External IRQ Interface

Interface for detecting external interrupts. More...

Data Structures
struct	external_irq_callback_args_t
struct	external_irq_cfg_t
struct	external_irq_api_t
struct	external_irq_instance_t

Macros
#define	EXTERNAL_IRQ_API_VERSION_MAJOR   (2U)
	EXTERNAL IRQ API version number (Major)
#define	EXTERNAL_IRQ_API_VERSION_MINOR   (0U)
	EXTERNAL IRQ API version number (Minor)

Typedefs
typedef void	external_irq_ctrl_t

Enumerations
enum	external_irq_trigger_t { EXTERNAL_IRQ_TRIG_FALLING = 0, EXTERNAL_IRQ_TRIG_RISING = 1, EXTERNAL_IRQ_TRIG_BOTH_EDGE = 2, EXTERNAL_IRQ_TRIG_LEVEL_LOW = 3 }
enum	external_irq_pclk_div_t { EXTERNAL_IRQ_PCLK_DIV_BY_1 = 0, EXTERNAL_IRQ_PCLK_DIV_BY_8 = 1, EXTERNAL_IRQ_PCLK_DIV_BY_32 = 2, EXTERNAL_IRQ_PCLK_DIV_BY_64 = 3 }

Detailed Description

Interface for detecting external interrupts.

Summary

The external IRQ interface supports external inputs, for example input from pins or capacitive touch buttons. When an input trigger is detected, a user provided callback function will be called.

Implemented by: ICU

Related interfaces: Key Matrix Interface

Related SSP architecture topics:

• SSP Interfaces
• SSP Predefined Layers
• Using SSP Modules

External IRQ Interface description: External IRQ Driver

Typedef Documentation

external_irq_ctrl_t

typedef void external_irq_ctrl_t

External IRQ control block. Allocate an instance specific control block to pass into the external IRQ API calls.

Implemented as

• icu_instance_ctrl_t

Enumeration Type Documentation

external_irq_pclk_div_t

enum external_irq_pclk_div_t

External IRQ input pin digital filtering sample clock divisor settings.

Enumerator
EXTERNAL_IRQ_PCLK_DIV_BY_1	Filter using PCLK divided by 1.
EXTERNAL_IRQ_PCLK_DIV_BY_8	Filter using PCLK divided by 8.
EXTERNAL_IRQ_PCLK_DIV_BY_32	Filter using PCLK divided by 32.
EXTERNAL_IRQ_PCLK_DIV_BY_64	Filter using PCLK divided by 64.

external_irq_trigger_t

enum external_irq_trigger_t

Trigger type: rising edge, falling edge, both edges, low level.

Enumerator
EXTERNAL_IRQ_TRIG_FALLING	Falling edge trigger.
EXTERNAL_IRQ_TRIG_RISING	Rising edge trigger.
EXTERNAL_IRQ_TRIG_BOTH_EDGE	Both edges trigger.
EXTERNAL_IRQ_TRIG_LEVEL_LOW	Low level trigger.