Unicorn GLCD demo.

bryan · Dec 28, 2008

Hi Pommie:

Pretty much played with everything, changing oscillators, using internal vs external. Attached is a pic of your project running on Proteus with the defines changed to make it compatible with the EP4 development board. As you can see it works fine on Proteus but just won't work on a breadboard or the EP4.

Second pic is what is displayed when the pic is first programmed, as you can see there is problems in the display. Turning off/on the board's power and then nothing will display.

I know the display is fine because I can get it to work on a breadboard or EP4 with Richard.C assembler code for the KS0108

Have tried debugging with my PK2 and still can not get anything to display, or see where the problem is. Perhaps I am missing a config setting by using the 18f4520 instead of 18f4550.

My define's

#include <p18f4520.h>

#define GLCD_Data PORTD
#define b_GLCD_GCS1 LATBbits.LATB1
#define b_GLCD_GCS2 LATBbits.LATB0
#define b_GLCD_RS LATBbits.LATB2
#define b_GLCD_RW LATBbits.LATB3
#define b_GLCD_E LATBbits.LATB4
#define b_GLCD_ON LATBbits.LATB5
#define b_GLCD_BL LATBbits.LATB6

#define TRIS_Data TRISD
#define b_TRIS_GCS1 TRISBbits.TRISB1 //GCS1
#define b_TRIS_GCS2 TRISBbits.TRISB0 //GCS2
#define b_TRIS_RS TRISBbits.TRISB2 //RS
#define b_TRIS_RW TRISBbits.TRISB3 //RW
#define b_TRIS_E TRISBbits.TRISB4 //E
#define b_TRIS_ON TRISBbits.TRISB5 //RST
#define b_TRIS_BL TRISBbits.TRISB6 //backlight

Pommie · Dec 28, 2008

That picture looks like it is a timing problem. My guess is that you are running at a much higher clock rate than I was. Try repeating the asm line in delay.

I.E.

Code:

void Delay(void){
	_asm	NOP	_endasm
	_asm	NOP	_endasm
	_asm	NOP	_endasm
	_asm	NOP	_endasm
}

Mike.

pwssr · Dec 28, 2008

blueroomelectronics said:
It looks fantastic Mike. Well done and the leaf looks great.

Did you try the scope software I attached to an earlier thread.

Bill,

I would like to try the Scope software, but can't seem to find the post. Could you please point me to it?

Thanks,
Paul

notjohndavid · Dec 29, 2008

am I just a retard or is the glcd.zip attachment no longer available for download?

blueroomelectronics · Dec 29, 2008

I'll see if I can locate it on my site.

notjohndavid · Dec 29, 2008

greatly appreciated!

blueroomelectronics · Dec 29, 2008

I've found this pair in my archives. Not sure if they're the latest though.

Pommie · Dec 29, 2008

Here you go.

Mike.

notjohndavid · Dec 29, 2008

ahh.. thanks guys This gives me something to waste time^H^H^H^H^H^H^H^H^H^Hplay with tonight

AtomSoft · Jan 16, 2009

Hey i know this thread is kinda old just wanted to say thanks for the code and i modded it slighty to fit a PIC18F448 @ 20 Mhz and here is the code if anyone needs it. (doesnt show that logo and stuff tho.)

I aslo found it does say you need to read the data twice ...

Yes, I tried the oscilloscope and it looks good.

One thing I forgot to mention earlier which may cause people problems is that the data sheet you link to (topway) doesn't mention the fact that, when reading from the display data, you need to do a dummy read before you get valid data. If you look at the plot routine you'll see what I mean. Don't you just hate it when data sheets are wrong.

Mike.

Im not sure if it was meant for that but i would have assumed it was.

Here is my code(your code) , my image and my finding in the datasheet.

Electronic2050 · Feb 7, 2009

Pommie said:
Here you go.

Mike.

I can not download files(GLCD.zip , unicorn.jpg ) in the first thread can you upload this file again.
thanks.

AtomSoft · Feb 7, 2009

Try this one:
https://www.electro-tech-online.com/threads/unicorn-glcd-demo.30617/#post679649

AtomSoft · Feb 7, 2009

AtomSoft said:
Hey i know this thread is kinda old just wanted to say thanks for the code and i modded it slighty to fit a PIC18F448 @ 20 Mhz and here is the code if anyone needs it. (doesnt show that logo and stuff tho.)

I aslo found it does say you need to read the data twice ...
Im not sure if it was meant for that but i would have assumed it was.

Here is my code(your code) , my image and my finding in the datasheet.

Here is a picture of it in action:

Electronic2050 · Feb 8, 2009

thanks (AtomSoft)
i using of GLCD.zip file for interfacing with GLCD and when i send a data or pic and other
to GLCD that appear white and null pixel are black how i inverse the state of all pixel on GLCD
i try to change the "ClearScreen" function on GLCD.c too:

void ClearScreen(void){
unsigned char i,j;
b_GLCD_GCS1=1;
b_GLCD_GCS2=1;
for(i=0;i<8;i++){
GLCD_Write_Cmd(0x40); //y=0
GLCD_Write_Cmd(0xb8+i); //x=0
for(j=0;j<0x40;j++)
GLCD_Write_Data(0xff);
}
SetPos(0,0);
}

i change the line "GLCD_Write_Data(0xff);" to "GLCD_Write_Data(0x00);"
for clear lcd with zero but it was same with 0xff.

bryan · Feb 8, 2009

In the function, add change the following

-=Bryan=-

Code:

void PutChar(unsigned char data){
unsigned char i,d;
    if(data<32){
        switch(data){
            case 13:
                XPos=0;
            case 10:
                XPos=0;
                YPos+=8;
                YPos=YPos&63;
        }
        WritePosition();
    }
    else{
        for(i=0;i<7;i++){
            d=Font[data-32][i];
            if(d!=0x55){
                d=~d;                             //ADD
                GLCD_Write_Data(d);
                MoveRight();
            }
        }
        //GLCD_Write_Data(0xff);
       GLCD_Write_Data(0x00);             //CHANGE
        MoveRight();
    }
}

Electronic2050 · Feb 11, 2009

thanks bryan i test your change and it work nice.
i need problem with logo, how i change my favorite picture to code that compatible with GLCD.c (putlogo function)
and how work the "putlogo" function?
anyone have software or converter to convert this codes.

Electronic2050 · Feb 12, 2009

anybody can help me?

bryan · Feb 12, 2009

Not sure what you want to do. Do you want to create your own logo?

Pommie · Feb 12, 2009

I have a VB program that I wrote to convert the original logo. It's really badly written and not suitable for general use but I am happy to use it to convert your logo. If you want it converting then just attach it to a post.

Mike.

Electronic2050 · Feb 13, 2009

thanks of bryan and Pommie for reply
thanks Pommie, but i don't need to convert one or two logo.
i need urgent a software for convert logo.
can you give me your software.

Unicorn GLCD demo.

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