豆皮 - STM32开发板基础教程（五） - 豆皮会唱歌（原创）

豆皮 - STM32开发板基础教程（五） - 我的豆皮会唱歌（原创）

http://www.stmfans.com/bbs/viewthread.php?tid=1102&page=1&extra=page%3D1

呵呵不是播放MP3啦（顺便说一下豆皮播放MP3 bozai已经做出来了哦呵呵）
是利用豆皮STM32开发板上的蜂鸣器播放不同音符不同的pwm频率加到蜂鸣器上能产生不一样的音符
呵呵原理到是简单但是蜂鸣器真的不好调音符也不好确定我花了好长的时间才确定的频率把实验室的人都吵疯了一个个都对我有意见啊因为我在不停的用蜂鸣器发出“鬼叫的声音”  娃哈哈哈基本上可以用了
还将就听着  呵呵附上一个音符表大家也可以自己去尝试别的频率呵呵

本教程的主角是：STM32 PWM 蜂鸣器

各音的频率大家可以参考着修改频率这样就可以发出悦耳的声音了呵呵

初始化pwm输出豆皮借的是TIM4的channnel4  呵呵
/*******************************************************************************
* Function Name  : Change_for_Note
* Description : 修改pwm频率
* Input       : u16类型的频率值
* Output       : None
* Return       : None
*******************************************************************************/
void Change_for_Note(u16 NoteSet)
{

  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
  TIM_OCInitTypeDef  TIM_OCInitStructure;

  /* Time base configuration */
  TIM_TimeBaseStructure.TIM_Period = NoteSet;
  TIM_TimeBaseStructure.TIM_Prescaler = 0;
  TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV4;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);

  /* PWM1 Mode configuration: Channel4 */
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = NoteSet/2;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High ;
  TIM_OC4Init(TIM4, &TIM_OCInitStructure);
}

/* 取得音高和节拍奏一个音符 */
void Sing_A_Note(int music,int mytime)
{

int i;
Change_for_Note(music);
for(i=0;i<mytime;i++)
Delay_Ms(50);
//nosound();
}

  呵呵这个频率是我算了半天算出来的应该还算准的呵呵用在蜂鸣器上娃哈哈哈

/* 定义节拍 */
#define _HALF 5
#define HALF 10
#define THREE_HALF 15
#define ONE 20
#define ONE_HALF 30
#define TWO 40
#define TWO_HALF 50

/* 定义音高 */
#define low_1 55042
#define low_2 49037
#define low_3 43687
#define low_4 41235
#define low_5 36735
#define low_6 32728
#define low_7 29157
#define mid_1 27520
#define mid_2 24519
#define mid_3 21843
#define mid_4 20617
#define mid_5 18368
#define mid_6 16364
#define mid_7 14579
#define high_1 13761
#define high_2 12259
#define high_3 10922
#define high_4 10309
#define high_5 9184
#define high_6 8182
#define high_7 7246

呵呵歌曲音符和节拍数组这个数组是我读大二的时候写的一个PC机程序上面的当时写的程序是调用主板BIOS的sound（）函数用电脑主板上的小喇叭播放歌曲呵呵附件里我也贴上来了大家可以下载了在电脑上听 MIDI的声音哦呵呵

// 播放一个歌曲
void Sing_A_Song(void)
{
  /*  数组里数据为音高和节拍累啊 */
u16 my_music[]={
low_5,HALF,mid_2,HALF,mid_1,HALF,mid_1,HALF,mid_3,ONE_HALF,/**/
low_5,HALF,mid_1,HALF,low_7,HALF,mid_1,HALF,mid_3,ONE_HALF,
mid_3,ONE,/**/mid_1,_HALF,low_7,_HALF,low_6,HALF,mid_1,HALF,
mid_1,HALF,low_6,_HALF,mid_4,_HALF,mid_4,HALF,mid_3,HALF,mid_3,ONE_HALF,
mid_1,_HALF,mid_5,HALF,mid_4,HALF,mid_3,_HALF,mid_2,_HALF,
mid_2,ONE_HALF,/**/mid_6,_HALF,mid_3,HALF,low_6,HALF,low_6,HALF,
low_5,HALF,low_6,HALF,mid_3,ONE,mid_1,_HALF,low_7,_HALF,
mid_1,HALF,low_7,HALF,mid_1,HALF,mid_5,ONE,mid_1,HALF,mid_1,HALF,
mid_1,_HALF,mid_1,_HALF,mid_5,HALF,mid_6,_HALF,mid_5,_HALF,
mid_5,HALF,mid_1,HALF,mid_5,HALF,mid_4,ONE,mid_3,_HALF,
mid_1,_HALF,mid_1,_HALF,low_5,_HALF,low_5,HALF,low_5,ONE,/**/
mid_1,HALF,mid_5,HALF,mid_6,HALF,mid_6,HALF,mid_1,HALF,
mid_3,ONE,low_5,HALF,low_6,HALF,mid_1,HALF,mid_2,_HALF,
mid_1,_HALF,mid_1,_HALF,mid_3,_HALF,mid_3,TWO,/**/mid_3,ONE_HALF,
mid_1,_HALF,high_1,HALF,mid_7,_HALF,mid_7,_HALF,mid_7,HALF,
mid_6,HALF,mid_6,_HALF,mid_7,_HALF,mid_6,HALF,mid_3,_HALF,
mid_2,_HALF,mid_1,HALF,mid_2,HALF,mid_2,HALF,mid_1,_HALF,
mid_5,_HALF,mid_5,HALF,mid_2,ONE,/**/mid_3,_HALF,mid_2,_HALF,
mid_3,HALF,mid_6,HALF,mid_6,_HALF,high_1,_HALF,mid_6,HALF,
mid_6,ONE_HALF,/**/mid_5,HALF,mid_6,HALF,mid_5,HALF,mid_5,HALF,
mid_5,_HALF,mid_3,_HALF,mid_2,_HALF,mid_1,THREE_HALF,mid_1,HALF,
low_6,_HALF,mid_1,_HALF,mid_2,HALF,mid_3,_HALF,low_6,_HALF,
low_6,HALF,low_6,_HALF,mid_1,_HALF,mid_2,ONE_HALF,low_5,_HALF,
low_5,_HALF,mid_5,_HALF,mid_6,_HALF,mid_5,HALF,mid_5,HALF,
mid_6,HALF,mid_2,HALF,mid_2,ONE_HALF,/*repare*/mid_3,_HALF,mid_5,_HALF,
mid_5,HALF,mid_3,_HALF,mid_3,_HALF,mid_3,HALF,mid_2,HALF,
mid_1,_HALF,mid_2,_HALF,mid_1,HALF,mid_3,_HALF,mid_6,_HALF,
mid_6,HALF,mid_3,HALF,mid_5,ONE_HALF,mid_3,HALF,mid_6,HALF,
mid_7,_HALF,mid_6,_HALF,mid_6,THREE_HALF,mid_3,_HALF,mid_6,HALF,
mid_7,HALF,mid_6,HALF,mid_6,HALF,mid_3,HALF,mid_2,HALF,mid_1,HALF,
low_6,HALF,mid_2,HALF,mid_2,ONE,mid_2,_HALF,mid_3,_HALF,low_6,HALF,
mid_1,_HALF,low_6,_HALF,mid_1,HALF,mid_1,_HALF,low_6,_HALF,
mid_2,HALF,mid_3,ONE,mid_1,_HALF,low_7,_HALF,mid_1,HALF,mid_5,HALF,
mid_5,HALF,mid_6,_HALF,mid_2,_HALF,mid_2,HALF,mid_3,HALF,mid_3,HALF,
mid_1,_HALF,low_7,_HALF,low_6,HALF,mid_2,HALF,mid_2,HALF,mid_2,_HALF,
mid_1,_HALF,mid_2,_HALF,mid_3,HALF,mid_2,_HALF,mid_2,HALF,
mid_1,HALF,mid_1,HALF,mid_2,ONE_HALF,mid_2,TWO,/**/mid_3,_HALF,mid_5,_HALF,
mid_5,HALF,mid_3,_HALF,mid_3,_HALF,mid_3,HALF,mid_2,HALF,
mid_1,_HALF,mid_2,_HALF,mid_1,HALF,mid_3,_HALF,mid_6,_HALF,
mid_6,HALF,mid_3,HALF,mid_5,ONE_HALF,mid_3,HALF,mid_6,HALF,
mid_7,_HALF,mid_6,_HALF,mid_6,THREE_HALF,mid_3,_HALF,mid_6,HALF,
mid_7,HALF,mid_6,HALF,mid_6,HALF,mid_3,HALF,mid_2,HALF,mid_1,HALF,
low_6,HALF,mid_2,HALF,mid_2,ONE,mid_2,_HALF,mid_3,_HALF,low_6,HALF,
mid_1,_HALF,low_6,_HALF,mid_1,HALF,mid_1,_HALF,low_6,_HALF,
mid_2,HALF,mid_3,ONE,mid_1,_HALF,low_7,_HALF,mid_5,HALF,
mid_5,HALF,mid_5,HALF,mid_6,_HALF,mid_2,_HALF,mid_2,HALF,
mid_1,HALF,low_6,_HALF,mid_3,_HALF,mid_2,ONE_HALF,mid_2,_HALF,
mid_1,_HALF,mid_2,_HALF,mid_3,_HALF,mid_2,HALF,mid_2,HALF,
mid_1,_HALF,mid_2,_HALF,mid_1,HALF,mid_1,ONE_HALF,mid_1,ONE,1
};

u16 i=0;

while( my_music != 1 )
{
   Sing_A_Note(my_music,my_music[i+1]);
   i=i+2;
}
}

感觉在电脑上听的效果要好很多不知道是不是蜂鸣器的质量问题还是我的频率没有选好呵呵先这样咯有时间再来折腾

完整工程在附件里

敬请继续关注豆皮的的教程会逐步推出