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Need a solution for external triggered timer NON-retriggerable one shot output

Question asked by bitmonkey on Mar 23, 2018
Latest reply on Mar 28, 2018 by waclawek.jan

I am looking for advise on the best way to implement a software enabled one shot external trigger timer that is NON-retriggerable.  So far I have devised a number of solutions but all seem to have a downside either in cpu cylces (software), number or timers required (complex) or external hardware and none of them feel like the elegant solution I was striving for.


Is there a way to do this with timers only?  Not using interrupts or software other than to enable the trigger when needed?


Picture is worth a wall of text right?


   Link to Logic Diagram Image (Start Here)


      Black is 1 MHz external input trigger

      Green is rising edge trigger on 1 MHz input

      Red is desired output pulse



note: moved to questions section as suggested