Displaying values from ADC 0804 in LCD 16x2

[ressaly]

Dear experts,
I'm working on a projects that involves taking the temperature values from LM35 through ADC0804, and then display them on the LCD.
My code is as follows:

ORG 0H
RD_ADC BIT P3.0
WR_ADC BIT P3.1
INTR_ADC BIT P3.2
MOV P2,#0FFH
SETB INTR_ADC
BACK: CLR WR_ADC
SETB WR_ADC
HERE: JB INTR_ADC, HERE
CLR RD_ADC
MDATA EQU P2
MOV A, MDATA
ACALL CONVERSION
ACALL DATA_DISPLAY
SETB RD_ADC
SJMP BACK
CONVERSION:
BIN_DEC: MOV A,R0
MOV B,#100
DIV AB
MOV R	,A ; R3 CONTAIN HUNDRED NUMBER
MOV A,B
MOV B,#10
DIV AB
MOV R1,A ; R2 CONTAIN TENTH NUMBER
MOV R0,B ; R1 CONTAIN LEFT DECIMAL NUMBER
RET
DATA_DISPLAY:
		MOV	A,#38H
		ACALL	CMD
		MOV	A,#0CH
		ACALL	CMD
		MOV	A,#01H
		ACALL	CMD
		MOV	A,#82H
		ACALL	CMD
		MOV	A,#'T'
		ACALL	DISPLAY
		MOV	A,#'E'
		ACALL	DISPLAY
		MOV	A,#'M'
		ACALL	DISPLAY
		MOV	A,#'P'
		ACALL	DISPLAY
		MOV	A,#':'
		ACALL	DISPLAY
		MOV	A,R0
		ADD A, 30H
		ACALL	DISPLAY
		MOV	A,#06H
		ACALL	CMD
		MOV	A,R1
		ADD A, 30H
		ACALL	DISPLAY
		MOV	A,#06H
		ACALL	CMD
		MOV	A,R2
		ADD A, 30H
		ACALL	DISPLAY
		RET
CMD:	MOV	P0,A	; issue command code
		CLR	P1.0	; clear RS=0, for command
		CLR	P1.1	; clear R/W=0, to write to LCD
		SETB	P1.2	; set E=1
		CLR	P1.2	; clear E=0, to generate an H-to-L pulse
		ACALL	DELAY	; give LCD some time
		RET; 
DISPLAY:
		MOV	P0,A	; issue data
		SETB	P1.0	; set RS=1, for data
		CLR	P1.1	; clear R/W=0, to write to LCD
		SETB	P1.2	; set E=1
		CLR	P1.2	; clear E=0, to generate an H-to-L pulse
		ACALL	DELAY	; give LCD some time
		RET;
DELAY:	
		MOV	R3,#03FH
LOOP2:
		MOV	R4,#0FFH
LOOP1:
		DJNZ	R4,LOOP1
		DJNZ	R3,LOOP2
		RET			
				


END

But the LCD only shows "Temp: 000"
The circuit seems to be as it should.
I also need to implement an extra code in order to be able to control a dc motor controlled through P3.3 and perform 3 different speeds according to the temperature range..
I have already been all around the net looking in English, French, Malayu, Chinese, Indian.. And tested a dozen of techniques and codes without any luck.
Could you please help me, or at least advice me

Thank you

 

[Medtronic]

Dear My friend
Look at my attachment and i will support any question

Best Regards

MedTronic

 

[ressaly]

Thanks for the reply brother Medhat,
Unfortunately I'm using adc0804 not adc0808 + I'm required to do it using assembly.

 

[Medtronic]

Good my friend ... can you modulate my project .... the adc0804 is the same as adc0808 and if you can't ..... give me a time only