Problem with 10-bit A/D conversion - PIC18F2455 - LCD

[richard]

ADCON2 = %10000000 ' ...and right justify result

and set the conversion clock to fosc/2
way out of specs


ADCON2 = %10000011 ' ...and right justify result and use frc

[Kuba230]

I changed
ADCON2 = %10000000

to

ADCON2 = %10000011

it is still the same

[mackrackit]

What is your ADC source and how is it connected?
What are the current readings and what are the expected readings?

[Kuba230]

Source is pressure sensor (output 0 - 1V), wchich is normaly working with 10-bit A/D - PIC16F877 conection.
I built conection with PIC18F2455, but not working properly.

[Kuba230]

Problem is solved, I changed LCD display, it is OK.

Thanks for your help.

[Heckler]

kuba230,
If I may jump in here now that your problem is solved...

but not working properly, value on LCD display is not correct.

So just curious... Was the 'bad' LCD displaying garbage characters or was it displaying a somewhat valid number??
Please be more specific as to what the 'bad' LCD was displaying.

Being more specific on describing the problem is more likely to help solve future problems

dwight

[Heckler]

To clarify... the reason I asked the above question(s) is because it seems to me that if the LCD was displaying any reasonable characters then the LCD was working.
Was it an LCD contrast issue or were the characters complete garbage??

Is it possible that you also fixed something else in your code that was suggested by the other reply's to your questions and that was the real problem??

That is why I asked about what exactly you were seeing on the LCD.

dwight