File syn_exti.c¶

FileList > drivers > syn_exti.c

GPIO interrupt dispatcher implementation.

#include "../util/syn_assert.h"
#include "syn_exti.h"
#include <string.h>

Classes¶

Type	Name
struct	EXTI_Entry EXTI callback table entry.

Public Static Attributes¶

Type	Name
size_t	exti_count
EXTI_Entry	exti_table

Public Functions¶

Type	Name
size_t	syn_exti_count (void) Get the number of registered callbacks.
void	syn_exti_disable (SYN_GPIO_Pin pin) Disable interrupt for a pin.
void	syn_exti_enable (SYN_GPIO_Pin pin) Enable interrupt for a registered pin.
void	syn_exti_init (void)
void	syn_exti_irq_handler (SYN_GPIO_Pin pin) IRQ handler — call from platform ISR.
SYN_Status	syn_exti_register (SYN_GPIO_Pin pin, SYN_EXTI_Edge edge, SYN_EXTI_Callback cb, void * ctx) Register a callback for a pin interrupt.
void	syn_exti_unregister (SYN_GPIO_Pin pin) Unregister a pin callback.

Public Static Functions¶

Type	Name
EXTI_Entry *	find_entry (SYN_GPIO_Pin pin) Find the table entry for a given pin.

Public Static Attributes Documentation¶

variable exti_count¶

size_t exti_count;

Number of registered.

variable exti_table¶

EXTI_Entry exti_table[SYN_EXTI_MAX_PINS];

Registered callbacks.

Public Functions Documentation¶

function syn_exti_count¶

Get the number of registered callbacks.

size_t syn_exti_count (
    void
)

Returns:

Registration count.

function syn_exti_disable¶

Disable interrupt for a pin.

void syn_exti_disable (
    SYN_GPIO_Pin pin
)

Parameters:

pin GPIO pin.

function syn_exti_enable¶

Enable interrupt for a registered pin.

void syn_exti_enable (
    SYN_GPIO_Pin pin
)

Parameters:

pin GPIO pin.

function syn_exti_init¶

void syn_exti_init (
    void
)

Initialize the EXTI dispatcher.

function syn_exti_irq_handler¶

IRQ handler — call from platform ISR.

void syn_exti_irq_handler (
    SYN_GPIO_Pin pin
)

Looks up the registered callback for pin and invokes it. This is the glue between hardware ISR and the dispatcher.

Parameters:

pin GPIO pin that triggered the interrupt.

function syn_exti_register¶

Register a callback for a pin interrupt.

SYN_Status syn_exti_register (
    SYN_GPIO_Pin pin,
    SYN_EXTI_Edge edge,
    SYN_EXTI_Callback cb,
    void * ctx
)

Parameters:

pin GPIO pin.
edge Trigger edge.
cb Callback (runs in ISR context).
ctx User context passed to callback.

Returns:

SYN_OK, or SYN_ERROR if table full.

function syn_exti_unregister¶

Unregister a pin callback.

void syn_exti_unregister (
    SYN_GPIO_Pin pin
)

Parameters:

pin GPIO pin.

Public Static Functions Documentation¶

function find_entry¶

Find the table entry for a given pin.

static EXTI_Entry * find_entry (
    SYN_GPIO_Pin pin
)

Parameters:

pin GPIO pin.

Returns:

Pointer to entry, or NULL if not found.

The documentation for this class was generated from the following file src/syntropic/drivers/syn_exti.c