Error Undefined reference .c hal driver file seems missing - How to add it
After looking some more to the .project of working and non working projects, I finally manually created a "Linked file" in the Project>Drivers>STM32F4xx_HaL_Driver folder pointing to stm32f4xx_hal_pcd_ex.c
It works.
It is not clear to me yet how are defined/implemented the project drivers folder in the different Cube projects. I had made the assumptions that all hal files would appear in all folders. But this seems wrong...
JMF