Any standard hardware to start with?

[asipo]

I made a breakout board using a universal PCB but failed to make external clock work.
The blink example can be uploaded using bootloader(UART1) but blinking period is 9 times longer than expected.(same with and without 8MHz or 16MHz crystal)
So I want to make a PCB and wonder if any standard hardware or reference design exists.
It would be great if I quick-start Koduino just like Arduino.
Also in installation guide and board.txt, the HSE is set 16MHz while system_stm32f37x.c seems to be generated for 8MHz. (I am not sure, I am just a beginner) It would be appreciated if you can check this out.
Thank you.

[avikde]

Are you using the F373? The clock settings for that one are unfortunately the least flexible since I stopped using it a while back.

You should download the clock config tool from ST http://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-configurators-and-code-generators/stsw-stm32113.html and if you can open in Excel with macros enabled, you should be able to generate the system_stm32f37x.c file. Once you get that generated with the right settings, you can replace the system_stm32f37x.c with your own.