帮我写一段msp430f149蜂鸣器播放祝你平安歌的代码

下面是使用msp430f149驱动蜂鸣器播放“祝你平安”歌曲的代码：

#include <msp430f149.h>

// 祝你平安歌曲的音符频率，单位Hz
#define PING_AN_NOTE1 523
#define PING_AN_NOTE2 587
#define PING_AN_NOTE3 659
#define PING_AN_NOTE4 698
#define PING_AN_NOTE5 784
#define PING_AN_NOTE6 880

// 定义时长函数，单位ms
#define BEAT_DURATION 500
#define SHORT_BEAT (BEAT_DURATION / 2)
#define LONG_BEAT (BEAT_DURATION * 2)

// 蜂鸣器引脚设置
#define BUZZER_PIN BIT4
#define BUZZER_PORT P3OUT

// 蜂鸣器控制函数
void buzzerOn(int duration_ms) {
  BUZZER_PORT |= BUZZER_PIN;
  __delay_cycles(duration_ms * 1000);
  BUZZER_PORT &= ~BUZZER_PIN;
}

void playPingAnSong() {
  while (1) {
    buzzerOn(SHORT_BEAT);
    __delay_cycles(SHORT_BEAT * 200);

    buzzerOn(SHORT_BEAT);
    __delay_cycles(SHORT_BEAT * 200);

    buzzerOn(LONG_BEAT);
    __delay_cycles(LONG_BEAT * 200);

    buzzerOn(SHORT_BEAT);
    __delay_cycles(SHORT_BEAT * 200);

    buzzerOn(SHORT_BEAT);
    __delay_cycles(SHORT_BEAT * 400);

    buzzerOn(SHORT_BEAT);
    __delay_cycles(SHORT_BEAT * 200);

    buzzerOn(LONG_BEAT);
    __delay_cycles(LONG_BEAT * 200);

    buzzerOn(SHORT_BEAT);
    __delay_cycles(SHORT_BEAT * 800);

    buzzerOn(SHORT_BEAT);
    __delay_cycles(SHORT_BEAT * 200);

    buzzerOn(SHORT_BEAT);
    __delay_cycles(SHORT_BEAT * 200);

    buzzerOn(SHORT_BEAT);
    __delay_cycles(SHORT_BEAT * 200);

    buzzerOn(LONG_BEAT);
    __delay_cycles(LONG_BEAT * 200);

    buzzerOn(SHORT_BEAT);
    __delay_cycles(SHORT_BEAT * 200);

    buzzerOn(SHORT_BEAT);
    __delay_cycles(SHORT_BEAT * 800);

    buzzerOn(PING_AN_NOTE2);
    __delay_cycles(SHORT_BEAT * 500);

    buzzerOn(PING_AN_NOTE4);
    __delay_cycles(SHORT_BEAT * 200);

    buzzerOn(PING_AN_NOTE5);
    __delay_cycles(SHORT_BEAT * 300);

    buzzerOn(PING_AN_NOTE6);
    __delay_cycles(SHORT_BEAT * 500);

    buzzerOn(PING_AN_NOTE5);
    __delay_cycles(SHORT_BEAT * 200);

    buzzerOn(PING_AN_NOTE4);
    __delay_cycles(SHORT_BEAT * 300);

    buzzerOn(PING_AN_NOTE3);
    __delay_cycles(SHORT_BEAT * 500);

    buzzerOn(PING_AN_NOTE1);
    __delay_cycles(SHORT_BEAT * 200);

    buzzerOn(PING_AN_NOTE2);
    __delay_cycles(SHORT_BEAT * 300);

    buzzerOn(PING_AN_NOTE3);
    __delay_cycles(SHORT_BEAT * 500);

    buzzerOn(PING_AN_NOTE2);
    __delay_cycles(SHORT_BEAT * 200);

    buzzerOn(PING_AN_NOTE1);
    __delay_cycles(SHORT_BEAT * 300);

    buzzerOn(PING_AN_NOTE1);
    __delay_cycles(LONG_BEAT * 5000);
  }
}

void main() {
  WDTCTL = WDTPW + WDTHOLD; // 停用看门狗
  P3DIR |= BUZZER_PIN;      // 将蜂鸣器引脚设为输出

  playPingAnSong();         // 播放祝你平安歌曲
}

这段代码中，使用时长函数来控制播放歌曲中的不同音符的时长，蜂鸣器控制函数则播放具体的音符，并且等待指定时长之后再停止发声。使用while (1) 循环让歌曲可以无限循环播放，直到设备被关闭。