xiaopingguo.rar_S3C2440 蜂鸣器

#include "timer.h" unsigned short songfreq[][8]={ //低 {0, 262, 294, 330, 349, 392, 440, 494 },//0 {0, 277, 311, 330, 370, 415, 466, 494 },//1 //中 {0, 523, 578, 659, 698, 784, 880, 988 },//2 {0, 554, 622, 659, 740, 831, 932, 988 },//3 //高 {0, 1046, 1175, 1318, 1397, 1568, 1760, 1976},//4 {0, 1109, 1245, 1318, 1480, 1661, 1865, 1976} //5 }; struct songdata { int tone; //音调 int freq; // 音色 int time; // 该音的长短 }; struct songdata xiaopg[] = { {5,3,40},{5,1,40},{5,2,40},{2,6,40}, {5,3,20},{5,2,20},{5,1,20},{5,2,20},{2,6,80}, {5,3,40},{5,1,40},{5,2,40},{5,2,40}, {5,5,20},{5,3,20},{2,7,40},{5,1,40},{5,1,20},{2,7,20}, {2,6,40},{2,7,20},{5,1,20},{5,2,40},{2,5,40}, {5,6,20},{5,5,20},{5,3,40},{5,3,40},{5,3,20},{5,2,20}, {5,1,40},{5,2,20},{5,3,20},{5,2,20},{5,3,20},{5,2,20},{5,5,20}, {5,5,160} }; int songindex, songplaytime, songfreq1, songtone; volatile int playsongflag; int Playsong(void) { if(songplaytime) { songplaytime--; } else { if(songplaytime == 0) { if(songindex >= (sizeof(xiaopg)/sizeof(struct songdata))) { Stopplaysong(); return 0; } } stop_buzzer(); songplaytime = xiaopg[songindex].time; songfreq1 = xiaopg[songindex].freq; songtone = xiaopg[songindex].tone; if(songfreq) { start_buzzer(songfreq[songtone][songfreq1]); } ++songindex; } //end else } void Startplaysong(void) { songplaytime = 0; songindex = 0; playsongflag = 1; } void Stopplaysong(void) { playsongflag = 0; songplaytime = 0; songindex = 0; stop_buzzer(); }