15.3 Writing an Interrupt Service Routine

Following the guidelines in this section, you can write all of your application code, including your interrupt service routines, using only C language constructs.

All ISR code will be placed into a named section that starts with .isr. A function with a section attribute will prepend .isr to the name given. Code compiled with -ffunction-sections will also prepend .isr to the section name. For details, see section -ffunction-sections.

If you have previously created your own linker script file, you may need to modify your linker script as per the Readme file found in the pic32a/docs subdirectory of the MPLAB® XC32 install directory.