miketsai
286291fcfd
New buzzer.h/buzzer.c: background pthread drives gpio64 with three patterns (GRASS 500/500ms, ALERT 300/200ms, COLLISION 100/100ms). Integrated into fire_collision_warning(), fire_alert(), and grass state machine in event_recorder.c; buzzer_init() called after can_bus_init() in kp_firmware.c. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
24 lines
678 B
C
24 lines
678 B
C
/*
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* buzzer.h — GPIO-driven buzzer control (gpio64)
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*
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* Background thread plays a continuous pattern until changed.
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* Pattern priority (highest wins): COLLISION > ALERT > GRASS > OFF
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* Callers set the desired pattern; the module handles GPIO toggling.
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*/
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#ifndef BUZZER_H
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#define BUZZER_H
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typedef enum {
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BUZZER_PATTERN_OFF = 0,
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BUZZER_PATTERN_GRASS = 1, /* 500ms on / 500ms off */
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BUZZER_PATTERN_ALERT = 2, /* 300ms on / 200ms off */
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BUZZER_PATTERN_COLLISION = 3, /* 100ms on / 100ms off */
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} buzzer_pattern_t;
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int buzzer_init(void);
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void buzzer_set_pattern(buzzer_pattern_t pattern);
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void buzzer_close(void);
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#endif /* BUZZER_H */
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