/*
 * buzzer.h — GPIO-driven buzzer control (gpio64)
 *
 * Background thread plays a continuous pattern until changed.
 * Pattern priority (highest wins): COLLISION > ALERT > GRASS > OFF
 * Callers set the desired pattern; the module handles GPIO toggling.
 */

#ifndef BUZZER_H
#define BUZZER_H

typedef enum {
    BUZZER_PATTERN_OFF       = 0,
    BUZZER_PATTERN_GRASS     = 1,  /* 500ms on / 500ms off */
    BUZZER_PATTERN_ALERT     = 2,  /* 300ms on / 200ms off */
    BUZZER_PATTERN_COLLISION = 3,  /* 100ms on / 100ms off */
} buzzer_pattern_t;

int  buzzer_init(void);
void buzzer_set_pattern(buzzer_pattern_t pattern);
void buzzer_close(void);

#endif /* BUZZER_H */