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做了一個(gè)矩陣鍵盤程序，要求是當(dāng)按下對(duì)應(yīng)的鍵時(shí)數(shù)碼管顯示對(duì)應(yīng)的數(shù)值0到F，問(wèn)題在按下按鍵時(shí)數(shù)碼管無(wú)反應(yīng) ORG 0000H AJMP MAIN NOP MAIN: LCALL KEY LCALL DIS AJMP MAIN KEY: LCALL KEYY //調(diào)掃描鍵盤 JNZ KEY1 //有鍵按下轉(zhuǎn)KEY1 LCALL DEL AJMP MAIN KEY1: LCALL DEL //去抖 LCALL KEYY //再檢測(cè) JZ MAIN //無(wú)鍵按下轉(zhuǎn)回主程序 KEY0: JNZ KEY0 //等待釋放按鍵 CPL A MOV R3,A LCALL KEY2 KEYY: MOV P1,#0FH MOV A,P1 MOV 30H,A MOV P1,#0F0H MOV A,P1 MOV 31H,A ANL 30H,#0FH MOV A,30H ANL 31H,#0F0H ADD A,31H CPL A RET KEY2: CJNE R3,#0EEH,KEY3 MOV R2,#00H AJMP DIS KEY3: CJNE R3,#0EDH,KEY4 MOV R2,#01H AJMP DIS KEY4: CJNE R3,#0EBH,KEY5 MOV R2,#02H AJMP DIS KEY5: CJNE R3,#0E7H,KEY6 MOV R2,#03H AJMP DIS KEY6: CJNE R3,#0DEH,KEY7 MOV R2,#04H AJMP DIS KEY7: CJNE R3,#0DEH,KEY8 MOV R2,#05H AJMP DIS KEY8: CJNE R3,#0DEH,KEY9 MOV R2,#06H AJMP DIS KEY18: AJMP MAIN KEY9: CJNE R3,#0DEH,KEY10 MOV R2,#07H AJMP DIS KEY10: CJNE R3,#0DEH,KEY11 MOV R2,#08H AJMP DIS KEY11: CJNE R3,#0DEH,KEY12 MOV R2,#09H AJMP DIS KEY12: CJNE R3,#0DEH,KEY13 MOV R2,#0AH AJMP DIS KEY13: CJNE R3,#0DEH,KEY14 MOV R2,#0BH AJMP DIS KEY14: CJNE R3,#0DEH,KEY15 MOV R2,#0CH AJMP DIS KEY15: CJNE R3,#0DEH,KEY16 MOV R2,#0DH AJMP DIS KEY16: CJNE R3,#0DEH,KEY17 MOV R2,#0EH AJMP DIS KEY17: CJNE R3,#0DEH,KEY18 MOV R2,#0FH AJMP DIS DIS: MOV A,R2 MOV DPTR,#DUAN MOVC A,@A+DPTR MOV P0,A SETB P2.3 CLR P2.3 MOV P0,#0FEH SETB P2.2 LCALL DEL CLR P2.2 RET DEL: MOV R7,#50 DEL2: MOV R6,#100 DJNZ R6,$ DJNZ R7,DEL2 RET DUAN: DB 3Fh,06h,5Bh,4Fh,66h,6Dh,7Dh,07h,7Fh,6Fh,77h,7Ch,39h,5Eh,79h,71h END |
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