Syntax

See Syntax for type attributes used on functions.

Description

The __fiq keyword declares a fast interrupt function. All interrupt functions must be compiled in Arm mode. A function declared __fiq does not accept parameters and does not have a return value. This keyword is not available when you compile for Cortex-M devices.

In 64-bit mode, this keyword cannot be used.

Example

__fiq __arm void interrupt_function(void);