This is an example project which includes a copy of https://github.com/gicking/STM8_headers by Georg Icking-Konert.
The library is included via copying it in the lib/ folder, adding a small library.json to it and referencing it in the platformio.ini via lib_deps. The code from the original example project (blink_noInterrupt) is slightly adapted regarding the relative include paths and some verbosity via #warning pragmas for the selected pin mapping.
The platformio.ini contains 3 environments for the STM8S-DISCOVERY, the NUCLEO-8S207K8 and the NUCLEO-8S208RB boards. Select the correct environment per docs. The latter two board definitions are work in progress (see issues) and pulled in from a modified platform.
Compilation should work fine for all environments, but uploading and confirming that the firmware executes correctly has not been done, as I lack the hardware for that.
Environment Status Duration
-------------------- -------- ------------
stm8sblue_stm8s103f3 SUCCESS 00:00:01.918
stm8sdisco SUCCESS 00:00:01.877
nucleo_8s207k8 SUCCESS 00:00:01.890
nucleo_8s208rb SUCCESS 00:00:01.874
Thanks to new code in the modified platform, debugging via OpenOCD is enabled by default for all boards.
Tested for an STM8S103F3 board and confirmed working.