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How to use Timer to watch the external input signal?

Question asked by Carter Lee on Sep 29, 2017



I'd like to implement such as IWDG without reset. Especially, I want to watch the one external input signal but it with limited time. So what If one external signal is toggling in defined time, no response but not then response with by using led or something like that.


What am I supposed to do to implement with such as this function?