Freetronics Forum

I have just got 2 cubes as well so have begun working on just this issue. I can link 2 cubes fairly well by chaining power+ground from one to the next, and then using two outputs on the first cube as a SoftwareSerial port connected to the second cube. I even created a custom command as 'setpixels' t...

Dennis - are you able to try set those outputs to 3.3v and see if it still works?
That way I'd at least be able to tell if the problem is the voltage or with my code

I gave that a try (and various other combinations) but with no success
I also tried removing the sleep call in the dmd_test.c file in case that was the problem but no change
Does the maximite use 5v or 3.3v?

I'd actually be thinking that the conflict is the two devices not sharing SPI nicely.
From memory there was an example or two of using the sparkfun MP3 shield with data stored in the arduino code itself (and so not using the SD card via SPI)
Give that a try and see if that is where the conflict lies

Attached is the C-code version of my test code. It uses wiringPi since that can take care of pin access. I also wrote a version of it just using the gpio command in a shell script. #!/bin/sh A=0 B=1 SCLK=3 NOE=4 CLK=14 R_DATA=12 gpio mode $A out gpio mode $B out gpio mode $SCLK out gpio mode $NOE ou...

At home I had a bunch of DMD panels and a RaspberryPi sitting idle so I figured it would be nice to link them up. I made up an adapter cable (by cutting an old IDE cable up and soldering the relevant lines to the DMD adapter plug that comes with the board. I tested the cable by manually triggering e...

I grabbed them from https://www.sparkfun.com/tutorials/337
On that page there is a link to http://www.usb.org/developers/devclass_ ... 1_12v2.pdf which contains all the values

The other day I was at Jaycar and saw that they are now selling small USB sticks that are arduino compatible. It is called the LeoStick and is made by Freetronics down in Melbourne. Seeing that it could pretend to be a USB HID device (ie keyboard/mouse) I wondered if I could do the sort of thing tha...

I have made some more additions to my version of the DMD library - it now supports multiple buffers and can even transition between them.
Video available at https://www.youtube.com/watch?v=s4Qjski-WMY
Info/source code available on my blog at http://www.adebenham.com/2012/04/dmd-sc ... ansitions/

My version of the DMD library does support grayscale/PWM (see other thread in this forum for details or http://www.adebenham.com/category/arduino/dmd/ )
Some more work needs to be done to get it working nicer but should be a good starting point.