1. Error message:
D:\Software\Keil5\ARM\PACK\Keil\STM32F1xx_ DFP\2.1.0\Device\Include\stm32f10x.h(483): error: # 5: cannot open source input file “core_ cm3.h”: No such file or directory
2. Solutions
Find the include folder under the kevil5 installation directory and add core_ Cm3. H file, recompile.
core_ Cm3. H can be found in the STM32 official firmware library. Just download the firmware library.
3. Recompile the results