Arduino for STM32

Hello professionals,

I am looking for the bootloader so that I can use my USB board, with STM32F072C8T, with Arduino IDE. I want to be able to compile Arduino sketch and then upload it to my USB using Arduino->Sketch->Upload.

I do not know where or how to get this bootloader from this Git repo here:
https://github.com/stm32duino/Arduino_Core_STM32

Any hands-on help is greatly appreciated.

Thanks for your great support.

F072C8 has DFU bootloader, so just reset it into bootloader and you can flash it using USB.

Also STM does not provide software USB bootloaders.
You can probably make one using this: https://github.com/Serasidis/STM32_HID_Bootloader