电子设计与单片机应用实训教程代码第十一章

1：让蜂鸣器播放3s，再停止3s，无限循环（单片机）：#include<reg52.h> //头文件#defineucharunsignedchar //宏定义#defineuintunsignedintvoiddelayms(uintxms); //函数声明sbitbuzzer=P0^0;ucharnum,i=0;voidT0_time()interrupt1 //定时器{TH0=(65535-50000)/256;//定时器装初值TL0=(65535-50000)%256;num++;}voidmain() //主函数{TMOD=0x01;//设置定时器0工作模式为1TH0=(65536-50000)/256;TL0=(65536-50000)%256;EA=1; //开总中断ET0=1;TR0=1; //定时器0开启buzzer=0; //端口置0，蜂鸣器播放while(1){if(num==60) //延时3s{ buzzer=~buzzer; //串口翻转 num=0;}}}voiddelayms(uintxms) //延时函数{uinti,j;for(i=xms;i>0;i--)for(j=110;j>0;j--);}2：《生日快乐歌》演奏（单片机）：#include<reg51.h> //头文件#defineucharunsignedchar //宏定义#defineuintunsignedintvoiddelay(uintxms); //延时函数voidmatrixkeyscan(); //矩阵键盘voidzanting(); //暂停函数voidmain();sbitBEEP=P3^7; //定义I/O口uintp=0;voidMusic(ucharnumber);voiddelay10us(uchartime);voiddelay50us(uchartime);ucharcodeSOUNDLONG[]= //控制节拍{18,6,24,24,24,48,18,6,24,24,24,48,18,6,24,24,24,24,24,18,6,24,24,24,48,0};ucharcodeSOUNDTONE[]= //控制音调{212,212,190,212,159,169,212,212,190,212,142,159,212,212,106,126,159,169,190,119,119,126,159,142,159,0};voidPlay_Music() //播放函数{uintk,n; //定义变量uintSoundLong,SoundTone;uinti,m;do{if(i>=25){i=0; //该音乐有25个音调 SoundLong=SOUNDLONG[i]; SoundTone=SOUNDTONE[i]; i++; for(n=0;n<SoundLong;n++) //控制单个音调的节拍 { matrixkeyscan(); //矩阵键盘函数 if(p==2) //若暂停键按下 zanting(); for(k=0;k<12;k++) //产生该音调的频率 { BEEP=0; for(m=0;m<SoundTone;m++); BEEP=1; //I/O口翻转 for(m=0;m<SoundTone;m++); }} delay50us(6);}}while((SOUNDLONG[i]!=0)||(SOUNDTONE[i]!=0));voiddelay10us(uchartime) //time*10微妙的延时{ uchara,b,c; for(a=0;a<time;a++) for(b=0;b<10;b++) for(c=0;c<120;c++);}voiddelay50us(uchartime) //tiam*50微妙的延时{ uchara,b; for(a=0;a<time;a++) for(b=0;b<6;b++);}voidmain(){BEEP=0; while(1) { matrixkeyscan();if(p==1) //若播放键按下 { Play_Music(); //播放音乐 delay10us(250); //一首歌播放完后延时 }}}voidmatrixkeyscan() //矩阵键盘函数编写{uchartemp,key;P2=0xfe;temp=P2;temp=temp&0xf0;if(temp!=0xf0){delay(25);temp=P2;switch(temp){case0xee:p=1;break;case0xde:break;}while(temp!=0xf0){temp=P2;temp=temp&0xf0;}}P2=0xfd;temp=P2;temp=temp&0xf0;if(temp!=0xf0){delay(25);temp=P2;temp=temp&0xf0;if(temp!=0xf0){temp=P2;switch(temp){case0xed:p=2;break;case0xdd:break;}while(temp!=0xf0){temp=P2;temp=temp&0xf0;} }}}voiddelay(uintxms) //毫秒级延时函数{uinti,j;for(i=xms;i>0;i--)for(j=110;j>0;j--);}voidzanting() //暂停函数编写{while(1){BEEP=0;matrixkeyscan();if(p==1) //若播放键按下Play_Music();}}3：《两只蝴蝶》演奏（单片机）：#include<reg51.h> //头文件#defineucharunsignedcharsbitbeepIO=P1^5; //输出口为P1.5ucharm,n;ucharcodeT[49][2]={{0,0},{0xF8,0x8B}, //控制音调{0xF8,0xF2},{0xF9,0x5B},{0xF9,0xB7},{0xFA,0x14},{0xFA,0x66},{0xFA,0xB9},{0xFB,0x03},{0xFB,0x4A},{0xFB,0x8F},{0xFB,0xCF},{0xFC,0x0B},{0xFC,0x43},{0xFC,0x78},{0xFC,0xAB},{0xFC,0xDB},{0xFD,0x08},{0xFD,0x33},{0xFD,0x5B},{0xFD,0x81},{0xFD,0xA5},{0xFD,0xC7},{0xFD,0xE7},{0xFE,0x05},{0xFE,0x21},{0xFE,0x3C},{0xFE,0x55},{0xFE,0x6D},{0xFE,0x84},{0xFE,0x99},{0xFE,0xAD},{0xFE,0xC0},{0xFE,0x02},{0xFE,0xE3},{0xFE,0xF3},{0xFF,0x02},{0xFF,0x10},{0xFF,0x1D},{0xFF,0x2A},{0xFF,0x36},{0xFF,0x42},{0xFF,0x4C},{0xFF,0x56},{0xFF,0x60},{0xFF,0x69},{0xFF,0x71},{0xFF,0x79},{0xFF,0x81}};ucharcodemusic[][2]={{0,4},{23,4}, //音谱的音调和节拍{21,4},{23,16},{23,4},{21,4},{23,4},{21,4},{19,16},{16,4},{19,4},{21,8},{21,4},{23,4},{21,4},{19,4},{16,4},{19,4},{14,24},{23,4},{21,4},{23,16},{23,4},{21,4},{23,4},{21,4},{19,24},{16,4},{19,4},{21,8},{21,4},{23,4},{21,4},{19,4},{16,4},{19,4},{21,24},{23,4},{21,4},{23,16},{23,4},{21,4},{23,4},{21,4},{19,16},{16,4},{19,4},{21,8},{21,4},{23,4},{21,4},{19,4},{16,4},{19,4},{14,24},{23,4},{26,4},{26,16},{26,4},{28,4},{26,4},{23,24},{21,4},{23,4},{21,8},{21,4},{23,4},{21,4},{19,4},{16,4},{16,2},{19,2},{19,24},{0,20},{26,4},{26,4},{28,4},{31,4},{30,4},{30,4},{28,4},{23,4},{21,4},{21,4},{23,16},{0,4},{23,4},{23,4},{26,4},{28,8},{28,12},{16,4},{23,4},{21,4},{21,24},{23,4},{26,4},{26,4},{23,4},{26,8},{0,4},{31,8},{30,4},{28,4},{30,4},{23,8},{0,4},{28,4},{28,4},{30,4},{28,4},{26,4},{23,4},{21,8},{23,4},{21,4},{23,4},{26,16},{0xFF,0xFF}};voiddelay(ucharp) //延时函数{uchari,j;for(;p>0;p--)for(i=181;i>0;i--)for(j=181;j>0;j--);}voidpause(){uchari,j;for(i=150;i>0;i--)for(j=150;j>0;j--);}voidT0_int()interrupt1 //定时器{ beepIO=!beepIO;