STM32 MCUs Embedded software

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Resolved! How can I back to use UBS-Link?

My stm32l4 discovery kit iot node b-l475e-iot01 stopped the connection via connector 8, I couldn't do it at all, so I used ST-LINK V2, I got communication, but I can't use the USB again, I didn't touch the hardware, absolutely nothing.

RSant.1 by Associate
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DFU Bootloader mode activation STM32F405

Hello,I tried to develop my first µC board inspired by the " adafruit feather STM32F405 express". For layout I used KiCad and the board is made by Chinese PCB manufacturer JLCPCB. To activate the DFU bootloader, the BOOT0 pin must be connected to 3.3...

SBoug.1 by Associate
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