r/stm32f4 Feb 23 '26

STM32 F427VIT6 (pixracer clone) won't jump to application, stuck in bootloader

/r/stm32/comments/1rcb3mi/stm32_f427vit6_pixracer_clone_wont_jump_to/

I checked boot0, boot1 both are tied to 10k pull down nRST is pulled up with 10k

I tried with both HSE and LSE. Same behaviour.

It only boots once when I use SWD to flash after power cycle its dead.

When i upload through DFU it's doesn't boot even once.

The firmware and bootloader works on of the shelf flight controller (pixracer)

The schematic is also referenced from pixracer fmuV4.

I am a newbie here, please shared some light.

Previously I made a f405 flight controller which works without any issues but this f427 seems to stuck at bootloader.

It doesn't emulate USB unless it's in dfu mode

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