OS_GetIrqMask

C Specification

#include <nitro/os.h>

OSIrqMask OS_GetIrqMask( void );

Arguments

None.

Return Values

The setting for the current IRQ interrupt cause.

Description

Obtains the setting for the currently established IRQ interrupt cause

The returned value is the logical sum whose value corresponds to the interrupt cause from the table below.

OS_IE_V_BLANK V-blank interrupt
OS_IE_H_BLANK H-blank interrupt
OS_IE_V_COUNT V counter interrupt
OS_IE_TIMER0 Timer0 interrupt
OS_IE_TIMER1 Timer1 interrupt
OS_IE_TIMER2 Timer2 interrupt
OS_IE_TIMER3 Timer3 interrupt
OS_IE_DMA0 DMA0 interrupt
OS_IE_DMA1 DMA1 interrupt
OS_IE_DMA2 DMA2 interrupt
OS_IE_DMA3 DMA3 interrupt
OS_IE_KEY Key interrupt *1
OS_IE_CARTRIDGE Game Pak IREQ/DREQ interrupt
OS_IE_SUBP ARM7 interrupt
OS_IE_SPFIFO_SEND ARM9-ARM7 send FIFO empty interrupt
OS_IE_SPFIFO_RECV ARM9-ARM7 receive FIFO not-empty interrupt
OS_IE_CARD_DATA Card data transfer end interrupt
OS_IE_CARD_IREQ Card IREQ interrupt
OS_IE_GXFIFO Geometry command FIFO interrupt


*1 The hardware specification does not allow the use of the key interrupt. However, it can be used for waking from sleep.

Internal Operation

Reads IE (Interrupt Enable) of the IO register and returns that value.

See Also

OS_SetIrqMask, OS_EnableIrqMask, OS_DisableIrqMask

Revision History

03/08/2005 Unified the Japanese term for "interrupt."
12/08/2004 Added warning about OS_IE_KEY.
11/24/2004 Deleted OS_IE_SIO.
09/01/2004 Changed "subprocessor" to "ARM7" and "between subprocessors" to "between the ARM7 and ARM9."
2003/12/01 Initial version.