Email: Password: Remember Me | Create Account (Free)

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
???
02/24/09 16:07
Read: times


 		 #162756 - Yes, you're correct, and I undestand, connecting...
Responding to: ???'s previous message
Per,

Your response is correct, I'm trying to correlate two posts at the same time, someone mentioned I should use the 22Hz (as an example) to gate the high frequency clock (5Khz) to calculate the time actual value from those two events from their frequency inversion. Your response I understand, I should be measuring the 'time' of the 5Khz continuous wave based on how many times the 22Hz input interrupts the cycle between the two events and then base my output calculation on that delta time difference. Would that be a correct assessment? I drew it in the Frequency domain because that is what the external hardware would be providing correct? I do realize that this entire calculation needs to be in the time domain, I'm just having trouble on how to convert that properly to C so I can at least get a working baseline!

I'm apologize, I think I have the idea, now its translating all of this info into C that's messing me up!

List of 49 messages in thread
TopicAuthorDate
Tip for Speed sensor via External Interrupt            01/01/70 00:00      
   Fresh thoughts.            01/01/70 00:00      
      Try measuring time instead of count for slow pulse trains            01/01/70 00:00      
         The highest frequency would be            01/01/70 00:00      
            Once more - think time instead of frequency            01/01/70 00:00      
            Rough estimation...            01/01/70 00:00      
         On the teatering edge......            01/01/70 00:00      
            Is that not good enough?            01/01/70 00:00      
               I was having issues with that.....            01/01/70 00:00      
                  Did you read this post?            01/01/70 00:00      
                     I think that's the bullseye, I was forgetting....            01/01/70 00:00      
                     Yes, and your solution is in my code...perfect!            01/01/70 00:00      
                        Happy that it works            01/01/70 00:00      
                           I'm using this model.....at least            01/01/70 00:00      
                           I'm using this model.....at least            01/01/70 00:00      
                           Looks like I was blind to the obvious.            01/01/70 00:00      
                              All depends on the input scale            01/01/70 00:00      
                                 That will be the next step.......            01/01/70 00:00      
                                 Per,            01/01/70 00:00      
                                    Would this work for a Random() Seeding?            01/01/70 00:00      
                                       Thermal noise from a diode            01/01/70 00:00      
                        Bisection.            01/01/70 00:00      
                           I was a bit hasty ...            01/01/70 00:00      
   PLL ?            01/01/70 00:00      
      Stability            01/01/70 00:00      
         Yes, for a car            01/01/70 00:00      
            Are you sure?            01/01/70 00:00      
               your math is correct            01/01/70 00:00      
                  Ok, can you please explain...            01/01/70 00:00      
                     Should be minute not seconds, typo            01/01/70 00:00      
                        Two questions...            01/01/70 00:00      
                           Yes, 3.3V is right and works correctly            01/01/70 00:00      
                              Have you read...            01/01/70 00:00      
                                 In more detail...            01/01/70 00:00      
                                 It would take forever to go through all the combos            01/01/70 00:00      
                                    This is no log function, ...            01/01/70 00:00      
                                       This is my solution, and almost there            01/01/70 00:00      
                              do you read datasheets???            01/01/70 00:00      
                                 Yes/No            01/01/70 00:00      
                                    better perfomance if ...            01/01/70 00:00      
         The PLL approach isn't that hopeless...            01/01/70 00:00      
   period measurement            01/01/70 00:00      
      Here is an image of what I think you mean?            01/01/70 00:00      
         what derivative do you use?            01/01/70 00:00      
            I'm using the NXP LPC936            01/01/70 00:00      
         Your drawing is still in the frequency domain            01/01/70 00:00      
            Yes, you're correct, and I undestand, connecting...            01/01/70 00:00      
            Where I'm at and software recap            01/01/70 00:00      
               more step-by-step            01/01/70 00:00      

Back to Subject List