1st time COMPARATOR use...

[flotulopex]

Okay, after some more trials and a correct connection to GP1 (... not GP0!!!), I got it working.

BUT how do I improve the accuracy?

When the measured voltage ist between 2,3V and 2,6V, my led flickers.

How do I fix this?

Another strange thing: if I "forget" to set the GP1 input as Analog (ANSEL), it still works(!?).

BTW, here are my corrected schema and code:
<img src="http://www.picbasic.co.uk/forum/attachment.php?attachmentid=1708&stc=1&d=118097654 5">

' Fuses
@ DEVICE PIC12F675,INTRC_OSC_NOCLKOUT ;Internal oscillator 4MHz
@ DEVICE PIC12F675,WDT_OFF
@ DEVICE PIC12F675,PWRT_ON
@ DEVICE PIC12F675,MCLR_OFF
@ DEVICE PIC12F675,BOD_OFF
@ DEVICE PIC12F675,PROTECT_OFF
@ DEVICE PIC12F675,CPD_OFF

'-------------------------------------------------------------------------------
' Registers    76543210
OSCCAL      = %10000000 'Center frequency - used with Internal 4MHz OSC
TRISIO      = %00000010 'Set Input/Output
GPIO        = %00000000 'Ports High/Low
WPU         = %00000000 'Weak pull-ups (check OPTION_REG)
OPTION_REG  = %10000000 'Pull-ups / Interrupt / Prescaler
ANSEL       = %00000010 'Analog I/O
CMCON       = %01000100 'Comparator Module settings
VRCON       = %10101100 'Voltage reference (= 2.5V)

'-------------------------------------------------------------------------------
' Variables
BatVal   var CMCON.6
BatLoLED var GPIO.2

'-----------------------------------------------------------------------------
' Program
Pause 1 'Delay to allow for VREF to settle
MAIN: 
    BatLoLED = BatVal
    pause 10
    Goto Main
End