#include "buzzer.h"

#include "timer.h"

#define OFF 0
#define ON 1
#define ONCE 2

static uint8_t state;
static uint8_t loop_times;
static uint16_t loop_interval;
static uint16_t beep_time;

inline void BUZZER_Start()
{
    state = ON;
    HAL_GPIO_WritePin(FM_K2_POWERC_GPIO_Port, FM_K2_POWERC_Pin, GPIO_PIN_RESET);
}

inline void BUZZER_Stop()
{
    HAL_GPIO_WritePin(FM_K2_POWERC_GPIO_Port, FM_K2_POWERC_Pin, GPIO_PIN_SET);
    if (state == ONCE)
        TIMER_DelLoopEvent(EVENT_BUZZER);
    state = OFF;
}

/// @brief 启动蜂鸣器鸣叫
/// @param time 鸣叫时间，单位1毫秒
void BUZZER_StartTimed(uint16_t time)
{
    state = ONCE;
    BUZZER_Start();
    TIMER_AddLoopEvent(EVENT_BUZZER, BUZZER_Stop, time);
}

void BUZZER_Callback();

void BUZZER_StartNTimes(uint8_t loop, uint16_t interval, uint16_t time)
{
    loop_times = loop;
    loop_interval = interval;
    beep_time = time;
    BUZZER_Start();
    TIMER_AddLoopEvent(EVENT_BUZZER, BUZZER_Callback, time);
}

void BUZZER_Callback()
{
    switch (state)
    {
    case ON:
        BUZZER_Stop();
        if (--loop_times)
            TIMER_AddLoopEvent(EVENT_BUZZER, BUZZER_Callback, loop_interval);
        else
            TIMER_DelLoopEvent(EVENT_BUZZER);
        break;
    case OFF:
        BUZZER_Start();
        TIMER_AddLoopEvent(EVENT_BUZZER, BUZZER_Callback, beep_time);
        break;
    }
}