STM32 MCUs Embedded software

Hi, There would appear to be an error in the HAL_CORDIC_Calculate that results in errors when gcc optimsation O3 is turned on. I had the following code:void CORDIC_SineCalcSingleValue(float radiansNorm, float sin) { float angle_q31f; int32_t angle_q31[1]; /* Convert radians normalised over pi to Q31 format */ angle_q31f = radiansNorm * Q_31; angle_q31[0] = (int32_t)angle_q31f; // Convert to Q31 integer format int32_t result_q31[1]; // Output array Cos then Sin /* Calc sine and cos with CORDIC */ if(HAL_CORDIC_Calculate(&hcordic, angle_q31, result_q31, 1, 500) != HAL_OK) /* HAL_MAX_DELAY */ { // Handle error return; } // /* Compiler barrier to prevent reordering */ // __asm volatile ("" ::: "memory"); sin = (float)result_q31[0] / Q_31; // Convert back to float } My theory is the following although nit is probably wrong.This code fails because the HAL_CORDIC_Calculate  argument result_q31 is not specified as volatile by the H

I am working on an audio application which is to be built on a custom board using STM32H723VG and the X-CUBE-AUDIO-KIT V1.1.1.  I have demonstrated a prototype solution using the pre-built AUDIO-KIT binary loaded on the STM32H735G-DK development board and running LiveTune.  I would now like to use AUDIO-KIT and create the similar real application for my target board with STM32H723VG.Being relatively new to the STM32CubeIDE (Version 1.16.00) environment I am unclear how to create a new project using the AUDIO-KIT as a foundation and then altering the BSP for my implementation of the H723.  Can someone please point me to documentation or provide assistance for this?

I configured STM32CubeMX to have a timebase source as SysTick. I'm using this for my scheduler. its running at 1ms. I also configured tim3 for 1ms sortof.But for some reason this will not stay in synch with systick. They are drifting constantly apart.The green lines are racing across my screen. Even though they are 1ms period as well. But obviously they couldn't be. I just don't understand why. Or maybe I have an issue with my data??

hello,everyone,I used STM32CUBEMX+freertos+lwip to generate a project. Pinging 100 bytes was normal. Setting it to 1000 bytes would cause the program to freeze without any lwip error. The LWIP configuration file uses the default parameters. Has anyone encountered this problem before? Can you provide me with a solution?   STM32CUBEM V6.14 STM32 firmware package V1.12.1 LWIP V2.1.2 /*----- WITH_RTOS enabled (Since FREERTOS is set) -----*/ #define WITH_RTOS 1 /*----- CHECKSUM_BY_HARDWARE enabled -----*/ #define CHECKSUM_BY_HARDWARE 1 /*-----------------------------------------------------------------------------*/ /* LwIP Stack Parameters (modified compared to initialization value in opt.h) -*/ /* Parameters set in STM32CubeMX LwIP Configuration GUI -*/ /*----- Default value in ETH configuration GUI in CubeMx: 1524 -----*/ #define ETH_RX_BUFFER_SIZE 1536 /*----- Value in opt.h for MEM_ALIGNMENT: 1 -----*/ #define MEM_ALIGNMENT 4 /*----- Default Value for MEM_SIZE: 1600 ---*/ #d

Hi all,I've been struggling so much to get wake from uart working on this board. It looks like it should be simple, I have this code which I am pretty sure should be everything needed, but it just doesn't wake up when I send data to the serial port.Can anyone see what I might be missing?#include <Arduino.h> #include <stm32u5xx_hal.h> #include <stm32u5xx_ll_usart.h> #include <stm32u5xx_ll_bus.h> #include "CustomPinsHub.h" static constexpr uint32_t LED_PIN = LED1_GRN; uint8_t aRxBuffer[10]; void SystemClock_Config(); // forward HardwareSerial stlinkSerial(rx_pin2debug, tx_pin2debug); void setup() { stlinkSerial.begin(115200); HAL_PWREx_EnableUltraLowPowerMode(); pinMode(LED1_GRN, OUTPUT); digitalWrite(LED1_GRN, LOW); stlinkSerial.println("→ Setup complete. LED is ON."); delay(500); UART_HandleTypeDef *huart = stlinkSerial.getHandle(); UART_WakeUpTypeDef wudata{}; wudata.WakeUpEvent = UART_WAKEUP_ON_READDATA_NONEMPTY; HAL_UARTEx_StopModeWakeUpSour

I'm running into a pixel mismatch issue when trying to capture frames over DCMI from a [B-CAMS_OMV with an OV5640 sensor board attached. I've used CubeMX and the stm32-disco F746 development board to successfully collect RGB565 and JPEG image compression data in various formats and resolutions.Below is my CubeMX generated DCMI configuration:hdcmi.Instance = DCMI;hdcmi.Init.SynchroMode = DCMI_SYNCHRO_HARDWARE;hdcmi.Init.PCKPolarity = DCMI_PCKPOLARITY_RISING;hdcmi.Init.VSPolarity = DCMI_VSPOLARITY_HIGH;hdcmi.Init.HSPolarity = DCMI_HSPOLARITY_HIGH;hdcmi.Init.CaptureRate = DCMI_CR_ALTERNATE_4_FRAME;hdcmi.Init.ExtendedDataMode = DCMI_EXTEND_DATA_8B;hdcmi.Init.JPEGMode = DCMI_JPEG_ENABLE;hdcmi.Init.ByteSelectMode = DCMI_BSM_ALL;hdcmi.Init.ByteSelectStart = DCMI_OEBS_ODD;hdcmi.Init.LineSelectMode = DCMI_LSM_ALL;hdcmi.Init.LineSelectStart = DCMI_OELS_ODD; The OV5640 board is attached to an ST module, and I've written a driver heavily influenced by the [VISION-AI](https://www.st.com/en/emb

Hello,I have 2 STM32 Nucleo F746ZG boards, and I am trying to use one board (MCU 1) to program the second board (MCU 2) through its default bootloader through code. To do so, I used the following command in the MCU2 to start its default bootloader:#define DEFAULT_BOOTLOADER_ADDRESS 0x1FF00000 BOOT_JumpToAddress(DEFAULT_BOOTLOADER_ADDRESS); void BOOT_JumpToAddress(uint32_t address) { printf("Jumping to 0x%08X\r\n", address); // Function pointer to reset handler void (*app_reset_handler)(void) = (void *)(*((volatile uint32_t *)(address + 4U))); // Disable RCC, HAL, reset SYSTICK, and remap vector table offset HAL_RCC_DeInit(); HAL_DeInit(); SysTick->CTRL = 0; SysTick->LOAD = 0; SysTick->VAL = 0; SCB->VTOR = address; uint32_t msp_value = *((volatile uint32_t *)address); __set_MSP(msp_value); // Jump into application app_reset_handler(); } Then, on the programmer, I send the start byte 0x7F. When I receive ACK, I send the bytes for the "Go to applicat

I use the stm32g0b1 microcontroller to USB Host. I use the HAL library from STMicroelectronics. Class for FS IP: Communication Host Class (Virtual Port Com). And it works great with other microcontrollers that use Class for FS IP: Communication Device Class (Virtual Port Com). Both from ST and from other companies. But if I connect a device from FTDI (for example FT230X or FT232) or from WCH (for example CH340/343) to the host, nothing works. Everything freezes on Appli_state == APPLICATION_START.As far as I understand, many people have encountered this, but I have not found any solution to this on the Internet. Is it possible to somehow change the standard library for USB Host from ST so that it would be possible to connect such devices?

Hi everyone, I'm working on a project using an STM32H743 and LwIP (v2.1.2) without an RTOS (NO_SYS=1), and I've been debugging persistent issues related to LwIP's heap allocation and MPU configuration. After days of digging, I’d really appreciate the community's input. What I'm trying to do: I want to place the LwIP heap in RAM_D2 at address 0x30008000, enable MPU regions for protection, and successfully use Ethernet and ping using LwIP. My configuration: .ld file (.lwip_heap section): .lwip_heap (NOLOAD) : { . = ABSOLUTE(0x30008000); KEEP(*(.lwip_heap)) . = ALIGN(4); } >RAM_D2 In mem.c: attribute((section(".lwip_heap"))) attribute((used)) u8_t lwip_heap[MEM_SIZE]; #define LWIP_RAM_HEAP_POINTER ((void*)lwip_heap) In lwipopts.h: #define NO_SYS 1 #define MEM_ALIGNMENT 4 #define MEM_SIZE (64*1024) #define MEM_LIBC_MALLOC 0 #define LWIP_SUPPORT_CUSTOM_PBUF 1 The symptoms: With MPU disabled: I can receive ARP requests and the STM seems to process them correctly by trying to send a b

Hello,I'm using NucleoU575 with CubeMx and I want to make a file system on my SD card.I want to use FreeRtos but there are no Fatfs in CubeMx and the FileX cannot work with FreeRtos (image). Is there anyway i can use Fatfs with STM32U5 ?Thank you. 

Hello,What is the simplest and best way to implement encrypted firmware update via DFU?  I plan on building a custom bootloader but have not found any recent existing projects.  I tried STM32-AES-Bootloader but it is setup for STM32F10 and I am using STM32F373 and am not sure about what memory settings/config I need to go with to make it work.  I need it to work with CubeIDE as well ( STM32 project ) so I've started a new bootloader project to build my own instead of re-using an existing solution. ( unless there is something that will work well with STM32F373 )My uC currently detects an API 'switch to DFU' command, sets a magic value in memory and resets the hardware.  I added reload function on bootup and jump to my app if the magic value is not found.  This all works well but it's not encrypted.  Any advice on how I should proceed?

 Hi ST Community,I'm encountering an issue using the following function in STM32Cube HAL v1.11.3: HAL_UARTEx_ReceiveToIdle_DMA(&CLI_PORT_HANDLER, (uint8_t*)&cliPortRxBuff, sizeof(cliPortRxBuff)); HAL_UART_RegisterRxEventCallback(&CLI_PORT_HANDLER, (pUART_RxEventCallbackTypeDef)CLI_Serial_RxIdle_Complete); In this version, I observed that the callback registration depends on huart->RxState:if (huart->RxState == HAL_UART_STATE_READY) { huart->RxEventCallback = pCallback;} However, RxState is not in the HAL_UART_STATE_READY state at the time of registration, which causes the callback not to be assigned—leading to broken UART behavior.In contrast, previous versions (e.g., v1.11.0) checked gState, which allowed this registration to work as expected.Questions:Why was RxState chosen for the condition in v1.11.3 instead of gState?What is the recommended workaround or best practice to ensure the callback can be registered successfully in this new version?Appreciat

hi all,i am developing a project using stm32u585 microcontroller which can connect to the external devices using ethernet and USB protocols.i need to put the controller in sleep or any low power mode when ever a sleep command is reached through the USB communication and its need to be wake up when any command through the USB. i am new to the controller sleep part .is it possible to implement this if so can anyone please give some reference regarding the same.and am using azure RTOS environment for the development(threadx,netx,usbx).the same needs to implement on ethernet side as well since i am using an external chip for the ethernet and its using and external interrupt for transmitting and receiving data i can use that in case of ethernet.   but in case of USB i didn't got any reference to work with any low power mode of the controller. (need to use the commands send through USB for put into sleep as well as wakeup from sleep).any reference regarding it will be a great help.

Hi everyone,I'm working on an STM32f103 project using Keil MDK (uVision) and could use some advice and practical insights from those who've handled intensive flash write requirements before.My use case:I need to reliably store and retrieve a single `double` value (8 bytes) in the STM32's internal flash memory. The challenge is that I have to support at least 3 million write cycles to this value over the product's lifetime—well above the typical endurance of a single flash page (which is around 10,000 cycles per page on my device).Constraints:- No external memory: The hardware is fixed; I have to use internal flash only.- Keil MDK: Development is in Keil uVision- Memory available: I can dedicate about 30 of the 128 internal flash pages for this purpose, which should provide enough headroom for wear leveling.Requirements:- Core functions: - Write a double value to NV memory with wear leveling.- Read the last stored value at startup and on demand.- Robust wear leveling: The solution

Hi All,Dears.I am studying how to make http requests with Nucleo-F429ZI. I have already had success with the web server example (HTTP Server), but now I need to make requests on another server, where a number of endpoints will be available. The difficulty I am having is that all the examples I found use the GET method, and I need to make some requests with the POST method. Is this possible?Could you recommend some reading material with examples?

Hello, I am trying to use one MCU to program another MCU, both of which are STM32 F746ZG boards.Let the MCU that is sending the commands be MCU 1, and the MCU in the bootloader mode be MCU2.I use the following command in the MCU2 to start its default bootloader:BOOT_JumpToAddress(DEFAULT_BOOTLOADER_ADDRESS); void BOOT_JumpToAddress(uint32_t address) { printf("Jumping to 0x%08X\r\n", address); // Function pointer to reset handler void (*app_reset_handler)(void) = (void *)(*((volatile uint32_t *)(address + 4U))); // Disable RCC, HAL, reset SYSTICK, and remap vector table offset HAL_RCC_DeInit(); HAL_DeInit(); SysTick->CTRL = 0; SysTick->LOAD = 0; SysTick->VAL = 0; SCB->VTOR = address; uint32_t msp_value = *((volatile uint32_t *)address); __set_MSP(msp_value); // Jump into application app_reset_handler(); }Then, on MCU1, I have coded the following functions so that I can send certain commands by typing them into my serial emulator PuTTY:printf("cmd: "); w

Hello Community!I have an issue with reading / writing the RTC in an H723 MCU.The issue is:I can set the Clock to a date, but when I read out the RTC, then the year is 10 years in the future.e.g. I set the time to now (2025 / 06 / 22 19:mm:ss) and I read out the RTC after that, i get the corret day of month, month, hour, minute and second but the yearis 2035 (or better: 35 instead of 25, because the year in the Date Typedef is an u8 integer). This is my code:  RTC_DateTypeDef d; RTC_TimeTypeDef t; d.Year = (uint8_t)(hDateTime->dt.year - 2000); d.Month = hDateTime->dt.month; d.Date = hDateTime->dt.day; t.Hours = hDateTime->tm.hour; t.Minutes = hDateTime->tm.min; t.Seconds = hDateTime->tm.sec; if(hDateTime->tm.dst) { t.DayLightSaving = RTC_DAYLIGHTSAVING_ADD1H; } else { t.DayLightSaving = RTC_DAYLIGHTSAVING_NONE; } uint8_t retval = 0; if(HAL_OK != (HAL_RTC_SetTime(&hrtc, &t, RTC_FORMAT_BIN))) retval |= 2; if(HAL_OK != (HAL_RTC_SetDate(

I have an existing project on an STM32F746g_disco board. The project uses lvgl under zephyr rtos. When I build and flash the zephyr/subsys/fs/fs_sample for this board, The terminal does read the sd card and return a listing of the root contents.I tried to apply the devicetree overlay, kconfig, and code to my lvgl based project, but it now shows an error of the mount point is unknown.I did more digging and with the help of claude came up with these changes. Error: 1. At one point I could get it to compile but the error reported was that the mount point didn't exist. 2. With this code I have a " undefined reference to `__device_dts_ord_208'" error, which seems to be associated wih the ".rodata.sdmmc_config_" file. Questions: Is this the correct approach to adding an sdcard to an lvgl project in zephyr? 

Hi allI'm struggling for a while getting a µSD Card to run via SDMMC on FileX. I'm using a Nucleo U575 Board with an external SDMMC/SDIO-breakout board. I tried to follow the "Fx_uSD_File_Edit" example for the U575I-EV board.Long story short, I set up a FileX application thread on ThreadX and I'm trying to just open the media.In main.c there's the automatically generated MX_SDMMC1_SD_Init() initializing the the SDMMC1 interface just after GPIOs and ICACHE were initialized. In main.c everything runs through without any error.However, when entering the FileX application, the very first function getting called is MX_SDMMC1_SD_Init() again - as I configured FileX to initialize the SD IP (just as seen in the Fx_uSD_File_Edit-example). This time it ends in a HardFault in the Init. The one thing that I really don't understand is that it happens just on the call of  sdmmc_clk = HAL_RCCEx_GetPeriphCLKFreq(RCC_PERIPHCLK_SDMMC);in stm32u5xx_hal_sd.cI enabled a breakpoint on the very first li

I am working on the communication between ADS199FE-PDK and the STM32F407-DISCO board. I created SPI code using the HAL library. MOSI line seems to be working, but MISO line returns 0xFF all the time. I cannot even read the registers. I am sharing my created code below. Also, I am sharing the logic analyser result of the SPI line. Thanks for your help./* 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 */

Hello. I'm using a custom board with STM32F105RBT6. I used the MX_USB_HOST_Init() funtion to configure the host usb in mode usb_otg_fs. The problem is that some USB keys don't work (the USBH_Process() function can't go further the HOST_ENUMERATION state).Checking all the value returned by the involved functions I see this:USBH_HandleEnum() returns USBH_BUSY (in the ENUM_IDLE state);USBH_Get_DevDesc() returns USBH_BUSY;USBH_GetDescriptor() returns USBH_BUSY;USBH_CtlReq(phost, buff, length) returns USBH_BUSY;Inside the USBH_CtlReq() function, after the CMD_SEND, the functions goes to the CMD_WAIT state and the USBH_HandleControl() function returns USBH_BUSY.The USBH_HandleControl() is in the state CTRL_SETUP_WAIT, where the USBH_LL_GetURBState() function returns sometimes USBH_URB_IDLE or USBH_URB_NOTREADY or USBH_URB_ERROR.What could be the reason?

I am working on a project using the STM32F207ZG (NUCLEO-F207ZG) microcontroller with FreeRTOS, LwIP (Ethernet), and wolfSSL to communicate securely with cloud servers over HTTPS. I am able to successfully perform a TLS handshake and communicate with an AWS server by loading the Amazon Root CA 1 certificate—everything works as expected in this case. However, when I attempt to connect to a Firebase server using the corresponding root certificate, the TLS handshake fails with error code -188, which corresponds to ASN_NO_SIGNER_E. I verified that the Firebase root certificate is valid by testing it with the wolfSSL example code on a PC, where it worked correctly, indicating the certificate itself is not the issue. I also encountered the same -188 error when trying to connect to an Azure server, again using the appropriate root certificate. This suggests the problem is specific to the STM32 + wolfSSL embedded environment. Since AWS, Firebase, and Azure all use similar TLS configurations and

Hi,I have created an lwIP + FreeRTOS application using CubeIDE for my Nucleo 439 Board. The problem here is that the the init sequence generated by CubeIDE LWIP/App/lwip.c functionMX_LWIP_Init()it calls the following function without checking for the actual status of PHY (even when it is possible)/* We must always bring the network interface up connection or not... */ netif_set_up(&gnetif);So, even if I don't plug in my LAN cable to the RJ45 of Nucleo board, my network is marked as "UP", while actually its is "DOWN"I don't understand the need for this. I have seen the the EthLink thread is already testing the status of the actual phy and calling the  same function for us. So what is the need to call it in init sequence?Ethernet Link State (Physical Ethernet Cable connection)This thread manages the Link state of netif. The thread's task function is defined in the file LWIP/Target/ethernetif.cIt runs in an infinite loop. With 100ms delay between loops.In each iteratio

Hi Sir,       This is shiva chary ,am trying to implement Ethernet without LwIP,so when am configuring the ethernet MAC it is not resetting and am getting timeout error. can u please provide the solution for the respective errorThank youregards,shiva chary 

As I tried to find CAN drivers for " STM32L4R9I-EVAL" but I didn't find any, And I tried configuring CAN example of Stm32L476G-Eval board but it is not working.Anyone who worked on STM32L4R9I-EVAL board please Guide me in this