課程設(shè)計(jì)論文-基于單片機(jī)電子琴的設(shè)計(jì)(編輯修改稿)
2024-12-16 09:26 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 ；該鍵值為 1 LJMP NDK1 ； 跳到 NDK1 執(zhí)行相應(yīng)的功能程序 KK2: CJNE A,0BH,KK3 ；相等說(shuō)明該行第三列有鍵按下，不等則轉(zhuǎn)移 MOV BUFF,2 ；該鍵值為 2 LJMP NDK1 ；跳到 NDK1 執(zhí)行相應(yīng)的功能程序 KK3: CJNE A,07H,KK4 ；相等說(shuō)明該行第四列有鍵按下，不等則轉(zhuǎn)移 MOV BUFF,3 ；該鍵值為 2 LJMP NDK1 ；跳到 NDK1 執(zhí)行相應(yīng)的功能程序 KK4: NOP NDK1: MOV A,BUFF MOV DPTR,TABLE MOVC A,@A+DPTR MOV P0,A MOV A,BUFF MOV B,2 MUL AB MOV TEMP,A MOV DPTR,TABLE1 MOVC A,@A+DPTR MOV STH0,A MOV THO,A INC TEMP MOV A,TEMP MOVC A,@A_DPTR MOV STL0,A MOV TL0,A SETB TRO NDK1A: MOV A,P1 ANL A,OFH XRL A,0FH JNZ NDK1A CLR TR0 KKEY1: MOV P1,0FFH ；開(kāi)始掃描第二行 CLR MOV A,P1 ANL A,0FH XRL A,0FH JZ KKEY2 LCALL DELAY10MS MOV A,P1 ANL A,0FH XRL A,0FH JZ KKEY2 MOV A,P1 ANL A,0FH CJNE A,0EH,KK5 MOV BUFF,4 LJMP NDK2 KK5: CJNE A,0DH,KK6 MOV BUFF,5 LJMP NDK2 KK6: CJNE A,0BH,KK7 MOV BUFF,6 LJMP NDK2 KK7: CJNE A,07H,KK8 MOV BUFF,7 LJMP NDK2 KK8 NOP NDK2: MOV A,BUFF MOV DPTR,TABLE MOVC A,@A+DPTR MOV A,BUFF MOV B,2 MUL AB MOV TEMP,A MOV DPTR,TABLE1 MOVC A,@A+DPTR MOV STH0,A MOV TH0,A INC TEMP MOV A,TEMP MOVC A,@A+DPTR MOV STL0,A MOV TL0,A SETB TR0 NDK2A: MOV A,P1 ANL A,0FH XRL A,0FH JNZ NDK2A CLR TR0 KKEY2: MOV P1,0FFH ；開(kāi)始掃描第三行 CLR MOV A,P1 ANL A,0FH XRL A,0FH JZ KKEY3 LCALL DELAY10MS MOV A,P1 ANL A,0FH XRL A,0FH
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