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just as titleï¼ now i'am use this method： a=value%1000/100; b=value%100/10; c=value%10; but it's slow，any faster methods？ thanksï¼
You do not need to produce a display update for every pulse you get. Our human brain has a limited capacity - it takes a lot of time for us to read, and if you update too often then the last digit(s) on the display will be hard to see because every reading will vary a bit, making the last digit(s) constantly change value.
If you have a sensor that produces a lot of readings, then you may decide to measure the time of 5 pulse periods instead.