I re-generated the code from the web with full scale reading of 80. I
moved 0xff into adlow and 0x00 to adhigh. I got 019922. As my display
is not ASCII, I don't convert the result of CVDEC to ASCII. I
commented the lines below

;   convert to ascii

;	MOVLW	D'48'

;	ADDWF	CVD00,F
;	ADDWF	CVD01,F
;	ADDWF	CVD02,F
;	ADDWF	CVD03,F
;	ADDWF	CVD04,F
;	ADDWF	CVD05,F

;	max value a/d is 79.922

Later I started puting the ADRES valued in ADLOW and displayed CVD1,
CVD2, CVD3 I got erratic results on the display when I varied the ADC
input. Something like 01.0, 15.0, 02.5 on increasing the ADC input.
Looks like messed up display.

My hardware: PIC16F716, 8bit ADC, 3 digit scanning mux display.


I get good linear results when I take the following route

multiply ADRES with 0.78125
convert binary to BCD
call display

here is my code

main:
	;start the conversion
	call convert		;start the adc and get the result
	
	;ADRES has the conversion result here
	movf ADRES,w

	;we are trying the new sub from piclist CVDEC
	movwf ADLOW
	movlw 0x00
	movwf ADHIGH
	call CVDEC
	
	;CVD1 - hundreds
	;CVD2 - Tens
	;CVD3 - Units
	;decimal between tens and units	

	movf  CVD01,w
	movwf hundreds
	movf  CVD02,w
	movwf tens
	movf  CVD03,w
	movwf units

	;movwf ACC0 	;--somewhat working procedure
	;call divide         ; generats linear result

	;call binary to BCD
	;movf ACC0,w
	;movwf bin
	;call binary_to_BCD

	call display         ;refrersh three 7seg digits
	
	goto main		;repeat allover again

--
Chetan Bhargava
Web: http://www.bhargavaz.net
Blog: http://microz.blogspot.com

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