Timing in SPIN

K2

The following code snippet is obviously flawed. How is this fixed in SPIN without using something clunky like WAITCNT, that doesn't let the cog do anything else until the timed interval is up?

  temp := 10_000_000 + cnt                       
  repeat
    if cnt => temp                                     
      temp += 10_000_000
      (do stuff)
    (do other stuff)

Mark_T

I presume you are meaning the comparison doesn't work when cnt wraps round to negative values?

The correct way is to compare a difference, as in

  if  cnt - temp >= 0
     'do stuff

This will work so long as the delay is less than 2^31

K2

Thanks! Looks simple...now.