http://forums.leaflabs.com/topic.php?id=10454 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:08:47 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=10454#post-23998 Sat, 30 Mar 2013 10:30:14 +0000 manitou 23998@http://forums.leaflabs.com/ <p>Bill Grundmann's Blog (<a href="http://billgrundmann.wordpress.com/2009/03/02/the-overhead-of-arduino-interrupts/" rel="nofollow">http://billgrundmann.wordpress.com/2009/03/02/the-overhead-of-arduino-interrupts/</a>) has a nice discussion of interrupt overhead on AVR 168. I ran a simple maple sketch with pin 13 tied to pin 12 to measure number of cycles (systick) to enter and exit an interrupt ISR using standard attachInterrupt() ISR and a version where I modified the core ISR handler. I ran similar sketches on DUE and teensy3. The results are in isrperf.txt and the DUE sketch is isrperf.ino at the following github site</p> <p><a href="https://github.com/manitou48/DUEZoo" rel="nofollow">https://github.com/manitou48/DUEZoo</a> </p>