Arduino for STM32

I've written assembler, but try to avoid it if I can.
If what you want is optimizing c source, what I do is compile with the '-S' option.
After compilation you then have the gcc assembler output.

$ arm-none-eabi-gcc -S ftoa.c
$ ls -l ftoa.*
-rw-rw-r-- 1 koen koen 9670 Nov 23 07:11 ftoa.c
-rw-rw-r ...

FYI. FloatToString , a library to convert float to String.

small. about 2 to 3 kbyte.
Checks for buffer overflows
fast. Does not use float or double. It's all integer math and table lookups.
plain C, no dependencies
c++ wrapper for Arduino


If you're feeling adventurous, patches for print ...

fyi: an early build of arduino-ide 2 on raspberry pi os 64bit, and an stm32 board support package.
Home directory on usb external disk recommended; home directory con internal sdcard can be painfully slow.
I'm using this for a small blue pill project. No 32bit version. sorry.

https://github.com ...

Two libraries, handy when debugging an stm32duino:
With Serial Wire Output (SWO) an stm32duino can write tracing and logging to a pc at high speed.
With semihosting an stm32duino can do keyboard input, screen output, and file I/O on the pc where the debugger is running.

For these libraries to ...