MPLAB® Harmony v3 Peripheral Libraries on SAM D21: Step 4

By default, the Autosave MCC configuration file option is enabled. That means MPLAB^® Code Configurator (MCC) automatically saves your MCC configurations.
 

Now, generate the code by using MCC. From the left side tab, Resource Management (MCC), go to Project Resources and click on the Generate button.
 

Navigate to the Projects tab in MPLAB X IDE to view the project tree structure.

Examine the generated code as shown in the following image.

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 (PLIB) files generated for Real-Time Clock (RTC), SERCOM 2 (as I²C), SERCOM 3 (as Universal Synchronous Asynchronous Receiver Transmitter (USART)), Direct Memory Access (DMA), External Interrupt Controller (EIC), and PORT peripherals. MCC also generates the template main file (main_d21.c).

Build the project by clicking on the Clean and Build and verify that the project builds successfully. At this point, you are ready to start implementing your application code.