[ask] LCD 16x2 using ATMEGA8535

[blackwingman]

Hi, I need help with programming microcontroler Atmega 8535.

I'm using LCD 16x2.
I've tried and was successful... but now when I'm changing my PCB board, the LCD become blank on the second row and full on first row.
I can't display anything on the LCD.

and also I've tried in 2 different LCD and result is the same.
I've checked all the cable and already in right position.

can someone help my problem?

PS: I'm using BASCOM for programming the microcontroler.

 

[Nikunj Tanna]

Hi,

Have you check that your new pcb is getting enough voltages and lcd on that new board getting voltages? It seems that it can be a hardware problem.

Is there any change in connections from old pcb to new one? that requires change in a code so.

Double check all these things.

NIKS

 

[blackwingman]

Hi,

Have you check that your new pcb is getting enough voltages and lcd on that new board getting voltages? It seems that it can be a hardware problem.

Is there any change in connections from old pcb to new one? that requires change in a code so.

Double check all these things.

NIKS

NOW I've tried 3 LCD 16*2 and 3 ATmega8535 Board. And still can't write to LCD...
can someone show part of programming???

 

[blackwingman]

PROBLEM SOLVED...

MY STUPIDITY...
the R/W Pin hasn't connected to GROUND...
damn...

 

[Nikunj Tanna]

Hey,

Finally got solution..The moral of the story..In most of the cases "Human is error".
Be careful next time when it comes to hardware..

NIKS