#include <p16F690.inc>
     __config (_INTRC_OSC_NOCLKOUT & _WDT_OFF & _PWRTE_OFF & _MCLRE_OFF & _CP_OFF & _BOR_OFF & _IESO_OFF & _FCMEN_OFF)
org 0              ; Begginning of code
DISPLAY equ 0x22
PORTS:
	bsf       STATUS,RP0          ; select Register Page 1
	movlw     0x00           ; Move the hex value of 0 to multi purpose register W
    movwf     TRISC          ; make IO PortC all output
	movlw     0xff        ;Make  a all inputs
	movwf     TRISA
	movlw     0x10           ;set A2d Clock 
    movwf     ADCON1
	bcf       STATUS,RP0 ;Exit bank 1
	bsf       STATUS,RP1
	movlw     0xff     
	movwf     ANSEL     ; Set A2D for RA0
	bcf       STATUS,RP1
	movlw     0x01  
	movwf     ADCON0   ; Configure ADCON and turn it on
	clrf      DISPLAY
MAIN:
	call      A2D
	movf      DISPLAY,w	
	movwf     PORTC      ; Move looked up value to c
	goto 	  MAIN       ; Return to main
A2D:
	nop 
	nop
	nop
	nop
	nop  ; wait 5 uS
	bsf       ADCON0,GO ; Start the conversion
	btfss     ADCON0,GO ; Bit will stay high untill conversion is complete
	goto      $-1  ; Untill then keep going back
    movf      ADRESH,w
	movwf     DISPLAY
	return
 end