STM32WBA missing target configuration file

[janhenke]

In commit 54c8f87 support for the STM32WBA chip was added to the STM32L4x flash driver, unfortunately without any target configuration file.

Even with the above commit added to my local OpenOCD, I cannot flash my application into the board, as neither the existing target/stm32l4x.cfg nor target/stm32wbx.cfg work with the board. I have no prior experience with writing my own target config, so I am quite lost now. I have found the JTAG ID of the chip in the reference manual (RM0493 section 40.2.8), but cannot find the correct SWD ID. Also I am not sure what other changes need to be done to adapt an existing config file for this chip.

Can someone with more experience look into creating a working STM32WBA target config file? I noticed the same is also true for the STM32C0x chip (flash driver yes, target config no).