my bootloader runs very slow,what happened?

Bootloader for STM32F103 and STM32F4xx micro-controllers
No special driver is required. Support for Windows, Linux and Mac Operating System
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mcykin
Posts: 4
Joined: Sun Nov 27, 2022 11:08 am

my bootloader runs very slow,what happened?

Post by mcykin »

hi,
i've used STM32duino to flash my STM32F103RCT6 board,but recently i've found a very strange bug.
when i connect my device to computer,generily,it will immenedity show a device called "stm32duino bootloader",and after a short time,connect as a device(i flash a QMK keyboard code in it),

but this time,when i connect it,computer said it was "Unknown device",and after more than 18s(i think normally was 1s), system show has boot the right device,

what happened to my board?how can i fix this delay?
thanks!
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