Using MPLAB® Harmony v2 to Control Interrupts

The MPLAB® Harmony System Service can be used to control the following types of interrupts:

  1. System-level interrupts
  2. Individual peripheral interrupts
  3. Interrupts generated from an External Input Pin (INTx.)

System-Level Interrupts

The Application Programming Interfaces (APIs) provided in sys-int-pic.c allow the application program to control system interrupt properties. System-level interrupt functions are typically called during an application start-up or initialization process. System interrupt tasks handled by the interrupt System Services include:

  • Initializing the interrupt system.
  • Enabling and disabling global interrupts.
  • Assigning user-written service routines to interrupt vectors.
  • Assigning shadow register sets to interrupt priorities.
System-Level Interrupts
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Individual Peripheral Interrupts

Interrupt System Services provide the ability to modify the properties for interrupt capable peripherals. The APIs provide the ability to:

  • Enable/disable individual peripheral interrupts
  • Set interrupt priority and sub-priority levels
  • Clear/Set an interrupt request flag
Individual Peripheral Interrupts
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External Interrupts with an INTx pin

The PIC® 32 MCU can have several pins configured to generate interrupts. Interrupt System Services allows the programmer to set the parameters controlling these pins.

External Interrupts
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Entire Interrupt System Services Interface
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Entire Interrupt PLIB Interface
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