Dmd

I was driving past one of those led advertising signs sitting on the side of the road the other day and thought to myself ‘I can do that’ So I’ve hooked up 6 of the freetronics DMD modules (in a 2x3 layout) and got down to coding up a way to do it. In the end I got it working by adding support for multiple buffers into my DMD library - github.com/cjd/DMD Since I have the ability to have multiple buffers I can now transition between buffers presentation-style. There are 8 transitions - wipe left/right/up/down, box in/out and cross in/out The following video demonstrates some of the transitions It is my sons first birthday in a few days so I thought it nice to create a moving sign for his party :) [youtube_sc url=“s4Qjski-WMY”]

I had a little while free and so ported a bunch of games I wrote for the Peggy2 to work with a pair of DMD’s In doing so the games now run at 32x32 and are controlled by a Wii nunchuck. The games are snake, pong, breakout and race. The Arduino code is available at DMD_games.zip The two screens are daisy-chained but as the cable connecting them is quite short the top one is upside-down. To get this working the modified [intlink id=“55” type=“post”]DMD library[/intlink] is setup to handle rows of displays where odd-numbered rows are upside down. See this diagram for how it is laid out (for 2x2 case)

I recently got two Dot Matrix Displays from Freetronics - They are 32x16 LED panels that can be daisychained via SPI. It came with a quick library which worked okay but could do with a few enhancements ;) My modified library supports multiple displays (tested with 2x1 and 1x2 layout - but should work with other layouts) It also supports multiple fonts, marquee text, scrolling the display around and grayscale (grayscale sort of works - but not well :( ) I have updated the examples included in the original library to use these new functions.