【導(dǎo)讀】設(shè)計內(nèi)容和設(shè)計步驟，為從事單片機相關(guān)的畢業(yè)設(shè)計或今后的工作需要打下良好的基礎(chǔ)。本次課程設(shè)計的主要內(nèi)容是以單片機為核心控制元件，設(shè)計一個電子琴。即按下按鍵1、2、3、4、5、6、7，揚聲器發(fā)出相應(yīng)音調(diào)DO、RE、MI、FA、SO、LA、SI，每。當(dāng)有按鍵按下時，按鍵對應(yīng)的LED燈對應(yīng)點亮，可以用來演奏不同的歌曲。發(fā)光二極管作流水燈顯示，達(dá)到歌曲與燈同步動作。合運用知識的能力；平時的工作態(tài)度及表現(xiàn)；答辯情況。最后按平時表現(xiàn)、報告質(zhì)量、答辯成績，其權(quán)重分別為、、，分優(yōu)、良、中、及、不及格五個等級。以單片機作為主控核心，與鍵盤、揚聲器等模塊組成核心主控制模塊，在。第二章系統(tǒng)的軟件設(shè)計...

　　

【正文】 ,08H CLR ；打開燈 D2 LJMP NEXT MI:MOV R1,0FDH MOV R0,08H MOV R2,08H CLR ；打開燈 D3 LJMP NEXT FA:MOV R1,0FDH MOV R0,33H MOV R2,08H CLR ；打開燈 D4 LJMP NEXT SO:MOV R1,0FDH MOV R0,81H MOV R2,08H CLR ；打開燈 D5 LJMP NEXT LA:MOV R1,0FDH MOV R0,0C7H MOV R2,08H CLR ；打開燈 D6 26 LJMP NEXT XI:MOV R1,0FEH MOV R0,05H MOV R2,08H CLR ；打開燈 D7 LJMP NEXT NEXT:CLR A MOV TMOD,01H ；設(shè)定定時器工作方式 MOV IE,82H ；開啟總中斷 MOV TH0,R1 ；設(shè)置初值 MOV TL0,R0 SETB TR0 ；開啟中斷 0 LOOP1: LCALL D200C ；調(diào)用延時 DJNZ R2,LOOP1 ；判定是否延時完 CLR TR0 ；關(guān)閉中斷 MOV A,0FFH ；關(guān)燈 MOV P2,A LJMP M1 ；跳轉(zhuǎn)主程序 M5:CJNE R5,04H,M9 。判斷是否為歌曲 4 MOV DPTR,QU LJMP LOOP 27 M9:CJNE R5,05H,M8 ；判斷是否為鈴聲 MOV DPTR,LS LJMP LOOP M8:CJNE R5,06H,M10 ；判斷按鍵是否到第 6次 M10:LJMP M0 M4:CJNE R5,03H,M5 ；判定是否為歌曲 3 MOV DPTR,PL LJMP LOOP M3:CJNE R5,02H,M4 ；判定是否為歌曲 2 MOV DPTR,LING LJMP LOOP M2:INC R5 ；記錄按鍵 8次數(shù) CJNE R5,01H,M3 ；判定是否為歌 曲 1 MOV DPTR,TAB LOOP: CPL ；打開燈 D8 CLR A MOVC A,@A+DPTR ；取音符 MOV R1,A INC DPTR CLR A MOVC A,@A+DPTR MOV R0,A 28 ORL A,R1 JZ NEXT0 ；判定是否為結(jié)束符號 MOV A,R0 ANL A,R1 CJNE A,0FFH,NEXT3 ；判定是否為休止符 CLR TR0 MOV R2,04H LCALL D200C INC DPTR LJMP LOOP NEXT3: MOV TMOD,01H ；設(shè)定定時器工作方式 MOV IE,82H ；開啟總中斷 MOV TH0,R1 ；設(shè)置初值 MOV TL0,R0 SETB TR0 ；開啟中斷 0 SJMP NEXT2 NEXT0:CLR TR0 ；關(guān)中斷 MOV A,0FFH ；關(guān)燈 MOV P2,A LJMP M1 ；跳轉(zhuǎn)至主程序 NEXT2: CLR A INC DPTR 29 MOVC A,@A+DPTR ；取節(jié)拍 MOV R2,A LOOP3: LCALL D200C ；調(diào)用延時 DJNZ R2,LOOP3 ；判斷是否延時完 INC DPTR ；跳到下一音符 LJMP LOOP D200C:MOV R3,65H ；延時子程序 D200B:MOV A,0FFH D200A:DEC A JNZ D200A DEC R3 CJNE R3,00H,D200B RET TAB:DB ；歌 曲 1 0FDH,81H,02H,0FDH,81H,04H,0FDH,81H,02H,0FDH,81H,04H,0FDH,08H,02H,0FDH,81H,02H DB 0FCH,43H,04H,0FDH,0C7H,04H,0FDH,81H,08H DB FDH,81H,02H,0FDH,81H,04H,0FDH,81H,02H,0FDH,81H,04H,0FDH,08H,02H,0FCH,0ABH,02H DB 0FCH,43H,04H,0FDH,08H,04H,0FCH,0ABH,08H DB 0FCH,0ABH,06H,0FDH,08H,02H,0FDH,81H,04H,0FDH,81H,02H,0FDH,81H,02H DB 0FDH,08H,04H,0FDH,08H,02H,0FCH,0ABH,02H,0FCH,43H,04H,0FCH,43H,04H DB 0FCH,0ABH,06H,0FDH,08H,02H,0FCH,43H,04H,0FCH,43H,02H,0FBH,8FH,02H 30 DB 0FBH,03H,04H,0FBH,8FH,04H,0FBH,03H,08H DB 00H,00H LING: ；歌 曲 2 DB 0FDH,08H,04H,0FDH,08H,04H,0FDH,08H,04H,0FCH,43H,04H DB 0FBH,03H,08H,0FBH,03H,08H DB 0FDH,08H,04H,0FDH,08H,04H,0FDH,08H,04H,0FCH,43H,04H DB 0FDH,08H,08H,0FCH,43H,02H,0FCH,0ABH,02H,0FDH,08H,02H,0FDH,33H,02H DB 0FDH,81H,04H,0FDH,81H,04H,0FDH,08H,04H,0FCH,43H,04H DB 0FBH,03H,04H,0FBH,03H,04H,0FBH,03H,08H DB 0FBH,8FH,04H,0FCH,0BH,04H,0FCH,43H,04H,0FDH,08H,04H DB 0FCH,0ABH,10H DB 00H,00H PL: ；歌 曲 3 DB 0FCH,43H,04H,0FCH,0ABH,04H,0FDH,08H,04H,0FCH,43H,04H DB 0FDH,81H,10H DB 0FDH,0C7H,04H, 0FDH,0C7H,04H,0FEH,05H,04H,0FDH,0C7H,04H DB 0FDH,81H,10H DB 0FDH,0C7H,04H, 0FDH,0C7H,04H,0FEH,05H,08H DB 0FDH,0C7H,04H, 0FDH,0C7H,04H,0FDH,81H,08H DB 0FDH,0C7H,04H,0FDH,81H,04H ,0FDH,08H,04H,0FDH,81H,04H DB 0FDH,08H,04H,0FCH,43H,04H,0FCH,0ABH,04H, 0FDH,08H,04H DB 0FCH,43H,10H 31 DB 00H,00H QU: ；歌 曲 4 DB 0FDH,81H,06H,0FEH,05H,02H,0FDH,81H,04H,0FDH,33H,04H DB 0FDH,08H,04H,0FCH,0ABH,04H,0FCH,43H,08H DB 0FCH,43H,04H,0FCH,43H,04H,0FCH,0ABH,04H,0FDH,08H,04H DB 0FDH,08H,04H,0FCH,43H,04H,0FDH,08H,04H,0FDH,33H,04H DB 0FDH,81H,10H DB 0FDH,81H,10H DB 00H,00H LS: 。鈴聲 DB 0FDH,0C7H,04H,0FDH,0C7H,04H,0FDH,81H,04H DB 0FDH,0C7H,04H,0FDH,0C7H,04H,0FDH,81H,04H DB 00H,00H END