Step 4: Generate Code
MCC will include all the MPLAB Harmony v3 library files and generate the code based on the MCC selections. The generated code will add files and folders to your Harmony project.
Among the generated code, notice the peripheral library files generated for RTC, SERCOM 5 (as USART), DMA, and PORT peripherals. MCC also generates a template main file (main_sam_e51_cnano.c).
Navigate to the Projects tab to view the project tree structure.
At this point, you are ready to start implementing your application code.