#ifndef PWM_H
#define PWM_H

/* Includes ----------------------------------------------------------------- */
#include <stdint.h>
#include "bsp\bsp.h"

/* Exported constants ------------------------------------------------------- */
/* Exported macro ----------------------------------------------------------- */
/* Exported types ----------------------------------------------------------- */

/* PWM通道 */
typedef enum {
  BSP_PWM_IMU_HEAT,
	BSP_PWM_BUZZER,
} BSP_PWM_Channel_t;

typedef enum {
    BUZZER_OFF,       // 蜂鸣器关闭
    BUZZER_SINGLE,    // 单次鸣叫(滴)
    BUZZER_DOUBLE,    // 双次鸣叫(滴-滴)
    BUZZER_TRIPLE,    // 三次鸣叫(滴-滴-滴)
    BUZZER_CONTINUOUS,// 持续鸣叫(滴————)
    BUZZER_BEEPING    // 间歇鸣叫(滴...滴...滴...)
} BuzzerMode;

typedef enum {
    STATE_IDLE,  // 空闲状态(未激活)
    STATE_ON,    // 鸣叫状态(PWM输出中)
    STATE_OFF    // 静音间隔状态(等待下次鸣叫)
} BuzzerState;

static struct {
    BuzzerState state;  // 当前状态
    BuzzerMode mode;    // 当前模式
    uint32_t timer;     // 时间记录器
    uint8_t count;      // 鸣叫次数计数器
    float duty;         // PWM占空比(0.0-1.0)
	  uint16_t on_time;   // 鸣叫持续时间(ms)
    uint16_t off_time;  // 静音间隔时间(ms)
} buzzer;

/* Exported functions prototypes -------------------------------------------- */
int8_t BSP_PWM_Start(BSP_PWM_Channel_t ch);
int8_t BSP_PWM_Set(BSP_PWM_Channel_t ch, float duty_cycle);
int8_t BSP_PWM_Stop(BSP_PWM_Channel_t ch);

void Buzzer_Init(void);
void Buzzer_Update(BuzzerMode mode, float duty_cycle, uint16_t on_time_ms, uint16_t off_time_ms);
#endif