MPLAB® Harmony v3 Peripheral Libraries on SAM L10: Step 4
Generate Code
Click on the Resource Management [MCC] tab on the top left pane. Click the Generate button next to Project Resources.
As the code is generated, the MPLAB® Code Configurator (MCC) displays the progress as shown below.
Navigate to the Projects tab to view the project tree structure.
Examine the generated code.
The MCC will include all the MPLAB Harmony library files and generate the code based on the MCC selections. The generated code would add files and folders to your Harmony project as shown.
Among the generated code, notice the Peripheral Library files generated for Real-Time Clock (RTC), SERCOM 1 (as I²C), SERCOM 0 (as Universal Synchronous Asynchronous Receiver Transmitter (USART)), Direct Memory Access (DMA), External Interrupt Controller (EIC), and PORT peripherals. The MCC also generates template main file (main_l10.c).
Build the project.
Click on the Clean and Build icon 
and verify that the project builds successfully.
At this point, you are ready to start implementing your application code.
