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2011-08-12Adding basic macros for analog + digital pin information.David A. Mellis
http://code.google.com/p/arduino/issues/detail?id=495
2011-08-12Adding pin-change interrupt pin mapping macros to pins_arduino.h.David A. Mellis
http://code.google.com/p/arduino/issues/detail?id=490
2011-08-12Adding SCL, SDA, and LED #defines.David A. Mellis
2011-03-04Factoring pin definitions out of the core.David A. Mellis
That is, there's now a pins/ directory in a platform, which includes multiple directories, each of which has its own pins_arduino.h. The boards.txt gets a new preferences, <BOARD>.build.pins, whose values is a sub-directory of the pins/ directory (possibly with a "platform:" prefix). That sub-directory is then placed in the include path during compilation.