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Arduino Libraries

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Posted by JoeRuston   (1 post)  [Biography] bio
Date Thu 21 May 2015 11:42 AM (UTC)
Message
In Nick's excellent tutorial on SPI he includes <SPI.h> and "pins_arduino.h".

It would be very helpful to see the code for these two libraries and understand the difference between <...> and "..." in this context.

Please provide a link.
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Posted by Nick Gammon   Australia  (21,607 posts)  [Biography] bio   Forum Administrator
Date Reply #1 on Thu 21 May 2015 07:45 PM (UTC)
Message
Template:Arduino Please post Arduino-related questions to the Arduino Forum or to StackExchange: Arduino. This saves splitting questions and answers between this forum and the Arduino ones.



Just to explain though, these are standard include libraries. If you have the Arduino IDE you will have those files inside the installation folder. Just search for them.


See: http://www.gammon.com.au/tips#info2


Quote:

It would be very helpful to see the code for these two libraries and understand the difference between <...> and "..." in this context.


I should really have used <...> for both includes. The <...> form searches system directories for includes, whereas "..." searches the current directory. This is standard C syntax.

- Nick Gammon

www.gammon.com.au, www.mushclient.com
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Posted by Nick Gammon   Australia  (21,607 posts)  [Biography] bio   Forum Administrator
Date Reply #2 on Thu 21 May 2015 07:50 PM (UTC)
Message
In fact, the later IDE versions don't require the pins_arduino.h include (you get that automatically) so I removed that include from the examples.

- Nick Gammon

www.gammon.com.au, www.mushclient.com
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