GLCD Proteus problem !

[metaru_nanbu]

Hey everyone !
===========
I'm using the ProGFX library with Atmel ATMEGA32 chip on Proteus simulator to make a simple test...
But it Gives me the warning : LOGIC contention detected , and it gives me a corrupted output on the LCD...what am i doing wrong ?
The code is supposed to fill the whole LCD black.
=========
Please help.
Attached an image of the simulation for the "LCD filling code" and the "drawing x and y axes code"
with HEX file.

Here's my CODE.

#include <gfx.h>
#include <font.h>
#include <fonts/arial12.h>
#include <math.h>

int main()
{

DDRC = 0xFF;

GFXInit();

GFXSetFont(Arial12);

GFXFillRect(0,0,127,63,GFX_COLOR_BLACK);

GFXUpdate();

}

View attachment PROTEUS MODEL.rar
View attachment HEX FILE.rar

 

[jayanth.devarayanadurga]

Logic Contention errors happen when some pins act as both output and input at the same time ie., if you configured some pin as output and then writing data to it ot configuring some pin as input and ten sending data out of it. I see you use PORTB, C, D for GLCD. Make ALL pins of PORTB, C, D as output pins using DDRBA = 0xFF; DDRC = 0xFF; DDRD = 0xFF; and Clear all the ports during initialization. See if it works.

Post your code so that it can be fixed.

 

[shigha]

If the same wire is not used as both input and output, then you try to rewire the circuit and check simulation once again

 

[metaru_nanbu]

Thanks for the reply, really appreciate it !
I've tried adding those initialization lines but still getting logic contention error.
Please check this code !

#include <gfx.h>
#include <font.h>
#include <fonts/arial12.h>
#include <math.h>

int main()
{

DDRA = 0xFF;
DDRB = 0xFF;
DDRC = 0xFF;
DDRD = 0xFF;

PORTA=0;
PORTB=0;
PORTC=0;
PORTD=0;

GFXInit();

GFXSetFont(Arial12);

GFXFillRect(0,0,127,63,GFX_COLOR_BLACK);

GFXUpdate();

}

 

[jayanth.devarayanadurga]

Then you have to dig deep inside gfx.h file. See if any Port is made as input in the header file. If you post the GLCD library files used in the project it will be helpful.

I see there is no while(1) loop in your code.

I see logic contention only on PORTC. Maybe it is a bug of Proteus. Try with another AVR microcontroller and see if you get the same error(s).

 

[metaru_nanbu]

Thanks everyone !
Here're the library files !

@jayanth.devarayanadurga
Can you please upload the proteus model file for the circuit shown in this image if possible ?

View attachment PROGFX.rar

 

[jayanth.devarayanadurga]

It is the same Proteus file you sent. It is displaying properly but PORTC has logic contentions. Send me your new hex file. I will test it. There is no problem with the library files.

 

[metaru_nanbu]

Ok here it is !

View attachment MOD_HEX.rar

What version of proteus are you using ?
...might be an issue with the version i'm using ?

 

[jayanth.devarayanadurga]

Still the same problem. Maybe a bug with Proteus ATMEGA32 or GLCD model. Try with ATMEGA128. If you get error then Change GLCD and See.

 

[metaru_nanbu]

Ok will try that.
i changed the GLCD and it gave the same result.

It's weird how it's displaying properly for your version of proteus and not for mine....
....What's your version of proteus ?

 

[jayanth.devarayanadurga]

Proteus 7.10 SP0

 

[metaru_nanbu]

How can i edit the library or even see it's contents ?
i can only access the header files which does not contain the actual functions.....
Please help ! thanks in advance.

 

[jayanth.devarayanadurga]

You can't. You can only see the header files.

 

[metaru_nanbu]

Thanks a LOT !

Few questions :
1- Is it safe to ignore the "logic contention" warnings and continue working on the project ?
2- What file should i include in order for the delay function to work in AVR studio 4 ( i tried delay.h , but it gives an error that it does not exist ) ?

I really appreciate the replies...Thanks again !

 

[jayanth.devarayanadurga]

Try in real hardware it might work. Don't know about AVR Studio 4. I use v6. Use AVR Studio 6 instead or go to AVR Studio folder and search where the delay.h file is. If it is in Include\Utils\delay.h then in the include use

#include <\util\delay.h>