信号发生器.asm

关于ADUC841(51内核)的各种实验程序,有串口,ADC,DAC,PWM,的应用及基于ADUC841设计的万用表源程序

       $MOD841
      SP0    EQU   50H
      CLK81  EQU   P3.5
      DAT81  EQU   P3.3
      KEYVAL EQU   31H
;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
      ORG    0000H
      LJMP   MAIN
      ORG    0003H
      LJMP   SERVE1
      ORG    002BH
      LJMP   SERVE2
      ORG    0060H
MAIN:   MOV    R0,#0FH
        CLR    A
QING:   MOV    @R0,A
        DJNZ   R0,QING
        MOV    SP,#SP0
        MOV    R3,#0FFH
        LCALL  YS
;---------------------------------------
        LCALL  INI8281
        LCALL  INI841
HERE:   LJMP   HERE
;-------------------------------------
INI841: SETB   EA
        SETB   ET2
        SETB   EX0
        MOV    T2CON,#00H
        MOV    ADCCON1,#80H 
        MOV    DACCON,#0DH
        RET
;----------------------------------
INI8281:SETB   CLK81
        SETB   DAT81
        MOV    A,#12H
        LCALL  WTO81
        MOV    A,#80H
        LCALL  WTO81
        RET
;---------------------------------
SERVE1: CLR  TR2
        MOV  A,#93H
        LCALL WTO81
        LCALL RDKVAL
        MOV   A,KEYVAL
        CJNE  A,#01H,S1
        LCALL FUNCTION1
        LJMP  S2
S1:     CJNE  A,#02H,S2
        LCALL FUNCTION2
S2:     RETI
;----------------------------------
SERVE2: CLR  TF2
KAISHI: INC  R3
        CJNE R3,#200,DADISP
        MOV  R3,#0FFH
        LJMP KAISHI
DADISP: MOV  DPTR,#TAB1
        MOV  A,R3
        MOVC A,@A+DPTR
        MOV  DAC0H,A
        MOV  DPTR,#TAB2
        MOV  A,R3
        MOVC A,@A+DPTR
        MOV  DAC0L,A
        RETI
;---------------------------------
FUNCTION1:MOV  RCAP2H,#0EAH
          MOV  RCAP2L,#65H
          MOV  TH2,#0EAH
          MOV  TL2,#65H
          SETB TR2
          RET
;-----------------------------------
FUNCTION2:MOV  RCAP2H,#0FDH
          MOV  RCAP2L,#0D7H
          MOV  TH2,#0FDH
          MOV  TL2,#0D7H
          SETB TR2
          RET
;-----------------------------
WTO81:	MOV	R6,#08H
WAT:	CLR	CLK81
	LCALL	DELAY
	SETB	CLK81
	JB	DAT81,WAT
	CLR	CLK81
	LCALL	DELAY
	SETB	CLK81
	JNB	DAT81,$
WTB81:	RLC	A
	MOV	DAT81,C
        CLR	CLK81
	LCALL	DELAY
	SETB	CLK81
	LCALL	DELAY
	LCALL	DELAY
	DJNZ	R6,WTB81
	SETB	DAT81
        RET
;-----------------------------------
RDKVAL: CLR	CLK81
	LCALL	DELAY
	SETB	CLK81
	JB	DAT81,$
        CLR	CLK81
	LCALL	DELAY
	SETB	CLK81
        MOV	R6,#08H
RD1:
        LCALL	DELAY
        LCALL	DELAY
        LCALL	DELAY
        MOV	C,DAT81
	LCALL	DELAY
	RLC	A
        CLR	CLK81
	LCALL	DELAY
	SETB	CLK81
        DJNZ	R6,RD1
        MOV	KEYVAL,A
        RET
;---------------------------------
DELAY:  NOP
        NOP
        NOP
        NOP
        NOP
        NOP
        NOP
        NOP
        NOP
        NOP
        NOP
        NOP
        RET
;----------------------------------------
YS:	MOV	R5,#00H
	MOV	R4,#50H
YS1:	DJNZ	R5,$
	DJNZ	R4,YS1
	RET
;----------------------------------------
TAB1:  DB  08H,08H,08H,08H,09H,09H,09H,09H,09H,0AH,0AH,0AH,0AH,0BH,0BH,0BH,0BH,0CH,0CH
       DB  0CH,0CH,0CH,0DH,0DH,0DH,0DH,0DH,0EH,0EH,0EH,0EH,0EH,0EH,0EH,0FH,0FH,0FH,0FH
       DB  0FH,0FH,0FH,0FH,0FH,0FH,0FH,0FH,0FH,0FH,0FH,0FH,0FH,0FH,0FH,0FH,0FH,0FH,0FH
       DB  0FH,0FH,0FH,0FH,0FH,0FH,0FH,0FH,0FH,0FH,0EH,0EH,0EH,0EH,0EH,0EH,0EH,0DH,0DH
       DB  0DH,0DH,0DH,0CH,0CH,0CH,0CH,0CH,0BH,0BH,0BH,0BH,0AH,0AH,0AH,0AH,09H,09H,09H
       DB  09H,09H,08H,08H,08H,08H,07H,07H,07H,06H,06H,06H,06H,06H,05H,05H,05H,05H,04H
       DB  04H,04H,04H,03H,03H,03H,03H,03H,02H,02H,02H,02H,02H,02H,01H,01H,01H,01H,01H
       DB  01H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H
       DB  00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,01H,01H,01H,01H
       DB  01H,01H,02H,02H,02H,02H,02H,02H,03H,03H,03H,03H,03H,04H,04H,04H,04H,05H,05H
       DB  05H,05H,06H,06H,06H,06H,06H,07H,07H,07H
TAB2:  DB  00H,40H,81H,0C1H,01H,40H,80H,0BFH,0FDH,3BH,79H,0B6H,0F2H,2DH,68H,0A2H,0DBH,13H
       DB  49H,7FH,0B4H,0E7H,19H,4AH,7AH,0A8H,0D5H,00H,2AH,52H,79H,9EH,0C1H,0E3H,03H,21H
       DB  3DH,58H,70H,87H,9CH,0AFH,0C0H,0CFH,0DCH,0E7H,0F0H,0F7H,0FCH,0FDH,0FEH,0FFH,0FCH
       DB  0F7H,0F0H,0E7H,0DCH,0CFH,0C0H,0AFH,9CH,87H,70H,58H,3DH,21H,03H,0E3H,0C1H,9EH,79H
       DB  52H,2AH,00H,0D5H,0A8H,7AH,4AH,19H,0E7H,0B4H,7FH,49H,13H,0DBH,0A2H,68H,2DH,0F2H
       DB  0B6H,79H,3BH,0FDH,0BFH,80H,40H,01H,0C1H,81H,40H,00H,0C0H,7FH,3FH,0FFH,0C0H,80H
       DB  41H,03H,0C5H,87H,4AH,0EH,0D3H,98H,5EH,25H,0EDH,0B7H,81H,4CH,19H,0E7H,0B6H,86H
       DB  58H,2BH,00H,0D6H,0AEH,87H,62H,3FH,1DH,0FDH,0DFH,0C3H,0A8H,90H,79H,64H,51H,40H,31H
       DB  24H,19H,10H,09H,04H,02H,01H,02H,04H,09H,10H,19H,24H,31H,40H,51H,64H,79H,90H,0A8H
       DB  0C3H,0DFH,0FDH,1DH,3FH,62H,87H,0AEH,0D6H,00H,2BH,58H,86H,0B6H,0E7H,19H,4CH,81H
       DB  0B7H,0EDH,25H,5EH,98H,0D3H,0EH,4AH,87H,0C5H,03H,41H,80H,0C0H,0FFH,3FH,7FH,0C0H
       END