exti.h

Go to the documentation of this file.

#ifndef NEXUS_EXTI_H
#define NEXUS_EXTI_H
 
#include "nexus/core/time.h"
#include "nexus/io/wake.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef struct nx_exti_port nx_exti_port_t;
typedef enum {
    NX_EXTI_RISING = 1,
    NX_EXTI_FALLING = 2,
    NX_EXTI_BOTH = 3
} nx_exti_edge_t;
#define NX_EXTI_EVENT_LOSS      1u
#define NX_EXTI_EVENT_COALESCED 2u
typedef struct {
    nx_time_us_t timestamp_us;
    uint32_t flags;
    uint8_t line;
    nx_exti_edge_t edge;
} nx_exti_event_t;

typedef struct {
    nx_result_t (*read)(void* context, nx_exti_event_t* events, size_t capacity,
                        size_t* count);
    nx_result_t (*stop)(void* context);
    nx_result_t (*attach_wake)(void* context, const nx_irq_wake_t* wake,
                               uint8_t syscall_ceiling);
} nx_exti_ops_t;

struct nx_exti_port {
    const nx_exti_ops_t* ops;
    void* context;
};

nx_result_t nx_exti_port_read(const nx_exti_port_t* port,
                              nx_exti_event_t* events, size_t capacity,
                              size_t* count);
nx_result_t nx_exti_port_stop(const nx_exti_port_t* port);
nx_result_t nx_exti_port_attach_wake(const nx_exti_port_t* port,
                                     const nx_irq_wake_t* wake,
                                     uint8_t syscall_ceiling);
#ifdef __cplusplus
}
#endif
 
#endif