Arduino for STM32

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...

you did not compile with USB (CDC) Serial selected. USB Serial from your board did not appear in dmesg you can actually disconnect the FTDI dongle and just connect your stm32 board to usb. a USB Serial connection should appear in dmesg My only option is to compile using FTDI dongle. I'm using a cus...

you did not compile with USB (CDC) Serial selected.
USB Serial from your board did not appear in dmesg

you can actually disconnect the FTDI dongle and just connect your stm32 board to usb.
a USB Serial connection should appear in dmesg

in a normal PC, the 5v USB supply is normally from the SMPS (switch mode power supply), in some cases it comes from batteries e.g. notebooks. most other power sources are SMPS as well, some don't provide 5v outputs, and they use a linear regulator to remove part of that excess voltage to give you 5v...