#461 stm32f4x.cfg Requested Speed Too High

[Antonio Chiu]

Tested on NUCLEO-F401RE (stm32f401re). It has the slowest Fcpu (adapter speed) in the STM32F4 series.

It seems that the original adapter speed for reset-init and reset-start is too high for my board. I've reduced the speed to get rid of the errors. Technically this should work on all other STM32F4 boards as they all have higher Fcpu.

[Antonio Chiu]

My edited stm32f4x.cfg

[Tomas Vanek]

I don't have a NUCLEO-F401RE. I tested on a blackpill (STM32F401CC) with an old on-board st-link and no problems at speeds from original config. Just noticed that st-link

Info : STLINK V2J32S0 (API v2) VID:PID 0483:3748
...
> reset init
...
Unable to match requested speed 8000 kHz, using 4000 kHz
Unable to match requested speed 8000 kHz, using 4000 kHz

reduces the speed substantially. Therefore I reconnect to FT232H based adapter and tested at 12 MHz - flash erase/write/verify works just fine.

Also please be aware that we do not accept patches from mail or bug tracking. See https://openocd.org/doc/doxygen/html/patchguide.html

[Tomas Vanek]

And also note that

Info: Unable to match requested speed 8000 kHz, using 4000 kHz

is just an informational message, not error at all!

[Antonio Chiu]

Hello. I think I ve submit a pull request on that. Let me know if the project accepts.