Others: STM32 MCUs related

Hello, I am having an SPI communication issue between an STM32H743BIT (SPI master) and a TI ADS7066IRTER ADC using SPI Mode 0 (CPOL=0, CPHA=0). I write a configuration register and immediately read it back, but the read value does not match what was written. The logic analyzer shows correct MOSI data, but MISO often returns 0xFF or 0x80, and the SPI decoder reports “Settings mismatch”. The write/read sequence is: SPI_ADS7066_writeSingleRegister(hADS7066, GENERAL_CFG_ADDRESS, OPMODE_CFG_CLK_DIV_6); if (SPI_ADS7066_readSingleRegister(hADS7066, GENERAL_CFG_ADDRESS) != OPMODE_CFG_CLK_DIV_6){Throw(EMBL_ERROR);} Write and read functions used: void SPI_ADS7066_writeSingleRegister(HANDLER hADS7066, uint8_t address, uint8_t data){PSPI_ADS7066DESC pADS7066Desc = (PSPI_ADS7066DESC)hADS7066;uint8_t dataTx[4] = {0};uint8_t numberOfBytes = SPI_CRC_ENABLED(pADS7066Desc) ? 4 : 3;EMBL_RETCODES ret; dataTx[0] = OPCODE_WREG;dataTx[1] = address;dataTx[2] = data;if (SPI_CRC_ENABLED(pADS7066Desc))dataTx[3]

i am using nucleo-h753zi and i need to integrate external flash via spi, MX25L6433F this is my flash ic. i was struggling to integrate this flash so please guide me to achieve it also if possible please give any example code for this project

Hello!I'm working on a project to use some bar-displays 284x76 pixels using ST7789 driver and I'm struggling for about 2 weeks to solve this issue. Everything is perfect using SPI DMA HAL_SPI_Transmit_DMA() if the buffer is in RAM.But if I define a struct like this in file image.h:typedef const struct { const uint32_t width; const uint32_t height; const uint32_t bytes_per_pixel; const uint16_t pixel_data[]; // Array flexibil (C99) } ImageRGB565_16bit; Then in FCU.h I have:#include "images.h" extern ImageRGB565_16bit FCU01; extern ImageRGB565_16bit FCU02; extern ImageRGB565_16bit FCU03; extern ImageRGB565_16bit FCU04; extern ImageRGB565_16bit FCU05; And loading images like this FCU.c:ImageRGB565_16bit FCU01 = { 284, 76, 2, { 0x0000, 0x0000, 0x0000, .. } };When I run the code I'm getting this result on Serial port:FCU Background with alpha 0.2 FCU = 0x80313a4 FCU.pixel_data = 0x80313b0Which looks like the struct resides in FLASH memory.But the HAL_SPI_

I am using an STM32L433 with a W25Q128JVSIQ flash.I can read and write data but the W25Q does not seem to respond to the power down command.When I send the power down command 0xB9, reading data from the W25Q should not be possible until the release command 0xAB is sent.  However, I am not sending this release command but can read data from the W25Q, which indicates it did not enter power down.  Below is a scope capture of the power down command and it looks correct...I am using the following driver for the W25Q...https://github.com/mengguang/w25qxxBelow is the function I wrote to power down the W25Q... #define W25QXX_POWERDOWN 0xB9 void w25qxx_powerDown(W25QXX_HandleTypeDef *w25qxx) { uint8_t tx[1] = {W25QXX_POWERDOWN}; cs_on(w25qxx); w25qxx_transmit(w25qxx, tx, 1); cs_off(w25qxx); }I even tried adding a delay (1ms) before the CS pin is raised high after the 0xB9 command has been sent, but it still did not enter power down.With a previous setup I had many

Hello ST Community,@pavel_A@erwan_CI am working on a project using STM32 NUCLEO-F446RE and the SmartElex Power Meter (ACS37800) for voltage, current, and power measurement over I²C.https://robu.in/product/1-month-warranty-1276/?gad_source=1&gad_campaignid=18585959909&gbraid=0AAAAADvLFWd-Gp59GIu3AsyVYZj3ppOY9&gclid=Cj0KCQiA7fbLBhDJARIsAOAqhsePuiSx2qOJKlmgFcZN2-_7bfwkDHpCOUyG6G9Q4REJXpOXr7KYUEIaAq3dEALw_wcBHardware details:MCU: STM32F446RE (NUCLEO-F446RE)Sensor: SmartElex ACS37800 (Allegro ACS37800 IC)Interface: I²C1SCL: PB6SDA: PB7VCC: 3.3 VExternal pull-ups: 4.7 kΩ on SDA/SCLI²C speed: 100 kHzSoftware details:STM32CubeIDE v1.19.0The sensor works correctly with ESP32 using the SparkFun Arduino library, but I am looking for a proper STM32 HAL-based reference or sample code specifically for:Correct I²C initialization and addressing16-bit register access required by ACS37800Reading instantaneous voltage, current, and powerRecommended power-up timing and initialization sequenceI

I work on an STM32F407G-DISC1 pedometer project, in which the program is supposed to use built-in lis3dsh accelerometer via SPI to detect and count steps and display the number of steps on the screen (ILI9341 SPI).I have tested my screen code, and it works properly, so problem lies in how I use accelerometer or detect steps.To detect steps, I read lis3dsh registers with 100HZ frequency by making a call to SPI from a 100HZ timer interrupt. These snippets are interrupt and timer configuration respectively.void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef* htim) { if (htim->Instance == TIM2) { if ((draw_ready == 1) && (accelerometer_ready == 1)) { accelerometer_read_all_axes_dma(xyz_data, &hspi1); } } //else if (htim->Instance == TIM3) { // if (draw_ready == 1) { //steps_count += 1; //update_lcd_flag = 1; // } //} }static void MX_TIM2_Init(void) { /* USER CODE BEGIN TIM2_Init 0 */ /* USER CODE END TIM2_Init 0 */ TIM_ClockConfigTyp

Would writing to the crossbar registers (SETx1R, RSTx1R, SETx2R, RSTx2R of all 6 timers) on every PWM cycle (max 200kHz) affect long term reliability? I'm running this in an interrupt routine for a power converter and I'm wondering if doing this would make sense to have a more consistent processor delay. Preload is enabled on all 6 timers and master timer. Register updates on timers 1-6 occur on master timer register update.

 My ST32N6 Discovery apparently works very well, however, when I enter the AI ​​demo, the camera screen goes black, and two red LEDs light up on the RGB LEDs next to the connector.If I remove the camera, the DEMO alerts that there is no camera.There is no LED on the camera module to indicate its status.Are there any tests I can do to check if the camera is damaged?Unfortunately, I can no longer return it, as it has been more than 60 days since I received it and only today was I able to take the time to do a more in-depth study of the camera.

I work on a pedometer project, which uses built-in accelerometer and an LCD screen (ILI9341). The screen code works fine, but I struggle to get the pedometer part to work. I suspect there might something wrong with how I initialized the accelerometer, since it outputs weird values.I use an stm32f407g-disc1 board with built-in accelerometer, which I communicate with via SPI. I find the values it returns very weird, since I don't move the device at the moment. Shouldn't they be close to zero since there is no acceleration? Moreover, they don't change when I shake the device slightly, although it may be because the acceleration is not big enough to be detected. Another problem is that mag value changes all the time, although x,y,z don't change.Valuesmain functionint main(void) { /* USER CODE BEGIN 1 */ /* USER CODE END 1 */ /* MCU Configuration--------------------------------------------------------*/ /* Reset of all peripherals, Initializes the Flash interface and the Systick. *

Split from this thread as the questions become more generic on embedded systems not related to the STM32. Hello Team, We are currently evaluating STM32H563ZI for a production system and would like your guidance on recommended CPU and RAM margin before moving to large-scale deployment. Based on our current firmware build analysis (STM32CubeIDE Build Analyzer): RAM: Total: 640 KB Used: ~182 KB (≈28.5%) Free: ~458 KB Flash: Total: 1 MB Used: ~282 KB (≈27.6%) Free: ~742 KB From a static memory usage perspective, sufficient margin is available. However, our application is load-dependent, and real CPU utilization varies based on field conditions and communication traffic. We would like clarification and guidance on the following points: What CPU utilization margin (%) is recommended for STM32H5 series devices in production systems (for example, acceptable average and peak CPU load)? What RAM headroom (free heap and stack margin) is considered safe for long-term and

Hi all, our product, used in industrial traction, uses an STM32F407 MCU. In certain conditions, very hard to replicate, the MCU stucks and the watchdog does not reset the MCU. It seems completely blocked.  We're suspecting there are some EMC issue on certain brushed motors used the truck but it is not under our control.   After we remove the power supply of the board and give back the supply, the board starts to work again. Someone suggest me some latchup phenomena and I think it could be a possible explanation. Now: how can I find what is the pin (or what are the pins) susceptible to the EMI? There could be some traces the phenomena leaves on the MCU?  Thanks!

Bonjour,Je travaille sur une carte STM32U5G9J-DK2 avec ThreadX + USBX (Host Mass Storage) et TouchGFX.Mon objectif est simple ::backhand_index_pointing_right: lire le contenu d’une clé USB (fichiers / répertoires) lorsqu’elle est connectée en USB Host.Cependant, dans STM32CubeU5, j’ai constaté que :Le système de fichiers a été migré de FATFS vers FileXLes exemples FileX fournis concernent principalement SDMMC / Flash / QSPIJe ne trouve aucun driver FileX officiel pour USB Host Mass StorageLorsque j’essaie d’utiliser FileX avec USBX Host MSC, j’obtiens des erreurs de compilation et d’architecture :absence de fx_stm32_disk_driverincompatibilité entre UX_HOST_CLASS_STORAGE et fx_media_opentypes FileX (FX_DIR, etc.) non reconnus:backhand_index_pointing_right: Ma question est donc la suivante :Existe-t-il une solution officielle et supportée par ST pour utiliser FileX avec USBX Host Mass Storage (clé USB) sur STM32U5 ?Ou bien :FATFS reste-t-il la solution recommandée pour la lecture de clé

Our product is a space device and as a result, we've had to recently do some radiation testing of the device. In particular, focused on the STM32H755 processor that runs the board.I'm looking for any papers/references/app_notes, anything, that can help me to gather details about how the processor performs in a radiation environment.And yes, I realize this is not a rad-hard or rad-tolerant processor. 8-)Thanks.-brad w. 

Hi all.I want to do read/write on eeprom microwire 93c66 but there is no open source HAL library that I can find. how can I do it? I am new to stm32.Thanks

TL;DR: The receiver ESP32-LoRa node is showing garbage values instead of accelerometer values. The STM32 - LoRa sender node does read correct values from the MPU6050 sensor, as we confirmed that through PuTTY. .ioc configuration Context: So I am trying to program an STM32F411CEU6 module to read accelerometer values from MPU6050 (a 6-axis motion sensor). Then what I am trying to do is send those values to an ESP32 module. I am using Ra-02 SX1278 LoRa boards as the transceiver for the communication. We verified that the values were read properly by printing the MPU6050 sensor readings to the serial port. At the receiver end, we used Sandeep Mistry's LoRa.h library for programming the ESP32 in Arduino IDE. Clock Configuration for ref.Issue: The receiver end was receiving garbage values when we tried to monitor the sent values. Even the code in void setup() was taking a while to execute. I believe the issue is with configuring the LoRa parameters between the sender and recei

I want to use ILID9341 screen on STM32F407G-DISC1 without any libraries, just spi protocol. However, while the screen turns on, I can't draw anything on it. Why is this the case?This is SPI configuration.I have checked the physical wiring, and it seems to be correct.This is the code that is relevant for the LCD screen (there is also a code for functions for reading values from accelometer, which is probably not relevant).#define RST_GPIO_PORT GPIOD #define RST_GPIO_PIN GPIO_PIN_9 #define DC_GPIO_PORT GPIOB #define DC_GPIO_PIN GPIO_PIN_14 #define SET_ROW_CMD 0x2B #define SET_COL_CMD 0x2A #define SET_COLOR_CMD 0x2C void Reset_Screen() { HAL_GPIO_WritePin(RST_GPIO_PORT, RST_GPIO_PIN, GPIO_PIN_RESET); // pull low HAL_Delay(10); HAL_GPIO_WritePin(RST_GPIO_PORT, RST_GPIO_PIN, GPIO_PIN_SET); // release reset HAL_Delay(120); } void Write_Rectangle(uint16_t row_lower, uint16_t row_higher, uint16_t col_lower, uint16_t col_higher, uint16_t color) { //16 bit/pixel color order (R:5-bit,

This is my first foray into STM32. I bought a couple of WIOE5 lora modules. This post will not let me post links to the the WIOE5 datasheet.  I bought an STlink V3mini from Waveshare. There is not a datasheet available from waveshare.  I downloaded STM32 Cube Programmer. I have read that before using the Arduino IDE to program the STM32, I need to install a bootloader via cube programmer. While trying to upload a bootloade via cube programmer, I have a steady 3.3 volt power supply going to my MCU/pcb. My understanding is that the STM32 mcu needs to be externally powered before using the STlinkV3. When powered, I can confirm with a DMM that I am getting about 3.27 volts to the STlink. The cube programmer says that my target voltage is 3.25 but it will not connect. The error message is “No STM32 target found! If your product embeds debug authentication, please perform a discovery using Debug Authentication”. The WIOE5 module is brand new, never been programmed before. I want to

helloI want to use your api to speed up the developpment of a driver based on spi communication, this function seemed appropriate in your stlink-v3-bridge-v1-2-0:Brg_StatusT Brg::ReadSPI(uint8_t *pBuffer, uint16_t SizeInBytes, uint16_t *pSizeRead)unfortunatly I found this comment:* In #SPI_DIRECTION_2LINES_FULLDUPLEX dummy data are sent while receiving.and i check with a scope that it is the case (data written are '0'),this is a pity because read/write are frequently simultaneous in spi,is there a possibility to send data instead of dummy in the mean time we are reading ?regardsBenjamin

Split from Issue with UART/USB Rx interrupt in STM32F407VGT6 and using DP83848 LWIP stack - which was solved some time ago.@Satya_VVM can you help me with the same project.I am working on UART to ethernet convertor but I am not able to find any reference .

Hi Team,This is Vamsi. I am using a smart display with the STM32C091 MCU and would like to implement OTA updates for this chipset. Could you please suggest the best possible way to achieve this?

Hello Sir,I would like to request your guidance regarding the use of an STM32F103 microcontroller as an ST-LINK programmer. I have already flashed a bootloader HEX file intended for ST-LINK functionality into the STM32F103 device. However, I would like to confirm the following points: Is any additional driver, firmware, or configuration file required on the PC side or MCU side to make the STM32F103 work properly as an ST-LINK programmer? Is the flashed bootloader alone sufficient, or are there any specific steps or tools recommended by ST to complete the setup? Could you please provide or point me to the official/original ST-LINK bootloader or firmware source for STM32F103, if available? Are there any reference documents or application notes that explain this implementation in detail? Your support and clarification on this matter would be highly appreciated. Thank you for your time and assistance.

Hi everyone,I am working on an STM32-based project and occasionally facing an issue where the MCU freezes during normal operation. There’s no hard fault or obvious error, and the issue doesn’t happen consistently, which makes it harder to trace.So far, I have checked:Stack and heap usageWatchdog configurationPower supply stabilityBasic clock and reset settingsThe project runs fine most of the time, but under certain conditions (long uptime or repeated operations), it becomes unresponsive and requires a reset.I wanted to ask the community:What are your go-to steps for debugging intermittent freezes on STM32?Are there specific STM32 tools or registers you usually monitor for this?Any common pitfalls you’ve seen related to low-power modes, interrupts, or RTOS usage?I’m mainly looking for practical debugging tips or real-world experiences that could help narrow this down.Thanks in advance for your help.

Hi,I'm working on custom board where i have to use the USB CDC class to demonstrate the USB virtual com port feature along with data transfer and receive.We have generated the project using CubeMX 6.15 and STM32Cube IDE 2.0 but not able to detect the com port.We are using PA11, PA12, PA9 pins for USB.Kindly provide a step-by-step guide.Thank you.Ram

Hello, I need a clear step by step guide on how to set up Pnucleo lrwan 3 end node and gateway and connect both to the loriot server. currently I have issues communicating with my END node using the AT command via terminal.My other issue is that; the PNUCLEO lrwan 3 antenna is 480MHz, but when I check the paramaters of the device using terminal, I discover that the frequency is EU-868MHz, so now I have to reconfigure the device tp the right frequency, how do I do this. I have consulted the UM2587 material but it does not appear to be so clear to me.

Hi everyone,I’ve been working with STM32 for a while now (mostly CubeIDE + HAL), and like many others, I’ve relied heavily on YouTube tutorials to get started and solve specific problems. I usually discover new channels through recommendations, forums, or sometimes even via third-party YouTube tools like ytmodz, which surface modded YouTube experiences focused on uninterrupted learning. That said, while some channels explain concepts very clearly and are great for quick demos, I often find myself questioning how “correct” or scalable those approaches are for real-world projects.For example, many videos focus on getting something working fast (blinking LEDs, basic peripherals, quick FreeRTOS demos), but they often skip deeper topics like architecture decisions, low-power design, robust error handling, or long-term maintainability. I also notice very different coding styles: some rely almost entirely on CubeMX auto-generated code, others go much closer to registers, and for someone movin