#include <nitro/os.h>OSIrqMask OS_EnableIrqMask( OSIrqMask intr );| intr | The IRQ interrupt causes to be enabled (expressed as a logical sum). |
Returns the IRQ interrupt cause parameters from before this function was called. See below for information about causes. The return value is the logical sum of the causes that were formerly set.
Sets IRQ interrupt parameters. This function enables the designated causes in addition to the currently enabled parameters.
Specify the interrupt causes to enable using the intr argument. See below for information on the types of interrupts.
// Enable V-Blank interrupts and DMA0 interrupts in addition to the current settings.
OS_EnableIrqMask( OS_IE_V_BLANK | OS_IE_DMA0 );
This function adds the specified causes in addition to the current settings. OS_SetIrqMask is used to overwrite and set a specific cause. However, because there may be interrupt cause settings defined by the system that we do not want to change, it is best not to use the OS_SetIrqMask function, because that overwrites all settings. In nearly all cases, the OS_EnableIrqMask() function should be used to set only the specified causes.
Operates on one of the I/O registers, IE (Interrupt Enable).
OS_DisableIrqMask, OS_SetIrqMask
2008/05/30 Moved the types of interrupts to a separate page.
2005/03/08 Standardized the Japanese term for of "interrupt."
2004/03/12 Emphasized the differences with OS_SetIrqMask().
2003/12/01 Initial version.
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