Status update: the basic flashing routine for STM8S modules is working, at this moment in byte mode (*). Now, when the reflashing app for STM32 is available, it can be extended to include flashing of STM8S-based modules, so we can have an unified interface.
(*) Byte mode is the slowest, word and block programming are faster, but a little bit more complex.
Would you be willing to give a status update as well as information on how to get a copy of the flashing routine?
Thanks.