http://forums.leaflabs.com/topic.php?id=13457 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:05:18 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=13457#post-28646 Sat, 31 Aug 2013 09:34:51 +0000 fma 28646@http://forums.leaflabs.com/ <p>Ok, thanks! I think that PWM input mode is the best solution.</p> <p>Would be nice to have something in maple, at high level, like for PWM output mode... </p> http://forums.leaflabs.com/topic.php?id=13457#post-28642 Sat, 31 Aug 2013 03:33:46 +0000 crenn 28642@http://forums.leaflabs.com/ <p>If you measure the period of the signal, then you should be able to inverse it to get the frequency.</p> <p>If you use timers, you'll need to set the channel in input capture mode, however putting it in PWM capture mode would enable you to just read the period directly from a register. The reference manual will help you with that, this thread is also related to the topic: <a href="http://forums.leaflabs.com/topic.php?id=13460" rel="nofollow">http://forums.leaflabs.com/topic.php?id=13460</a><br /> ala42 has some code there to put the timer in input capture mode.</p> <p>The other method which should work reasonably well is to use the external interrupts and capture the time using the micros() function. This should be a little bit simpler to write although the CPU will have to do the work instead of just the timer hardware. </p> http://forums.leaflabs.com/topic.php?id=13457#post-28617 Fri, 30 Aug 2013 02:10:44 +0000 fma 28617@http://forums.leaflabs.com/ <p>Hi!</p> <p>Is there a simple way to measure a frequency from a TIMx_CHx pin?</p> <p>I didn't find a ready-to-use function/object in Maple; did someone already implement this?</p> <p>Thanks,</p> <p>Frédéric </p>