lpcware

Which technique is good to measure frequency, GPIO or ADC

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by Sukruth on Thu Sep 12 04:30:15 MST 2013
Hi,
I need to measure input sine wave frequency (~ 200Hz),
could you kindly comment on the better technique in terms of speed, accuracy, pros and cons for,

1. use GPIO interrupt with  external schmitt trigger

OR

2.Directly use ADC to count the frequency.


Thanks

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