OS_DisableInterrupts_IrqAndFiq

C Specification

#include <nitro/os.h>

OSIntrMode OS_DisableInterrupts_IrqAndFiq( void );

Arguments

None.

Return Values

The state before the function is called. This is the logical sum of OSIntrMode_Irq enum value and OSIntrMode_Fiq enum value.

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

Returns the OSIntrMode_Fiq enum value:

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

Description

This function disables IRQ and FIQ interrupts. This disables all interrupt master enables. If IRQs are disabled with this function, no interrupts will occur even if IRQ interrupt causes are individually set to enable.

They are most likely useful for returning to the previous status.

Internal Operation

The CPSR register (current program status register) IRQ and FIQ interrupt control bit are set (the set is disabled).

See Also

OS_EnableInterrupts_IrqAndFiq, OS_RestoreInterrupts_IrqAndFiq, OS_DisableInterrupts

Revision History

03/08/2005 Standardized the Japanese word for "interrupt."
03/04/2004 Transition from OS_DisableInterrupts.