Problem with A port on 18F2550

[mister_e]

make sure that there's no possible Brown-out reset @20MHz and @3 V. Usually the datasheet show the minimum voltage for a given crystal speed.

EDIT: nevermind.. misread your post.

well you'll need to post your Config Fuses line OR send your compiled .HEX files.

Make sure your ADCON setting is good as well.

[NL2TTL]

I Use the following A ports:

Input1 VAR PORTA.0 'input
Relais1 VAR PORTA.5 'output
Data_In VAR PORTA.4 'serial data
LEDRood VAR PORTA.2 'output

I use the following adcon settings:

LATA = 0
ADCON1 = 7 'poort set as digital

ADCON0 = 0
ADCON2 = 0
TRISA.1 = 1 'Input

TRISA = 255

Fuses are set:

http://www.ttalens.com/images/picbasic/fuses1.JPG

[skimask]

Does the ">Start<" go out the serial port about every 2 seconds or so?

[NL2TTL]

This is a one time operation.

[skimask]

This is a one time operation.

I know it's a one time operation. That's the way you've written it in the program.
I'm asking if, while the program is in operation, do you get the ">Start<" out of the serial port about every 2 seconds or so?

[NL2TTL]

Yes every 2 seconds

[mister_e]

Out of curiosity, which PIC programmer do you use?

could you post your compiled .HEX file?

Make sure your MCLR pin is tied to Vcc via a resistor.

Seems to work as design here...