单片机:编程内部RAM的30H单元中的数据的高四位和内部RAM40H单元中的数据...答:取值:mov a,30h anl a,#11110000b SWAP A MOV R2,A MOV A,40H ANL A,#11110000B SWAP A MOV R3,A 送值:MOV A,30H ANL A,#00FH MOV 30H,A MOV A,R2 SWAP A ORL A,30H MOV 30H,A MOV A,40H ANL A,#00FH MOV 40H,A MOV A,R3 SWAP A ORL A,40H MOV 40H,A 交换...
51单片机汇编语言把ASCII码转换为压缩BCD码答:mov R6,#30H mov R7,#0 mov DPTR,#2000H mov R2,10 L1:movx A,@DPTR inc DPTR anl A,#0FH swap A mov R0,A movx A,@DPTR inc DPTR anl A,#0FH orl A,R0 push DPH push DPL mov DPH,r6 mov DPL,r7 movx @DPTR,A inc DPTR mov R6,DPH mov R7,DPL pop DPL pop DPH djnz...
数字电压表电路怎么设计啊答:ORL A,#80H; CLR P2.0; MOV P0,A; LCALL DELAY; SETB P2.0; RET;DELAY: MOV R6,#10;D1: MOV R7,#250; DJNZ R7,$; DJNZ R6,D1; RETTABLE: DB 3FH,06H,5BH,4FH,66H,6DH,7DH,07H,7FH,6FH, END数字直流电压表的总图 已赞过 已踩过< 你对这个回答的评价是? 评论 收起 pyl...