app_link.h

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#ifndef APP_LINK_H
#define APP_LINK_H
 
#include <stdint.h>
 
#define APPL_CMD_MAX      20u
#define APPL_QUEUE_LEN    16u      
typedef struct {
    uint8_t len;
    uint8_t b[APPL_CMD_MAX];
} appl_cmd_t;
 
typedef struct {
    int16_t thr, yaw, pitch, roll;   
    uint8_t buttons;
} appl_rc_t;
 
void     appl_reset(void);
 
/* ---- BLE context (one producer) ---- */
void     appl_on_cmd_write(const uint8_t *data, uint16_t len, uint32_t now_ms);
void     appl_on_connect(void);
void     appl_on_disconnect(void);
 
/* ---- AppTask (one consumer) ---- */
int      appl_pop(appl_cmd_t *out);            
uint32_t appl_queue_dropped(void);
 
/* ---- flight core (any reader, never blocks) ---- */
uint8_t  appl_ever(void);                      
uint32_t appl_last_ms(void);                   
uint8_t  appl_link_down(void);                 
uint32_t appl_silence_ms(uint32_t now_ms, uint32_t down_floor_ms);
int      appl_rc_read(appl_rc_t *out, uint32_t *t_ms);
 
#endif /* APP_LINK_H */