STM32 MCUs Embedded software

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Regrading STM32L452RET6 bootloader issue

Hello there,I am currently working on STM32L452RET6 microcontroller in which I am trying to flash hex file using software STMFlashloader Demonstrator via UART protocol.​When I shift BOOT0 pin to high (3.3v), program goes into bootloader mode, and nBO...

JDhaw.1 by Associate
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  • 4 replies
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HAL_SD_ERROR_TX_UNDERRUN when using FATFS

I'm trying to use FATFS on NUCLEO-F401RE to write a file into the SD Card.I generated the project into cube MX and added thi code before the while(1) loop: /* USER CODE BEGIN 2 */ temp = f_mount(&StrutturaCtrFS,"",1); if(FR_OK != temp){ while(...

ABatt.1 by Senior
  • 436 Views
  • 1 replies
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USB Device Descriptor Request Failed

Dear Customer SupportI'm using the USB CDC class (Virtual COM Port) on STM32H7.When I unplug and plug the USB cable during comport communication, occasionally, the device manager display shows "Unknown USB device (device descriptor request failed)".I...

KKado.1 by Associate II
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  • 4 replies
  • 1 kudos

Resolved! STM32H7 USB custom class

Hi,I want to use my own custom usb device class base on usb core provided by ST. Inspecting the code, I found that "DataIn" and "DataOut" callback functions provided by the class to usb core are called at the END of the data in or out stage... Callin...