STM32 MCUs Embedded software

I just had a quick question to clarify my understanding of how byte allocation works for thread stacks in the ThreadX RTOS. I've seen the official examples use a byte pool and then allocate bytes from that pool before creating a new thread. However, in other places I've seen something as follows where the bytes are allocated statically:   /* Private variables ---------------------------------------------------------*/ uint8_t thread_stack[TX_THREAD_STACK_SIZE]; TX_THREAD thread; /* Private function prototypes -----------------------------------------------*/ VOID thread_entry(ULONG thread_input); /** * @brief Application ThreadX Initialization. * memory_ptr: memory pointer * @retval int */ UINT App_ThreadX_Init(VOID *memory_ptr) { UINT ret = TX_SUCCESS; TX_BYTE_POOL *byte_pool = (TX_BYTE_POOL*)memory_ptr; (void)byte_pool; tx_thread_create(&thread, "thread", thread_entry, 0, thread_stack, TX_THREAD_STACK_SIZE, 15, 15, TX_NO_TIME_SLICE, TX_AUTO_START); return ret

Hi,   I have been working with a STM32U575 MCU and something strange has happened that I spent a lot of time trying to find the root cause for it and I am not able to understand what is wrong. I work with I2C slave interrupts and have FreeRTOS running. I realized FreeRTOS gets stuck in checking priorities when a FromISR function is called from the I2C handler. Long story short, checking all the configs many times, I checked what are the priority of the IRQs?     HAL_NVIC_SetPriority(I2C1_EV_IRQn, NVIC_IRQ_PRIOR_I2C_SLAVE_EV, NVIC_IRQ_SUB_PRIOR_I2C_SLAVE_EV); HAL_NVIC_SetPriority(I2C1_ER_IRQn, NVIC_IRQ_PRIOR_I2C_SLAVE_ER, NVIC_IRQ_SUB_PRIOR_I2C_SLAVE_ER); HAL_NVIC_EnableIRQ(I2C1_EV_IRQn); HAL_NVIC_EnableIRQ(I2C1_ER_IRQn); PRINT("I2C1_EV raw priority: %lu\n", NVIC_GetPriority(I2C1_EV_IRQn)); PRINT("I2C1_ER raw priority: %lu\n", NVIC_GetPriority(I2C1_ER_IRQn)); PRINT("__NVIC_PRIO_BITS = %d\n", __NVIC_PRIO_BITS); PRINT("configPRIO_BITS = %d", configPRIO_BITS);   having

Hi, I'm running a (custom) board that makes use of an STM32H723VET and a LAN8742. A project is set up in CubeMX that makes use of lwIP together with this LAN-chip (there is an issue in CubeMX which deselects the LAN8742 on loading the CubeMX file, but this is something I have already catched). lwIP is configured to make use of a static IP. Now when I run my code in CubeIDE, I can see the interface is set up properly and it detects a 100 MBit duplex connection. Unfortunately that's all what works. In call of netif_set_link_up(), an ARP-request is tried to be transmitted. Some layers deeper, within the HAL-functions, this ARP-request can not be sent. Function HAL_ETH_Transmit() ends up in an timeout while waiting for these ARP-data being transmitted. That lets me assume, something wents wrong with the hardware initialisation. However, functions HAL_ETH_Init() and LAN8742_Init() go through without any error and function LAN8742_GetLinkState() returns a proper link state&nbs

Hello,  I am starting a timer interrupt to send data over can data at 50 ms below is the configuration for the same and callback function when pulse is complete volatile uint8_t send_ch0_flag = 0; volatile uint8_t send_chx_flag = 0; volatile uint8_t send_relay_flag = 0; void MX_TIM2_Init(void) { TIM_ClockConfigTypeDef sClockSourceConfig = {0}; TIM_MasterConfigTypeDef sMasterConfig = {0}; htim2.Instance = TIM2; htim2.Init.Prescaler = 3999; // 80 MHz / (3999+1) = 20 kHz htim2.Init.CounterMode = TIM_COUNTERMODE_UP; htim2.Init.Period = 999; // (999+1) / 20kHz = 0.05 s = 50 ms htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1; htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE; __HAL_RCC_TIM2_CLK_ENABLE(); if (HAL_TIM_Base_Init(&htim2) != HAL_OK) { Error_Handler(); } sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL; if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK) { Error_Handler(); } sMa

I'm trying to go about creating a USB Audio interface on a NUCLEO-H7S3L8, receiving USB audio and forwarding it to the SAI, in order to send to an external DAC.Among other tests, I went back to checking when the functions in usbd_audio_if.c get called, to set up transfers of the packets received.And while in a previous version of the same project, on audio playback on the host, AUDIO_AudioCmd_HS() was called, allowing me to continue handling data accordingly, after a Cube MX update (6.14->6.15) and some changes on DMA (to get circular -> non-circular) and SAI (Output Drive enabled) settings, it no longer gets called on playback (a breakpoint within it never gets reached).Following the IRQ handler function for USB on either playback or idle, it only ends up within the code block for handling an incomplete "ISO OUT Interrupt", reaching the "__HAL_PCD_CLEAR_FLAG(hpcd, USB_OTG_GINTSTS_PXFR_INCOMPISOOUT)" macro.Since the changes I've made ever since it was functional seem mostly

Hello everyone, I need to install the firmware support package for STM32H7 series offline. On the website (STM32CubeH7 | Product - STMicroelectronics), I found both the "STM32Cube MCU Package for STM32H7 series" and the "Patch for STM32CubeH7". What is the difference between them ?

Hi, I'm facing issues while trying to interface a 32GB SD card with the STM32H753ZIT6 development board using SDMMC1 and FatFS. Below are the key problems observed:SD Initialization Fails:HAL_SD_Init() consistently returns HAL_ERROR (Status: 1).Card Not Ready:The card state remains 0, indicating that it is not ready or not properly initialized.Incorrect Card Capacity Reported:Despite using a 32GB SD card, the detected capacity is only about 1.8GB (1806848 KB).This suggests the card isn't being properly initialized or detected, and capacity detection is failing. Looking for help identifying the root cause—whether it's clock config, pin setup, timing issues, or something else.I have attached the code and output file.Pin connection between SD card to STM32:-------------------------------------------------------------DAT0    ->   PC8DAT1    ->   PC9DAT2    ->   PC10DAT2    ->   PC11CLK  &n

I'm developing a project using an STM32 Nucleo board. At the core of this project is a UART-based communication protocol running in interrupt (IT) mode — not polling or DMA. This protocol is responsible for controlling multiple subsystems such as a relay module and a fan speed controller.However, most of these subsystem modules were previously written in polling mode.My question is:Can I integrate these polling-based modules into my current UART IT-mode communication system without causing issues? Or should I consider converting them to interrupt or DMA mode to prevent CPU blocking or communication delays?Additionally:What should I watch out for to ensure the CPU doesn't get blocked and UART interrupts don't get delayed in this mixed-mode setup?Extra context:There are 20 NTC temperature sensors in the system, and temperature from all of them is read once every second using ADC. The highest temperature value is selected and stored in a variable. Based on this value, the fan speed is adj

Hello Everybody, I use STM32CubeIDE1.15.0 Build: 20695_20240315_1429 and a custom board with a STM32303RE inside.I use the IOC interface to set the virtual port com. Everything work fine, just a detail: when i connect, then disconnect and reconnect the USB port, the port com number on Windows change, It increase (search the next available number)! The VID and PID are always the same, so I focus on the serial number, and i found that (code generate by STM32CubeIde): usbd_desc.c: 3 undefined local variables, which are used to generate the serial number. Each time I connect the USB cable, the values change=>so the serial number change. Is it normal? Is it a (strange) way to generate a randomize serial number?Just a bug?  (VCP number seems better with this fix: ;))   BR,Guillaume Le Gal  

Hi, we are currently using different types of the STM32H743 and I want to verify the package to make sure the software is running on the expected device. For this I am using LL_GetPackageType() and check the returned value against one of the LL_UTILS_PACKAGETYPE defines in stm32h7xx_ll_utils.h (line 202 and following). The UFBGA169 package is not listed here.  What is the correct value for it? The H743AII6 on my board reports 8. Please add this package in a next HAL release for H7 series.   Kinds regards, Martin

Bonjour à tous, cela fait une semaine que je dois développer une API pour la mémoire sécurisée at88sc12816c De chez Atmel mais trés malheuresement j’arrive paz à établir la communication entre ma carte maitre qui est un stm32f412zgt6 et la mémoire eeprom.De mon côté, j’ai bien compris le fonctionnement de la mémoire mais sauf que dans ce dernier les adresses sont diverses, j’explique par exemple pour faire une écrituredans une UserZone c’est B0 et cet octet ce termine par 0 ce qui est correctement compris par la HAL pour faire de l’écriture en i2cmais dans le cas d’une lecture aussi par exemple on l’adresse qui se termine encore 0, alros que dans un protocole i2c standard pour lire le dernier bit de l’octet d’adresse doit être à 1. Et je pense que c’est exactement ce que la HAL ne comprend pas à son niveau. J’ai vraiment besoin d’aide pour avancer  

Hello,i have configured timer1 to trigger via CC1  an  adc + dma.For the DMA i have  placed the TC irq routine and placed a gpio toggle to follow with a logic analyzer like shown below void DMA2_Stream0_IRQHandler(void){ if (DMA_GetITStatus(DMA2_Stream0, DMA_IT_TCIF0) != RESET) { GPIO_ResetBits(gpio_led_port,gpio_led2); GPIO_SetBits(gpio_led_port,gpio_led2); GPIO_ResetBits(gpio_led_port,gpio_led2); DMA_ClearITPendingBit(DMA2_Stream0, DMA_IT_TCIF0); } }And this is my nvic setup  SysTick_Config(SystemCoreClock / 1000); NVIC_InitTypeDef NVIC_InitStructure; NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0); NVIC_InitStructure.NVIC_IRQChannel = SysTick_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream0_IRQn; NVIC_InitStructure.NVIC_IRQChan

Hi All,I'm struggling to get LPTIM1 to wake from STOP mode on the STM32U5 series parts. I have a STM32U575ZI Nucleo board. When I use SLEEP mode, the LPTIM1_IRQHandler in stem32u5xx_it.c is hit. When I use STOP mode, it is not. I made an example with CubeMx to make it as simple as possible. I'll attach the CubeMx ioc and main.c, but see below for the snippit with all the CubeMx comments removed. Presumably its not an issue with the LPBAM, as if I set the RCC->SRDAMR to all ones, it still fails.Any ideas?ThanksJeff int main(void){HAL_Init();SystemClock_Config();MX_LPTIM1_Init();__HAL_RCC_LPTIM1_CLKAM_ENABLE();HAL_LPTIM_Counter_Start_IT(&hlptim1);while (1){HAL_SuspendTick();HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI); // Doesn't work//???HAL_PWR_EnterSLEEPMode(PWR_LOWPOWERREGULATOR_ON, PWR_SLEEPENTRY_WFI); // WorksHAL_ResumeTick();}}

Hallo,does exist, in FileX, a function that returns the free available space not yet utilized?Thank you.

Specifically the SNB (SSN1 & SSN2 in the data sheet) bits are defined erroneously as being 3 bits wide at position 6, whereas it should be 7 bits wide, allowing all 128 sectors in each bank to be erased.#define FLASH_CR_SNB_Pos (6U) #define FLASH_CR_SNB_Msk (0x7FUL << FLASH_CR_SNB_Pos) /*!< 0x00001FC0 */ #define FLASH_CR_SNB FLASH_CR_SNB_Msk /*!< Sector erase selection number */ #define FLASH_CR_SNB_0 (0x01UL << FLASH_CR_SNB_Pos) /*!< 0x00000040 */ #define FLASH_CR_SNB_1 (0x02UL << FLASH_CR_SNB_Pos) /*!< 0x00000080 */ #define FLASH_CR_SNB_2 (0x04UL << FLASH_CR_SNB_Pos) /*!< 0x00000100 */ #define FLASH_CR_SNB_3 (0x08UL << FLASH_CR_SNB_Pos) /*!< 0x00000200 */ #define FLASH_CR_SNB_4 (0x10UL << FLASH_CR_SNB_Pos) /*!< 0x00000400 */ #define FLASH_CR_SNB_5 (0x20UL << FLASH_CR_SNB_Pos) /*!< 0x00000800 */ #define FLASH_CR_SNB_6 (0x40UL << FLASH_CR_SNB_Pos) /*!< 0x00001000 */This causes the HAL_FLASHEx_Erase to behave

Hello everyone!I have just noticed that The OPAMP_CSR_OPARANGE bit in NUCLEO-U575ZI-Q is not shown during debug mode. Some bug perhaps?..

I have a project working on the NUCLEO-N657X0-Q with FSBL and an application. In total I am using under 1MB of the 64MB flash this board has. I was wondering if it was possible to segment off the rest of the flash to be used as a mass storage device over USBX with FileX. I am using the load and run config instead of XIP. The current flash usage is as follows: 0x70000000 - FSBL (66KB) 0x70100000 - Application (100KB) 0x71000000 - Weights and activations (400KB) I know I can use cube programmer to write external data directly to the memory mapped flash drive but I would prefer to use standard file access tools. I have successfully implemented mass storage on a STM32H5 but that MCU didn't need to also load firmware so FileX could manage the whole drive as if it was empty.  Alternatively would it be possible to instead use FileX to load the FSBL/Application parts instead of the external memory manager?

I'm working on entering and exiting low power run mode at runtime on Zephyr rtos. I can't find a way to change clock frequency to 2MHz (required by LPR) and back to 80MHz using zephyr  features at runtime. Is there any api to achieve this, or some similar example? I'm working on STM32L4S5 series.

Hi Team, I made a custom board using STM32F769BIT microcontroller using with the DP83867 PHY in MII mode, but I am not able to ping it. What could be the possible reasons?  I did Memory configurations for TxDecrip, RxDecrip, LwipHeap like this. .lwip_sec (NOLOAD) : . = ABSOLUTE(0x2007C000); *(.RxDecripSection) . = ABSOLUTE(0x2007C0A0); *(.TxDecripSection) . = ABSOLUTE(0x2007C140); *(.LwIPHeap) also my SRAM configuration is like this_ MEMORY RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 496K SRAM2 (xrw) : ORIGIN = 0x2007C000, LENGTH = 16K FLASH (rx) : ORIGIN = 0x8000000, LENGTH = 2048K I am using the 10pin STM32 debugger, but I am not able to see the stack usage there, when I press the debug button. Is it due to code or due to the debugger? For this should I need the 20pin debugger?   Thanks, Sayan Das  

Interrupts not in proper peripherals:- WWDG is placed in I2C2,- TIM8_CC is in peripheral TIM1,- LPTIM1 is in LPUART1,- USB_HP,  USB_HPLP  & USBWakeUP are in EXTI,- CRS is in the EXTI as well. 

In stm32u5xx_hal_flash_ex.c, version 1.6.2, FLASH_OB_GetUser() is defined as:/** * @brief Return the FLASH User Option Byte value. * @retval The FLASH User Option Bytes values. * The return value can be a combination of @ref FLASH_OB_USER_BOR_LEVEL, * @ref FLASH_OB_USER_nRST_STOP, @ref FLASH_OB_USER_nRST_STANDBY, * @ref FLASH_OB_USER_nRST_SHUTDOWN, @ref FLASH_OB_USER_SRAM_RST, * @ref FLASH_OB_USER_IWDG_SW, @ref FLASH_OB_USER_IWDG_STOP, * @ref FLASH_OB_USER_IWDG_STANDBY, @ref FLASH_OB_USER_WWDG_SW, * @ref OB_USER_SWAP_BANK, @ref FLASH_OB_USER_DUALBANK, * @ref FLASH_OB_USER_BKPRAM_RST, @ref FLASH_OB_USER_SRAM3_ECC, * @ref FLASH_OB_USER_SRAM2_ECC, @ref FLASH_OB_USER_SRAM2_RST, * @ref FLASH_OB_USER_nSWBOOT0, @ref FLASH_OB_USER_nBOOT0, * @ref FLASH_OB_USER_PA15_PUPEN, @ref FLASH_OB_USER_IO_VDD_HSLV, * @ref FLASH_OB_USER_IO_VDDIO2_HSLV and @ref OB_USER_TZEN */ static uint32_t FLASH_OB_GetUser(void) { uint32_t user_config = READ_REG(FLASH->OPTR); CLEAR_BIT(user_config, FLASH_OPTR_RDP); re

Hi ST community,I am using the B-L4S5I-IOT01A board to record 3 sec of 16 kHz audio using DFSDM + DMA, and then transmit it offline via UART (after recording is complete). Since two MP34DT01-M microphones are connected to DFSDM Channel 2, I configured Filter 0 to use only one microphone. I am using a Python script to receive the DFSDM data and save it in .WAV format. I am able to record 3 sec of audio; however, when I play the audio on my laptop, it seems to play at 10× speed.Here is my code :  #define SAMPLE_RATE 16000 #define RECORD_SECONDS 3 #define TOTAL_SAMPLES (SAMPLE_RATE * RECORD_SECONDS) #define DFSDM_BUFFER_SIZE TOTAL_SAMPLES #define UART_TX_TIMEOUT 1000 static int32_t dfsdm_rec_buf[DFSDM_BUFFER_SIZE]; // Raw 32-bit DFSDM samples static int16_t audio_output[DFSDM_BUFFER_SIZE]; // 16-bit PCM samples static volatile bool record_done = false; extern DFSDM_Filter_HandleTypeDef hdfsdm1_filter0; extern UART_HandleTypeDef huart1; int16_t clamp(int32_t val, int32_t min,

Hi, I am having issues with threadX tx_byte_allocate throwing a hard fault exception.  This only happens after some time of byte allocate and release. There are still plenty of available bytes according to the pool. But somehow in _tx_byte_pool_search it encounters some problem.  I am not posting the entire source code here as that will be huge. Anyway, I am using STM32H753. I created a byte pool using DTCRAM (128K). Linker snippet: RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 128K .ram_dtcmram : { *(.ram_dtcmram) } >RAM       Code Snippet #define RAM_DTCMRAM \ __attribute__((section(".ram_dtcmram"))) #define GENERIC_MEM_ALLOCATION (0x20000-0x1000)   static u8 m_genericMemBytePoolBuffer[GENERIC_MEM_ALLOCATION] RAM_DTCMRAM; static TX_BYTE_POOL m_genericMemBytePool RAM_D3;   bool Hal_MemPool_Init(void) { if (tx_byte_pool_create(&m_genericMemBytePool, "Generic memory pool", m_genericMemBytePoolBuffer , GENERIC_MEM_ALLOCATION) !=

 I'm trying to implement a USB touchscreen on a NUCLEO F446ZE. I'm making a full-speed device using ST's USB library (Custom HID class) and I'm testing it with on a Windows 10 host. The first contact registers, but when I try to press another, it doesn't. This happens even when the contacts are being pressed independently.I'm using the sample report descriptors provided in the Windows Hardware Developer docs, modified such that the X and Y usages only report intended touches. I've also excluded the Device Certification Status Feature Report for simplicity. My report descriptor is as follows: /* USER CODE BEGIN 0 */ 0x05, 0x0d, // USAGE_PAGE (Digitizers) 0x09, 0x04, // USAGE (Touch Screen) 0xa1, 0x01, // COLLECTION (Application) 0x85, 0x01, // REPORT_ID (Touch) 0x09, 0x22, // USAGE (Finger) 0xa1, 0x02, // COLLECTION (Logical) 0x09, 0x42, // USAGE (Tip Switch) 0x15, 0x00, // LOGICAL_MINIMUM (0) 0x25, 0x01, // LOGICAL_MAXIMUM (1) 0x75, 0x01, // REPORT_SIZE (1) 0x95, 0x01,

I am currently experimenting with STM32F030RCTX and STM32F030CCTX devices.My goal is to use RS485 with auto-baudrate detection, since I have modules that operate either at 115200 baud or 500k baud.On STM32F030RCTX, I use USART1.On STM32F030CCTX, I use USART3.The UART init functions are identical, except for the instance selection.Example init function:void mcu_UART3_Init(void) { huart3.Instance = USART3; huart3.Init.BaudRate = 115200; huart3.Init.WordLength = UART_WORDLENGTH_8B; huart3.Init.StopBits = UART_STOPBITS_1; huart3.Init.Parity = UART_PARITY_NONE; huart3.Init.Mode = UART_MODE_TX_RX; huart3.Init.HwFlowCtl = UART_HWCONTROL_NONE; huart3.Init.OverSampling = UART_OVERSAMPLING_16; huart3.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE; huart3.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_AUTOBAUDRATE_INIT; huart3.AdvancedInit.AutoBaudRateEnable = UART_ADVFEATURE_AUTOBAUDRATE_ENABLE; huart3.AdvancedInit.AutoBaudRateMode = UART_ADVFEATURE_AUTOBAUDRATE_ON0X55FRAME; if (