About Gifford

Gifford · 2025-03-23

Hi there!I've created a custom STM32F411CEU6 Board with external HSE und LSE. While the HSE works when running my user program, the Bootloader hangs within boot phase (i think).When starting bootloader, BOOT0=1 und BOOT1=0. I powered direcly on VDD, ...

Gifford · 2025-03-26

yes, I checked. While running user program it runs at 25M. But it's not oscillating on usb bootoader....maybe an issue with the startup time from crystal??

Gifford · 2025-03-26

No, i havn't such a crystal in that footprint. I choosed the 25Mhz crystal because of the black pill board. It uses the same frequency and all works fine. AN2606 mentions that the external clock can be up to 26 Mhz.Do you think my choosed crystal cou...

Gifford · 2025-03-25

Yes, HSE starts in user program. My observations are, that the HSE doesn't start if I press BOOT0=1. As I read in the docs, the HSI tries to start the HSE und changes system clock. After that the USB description is sent. But there seems to be a (hard...

Gifford · 2025-03-24

Any idea?

Gifford · 2025-03-24

ok, thanks for clarifying!However, it is still not clear to me why the USB boot does not work. I have installed all stm windows drivers. on the black pill board, the bootloader is displayed as “STM Bootloader” in the device manager as expected. on my...

User statistics

User Activity

STM32F411 Bootloader hangs

Re: STM32F411 Bootloader hangs

Re: STM32F411 Bootloader hangs

Re: STM32F411 Bootloader hangs

Re: STM32F411 Bootloader hangs

Re: STM32F411 Bootloader hangs