IRQ Handling

Provides an API to control interrupt processing. More...

Detailed Description

Provides an API to control interrupt processing.

Files
file	irq.h
	IRQ driver interface.

Functions
MAYBE_INLINE unsigned	irq_disable (void)
	This function sets the IRQ disable bit in the status register. More...
MAYBE_INLINE unsigned	irq_enable (void)
	This function clears the IRQ disable bit in the status register. More...
MAYBE_INLINE void	irq_restore (unsigned state)
	This function restores the IRQ disable bit in the status register to the value contained within passed state. More...
MAYBE_INLINE int	irq_is_in (void)
	Check whether called from interrupt service routine. More...

Function Documentation

irq_disable()

MAYBE_INLINE unsigned irq_disable

(

void

)

This function sets the IRQ disable bit in the status register.

Returns

Previous value of status register. The return value should not be interpreted as a boolean value. The actual value is only significant for irq_restore().

See also

irq_restore

irq_enable()

MAYBE_INLINE unsigned irq_enable

(

void

)

This function clears the IRQ disable bit in the status register.

Returns

Previous value of status register. The return value should not be interpreted as a boolean value. The actual value is only significant for irq_restore().

See also

irq_restore

irq_is_in()

MAYBE_INLINE int irq_is_in

(

void

)

Check whether called from interrupt service routine.

Returns

true, if in interrupt service routine, false if not

irq_restore()

MAYBE_INLINE void irq_restore

(

unsigned

state

)

This function restores the IRQ disable bit in the status register to the value contained within passed state.

Parameters

[in]

state

state to restore

See also

irq_enable

irq_disable