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/******************************************************************************
文 件 名：Buzzer.c
功能描述：蜂鸣器驱动库文件
作 者：张暄
版 本：V1.0
日 期：2016.5.18
******************************************************************************/
#include "Buzzer.h"
#include "TimerB.h"
#include "Sound_Tracks.h"
#define BUZZER_PWM_CHANNEL TIMERB_0_CH11
BuzzerPlayCtrlStruct BuzzerPlayCtrl;
/******************************************************************************
函数名：Buzzer_Start_Up
功 能：启动并初始化蜂鸣器
蜂鸣器PWM使用CLKSA/CLKSB时钟源,推荐的时钟源频率为50kHz~100kHz
参 数：无
返回值：无
******************************************************************************/
void Buzzer_Start_Up(void)
{
BuzzerPlayCtrl.Mode = BUZZER_MODE_IDLE;
BuzzerPlayCtrl.Track = 0;
BuzzerPlayCtrl.Note = 0;
BuzzerPlayCtrl.Timer = 0;
BuzzerPlayCtrl.Fade = 0;
BUZZER_CTRL = 0;
TimerB_PWM_Channel_Stop(BUZZER_PWM_CHANNEL);
TimerB_PWM_Channel_Init(BUZZER_PWM_CHANNEL, TIMERB_CLOCK_0, TIMERB_HIGH);
}
/******************************************************************************
函数名：Buzzer_Shutdown
功 能：关闭蜂鸣器
参 数：无
返回值：无
******************************************************************************/
void Buzzer_Shutdown(void)
{
BuzzerPlayCtrl.Mode = BUZZER_MODE_IDLE;
BuzzerPlayCtrl.Track = 0;
BuzzerPlayCtrl.Note = 0;
BuzzerPlayCtrl.Timer = 0;
BuzzerPlayCtrl.Fade = 0;
BUZZER_CTRL = 0;
TimerB_PWM_Channel_Stop(BUZZER_PWM_CHANNEL);
}
/******************************************************************************
函数名：Buzzer_Play_Track
功 能：单次播放指定音轨
参 数：TrackID - 音轨编号
返回值：无
******************************************************************************/
void Buzzer_Play_Track(uint8_t TrackID)
{
if (BuzzerPlayCtrl.Mode)
return;
if (TrackID >= SND_TRACK_TOTAL_NUM)
return;
BUZZER_CTRL = 1;
BuzzerPlayCtrl.Track = TrackID;
BuzzerPlayCtrl.Note = 0;
BuzzerPlayCtrl.Timer = (uint16_t)SndTracks[TrackID].PreCharge * 20;
BuzzerPlayCtrl.Fade = 0;
BuzzerPlayCtrl.Mode = BUZZER_MODE_SINGLE;
}
/******************************************************************************
函数名：Buzzer_Play_Track
功 能：循环播放指定音轨
参 数：TrackID - 音轨编号
返回值：无
******************************************************************************/
void Buzzer_Repeat_Play_Track(uint8_t TrackID)
{
if (BuzzerPlayCtrl.Mode)
return;
if (TrackID >= SND_TRACK_TOTAL_NUM)
return;
BUZZER_CTRL = 1;
BuzzerPlayCtrl.Track = TrackID;
BuzzerPlayCtrl.Note = 0;
BuzzerPlayCtrl.Timer = (uint16_t)SndTracks[TrackID].PreCharge * 20;
BuzzerPlayCtrl.Fade = 0;
BuzzerPlayCtrl.Mode = BUZZER_MODE_LOOP;
}
/******************************************************************************
函数名：Buzzer_Stop_Play
功 能：停止播放音轨
参 数：无
返回值：无
******************************************************************************/
void Buzzer_Stop_Play(void)
{
BuzzerPlayCtrl.Mode = BUZZER_MODE_IDLE;
BuzzerPlayCtrl.Track = 0;
BuzzerPlayCtrl.Note = 0;
BuzzerPlayCtrl.Timer = 0;
BuzzerPlayCtrl.Fade = 0;
BUZZER_CTRL = 0;
TimerB_PWM_Channel_Stop(BUZZER_PWM_CHANNEL);
}
/******************************************************************************
函数名：Buzzer_Play_ISR
功 能：蜂鸣器播放中断服务函数
参 数：无
返回值：无
******************************************************************************
注 意：该服务函数必须嵌入到50us定时中断内
******************************************************************************/
void Buzzer_Play_ISR(void)
{
if (BuzzerPlayCtrl.Mode)
{
if (BuzzerPlayCtrl.Timer)
{
BuzzerPlayCtrl.Timer--;
}
if (BuzzerPlayCtrl.Timer == 0)
{
if (BuzzerPlayCtrl.Note < SndTracks[BuzzerPlayCtrl.Track].NoteNum)
{
BUZZER_CTRL = 1;
if (SndTracks[BuzzerPlayCtrl.Track].Note[BuzzerPlayCtrl.Note].Freq)
{
TimerB_PWM_Channel_Fre_Set(BUZZER_PWM_CHANNEL, SndTracks[BuzzerPlayCtrl.Track].Note[BuzzerPlayCtrl.Note].Freq, SndTracks[BuzzerPlayCtrl.Track].Note[BuzzerPlayCtrl.Note].Duty);
// TimerB_PWM_Channel_Duty_Set(BUZZER_PWM_CHANNEL, SndTracks[BuzzerPlayCtrl.Track].Note[BuzzerPlayCtrl.Note].Duty);
TimerB_PWM_Channel_Start(BUZZER_PWM_CHANNEL);
}
else
{
TimerB_PWM_Channel_Stop(BUZZER_PWM_CHANNEL);
}
BuzzerPlayCtrl.Timer = SndTracks[BuzzerPlayCtrl.Track].Note[BuzzerPlayCtrl.Note].Interval * 20;
BuzzerPlayCtrl.Fade = SndTracks[BuzzerPlayCtrl.Track].Note[BuzzerPlayCtrl.Note].Fade * 20;
BuzzerPlayCtrl.Note++;
}
else
{
if (BuzzerPlayCtrl.Mode == BUZZER_MODE_LOOP)
{
BuzzerPlayCtrl.Note = 0;
}
else
{
BUZZER_CTRL = 0;
TimerB_PWM_Channel_Stop(BUZZER_PWM_CHANNEL);
BuzzerPlayCtrl.Mode = BUZZER_MODE_IDLE;
}
}
}
else if (BuzzerPlayCtrl.Timer < BuzzerPlayCtrl.Fade)
BUZZER_CTRL = 0;
}
}