Mega2560 LCD Dark

[pirni]

Hy!

I got my Gameduino2 today

I only had a Arduino 2560 to test so i pinned everything but the Gameduino wont start  

If i only conect the VCC (5v) and the gnd should i see something on the LCD?

sorry for my bad english i am from Austria

[brunovr]

ciao ciao

[jamesbowman]

The Gameduino 2 display actually needs to get a command from the Arduino to boot, so on power up it stays dark until the Arduino tells it to wake up.

For the Mega, minimal hookup is GND, +5V and the 5 SPI signals (MOSI, MISO, SCK, GPU_SEL, SD_SEL).

excamera.com/sphinx/gameduino2/faq.html

With these hooked up, put a microSD card in the Gameduino 2's slot, and load the sketch "helloworld" on to the Mega. The Gameduino 2 should come to life.

[pirni]

Thx a lot!

Now it works! i forgot the sd card pin 

[Luis]

i have to put on a sd card, so it can works?

[jamesbowman]

You can turn off SDcard handling by passing ~GD_STORAGE to GD.begin, so "helloworld" is:

#include <EEPROM.h>
#include <SPI.h>
#include <GD2.h>

void setup()
{
 GD.begin(~GD_STORAGE);
}

void loop()
{
 GD.ClearColorRGB(0x103000);
 GD.Clear();
 GD.cmd_text(240, 136, 31, OPT_CENTER, "Hello world");
 GD.swap();
}

With this sketch loaded, the display should show this:

[arcadetv]

I want to switch from UNO to MEGA2560 but I can't get the wiring right.

From GD2 to Mega >>
5V >> 5V
GND >> GND
GND >> GND
VIN >> VIN

SCK >> 52
MISO >> 50
MOSI >> 51
GDsel>> 53 ?
SDsel>> 9 ??

[jamesbowman]

Pinout is here:

excamera.com/sphinx/gameduino2/#hardware


8 is GPU sel, and 9 is SD sel.