Had some help from the analoge devices compagny. They send me a little program for this board with LDR and LED :

$MOD832                         ; Use 8052&ADuC832 predefined symbols

CHAN    EQU     3               ; convert this ADC input channel..
                                ; ..chan values can be 0 thru 8
;_______________________________________________________________
                                                  ; BEGINNING OF CODE
CSEG

ORG 0000h

        JMP     MAIN            ; jump to main program
;_______________________________________________________________
                                             ; INTERRUPT VECTOR SPACE
	

;===============================================================
                                                       ; MAIN PROGRAM
ORG 004Bh

MAIN:

; PRECONFIGURE...

        MOV     ADCCON1,#080h   ; power up ADC
        MOV     ADCCON2,#CHAN   ; select channel to convert
	MOV     DACCON,#03DH	; Dac 0  0-5V 12bits
       
; PERFORM REPEATED SINGLE CONVERSIONS...

AGAIN:  MOV     A,#01H		; Delay length
	SETB    SCONV           ; innitiate single ADC conversion
        		        ; ADC ISR is called upon completion
	JNB     ADCI,$
	CLR	ADCI
	MOV     DAC0H,ADCDATAH
	MOV     DAC0L,ADCDATAL
	
	JMP     AGAIN	
	
;_______________________________________________________________
END

Now i was wondering what I need to store the ADC-values on the harddisk of my computer (like every 0,5 seconds).
I've worked with seven segments where i used serial interface who i made from three I/O pins; one DE (data enable), one SI (serial in) and one CK (shift clock). So for every byte i used the clock to put this in a shift register (one pulse for each bit, so eight pulses for a byte). Is this system simular as the usual serial interface in connection with the computer, or is there more to it?
Does there excist any program that saves this data on the harddisk and monitor them when needed to read out?

Best Regards,

John

@ JW : Prof J.Kovac said "haay" :-)