单片机数码管显示0至7数字的程序(共2页).doc

ORG 0000HMAIN:MOV R0,#11111110BMOV R5,#8LOOP3:MOV R3,#255LOOP2:MOV R7,#0MOV R2,#8MOV A,R0MOV R4,ALOOP:MOV A,R7MOV DPTR,#TABLEMOVC A,A+DPTRMOV P0,AMOV P2,R4LCALL DELAYMOV A,R4RL AMOV R4,AINC R7DJNZ R2,LOOPDJNZ R3,LOOP2MOV A,R0RR AMOV R0,ADJNZ R5,LOOP3SJMP MAINTABLE:DB 0C0H,0F9H,0A4H,0B0H,099H,092H,082H,0F8H,080H,090HDELAY:MOV R1,#255LOOP1:DJNZ R1,LOOP1RET