STM32 MCUs Products

hi i am saishiva i am working on the STM board from 10 days but i am not getting the clarity about the how to activate the RS485 using the modbus protocol can you pleaae help on that  

Dear Sir,I have interfaced SDHC card 32GB of Sandisk with STM32L452RET6 microcontroller SDMMC1 peripheral in mode - SD 4 bit wide bus. In my device SD card as a Datalogger.Issue - When my device is working mean data is logging (Data writing in SD card). In this period i have cut SD CMD line and again connected.In this period - function this SDMMC_GetCmdResp1 return a error.In working condition - Which routine we have to call to fix this issue???Please suggest solution for this issue.....

I saw on NUCLEO-U5A5 schematics - there is a level shifter for signal T_VCP_TX:a bit obvious: if MCU jumper is set to run on 1V8 VDD - an external UART receiver (e.g. CP2102N) would not get anymore correct UART_TX signals (yes, it does not anymore with 1V8 logic on TX).Wouldn't it be enough to use an Open Drain signal on MCU (for UART_TX) and an external pull-up to 3V3?The UART_RX should be OK, even MCU on 1V8 MCU VDD, but assuming RX is 5V tolerant.Here what I mean - and it works!Just configure the UART_TX as GPIO_MODE_AF_OD and it should work also without a need for a level shifter (with external pull-up).

Hello,which interfaces does a virgin STM32C0 in SO8N offer on the first boot for programming? AN2606 says USART1 and I2C1. In other cases, AN2606 adds a note when SWD does not work, but no such note is there for STM32C0. So, I assume SWD is supported too. However, while SWD is on PA13 and PA14 and I2C1 is on PB6 and PB7, PA14 and PB6 is muxed to the same pin in the SO8N package. So, this seems like a conflict. Did I understand something wrong?If SWD is not supported in the bootloader, is there a way to prevent the bootloader (for example, with the BOOT0 pin)? I want to put SWD on a pin header for debugging anyway and it would be annoying to need extra pins just for the initial programming.

I'm using an STM32H745 and have developed the Boot code, which works as expected when built as part of an application.  However, having converted the Boot code to a static library and linked it into the same application the Boot startup section .isr_vector is not detected and hence not located at the appropriate location defined by the Application linker script.Is there something I need to add, either to the Boot library or the Application so that the library section get located at the correct address?Other than making the Boot source code a library, rather than part of the Application nothing else has changed.

Hello,I'm writing a Flash HAL driver in order to understand better how this CHIP work.My functions at the moment work correctly but for some page I have an HardFault(During erase).For example I can't erase/write the page 0 and others pages.Please could you explain me why?Thanks!

Hi Everyone,I am currently using STM32F103 for making a usb hid which acts as both, a keyboard and a gamepad.Please take a look at the descriptor and code below.Both of these work properly when used individually but when I combine them both and add report ID no input is detected. In my main function I detect the key press and then assign the data in buttons and keys.     0x05, 0x01,                    // USAGE_PAGE (Generic Desktop)    0x09, 0x05,                    // USAGE (Game Pad)    0xa1, 0x01,           &nb

we are using EXTI1 interrupt in our project based on stm32f446. But the Interrupt handler is not firing.We looked into the interrupt enable registers, Mask registers, etc and all seems fine and a timer interrupt also in the project, which is triggering fine. Please help to rectify this issue.Clock configuration code generated: is the clock configuration settings correct??void SystemClock_Config(void){RCC_OscInitTypeDef RCC_OscInitStruct = {0};RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};/** Configure the main internal regulator output voltage*/__HAL_RCC_PWR_CLK_ENABLE();__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE3);/** Initializes the RCC Oscillators according to the specified parameters* in the RCC_OscInitTypeDef structure.*/RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;RCC_OscInitStruct.HSIState = RCC_HSI

Hi all,I'm using application note AN4636 for LC sensor.I tested with the example source code, and they work well for one sensor.But when I use multiple sensors, I face an issue. If I use the same value for inductor and capacitor for each sensor, the oscillators between these sensors are affected, the amplitude decrease and the shape change.I can avoid this issue by adjusting the value of inductors to create difference oscillator frequencies, but I think it is not good solution to ensure the stable and consistency of product.Can anyone give me advice to solve this problem?I appreciate this help. Thanks!  

I am working on STM32F407ZET6 with DMA+SPI in slave mode. Trying to reset DMA Counter when NSS is high to avoid shifted data transmit.TX and RX DMA are working on Circular mode.This is my tx data typedef struct { uint8_t InputState[4]; uint8_t reserved1[4]; uint8_t reserved2[4]; uint8_t reserved3[4]; } SyncDataTX;  Inside init function, i did *((uint32_t*)(txData.InputState)) = 0x11121314; *((uint32_t*)(txData.reserved1)) = 0x15161718; *((uint32_t*)(txData.reserved2)) = 0x19202122; *((uint32_t*)(txData.reserved3)) = 0x23242526; HAL_SPI_TransmitReceive_DMA(&hspi1, (uint8_t *)&txData, (uint8_t *)&rxData, sizeof(txData)); Inside interrupt function, i did __HAL_DMA_DISABLE(&hdma_spi1_rx); __HAL_DMA_DISABLE(&amp

i am sorry for creating a lot of post recently but i just can not program my microcontrollers. when ever i try to program it i get this:STMicroelectronics ST-LINK GDB server. Version 7.5.0Copyright (c) 2023, STMicroelectronics. All rights reserved. Starting server with the following options:Persistent Mode : DisabledLogging Level : 1Listen Port Number : 61234Status Refresh Delay : 15sVerbose Mode : DisabledSWD Debug : EnabledInitWhile : Enabled Target no device found Error in initializing ST-LINK device.Reason: No device found on target. i have a stlink v3 mini and 3 stm32c031g4u6 microcontrollers soldered to proper breakout boards.i

Hi,Is it possible to have a single ADC result transferred to two different memory locations using DMA without CPU intervention?Specifically I want DMA to take a single reading from an ADC, transfer it to one location on the STM32H747 CM4 and another location on the STM32H747 CM7. Thanks!

Hello,I'm trying to program G491KCU6 board via UART1 and I'm not able to connect to st-programmer. I don't know whether the board is actually entering Boot0 or not. I have PB8 with 10K to GND and I pull it up during connection to enter Boot0. Below is the schematic. Any recommendations? My serial to USB converter shows Rx LED ON when I try to enter Boot0. 

Hi,I'm trying to send data from ADC to FMAC directly via DMA in circular mode. From the STM32G4 reference manual (dm00355726) page 402:"Peripheral-to-memory, memory-to-peripheral, memory-to-memory and peripheral-to-peripheral data transfers"But I can't find anything on STM32CubeG4 that configures that. Here's a screenshot: I've tried writing to FMAC write data register directly usingHAL_ADC_Start_DMA(&hadc1, &FMAC->WDATA, 1)But it doesn't work.What worked for me was setting the DMA circular mode for both ADC and FMAC, then syncronize it using DMAMUX requests. Although this eliminates the C

Hi all!I am struggling to couple STM32F469ZGT6 (running at 180 MHz) with SDRAM type IS42S16160J-6TL from ISSI (datasheet here: https://www.issi.com/WW/pdf/42-45S83200J-16160J.pdf ).SDRAM is organized in 4 banks, each having 8192 rows x 512 columns x 16 bits wide data bus, and is connected to MCU like this: FMC is configured in CubeMX like this:

Does the STM32 series have a document similar to AN4035 regarding flash programming through JTAG？

I'm currently working on a project using the STM32L433 MCU with the SD peripheral. While trying to use the HAL driver with read and write operations the functions return an timeout. While tracing the command and data lines the command is sent but the FIFO is not emptied this leads to the timeout as the SD card isn't done writing. Also while only reading the data only the command is sent and no data is exchanged.In the initialization of the SD card data is exchanged so the functionality of the SD card is working. Also multiple cards are used to test and all have the same response as it doesn't send the data. In the screenshot is CMD24 sent and a response from the card with the status in transfer state and ready for data flag is 1. Card data as the CID and CSD are received properly.

Dear STMicroelectronics Support Team, I hope this message finds you well. I am interested in identifying a microcontroller that meets certain specifications for my project. I would appreciate your assistance in identifying the most suitable MCU. MCU Requirements: Low-pin package type: SO (Small Outline), SOIC (Small Outline Integrated Circuit), or TSSOP (Thin Shrink Small Outline Package). Should be I2C (Inter-Integrated Circuit) compatible. Must have a built-in Real-Time Clock (RTC) module. Should include a VBAT pin for battery backup. If you could provide information about any MCU that meets these requirements or suggest where I can find such information on your website, I would be very grateful. Thank you very much for your time and assistance. Sincerely,

Hey,I'm completely new to the topic of microcontrollers and currently trying to prepare for an internship (preparation and prior knowledge are not required, but I would still like to prepare myself). Since I already the chip (STM32L4A6) I'm going to work with, I bought a board (NUCLEO-L4A6ZG) with this chip. Despite finding a diverse set of resources and examples for other boards (I also checked the GitHub repos for examples, but the board wasn't available), but the only thing I could achieve was programming the LEDs and playing around with the buttons. The configuration of printf has so far been a complete failure (I tried using UART).I've tried using the datasheet and the user manual for help, but that hasn't really helped me so far as I felt completely overwhelmed and lost.I'm sorry if this is not the right place

I'm using the USART on my STM32G474 in FIFO mode with LL-libraries. The datasheet says:" However the RXFIFO default width is 12 bits. This is due to the fact that the receiver does not only store the data in the FIFO, but also the error flags associated to each character (Parity error, Noise error and Framing error flags)."I want to read these error flags, but it is not clear if I have to read the flag register first and then the data register or the other way round.

Hello, all.I'm trying to design and build my first STM32 project, a timer. I'm using the STM32L101K4 and have it configured as illustrated in the attached screenshot. The pins are configured in STM32CubeIDE as:External LSE on 2 & 3LCD connections on 7-13, 25-27. Pins 8 and 25 are PWM pins to control the LCD's backlight and contrast.A rotary encoder and push-button switch on 19-21.Some LEDs on 22, 28 & 29.SWD on 23 & 24.And, an unassigned GPIO pin on 30.I also have configured:System Core->RCC->LSESystem Core->SYS->Debug Serial WireTimers->TIM2->Channel 1 PWM Generation and Channel 3 PWMAll of these are configured without conflict, I think.I'm puzzled now that I can't assign a role like GPIO_Output to unused pins, such as 6, 14, 15, 18 or 31. Assigning a role such as GPIO_Output (I didn't try other roles) generates a conflict in the configuration, with yellow triang

Good Evening Ladies and Gentlemen, A short introducing purpose of mine: int main(void) { RCC->AHB1ENR |= 0xFC; // ---> Here I would like to open the Port clock RCC->APB1ENR |= 0xFC; // ---> Here I would like to open the USART2 clock - in this context not relevant GPIOA->MODER |= 0x55555555; // ---> Here I define Port A as output GPIOC->MODER |= 0x55555555; // ---> Here I define Port C as output GPIOA->ODR |= (1<<2); // ---> Here I would like to set PA2 "high" GPIOC->ODR |= (1<<13); // ---> Here I would like to set the onboard LED (PC13) "high" while(1) { GPIOA->ODR |= (1<<0); // Here I would like to "toggle" PA0 and PA6 GPIOA->ODR |= (1<<6); delayMs(50); // It only is a not relevant "delay" for this purpose GPIOA->ODR &= ~(1<<0); GPIOA->ODR &= ~(1<<6); delayMs(50); } }  

I have a laptop with Wifi. I directly connect a straight-through ethernet cable between my laptop and my custom STM32 board. Using IPV4.   STM32 board with LWIP, set as server, IP 192.168.3.1, Gateway 192.168.3.0, Subnet mask 255.255.255.0, port 39 Laptop is client, set to IP 192.168.3.2, Gateway 192.168.3.0, Subnet Mask 255.255.255.0 in Control Panel->Network and Internet ->Network Connections, Ethernet Icon, Properties, Internet Protocol Version 4 (TCP/IPv4) My STM32 board starts first, no issue with LWIP initialization. Then I start Hercules application (from HW-group.com), it shows on “your PC network settings” the wifi IP, gateway and netmask. This is the problem. When I ping from laptop on Hercules, it works fine. When I try to connect from my laptop to STM32, it fails. Ethernet icon in Network connections has a red cross.   I had all this working before: I took my laptop home, came ba

Hello Community,I'm using GT911 with STM32F746 over I2C. I have noticed some time it stucks when multi touch is used (very few times in single touch as well). Upon debugging I noticed a change of voltage level of Interrupt pin.In working state, INT pin stays High ideally but after the touch freezes, it stays Low with spikes.Please find the attached screenshot of waveforms.INT pin when GT911 stucksINT pin when GT911 works fineAls

Hello,I am currently using a custom-built board designed to the nRF24L01+ specification and using the same exact circuit provided in their datasheet. It is connected to my STM32F103 through SPI. I am currently using this library to test out this board: https://github.com/elmot/nrf24l01-lib/tree/masterThe board is able to successfully verify that it is connected to the NRF chip using the nRF24_Check() function. Furthermore, the nRF is returning back that a packet (without AA) has been sent successfully and subsequently clears the TX FIFO. On my receiver device, the RX FIFO does not get populated nor any interrupts triggered by the nRF which leads me to the assumption that there is a problem somewhere with the wireless transmission of the packet. If I were to enable AA, and also put my receiver device on the ESB RX example, then the nRF would