Arduino for STM32

have you tried to write some code?

Official core have a different hardware timer api, so its required to fix library to work with this core

https://github.com/stm32duino/wiki/wiki ... er-library

you can change pins of your default SPI instance by calling SPI.setMOSI/.setMISO/.setSCLK/.setSSEL before SD.begin

http://dan.drown.org/stm32duino/package_STM32duino_index.json - is a roger's core https://github.com/stm32duino/BoardManagerFiles/raw/master/STM32/package_stm_index.json - an official core about radiohead library as described here - https://www.airspayce.com/mikem/arduino/RadioHead/ it's compatible ...

Are you sure your f103rb have sdio?
As far i can remember only high density f103 chips (starting from f103xC) support it.

So I managed to run the MCU at 4MHz by looking into the cubemx generated files and copy-pasting the prescaler values in the stm32duino file: c:\Users\Razvan\AppData\Local\Arduino15\packages\STM32\hardware\stm32\1.6.1\variants\PILL_F103XX\variant.cpp I did this beause I couldn't figure out how to in...

That is because it is NOT a CDCACM device! And it will never be. It is a DFU device. As I mentioned before, you need an appropriate driver to be able to upload. Linux dont need driver for cdc or dfu profra But steve is right, your device in the dfu mode, you can try to upload to it with dfu util or...

2nd crystal is for RTC and can feed clock in low power mode, when separate vbat provided. Usualy it have 32.768KHZ frequency.

https://github.com/stm32duino/STM32Exam ... llback.ino
For 1.8.0 core

Hi all Nutsy or Mangy Dog from the old forum here... go by Mangy now tbh... Anyway sooo im glad to see the forums and site is now back up.... I had my doubts for a while i must admit. So i guess i need to get up to speed on things. I'm assuming this forum is mostly for support on the official stm32...