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1、基于proteus仿真软件任务：按下K1键，LED指示的二进制数加1；按下K2键，LED指示的二进制数加2；按下K3键，LED指示的二进制数加3；按下K4键，LED指示的二进制数加4。按键三次k1键后如图显示：页脚K1：代表加1，按了三次后为十进制的3，换位二进制后为0011，由于当引脚输出为零的时候亮，所以为1100代码：K1BITP1.4K2BITP1.5K3BITP1.6K4BITP1.7ORG0000HLJMPSTART1ORG0060HSTART1:页脚MOVDPTR,#TAB1MOVA,#00HPUSHACCSTART:MOVP1,#0FFHMOVA,P1CJNEA,#
2、0FFH,LOP1LJMPSTART;无按下LOP1:ACALLDELAY;有按下MOVP1,#0FFHMOVA,P1CJNEA,#0FFH,LOP2;有效按键LJMPSTART;无效按键LOP2:JNBACC.4,KEY1;判断键号JNBACC.5,KEY2JNBACC.6,KEY3JNBACC.7,KEY4SJMPSTART页脚KEY1:WT1:JNBK1,WT1POPACCADDA,#1PUSHACCMOVCA,A+DPTRMOVP2,ALJMPSTARTKEY2:WT2:JNBK2,WT2POPACCADDA,#2PUSHACCMOVCA,A+DPTRMOVP2,ALJMP
3、STARTKEY3:WT3:JNBK3,WT3POPACCADDA,#3页脚PUSHACCMOVCA,A+DPTRMOVP2,ALJMPSTARTKEY4:WT4:JNBK4,WT4POPACCADDA,#4PUSHACCMOVCA,A+DPTRMOVP2,ALJMPSTARTDELAY:MOVR0,#255D1:MOVR1,#255DJNZR1,$DJNZR0,D1RETTAB1:DB页脚0FFH,0FEH,0FDH,0FCH,0FBH,0FAH,0F9H,0F8H,0F7H,0F6H,0F5H,0F4H,0F3H,0F2H,0F1H,0F0HEND页脚
