I am programming an Atmega chip using Atmel studio 7. I try to define F_CPU on the first line of the main.c file. This F_CPU definition is used inside the other files. However when I compile the program the F_CPU symbol definition can’t be seen by other files and the compiler throws the error shown in the picture.
Thanks
The picture showing the error…
[
]
>Solution :
Your #define is only visible in the main.c file. It is not defined in any other source files in your project.
What you should do:
define F_CPU in the project properties.
Right click project > Properties > Toolchain > AVR/GNU C++ Compiler > Symbols
Configuration: All Configurations
Under "Defined symbols", add F_CPU=8000000UL
from now on your F_CPU will be visible be all files in your project.