /* 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 COD

I am trying to flash BSP example from https://github.com/STMicroelectronics/STM32CubeU5/tree/main/Projects esp. the ones for STM32U5A9J-DK. While trying to compile BSP : https://github.com/STMicroelectronics/STM32CubeU5/tree/main/Projects/STM32U5x9J-DK/Examples/BSP, I am not able to get a compiled binary to flash. Tried following ways to import the checkout code in STMCubeIDE -1) "Open project from file system" or "Import -> Projects from Folder or Archive" - Build not enabled2) "Existing project in workspace" -> "Copy project in workspace"Errormake -j8 allmake: *** No rule to make target '/Utilities/lcd/stm32_lcd.c', needed by 'Utilities/stm32_lcd.o'. Stop.3) "Import" -> "File System"Cannot import into a workspace with no open projects. Please create a project before importing.what is the first way to get these examples build and flashed. 

I'm trying to get USBX MSC working in standalone mode on the STM32H573I Discovery board.I've come across a few tutorials for setting up USBX in VCP  mode and have attempted to adapt them for MSC, but I haven’t been able to get the USB to enumerate properly. My background is in electronic hardware design, so this software side is quite new to me.Are there any tutorials specifically for setting up USB MSC in standalone mode that I can follow? Alternatively, are there any example projects available?Thank you

 Hi ST Community,I'm working with the STM32U5G9ZJT6Q and need to send real-time data from DCMI over USB through CDC . I generated a CDC-ACM project using CubeMX 6.14.0, and by default, it appears as a Virtual COM Port under device manager . Then i used Zadig to replace the driver with libusb-win32, and now the device shows up under libusb devices, ready for high-speed (HS) USB communication.However, all CDC-ACM examples I’ve found using with UART, which doesn’t meet the performance needs for my video streaming use case.I’m requesting a sample project or reference code using the STM32U5 USB stack, where CDC-ACM works with libusb (HS mode) and does not rely on UART, so I can send DCMI data directly over USB.thanks,

Hello everyone,I have a project using the STM32H7, using FreeRTOS and with a FatFS (ChaN) runnin on a 4GB eMMC (Kingston), using peripheral SDMMC1.Normally everything works fine. SDMMC1 and FatFS (FAT32) are initialized at main, before OS, and is used later on for many things such as creating and writing/reading files, etc.However, we found some devices that were working fine and suddenly (after a couple of thousands of writings in the eMMC, I'd assume not too intense) we start having a constant and reproducible error. What happens is that the FatFS initializes OK but as soon as we want to write something (still at main, before OS), it fails. Basically when trying to open a file (that already exists) it fails with FR_DISK_ERR and we cannot use the FatFS anymore. Trying to debug a bit, I saw that on the lowest level HAL_MMC_ReadBlocks (from stm32h7xx_hal_mmc.c) is failing with HAL_TIMEOUT.However, if I send a "reset" command to our device (it basically just executes a __NVIC_SystemReset

I have stm32cubeIDE version 1.17.0 and I'm not able to import this project and build it: https://github.com/stm32-hotspot/USBD_Composite_STM32H503

I'm starting a project on the STM32U5G9, and one feature we want is USB connectivity, just a simple virtual COM port (CDC class).  Looking at the Middleware picker in CubeMX, the only USB-related items are USBPD (don't need Power Delivery at the moment), and USBX, which is the ThreadX/Azure RTOS USB stack.  If I look for CubeMX examples for the STM32U5G9J-DK2, the only USB examples offered are for ThreadX and USBX.Is it reasonable to assume that if I don't want to be writing my USB application from scratch on the STM32U5, I should be using ThreadX/Azure RTOS instead of FreeRTOS?Dana M.

Hi All, I had the need to use the independent watchdog timer and rather than a straight reset of the system I wished to put the system into a fault mode. You can do this by examining the RCC control and status register (CSR) viz:   int main(void) { /* MCU Configuration--------------------------------------------------------*/ /* TODO: */ /* Reset of all peripherals, Initializes the Flash interface and the Systick. */ HAL_Init(); /* Configure the system clock */ SystemClock_Config(); MX_USART2_UART_Init(); checkIWDG(); #if(IWDG_ENABLE == 1) void checkIWDG(void) { if(RCC->CSR & RCC_CSR_IWDGRSTF) { /*** FAULT MODE ***/ /* The IWDG has reset the system */ printf("IWDG Reset\n\r"); /* Run fans flat out */ GPIO_InitTypeDef GPIO_InitStruct = {0}; __HAL_RCC_GPIOA_CLK_ENABLE(); /*Configure GPIO pins : PA9_FAN1_POWER_Pin PA10_FAN2_POWER_Pin */ GPIO_InitStruct.Pin = PA9_FAN1_POWER_Pin|PA10_FAN2_POWER_Pin|PA11_TEST_OUTPUT_Pin|PA6_TIM3_CH1_FAN1_SPEED_DEMAN

Hello, I've bought Riverdi board and I'm developing a code that uses Ethernet and act as TCP server.   The code sends "Hello word %d", i++ every 10ms on that TCP socket and it works fine,   but when I try to send some byte on client size it goes to HardFault:   Can some one help me ?   it is related to HardFault_Handler when enable LWIP and touchgfx - Page 2 - STMicroelectronics Community

Hello, I am working with an STM32F769I-DISCO board and trying to implement functionality that allows switching between USB Host and Device modes via a button press. I have configured the board for OTG/Dual Role in STM32CubeMX, but I did not enable the Middleware for USB Host or USB Device, so I need to manage the switching at the register level and using HAL APIs. I would appreciate any advice or code examples for properly managing this switch: Initialization: How should I correctly initialize the USB peripheral to support both modes (Host and Device)? Mode Switching: What are the recommended steps to deactivate one mode and activate the other without causing conflicts or stability issues? Specific APIs and Registers: Are there specific HAL APIs to use, or do I need to manipulate the registers directly? If so, which are most relevant for this purpose? I've attempted to implement a basic switch using HAL_PCD_Stop() and HAL_HCD_Start(), but I'm not sure if this is the best approa

I need to implement the SNMP V3  protocol using the NUCLEO-H755ZIQ Board with AZURE RTOS.   Provide any document regarding to this one.

I have seen linker scripts like this:MEMORY { RAM (xrw) : ORIGIN = 0x200000C0, LENGTH = 32K - 192 /* 192 for vector table */ BOOTLOADER (rx) : ORIGIN = 0x08000000, LENGTH = 4K FIRMWARE (rx) : ORIGIN = 0x08001000, LENGTH = 256K - 4K } /* Main app start address symbol */ _main_app_start_address = 0x08001000;with multiple DRY issues.After trawling through linker script documentation, I came up with the following alternative:/* Entry Point */ ENTRY(Reset_Handler) BL_ORIGIN = 0x08000000; BL_SIZE = 32K; FW_ORIGIN = (BL_ORIGIN + BL_SIZE); ... /* Memories definition */ MEMORY { ... BOOTLOADER (rx) : ORIGIN = BL_ORIGIN, LENGTH = BL_SIZE FIRMWARE (rx) : ORIGIN = FW_ORIGIN, LENGTH = 256K - BL_SIZE } ...where the symbol FW_ORIGIN can be used straight from c, e.g. using:extern uint32_t FW_ORIGIN[]; const uint32_t FIRMWARE_START_ADDR = (uint32_t)FW_ORIGIN;I did not see this suggestion anywhere when looking for ways to do this (using search terms like the title of this post), and it works,

Does STM32N6570-DK support TCP protocol? I want to create TCP server on the board and send/receive data over 1Gbit Ethernet. How can ı do that?I didn't see the NetXDUO Protocols under NETX Middleware. It seems like it is not configurable to open UDP/TCP or ICMP protocols in this board. Also there is no any example or application avaible about that.  

Hello, today I received a stm32f746-disco board and I immediately coded with the external flash memory that I used on my stm32f750-disco, the problem is that the code doesn't work and I can't debug (before this was easy to do on the f750), after testing I found out that I flashed to its external chip and they are different: n25q128 for the f750 and w25q128 for the f746. My question is whether their external flash memory configuration is the same or do I have to create another project for the stm32f746-disco?Here is the video tutorial I used 

Hi Team,Can you please share the any reference code for Bootloader over a Serial communication UART protocol please ?

Seems like transparent background is ignored in final blending, any suggestions will be wellcome.If key-coloring is changed on L2, background color will be shown, so I expect the key-coloring is actually working.L1 has a background picture, and is not updated.Changing L2 alpha from 0xFF to 0x80, normal blending showns both L1 and L2 in correct format, so data seems to be correct picked up.L2 is updated pr. frame, double buffered, and is shown flawlessly but L1 is not visible, when L2-alpha is 255. All Frame-buffers are in internal RAM and each in it's own RAM-bank alligned to 32 byte boundery.    

Hi all,I'm working on an STM32F411 project using STM32CubeIDE (bare-metal, no HAL). I'm setting up a 1ms tick using SysTick_Config() and defining my own SysTick_Handler() to keep a millisecond counter. Here's the issue:When I increment a static volatile global counter inside the handler using '++', the system crashes and ends up in Default_Handler. But strangely, if I assign a constant (e.g. millis = 123;), it works perfectly fine. Moreover, if I increment a local temp variable and increment millis, it'll take it just fine. Here's my code snippet. I'm not using the HAL library for this. Would you know why this would be? I'm using an STM32F411CE6 black pill.Thanks! static volatile uint32_t millis = 0; void SysTick_Handler(void) { // This works: // millis = 123; // This works as well: uint32_t tmp = millis; tmp++; millis = tmp; // This causes a crash into a forever loop in default handler: millis++; (void)(SysTick->CTRL); // Clear COUNTFLAG } // SysTick is initialized like

I am currently working on a project where I'm designing a keypad to send HID commands over USB. Now, I want the keys to register as if a keyboard was connected and a a rotary encoder to control mouse scroll wheel operations. To confirm, is this possible with a composite class such that it enumerates as a keyboard+mouse? Also, if anyone has experience with HID, is it possible to send power commands from the STM to the computer if a key is pressed?

I was reading this conversation and found the comment about an example showing support of Audio Class with USBX and ThreadXhttps://community.st.com/t5/stm32-mcus-embedded-software/has-anyone-managed-to-get-a-usbx-audio-device-working-on-stm32/m-p/112225/highlight/true#M5290For some reason, the example is disappearedIs there a reason on why it has been deleted? Is there a way to get it?

Hello friends I don't know what to do and I'm going to ask for help, in my project I use SPI and Full-Duplex mode with the following configuration which works perfectly in this mode. My problem is that I need to use Half-Duplex mode because on hardware I have output data from AD7686 connected to the MOSI pin which I need to read using DMA which is triggered by a timer. Here is the configuration which works for me but only in Fuul-Duplex mode. Timer 2 is used to trigger DMA and the CH1 output generates the CNV signal for the AD7686 SET_BIT(SPI2->CR2,SPI_CR2_RXDMAEN);HAL_DMA_Start_IT(&hdma_spi2_rx,(uint32_t)&(SPI2->DR),(uint32_t)U_RX_buf,U_RX_BUF_SIZE);__HAL_SPI_ENABLE(&hspi2);HAL_DMA_Start(&hdma_tim2_ch1,(uint32_t)&tx_buffer,(uint32_t)&(SPI2->DR),1);HAL_TIM_PWM_Start(&htim2,TIM_CHANNEL_1);__HAL_TIM_ENABLE_DMA(&htim2,TIM_DMA_CC1);

Hi!I'm working on a project with an STM32 microcontroller and need to set up a way to update the firmware remotely. The device will be installed in remote locations so I won’t have physical access once it's deployed.What’s the best way to approach this on STM32?Any tips or examples would be really helpful.Thanks!

Hi, I'm using the ADC1 of the STM32H563 and I'd like to configure an offset (64) for all 12 of my analog channels. I'm using GPDMA1 to obtain an array of 1200 values ​​at 100 kHz. When I configure the offset (before starting the conversion), I don't see the offset subtraction : Here is my configuration: Can you help me please? Ghislain  

Hello, I’m currently working with the Nucleo-767ZI board and attempting to connect it to an HTTPS client to send raw sensor data to my Google Trust-based database. However, I’ve been facing issues during the TLS handshake, and neither read nor write operations are functioning correctly. The setup involves using DHCP along with LWIP, mbedTLS, RTC, and SNTP. Despite checking various possible causes—including checksum errors and other protocol-related configurations—the problem persists. I’ve already generated and included the required CA certificates (including both intermediate and root certificates), but the issue remains unresolved. Could you please guide me on any possible solutions or processes that might help me achieve the desired outcome? Best regards,Thumula Bhargav