[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 }
posted @ 2012-09-01 12:20  sky1991  阅读(4801)  评论(3)  编辑  收藏  举报