STM32 单片机控制无源蜂鸣器唱歌 欢乐颂

参考：http://www.tuicool.com/articles/EFfYny2
我基本就是按照以上这个连接里面的来的。其中的define的值就是这些音的频率。
定义各个变量：

#define D0 -1
#define D1 262//频率
#define D2 293
#define D3 329
#define D4 349
#define D5 392
#define D6 440
#define D7 494

#define M1 523
#define M2 586
#define M3 658
#define M4 697
#define M5 783
#define M6 879
#define M7 987

#define H1 1045
#define H2 1171
#define H3 1316
#define H4 1393
#define H5 1563
#define H6 1755
#define H7 1971

uint16_t tune_durt[98][2] = {//曲子{频率，节拍}
{M3,8},{M3,8},{M4,8},{M5,8},
{M5,8},{M4,8},{M3,8},{M2,8},
{M1,8},{M1,8},{M2,8},{M3,8},
{M3,12},{M2,4},{M2,16},

{M3,8},{M3,8},{M4,8},{M5,8},
{M5,8},{M4,8},{M3,8},{M2,8},
{M1,8},{M1,8},{M2,8},{M3,8},
{M2,12},{M1,4},{M1,16},

{M2,8},{M2,8},{M3,8},{M1,8},
{M2,8},{M3,4},{M4,4},{M3,8},{M1,8},
{M2,8},{M3,4},{M4,4},{M3,8},{M2,8},
{M1,8},{M2,8},{D5,8},{M3,8},

{M3,8},{M3,8},{M4,8},{M5,8},
{M5,8},{M4,8},{M3,8},{M4,4},{M2,4},
{M1,8},{M1,8},{M2,8},{M3,8},
{M2,12},{M1,4},{M1,16},

{M2,8},{M2,8},{M3,8},{M1,8},
{M2,8},{M3,4},{M4,4},{M3,8},{M1,8},
{M2,8},{M3,4},{M4,4},{M3,8},{M2,8},
{M1,8},{M2,8},{D5,8},{M3,8},

{M3,8},{M3,8},{M4,8},{M5,8},
{M5,8},{M4,8},{M3,8},{M4,4},{M2,4},
{M1,8},{M1,8},{M2,8},{M3,8},
{M2,12},{M1,4},{M1,16}

};
uint16_t length_of_whole_music=98;
uint16_t music_tune=0,music_last_tune=0,music_durt_length,durt_count=0;
uint16_t where_is_singing=0;
uint16_t length_of_music_meter=2;//the time of one meter in music
uint16_t music_gap_count=0;
uint16_t music_gap_length=3;

进行控制变量的操作

music_last_tune=music_tune;

                if(durt_count>=music_durt_length)
                {
                    if(music_durt_length<5)//if this tune is very short, no music_gap.
                    {
                    music_gap_count=music_gap_length;
                    }
                    music_gap_count++;
                    if(music_gap_count>=music_gap_length)//music gap£ºthe gap between two meters
                    {
                        music_gap_count=0;

                      where_is_singing++;
                      if(where_is_singing>=length_of_whole_music)
                      {
                        where_is_singing=0;
                      }

                      durt_count=0;
                      music_durt_length=tune_durt[where_is_singing][1]*length_of_music_meter;
                      music_tune=tune_durt[where_is_singing][0];
                  }
                }

                durt_count++;

利用控制变量对单片机底层进行操作：

           if(music_gap_count>0)
            {
                PWM_Rate_Set ( 0, &htim1, TIM_CHANNEL_1);//no sound in gap（设置占空比）
            }   
            else
           {            
              PWM_Rate_Set ( 50, &htim1, TIM_CHANNEL_1);
            }

            if(music_last_tune!=music_tune)//change tune
            {
                PWM_Set( music_tune, htim1, TIM_CHANNEL_1);//（初始化频率）
                HAL_TIM_PWM_Start(&htim1,TIM_CHANNEL_1);
                HAL_TIM_PWM_Start(&htim1,TIM_CHANNEL_2);
            }

最后当然是成功啦~~