?? th13_adc0809模數(shù)轉(zhuǎn)換.asm
字號(hào):
DBUF EQU 30H
TEMP EQU 40H
DIN BIT P1.0
CLK BIT P1.1
ORG 0000H
LJMP START
ORG 0030H
START: MOV R0,#DBUF
MOV @R0,#0AH
INC R0
MOV @R0,#0DH
INC R0
MOV @R0,#11H
INC R0
MOV DPTR,#0FEF3H;A/D
MOV A,#0
MOVX @DPTR,A
WAIT: JNB P3.3,WAIT
MOVX A,@DPTR ; 讀入結(jié)果
MOV P1,A
MOV B,A
SWAP A
ANL A,#0FH
XCH A,@R0
INC R0
MOV A,B
ANL A,#0FH
XCH A,@R0
ACALL DISP1
acall delay
AJMP START
DISP1:
MOV R0,#DBUF
MOV R1,#TEMP
MOV R2,#5
DP10: MOV DPTR,#SEGTAB
MOV A,@R0
MOVC A,@A+DPTR
MOV @R1,A
INC R0
INC R1
DJNZ R2,DP10
MOV R0,#TEMP
MOV R1,#5
DP12: MOV R2,#8
MOV A,@R0
DP13: RLC A
MOV DIN,C
CLR CLK
SETB CLK
DJNZ R2,DP13
INC R0
DJNZ R1,DP12
RET
SEGTAB: DB 3FH,6,5BH,4FH,66H,6DH ;0,1,2,3,4,5
DB 7DH,7,7FH,6FH,77H,7CH ;6,7,8,9,A,B
DB 58H,5EH,79H,71H,0,00H ;C,D,E,F(xiàn),-
DELAY:
MOV R4,#08H
AA1: MOV R5,#0FFH
AA: NOP
NOP
DJNZ R5,AA
DJNZ R4,AA1
RET
END
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