/*
 * MTG RFID Companion - Piezo buzzer driver (LEDC PWM)
 *
 * Phase 7 Step 7.4: Subtle audio cues on GPIO 14.
 */

#pragma once

#include "esp_err.h"

#ifdef __cplusplus
extern "C" {
#endif

/**
 * @brief Initialize LEDC PWM channel for the buzzer.
 */
esp_err_t buzzer_init(void);

/**
 * @brief Start a tone at the given frequency.
 */
esp_err_t buzzer_start(uint32_t freq_hz, uint32_t duty_percent);

/**
 * @brief Silence the buzzer.
 */
esp_err_t buzzer_stop(void);

/**
 * @brief Play a short chirp (blocking).
 * @param freq_hz Tone frequency
 * @param duration_ms Tone length in ms
 */
esp_err_t buzzer_chirp(uint32_t freq_hz, uint32_t duration_ms);

#ifdef __cplusplus
}
#endif