数字频率信号源设计

  MOV R1,#08H
SOUT3: MOV A,R2
  CLR SCL
  RLC A
  MOV SDA,C
  SETB SCL
  DJNZ R1,SOUT3

  CLR LOAD
  SETB LOAD
  NOP
  NOP
  CLR LOAD

  AJMP RE

PROCE5: CPL 01H

  AJMP RE

PROC6: MOV R0,#0FFH
PROCE6: INC R0
  MOV A,R0
  ADD A,#0EDH  ;数值还不确定
  JC PROC6
  AJMP CHANGE

PROC7: MOV R0,#013H  ;数值还不确定
PROCE7: DEC R0
  MOV A,R0
  ADD A,#0EDH
  JC PROC7

CHANGE: MOV 26H,R0
  JNB 01H,CHANGE1
  MOV A,R0
  ADD A,#013H  ;数值还不确定
  MOV 26H,A

CHANGE1:MOV DPTR,#TABLE0
  MOV A,26H
  MOV B,#04H
  MUL AB
  ADD A,DPL
  MOV DPL,A
  MOV A,B
  ADDC A,DPH
  MOV DPH,A
  MOV A,#00H
  MOVC A,@A+DPTR
  MOV R2,A
  MOV A,#01H
  MOVC A,@A+DPTR
  MOV R3,A
  MOV A,#02H
  MOVC A,@A+DPTR
  MOV R4,A
  MOV A,#03H
  MOVC A,@A+DPTR
  MOV R5,A

  MOV DPTR,#TABLE1
  MOV A,26H
  MOV B,#02H
  MUL AB
  ADD A,DPL
  MOV DPL,A
  MOV A,B
  ADDC A,DPH
  MOV DPH,A
  MOV A,#00H
  MOVC A,@A+DPTR
  MOV R6,A
  MOV A,#01H
  MOVC A,@A+DPTR
  MOV R7,A

  POP DPH
  POP DPL
  POP ACC
  RET

DISP: PUSH ACC
  PUSH DPH
  PUSH DPL
  MOV DPTR,#TABLE

  CLR P0.7
  MOV A,R6
  SWAP A
  ANL A,#0FH
  MOVC A,@A+DPTR
  MOV P2,A
  SETB P0.4
  ACALL DELAY0

  CLR P0.4
  MOV A,R6
  ANL A,#0FH
  MOVC A,@A+DPTR
  MOV P2,A
  CLR P2.4  ;不一定啊
  SETB P0.5
  ACALL DELAY0

  CLR P0.5
  MOV A,R7
  SWAP A
  ANL A,#0FH
  MOVC A,@A+DPTR
  MOV P2,A
  SETB P0.6
  ACALL DELAY0

  CLR P0.6
  MOV A,R7
  ANL A,#0FH
  MOVC A,@A+DPTR
  MOV P2,A
  SETB P0.7
  JNB 00H,DE2
  CLR P2.4
DE2: ACALL DELAY0

  POP DPL
  POP DPH
  POP ACC
  RET

DELAY0: MOV 23H,#0FFH
  DJNZ 23H,$
  RET

TABLE: DB 00010001B,11011101B,00111000B,10011000B,11010100B;0.1.2.3.4
       DB 100

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数字频率信号源设计(十二)