微机原理与控制第三章例子程序.docVIP

例3-1 MOV DPTR ,#2000H MOV A, #06H MOVC A, @A+DPTR 例3-2 MOV A, #20H MOV R3, #45H MOV @R0,#45H MOV 31H, #47H 例3-3 MOV A, 21H MOV 40H, A MOV R2, 22H MOV @R1, 21H MOV P2, 30H 例3-4 MOV A, R1 MOV R2,A MOV 56H, R1 例3-5 MOV A, @R0 MOV @R1,A MOV @R0, #34H MOV 32H, @R1 例3-6片外数据送至片内 方法一: ORG 0000H SJMP START ORG 0030H START: CLR A MOV DPTR, #2008H MOVC A, @A+DPTR MOV 7FH, A SJMP ＄ 方法二: ORG 0000H SJMP START ORG 2000H 2000H START: MOV A, #05H 2002H MOVC A,@A+PC MOV 7FH, A SJMP ＄ 例3-7 片外数据送片外 ORG 1000H MOV R1, #60H MOVX A,@R1 MOV DPTR, #2000H MOVX @DPTR, A SJMP ＄ 例3-8片内数据片外数据互换 ORG 0030H MOV R0, #20H MOVX A, @R0 XCH A , @R0 MOVX @R0, A SJMP ＄ 例3-9利用堆栈进行数据互换 MOV SP, #60H PUSH 20H PUSH 50H POP 20H POP 50H 例3-10分析指令对A和PSW的影响 MOV A, #5AH add A, #6BH 例3-11执行指令后A和CY的值 ADDC A, R1 ADDC A, 21H ADDC A, @R1 ADDC A, #7FH 例3-12执行程序后各寄存器和直接地址的内容 INC A INC R0 INC 43H INC @R0 INC DPTR 例3-13将片内10个数送到片外 ORG 0030H MOV R2, #10H MOV R0, #30H MOV DPTR, #2000H START: MOV A, @R0 MOVX @DPTR, A INC R0 INC DPTR DJNZ R2, START SJMP ＄ 例3-14分析A和PSW中的标志位 CLR C MOV A, #35H SUBB A, #0B6H 例3-15分析寄存器状态 DEC A DEC @R1 DEC 60H DEC R7 例3-16十进制调整 MOV A, #44H ADD A, #86H DA A SJMP ＄ 例3-17减法十进制调整 ORG 0100H CLR C MOV A, #9AH SUBB A, M2 ADD A, M1 DA A MOV M3, A CLR C SJMP ＄ 例3-18 ORG 1000H MOV R1, #20H MOV A,@R1 INC R1 MOV B,@R1 MUL AB INC R1 MOV @R1,A INC R1 MOV @R1,B SJMP ＄ 例3-19 MOV A,#20H ANL A,R0 MOV A,#0FH ANL A,20H MOV A,#0F0H ANL A,@R0 MOV A,#80H ANL 20H,A 例3-20 ORG 0030H ANL A,#0FH ANL P2,#0F0H ORL P2,A SJMP＄ 例3-21 ORG 0300H MOV DPTR,#0040H MOVX A,@DPTR XRL A,#0FH MOVX @DPTR,A SJMP ＄ 例3-22 ORG 0030H MOV A,40H CPL A INC A MOV 30H,A SJMP ＄ 例3-23 ORG 0030H CLR C MOV R0,#M MOV A,@R0 RLC A MOV @R0,A INC R0 MOV A,@R0 RLC A MOV @R0,A SJMP ＄ 例3-25 ORG 1000H 1000H 7