Can't get Gameduino 2 to work - please help.

[petee]

I'm a newcomer to the Arduino and to Gameduino. I have a Leonardo that appears to be working ok (it runs basic examples like ReadAnalogVoltage).
I modified the board as follows:
    Cut tracks from U2 pins 12 (IO11*), 26 (IO12) & 32(IO13*).
    Connected ICSP header pin 4 (MOSI) to J1 pin 4 (shown as "~11").
    Connected ICSP header pin 1 (MISO) to J1 pin 5 (shown as "12").
    Connected ICSP header pin 3 (SCK) to J1 pin 6 (shown as "~13").
I installed the Gameduino 2 library.
I copied the data files to a FAT-formatted microSD card.
I attached the Gameduino 2 to the Leonardo & uploaded the "helloworld" program. The Tx & Rx LEDs blinked a couple of times, the LCD screen flashed white briefly & then - nothing.

I would be extremely grateful for any advice. I am an electronics engineer so I have the means to poke around a bit.

One question: Will the two boards together exceed the USB supply 500mA rating? I thought this could be the problem, so I connected an external 12V supply to the Arduino, but it runs too hot.

Regards,
Peter Clark. 

[jamesbowman]

Just to be clear, there is no need to cut any tracks on the Leonardo. Adding the three extra lines is fine.

The LCD screen flashing at power-up is a good sign. It means that the SPI command to initialize the GPU worked.

I would:

• check the MISO line
• try with a different USB cable/port. GD2's backlight is quite bright - it draws a lot of current

[petee]

I found that "helloworld" worked if the microSD card was removed. I had previously formatted it on my PC (I tried FAT and FAT32) and copied the data files to it as instructed. I opened some of the files using my PC without any problem, but when I plugged the card into the Gameduino it caused all the programs to hang. I used a different microSD card and now most of the programs seem to load and run ok.