单片机电子琴电路图及源程序代码

单机子琴路及源序码关键字：

单片机电子琴程序代实验仿真图源程序代码:(弹奏部分代码暂时去见需的留,载请注明出谢!)EQUWEIEQULED0ORG0000H复位地址LJMPMAIN跳转到主程序ORG0003H外部中断入地址LJMPINT00;跳转到外部中断0务程序ORG000BH中入口LJMP;跳转到T0中断服务程序ORG0030H主程序入口地址MAIN:MOVDPTR,#LED0MOVA,#00HMOVX@DPTR,AMOVTMOD,#01H;写入控制字,位定时方式SETBIT0外部中断为下降沿触发

MOVIE,#83H;开中断MOV;取简谱码指针MOV;选择音乐节奏灯循环次数CLR23H功能选择标志：键盘：音乐NEXT:TR0JNB23H,KEYPLAY若标志位是0则到键盘程序SETBP2.2MOV;简谱码指针装入AJNB否则查询播放哪一首歌曲JNBJNBLJMPNEXT;确定不同歌曲的基地址START1:MOVDPTR,#TABLE;从处简谱码MOVMOVMOVA,#00HLJMPNEXT1START2:MOVDPTR,#TABLE2;从处取简谱码MOVMOVMOVA,#01HLJMPNEXT1START3:MOVDPTR,#TABLE3;从处简谱码MOVMOVMOVA,#02HLJMPNEXT1;键盘弹奏程序入口;键程序入口SETBP2.1CLRJNB;查询是高音还是其他的音JNBP0.5,MIDDLETONEJNBP0.6,HIGHTONELJMPNEXT;没有选择高中低音则重新查询

;确定高中低音基地址LOWTONE:MOVDPTR,#LOWTABLE;赋基地址值MOVMOVLJMP;跳转到按键查询程序MIDDLETONE:MOVDPTR,#MIDDLETABLEMOVMOVLJMPHIGHTONE:MOVDPTR,#HIGHTABLEMOVMOVLJMP;歌曲播放程序MOVMOVCA,@A+DPTRMOVDPTR,#DUANMOVX@DPTR,AMOVDPTR,#WEIMOVMOVX@DPTR,AMOVMOVMOVA,30HMOVCA,@A+DPTRMOVR2,A;取得的简谱码暂存于JZ;是否取到结束码;不是，则取节拍码MOVR5,A;节拍码存于R5MOVA,R2;将简谱码装入AA高、低位换;取音符码SING取得的音符码是否为？CLRTR0是则不发音;跳到DECA取得的音符码减不含0)MOV存入22H单元

RLA;乘MOVDPTR,#TABLE1;到中取相对的高位字节值MOVCA,@A+DPTRMOV;取得的高位字节装入TH0和单元MOVMOV再装入取得的音符码RlA乘2A;加MOVCA,@A+DPTR到中取相对的低位字节值MOVTL0,A;取得的高位字节装入TL0和单元MOVSETBTR0;启动T0LCALLDELAY基本单位时间拍，延时187毫秒30H取简谱码指针加LJMPNEXT取下一个码END0:TR0;停止CLR30H;清零简朴指针LJMPNEXT重复循环;按键查询程序判断是哪个音的按键按下JNBP1.0,M0分别是DO,RE,ME....JNBP1.1,M1JNBP1.2,M2JNBP1.3,M3JNBP1.4,M4JNBP1.5,M5JNBP1.6,M6LJMPNEXT没有按键按下则跳转到循环查询;按键软件防抖动程序LCALLDELAY1延时一段时间判断按键是否继续按下，是则跳转到定偏移量程序JNBKEYLCALLDELAY1JNBKEYLCALLDELAY1JNBKEYLCALLDELAY1

JNBKEYLCALLDELAY1JNBKEYLCALLDELAY1JNBKEYLCALLDELAY1JNBKEY;确定按键的偏移地址程序M00:MOVA,#00HLJMPPLAYM11:MOVA,#01HLJMPM22:MOVA,#02HLJMPM33:MOVA,#03HLJMPM44:MOVA,#04HLJMPM55:MOVA,#05HLJMPM66:MOVA,#06HLJMP;按键音弹奏程序;音符对应的定时器初值表：

DWDWDWLOWTABLE:DW63628,63835,64021,64103,64260,64400,64524DWHIGHTABLE:DW65058,65110,65157,65178,65217,65252,65283SEG7:DB06H,5BH,4FH,66H,7DH,07H;音符节拍表：TABLE:DB02H,82HDB16H,32H,54H,02H,52HDB0A6H,32H,54H,02H,52HDBDB52H,5CH,32H,22HDB16H,12H,14H,32H,22HDB16H,12H,14H,22H,32HDB26H,12H,94H,22H,32HDBDB32H,52HDB36H,22H,14H,54HDB0ACH,92H,0A2HDBDBDB36H,22H,14H,54HDB0ACH,92H,0A2HDB16H,12H,14H,22H,32HDB2CH,02H,82HDB16H,32H,56H,12HDBDBDB62H,52H,58H,32H,22HDB16H,12H,14H,32H,22HDB16H,12H,14H,22H,32HDB26H,92H,0A4H,12H,22HDBDB00DB

DB1fH,88H,14H,24H,34H,32H,42H,54H,14HDBDBDBDB92H,84H,94H,1fH,0b8H,68H,46H,52H,68HDB74H,72H,72H,74H,62H,52H,3fH,0b8H,68HDBDBDBDB00DB82H,92H,12H,14H,12H,14H,92H,82H,12H,14H,22H,14H,92H,12H,22H,24HDB22H,24H,12H,92H,22H,24H,32H,24H,32H,52H,62H,54H,52H,64H,52H,32HDB22H,32H,22H,12H,94H,82H,92H,12H,14H,12H,14H,94H,1cHDB82H,92H,12H,14H,12H,14H,92H,82H,12H,14H,22H,14H,92H,12H,22H,24HDB22H,24H,12H,92H,22H,24H,32H,24H,32H,52H,62H,54H,52H,64H,52H,32HDB22H,32H,22H,12H,94H,82H,92H,12H,14H,12H,14H,22H,12H,1cH,32H,52HDB62H,64H,62H,64H,0b2H,62H,52H,54H,62H,54H,32H,22HDBDB66H,0b2H,0b4H,62H,52H,5cH,32H,52H,62H