51单片机4*4矩阵键盘汇编语言程序示例（原创）QQ：342250023，欢迎咨询线反转法ORG 00HLJMP MAINMAIN:MOV R0,#00HMOV R1,#00HMOV R2,#00HMOV R3,#00HMOV A,#00HAJMP KEYSCANKEYSCAN:MOV P3,#0F0HMOV A,P3ANL A,#0F0HXRL A,#0F0HJNZ DELAYDELAY:MOV R2,#05HLOOP1:MOV R3,#0FAHLOOP2:DJNZ R3,LOOP2DJNZ R2,LOOP1MOV A,P3ANL A,#0F0HMOV R0,AXRL A,#0F0HJNZ KEYSCAN1LJMP KEYSCANKEYSCAN1:MOV A,#00HMOV P3,#0FHMOV A,P3ANL A,#0FHMOV R1,AXRL A,#0FHJNZ NUMLJMP KEYSCANNUM:MOV A,R0MOV B,R1
