Hello.

I'm trying to use ADCIN on 12F1840, here's the code:

Code:
;----[12F1840 Hardware Configuration]-------------------------------------------
#IF __PROCESSOR__ = "12F1840"
  #DEFINE MCU_FOUND 1
#CONFIG
cfg1 = _FOSC_INTOSC           ; INTOSC oscillator: I/O function on CLKIN pin
cfg1&= _WDTE_OFF              ; WDT disabled
cfg1&= _PWRTE_OFF             ; PWRT disabled
cfg1&= _MCLRE_OFF             ; MCLR/VPP pin function is digital input
cfg1&= _CP_OFF                ; Program memory code protection is disabled
cfg1&= _CPD_OFF               ; Data memory code protection is disabled
cfg1&= _BOREN_ON              ; Brown-out Reset enabled
cfg1&= _CLKOUTEN_OFF          ; CLKOUT function is disabled. I/O or oscillator function on the CLKOUT pin
cfg1&= _IESO_ON               ; Internal/External Switchover mode is enabled
cfg1&= _FCMEN_ON              ; Fail-Safe Clock Monitor is enabled
  __CONFIG _CONFIG1, cfg1

cfg2 = _WRT_OFF               ; Write protection off
cfg2&= _PLLEN_OFF             ; 4x PLL disabled
cfg2&= _STVREN_ON             ; Stack Overflow or Underflow will cause a Reset
cfg2&= _BORV_19               ; Brown-out Reset Voltage (Vbor), low trip point selected.
cfg2&= _LVP_OFF               ; High-voltage on MCLR/VPP must be used for programming
  __CONFIG _CONFIG2, cfg2

#ENDCONFIG

#ENDIF

;----[Verify Configs have been specified for Selected Processor]----------------
;       Note: Only include this routine once, after all #CONFIG blocks
#IFNDEF MCU_FOUND
  #ERROR "No CONFIGs found for [" + __PROCESSOR__ +"]"
#ENDIF


OSCCON = %11110000  'SET INTOSC TO 32MHZ

TRISA=%00110000 'set LATAA.4 as input
ANSELA=%00010000 'set LATAA.4 as analog
ADCON0=%00001101  'ENABLE AND CONFIGURE ADC
ADCON1=%11100011   'JUSTIFY
CM1CON0=%00000000   'DISABLE COMPARATORS

DEFINE OSC 32
DEFINE ADC_BITS 10
DEFINE ADC_SAMPLEUS 50
DEFINE ADC_CLOCK 3
VOLTAGE VAR WORD
SHEMAVALI VAR LATA.4
LED VAR LATA.2


'PACUKA:
'HIGH LED
'PAUSE 200
'LOW LED
'PAUSE 200
'GOTO PACUKA

CIKLURI:
ADCIN 3,VOLTAGE
IF VOLTAGE=>1023 THEN 
HIGH LED
else
low led
endif
pause 5
GOTO CIKLURI
The problem is that VOLTAGE variable always reads 1024, if input is not connected to ground.

Any ideas?