Added timer registers for Arduino Mega 2560

[GoogleCodeExporter]

also changed the warning into an error if the timer mapping cannot be 
established because the DMX would not work and the Arduino environment hides 
the warnings. 

Original issue reported on code.google.com by claudio....@gmail.com on 27 Feb 2011 at 1:13

Attachments:

• DmxSimple.cpp.patch