INTC Software Driver API for AVR UC3

This is a software module to register interrupt handlers at any specified interrupt level to any interrupt line managed by the INTC module in AVR UC3 devices.

Macros
#define	AVR32_INTC_MAX_NUM_IRQS_PER_GRP   32
	Maximal number of interrupt request lines per group. More...
#define	AVR32_INTC_NUM_INT_LEVELS   (1 << AVR32_INTC_IPR_INTLEVEL_SIZE)
	Number of interrupt priority levels. More...

Functions
void	INTC_init_interrupts (void)
	Initializes the hardware interrupt controller driver. More...
void	INTC_register_interrupt (__int_handler handler, uint32_t irq, uint32_t int_level)
	Registers an interrupt handler. More...

#define AVR32_INTC_MAX_NUM_IRQS_PER_GRP   32

Maximal number of interrupt request lines per group.

Referenced by INTC_register_interrupt().

#define AVR32_INTC_NUM_INT_LEVELS   (1 << AVR32_INTC_IPR_INTLEVEL_SIZE)

Number of interrupt priority levels.

void INTC_init_interrupts

(

void

)

Initializes the hardware interrupt controller driver.

References _int_handler_table, _unhandled_interrupt(), INTC_init_evba(), and IPR_INT0.

void INTC_register_interrupt	(	__int_handler	handler,
		uint32_t	irq,
		uint32_t	int_level
	)

Registers an interrupt handler.

Parameters

handler	Interrupt handler to register.
irq	IRQ of the interrupt handler to register.
int_level	Interrupt priority level to assign to the group of this IRQ.

Warning

The interrupt handler must manage the `rete' instruction, which can be done using pure assembly, inline assembly or the `__attribute__((interrupt))' C function attribute.

If several interrupt handlers of a same group are registered with different priority levels, only the latest priority level set will be effective.

References _int_handler_table, AVR32_INTC_MAX_NUM_IRQS_PER_GRP, IPR_INT0, IPR_INT1, IPR_INT2, and IPR_INT3.

Referenced by aic23b_codec_start(), and pwm_dac_start().