Arduino for STM32

https://www.arduino.cc/en/serial/print

Serial.println(1.23456, 4) gives "1.2346"

Well, Teensy implement some Class/API which are not implemented in Roger's core. Ex: IntervalTimer Class https://github.com/PaulStoffregen/cores/blob/fc79132670ac83ce7cae8e2bac64be109fbfe35e/teensy3/IntervalTimer.h analogReadResolution API https://github.com/PaulStoffregen/cores/blob/556b4b4c5d4c6cf...

OK
Ok, don't know if libMaple have API for this.
Anyway, it should be achievable if not available using some example available on the net and using datasheet.

You should search for "backup register"

Normally the default windows VCP driver is enough.

Hi Robca, DFU should be available soon. Probably in the next release. BennehBoy made a PR to add the support: https://github.com/stm32duino/Arduino_Core_STM32/pull/415 About CMSIS DSP, I never use it, I guess you have to include the proper header, probably the path should be added in the platform.tx...

Don't know how you handle install but Arduino_Core_STM32 require arm gcc v6.
So install it from the board manager then it will install all required dependencies (tools, arm gcc and CMSIS).

This is not the right place.
https://github.com/stm32duino/wiki/wiki ... repository

Could you open an issue on the lib this will be more easier to track.
Thanks.