OS_EnableInterrupts_IrqAndFiq


C Specification

#include <nitro/os.h>

OSIntrMode OS_EnableInterrupts_IrqAndFiq( void );

Description

This function enables the IRQ and FIQ interrupts. It is the master enable for all interrupts. Even if the IRQ interrupt factor enable is set separately, interrupts will not be generated if IRQ is prohibited with this function.

Arguments

None

Return Values

Status prior to calling this function. This is the logical sum of OSIntrMode_Irq enumerated and OSIntrMode_Fiq enumerated.

OSIntrMode_Irq
OS_INTRMODE_IRQ_DISABLE IRQ Disable (prohibited)
OS_INTRMODE_IRQ_ENABLE IRQ Enable (permitted)

OSIntrMode_Fiq
OS_INTRMODE_FIQ_DISABLE FIQ Disable (prohibited)
OS_INTRMODE_FIQ_ENABLE FIQ Enable (permitted)

Internal Operation

The CPSR register (current program status register) IRQ and FIQ interrupt control bits are reset (the reset is enabled).

See Also

OS_DisableInterrupts_IrqAndFiq, OS_RestoreInterrupts_IrqAndFiq, OS_EnableInterrupts

Revision History

03/04/2004 Transition from OS_EnableInterrupts