Arduino for STM32

if you can output to the serial monitor I'd suggest patch Serial.print() statements in the code, to see what is happening there are some things that is a little curious https://github.com/bmellink/IBusBM/blob/master/src/IBusBM.cpp#L84 #if defined(_VARIANT_ARDUINO_STM32_) void IBusBM::begin(HardwareS...

check the core you used. it may help to have #include <Arduino.h> in there, normally not needed.

that should work for 'official' core, e.g.
on datasheet, section 5.3.4 Embedded reference voltage
https://www.st.com/resource/en/datashee ... f103c8.pdf
that is the adc value you get for the internal voltage 1.2v

stm32(f103) do not use a 'reference voltage' as like the Atmega. the top of the range is 3.3v VDD, bottom is 0v GND if you want to read the internal AVREF in stm32f103 you could try using these https://github.com/stm32duino/wiki/wiki/API#adc-internal-channels look up the specs sheet for what that is...

i looked at some codes https://github.com/fsagbuya/variant-acsip/blob/main/ACSIP_S76S/variant.cpp it seemed you are using HSI? i.e. internal on chip oscillator can you try using one of the generic variants? choose one of those boards e.g. Generic L072RBTx or Generic L072RZTx I'm guessing they may wo...

While you make the variant there are quite a few dependencies I'd suggest take a look at how others did it with the custom boards here is an entry in boards.txt for Piconomix PX-HER0 board https://github.com/stm32duino/Arduino_Core_STM32/blob/main/boards.txt#L4184 their specific variant files are fo...

you could start with a 'generic' variant. the art of making a variant is, make a copy of the structure all the files in the variant. e.g. use generic as example then make something similiar and update boards.txt similarly. then one of the more important things is if you want to use HSE - your extern...

I'm not familiar with the requirements of USB host, i think host is 'a lot more difficult' vs being a device. among the things, it needs to enumerate buses/devices, poll the buses/devices, power the buses etc. nevertheless someone has done something, it isn't yet committed, but you could probably pu...

copy out that tools folder, that you found, that stm32flash utility and script can still be used for manual firmware install. install your core base on this https://github.com/stm32duino/wiki/wiki/Getting-Started this is the 'official' stm32duino core. you would need to select your board (it won't b...

install putty from your distribution source e.g. for debian based distributions (e.g. ubuntu) apt-cache search putty one of the entry should be putty - Telnet/SSH client for X apt-get install putty you would likely need to add a sudo in front of that that /dev/$1 you can try patching it to your actu...