How can I change the MCU used in the project which was created as STM32 projct and "empty project" not CUBEMX. The Option fo MCU is greyed out in Tool Settings.
I had problem with printing floats in printf. The solution was to fix the linker file with wrong stack address and I also had to remove the default included file "sysmem.c" since the function _sbrk always failed and malloc was not working.
