Back again with problems loading more than one jpg at a time

[neuroflux]

I have two images on a FAT formatted 4gb sdcard. They are being fed in with the following code:

#include <EEPROM.h>

#include <SPI.h>

#include <GD2.h>



void setup()

{

 GD.begin();

 //load image 1

 GD.BitmapHandle(0);

 GD.cmd_loadimage(0, 0);

 GD.load("downtown.jpg");

 //load image 2

 GD.BitmapHandle(1);

 GD.cmd_loadimage(-1, 0);

 GD.load("diner1.jpg");

}



void loop()

{

 GD.Clear();

 GD.Begin(BITMAPS);

 GD.Vertex2ii(0, 0, 0); //image 1

 GD.Vertex2ii(0, 0, 1); //image 2

 GD.swap();

}
The problem I have is nothing appears on my screen at all. If I only load one image - it's fine, so I'm guessing it's something to do with the GD.cmd_loadimage(-1, 0); line?

Any ideas?


edit: also to note is when running the "viewer" demo code - my images get stuck at about 50% loading each time :/ the SD card is fine and the images are 11kb JPGs and PNGs.

[jamesbowman]

Hmm, slightly modified to use the JPEGs from the distributed SD card set

www.excamera.com/files/Gameduino2sd.zip

and it seems to work fine. Maybe try with a different SD card?



#include <EEPROM.h>

#include <SPI.h>

#include <GD2.h>



void setup()

{

 GD.begin();

 // load image 1

 GD.BitmapHandle(0);

 GD.cmd_loadimage(0, 0);

 GD.load("selfie.jpg");

 // load image 2

 GD.BitmapHandle(1);

 GD.cmd_loadimage(-1, 0);

 GD.load("healsky3.jpg");

}



void loop()

{

 GD.Clear();

 GD.Begin(BITMAPS);

 GD.Vertex2ii(0, 0, 0); //image 1

 GD.Vertex2ii(0, 0, 1); //image 2

 GD.swap();

}


[tftlcdcyg]

The result of loading each image its great.

    selfie/healsky3, works fine
    sunrise/healsky3, works fine

    tree/healsky3, works terrible


Sketch to load selfie/sunrise/healsky3:

#include <SPI.h>

#include <GD2.h>



void setup()

{

 GD.begin();

 GD.wr(REG_PWM_DUTY, 75);  



 // load image 1

 GD.BitmapHandle(0);

 GD.cmd_loadimage(0, 0);

 GD.load("selfie.jpg");
//  GD.load("tree.jpg");

   

 // load image 2

 GD.BitmapHandle(1);

 GD.cmd_loadimage(-1, 0);

 GD.load("sunrise.jpg");    

 

 // load image 3

 GD.BitmapHandle(2);

 GD.cmd_loadimage(-2, 0);

 GD.load("healsky3.jpg");  

}



void loop()

{

 GD.Clear();

 GD.Begin(BITMAPS);  



//image 1

 GD.Vertex2ii(0, 0, 0);

 GD.Vertex2ii(0, 0, 1);

 GD.Vertex2ii(0, 0, 2);

 GD.swap();

}


Loading: tree/sunrise/healsky3:


And the question is:
          What is the correct sequence to load (3-16) images into GRAM?

THX in advance for your support.

[jamesbowman]

The FT800 has 256Kbytes of video RAM. These examples are overflowing video RAM.

An image - like "tree.jpg" - that is 480x272 uses up almost all of the RAM, so nothing can be loaded at the same time as "tree.jpg"