I was wondering if it is possible to change the software library for writing INO arduino sketches so that it would expect arduino shield under different set of pins. For example I want to use theese shields together: RedFly Wifi Shield:
and Arduino motor Shield rev3:
I see that I cannot stack them together because they share pin D3 but if I connect RedFly shield not by stacking but with separate wires I can connect the Red Fly shield to any 4 pins I want, for example to D20-D23 of my arduino mega board. I expect that the software library for using Red Fly won't work then. The question is: Are those libraries configurable, so they could be changed to use other set of pins? I mean is it possible without rewriting the while code? Specifically I would like to know if it is possible to any of above shields. I hadn't bought any of theese yet, and I don't know what the software libraries look like.
UPDATE: Thaks for your answers, but I couldn't found the source code of the RedFly.h library for using RedFly WiFi shield, so I don't know if it can be rewritten to use other pins. The usage examples ( http://www.watterott.net/forum/attachment/936 ) suggests that it does not takes pin configurarion in neat way (as arduino LCD library does). Anybody work with RedlFl WiFi shield? Is the library source code available on the web?