kirtan.gopal
Newbie level 4
I have implement in Proteus8 its working but not on physical model it always give 254 value in return.help me ......
where
wr- p2.4
rd-p2.5
cs p2.6
intr 2.7
Code:
ADC:
MOV P1,#00H
CLR P2.6
SETB P2.5
CLR P2.4
ACALL DELAY_200M
ACALL DELAY_200M
SETB P2.4 ; low to high pulse to WR for starting conversion
MOV R7,#225
Del_1_Sec4:
DJNZ R7,Del_1_Sec4
WAIT: JB P2.7,WAIT ; polls until INTR=0
CLR P2.6 ; ensures CS=0
MOV R7,#225
Del_1_Sec0:
DJNZ R7,Del_1_Sec0
CLR P2.5 ; high to low pulse to RD for reading the data from ADC
MOV R7,#225
Del_1_Sec1:
DJNZ R7,Del_1_Sec1
MOV VALUE,P0
SETB P2.6
SETB P2.5
RETwhere
wr- p2.4
rd-p2.5
cs p2.6
intr 2.7
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