link_dev.h

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#ifndef RCBENCH_LINK_DEV_H
#define RCBENCH_LINK_DEV_H
 
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
 
#include "link_msg.h"
#include "link_pages.h"
 
#ifdef __cplusplus
extern "C" {
#endif

#define LINK_DEV_SILENCE_MS 200u

typedef struct {
    uint8_t page;
    uint8_t count;    
    void  (*read)(void *ctx, uint8_t offset, uint8_t count, uint16_t *out);
    uint8_t (*write)(void *ctx, uint8_t offset, uint8_t count,
                     const uint16_t *in);
} link_page_t;

typedef struct {
    const link_page_t *pages;
    uint8_t            page_count;
    void              *ctx;
 
    uint32_t last_request_ms;
    bool     heard;
    bool     silent;      
    bool     failsafe;    
    bool     arm_latched;
    uint32_t requests;
} link_dev_t;

void link_dev_init(link_dev_t *d, const link_page_t *pages, uint8_t page_count,
                   void *ctx, uint32_t now_ms);

bool link_dev_dispatch(link_dev_t *d, const link_msg_t *req,
                       link_msg_t *reply, uint32_t now_ms);

bool link_dev_apply(const link_dev_t *d, const link_msg_t *req,
                    link_msg_t *reply);
 

bool link_dev_tick(link_dev_t *d, uint32_t now_ms);

void link_dev_clear_failsafe(link_dev_t *d, uint32_t now_ms);

void link_dev_latch_arm(link_dev_t *d);

bool link_dev_arm_latched(const link_dev_t *d);
 
#ifdef __cplusplus
}
#endif
 
#endif /* RCBENCH_LINK_DEV_H */