Hi …
In the meanwhile I found the root cause for my DMA problems, they have not been related to the STM32 Cube version. So far so good.
I have also tried to patch the framework-stm32cube for F1 chips manually by replacing the files installed at /home/julian/.platformio/packages/framework-stm32cube/f1 by those which came with the STM32Cube_FW_F1_V1.6.0 package and observed no problems compiling my code. Also all the LL drivers get compiled. My next step will be using the LL drivers by trying some of the existing examples.
br J.