MPLAB® Code Coverage Overview

The MPLAB® Code Coverage feature provides visibility as to what portions of your code are being executed. Run your test cases to completion for a visual display of coverage.

The MPLAB Code Coverage feature requires the following tools:

  • An MPLAB XC C compiler (either Free or PRO) that supports code coverage output, starting with MPLAB XC8 v2.10, MPLAB XC16 v1.40, and MPLAB XC32 v2.30.
  • The MPLAB Code Coverage (SW006026-COV) license that provides visibility as to what portions of your code are being executed.
  • MPLAB X IDE v5.25 or later, which supports the display of code coverage data from an MPLAB XC C compiler with the MPLAB Code Coverage license.

Code coverage is displayed in the MPLAB X IDE as:

  • Editor text highlighted by colors representing coverage:
    • green = executed
    • yellow = partially executed
    • red = not executed
  • Program memory highlighted by colors representing coverage.
  • A Code Coverage tab with a report displaying color percentages of code covered. This information may be written to an HTML report for later viewing.
Figure 1: Code Coverage - Editor Window and Code Coverage Tab
Figure 2: Code Coverage - Program Memory Window


Find MPLAB Code Coverage documentation at:

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