fh.asm

学习单片机一个简单程序和硬件的开发

         ORG 0000H
 START:  MOV R0,#01H
         MOV R1,#00H
         MOV R2,#08H
         MOV R3,#100
         MOV R4,#04H
         MOV DPTR,#TAB
      K1:MOV A,R0
         MOV P3,A
         RL A
         MOV R0,A
         MOV A,R1
         MOVC A,@A+DPTR
         CPL A
         MOV P0,A
         LCALL DELAY
         INC R1
         DJNZ R2,K1
         MOV R0,#01H
         MOV R2,#08H
         DJNZ R3,K2
         MOV R3,#100
         DJNZ R4,K1
         MOV R1,#00H
         MOV R4,#04H
         SJMP K1
      K2:MOV A,R1
         SUBB A,#08H
         MOV R1,A
         SJMP K1
  DELAY: MOV R6, #5
   DEL1: MOV R7, #125
   DEL2: NOP
         NOP
         DJNZ  R7,DEL2
         DJNZ  R6, DEL1
         RET
     TAB:DB 10H,20H,40H,0FFH,40H,20H,10H,00H
         DB 10H,10H,10H,10H,92H,54H,38H,10H
         DB 10H,38H,54H,92H,10H,10H,10H,10H
         DB 81H,42H,24H,18H,18H,24H,42H,81H
         END