[MSP430] 蜂鸣器演唱音乐

修改自51单片机，launchpad的P10连接蜂鸣器，蜂鸣器演奏《八月桂花》

  1 #include "msp430g2553.h"

  2 

  3 unsigned char n=0;  //n为节拍常数变量    

  4 unsigned char  music_tab[] ={  

  5 0x18, 0x30, 0x1C , 0x10, //格式为: 频率常数, 节拍常数, 频率常数, 节拍常数,    

  6 0x20, 0x40, 0x1C , 0x10,   

  7 0x18, 0x10, 0x20 , 0x10,   

  8 0x1C, 0x10, 0x18 , 0x40,   

  9 0x1C, 0x20, 0x20 , 0x20,   

 10 0x1C, 0x20, 0x18 , 0x20,   

 11 0x20, 0x80, 0xFF , 0x20,

 12 0x30, 0x1C, 0x10 , 0x18,   

 13 0x20, 0x15, 0x20 , 0x1C,   

 14 0x20, 0x20, 0x20 , 0x26,   

 15 0x40, 0x20, 0x20 , 0x2B,   

 16 0x20, 0x26, 0x20 , 0x20,   

 17 0x20, 0x30, 0x80 , 0xFF,   

 18 0x20, 0x20, 0x1C , 0x10,   

 19 0x18, 0x10, 0x20 , 0x20,   

 20 0x26, 0x20, 0x2B , 0x20,   

 21 0x30, 0x20, 0x2B , 0x40,   

 22 0x20, 0x20, 0x1C , 0x10,   

 23 0x18, 0x10, 0x20 , 0x20,   

 24 0x26, 0x20, 0x2B , 0x20,   

 25 0x30, 0x20, 0x2B , 0x40,   

 26 0x20, 0x30, 0x1C , 0x10,   

 27 0x18, 0x20, 0x15 , 0x20,   

 28 0x1C, 0x20, 0x20 , 0x20,   

 29 0x26, 0x40, 0x20 , 0x20,   

 30 0x2B, 0x20, 0x26 , 0x20,   

 31 0x20, 0x20, 0x30 , 0x80,   

 32 0x20, 0x30, 0x1C , 0x10,   

 33 0x20, 0x10, 0x1C , 0x10,   

 34 0x20, 0x20, 0x26 , 0x20,   

 35 0x2B, 0x20, 0x30 , 0x20,   

 36 0x2B, 0x40, 0x20 , 0x15,   

 37 0x1F, 0x05, 0x20 , 0x10,   

 38 0x1C, 0x10, 0x20 , 0x20,   

 39 0x26, 0x20, 0x2B , 0x20,   

 40 0x30, 0x20, 0x2B , 0x40,   

 41 0x20, 0x30, 0x1C , 0x10,   

 42 0x18, 0x20, 0x15 , 0x20,   

 43 0x1C, 0x20, 0x20 , 0x20,   

 44 0x26, 0x40, 0x20 , 0x20,   

 45 0x2B, 0x20, 0x26 , 0x20,   

 46 0x20, 0x20, 0x30 , 0x30,   

 47 0x20, 0x30, 0x1C , 0x10,

 48 0x18, 0x40, 0x1C , 0x20,   

 49 0x20, 0x20, 0x26 , 0x40,   

 50 0x13, 0x60, 0x18 , 0x20,   

 51 0x15, 0x40, 0x13 , 0x40,   

 52 0x18, 0x80, 0x00   

 53 };   

 54    

 55 

 56 void delay (unsigned char m)   //控制频率延时    

 57 {   

 58  unsigned i=3*m;   

 59  while(--i);   

 60 }   

 61    

 62 void delaymms(unsigned int a)  //毫秒延时子程序    

 63 {   

 64   unsigned int t;

 65      while(--a)

 66         for(t=0;t<200;t++);

 67 }   

 68    

 69 void main(void)

 70 {

 71    unsigned char p,m;   //m为频率常数变量    

 72    unsigned char i=0;     

 73 

 74    WDTCTL = WDTPW + WDTHOLD;     // 停止看门狗

 75 

 76    P1DIR = 0Xff;        

 77    P2DIR = 0Xff;        

 78         

 79    CCTL0 |= CCIE;                             // CCR0 interrupt enabled

 80    CCR0 = 10000;                         //10ms

 81    TACTL = TASSEL_2 ;                  // SMCLK, contmode

 82    _EINT();

 83 

 84  

 85    while(1)   

 86       {   

 87          p=music_tab[i];   

 88           if(p==0x00)      

 89           { 

 90             i=0;

 91             delaymms(1000);

 92             continue;;

 93           }     //如果碰到结束符,延时1秒,回到开始再来一遍    

 94           else if(p==0xff)  

 95           { 

 96             i=i+1;

 97             delaymms(100);

 98             TACTL &=~MC_1;

 99             continue;

100           }  //若碰到休止符,延时100ms,继续取下一音符    

101           else         

102           {

103              m=music_tab[i++];

104              n=music_tab[i++];

105           }  //取频率常数 和 节拍常数    

106                  

107            TACTL |= MC_1+TACLR;                                           //开定时器   

108            while(n!=0) P1OUT ^= BIT0,delay(m);                         //等待节拍完成

109            TACTL &=~MC_1;                                           //关定时器     

110     }  

111    

112 }

113 

114 

115 // Timer A0 interrupt service routine

116 #pragma vector=TIMER0_A0_VECTOR

117 __interrupt void Timer_A (void)

118 {

119     n--;

120 }