Mega 2560/61

Forum 2005-2010 (read only) Hardware Troubleshooting
#1

Hi All, I am using a mega 2561 which I have up & running, and talking serially without any problems. However I now need to control some pins to turn on LED, select a chip etc. I have tried allocating a pin by: const int ledPin = 2; however this actually allocates the pin as pin 19 as used on the 2560 board. I have also tried using: const int ledPin = PE4; again no success, no matter where I allocate the ledPin, it always ends up on PORT D somewhere. I have a 2560 board, and allocating using the PORT does not work either, although using the board pin numbers does work.

Any help will be appreciated. Thanks Macca

#2

The mapping of the pin numbers used by the arduino library functions is defined in .../hardware/arduino/cores/arduino/pins_arduino.* If you're trying to run on a cpu that isn't directly supported by the Arduino IDE (or isn't pin-compatible with a directly supported CPU), you'll have to edit this file appropriately.

#3

Thanks, that was the link I needed.

Macca

#4