Variable Not Responding

kt88seamp · 2009-11-21 20:36

Yeah I finally got a prop [noparse]:)[/noparse]

I have been playing around with spin with a bunch of quick success. Part of getting down to the nitty gritty is with the weird issue I am having. The solution to the problem is probably simple but still no sucess after messing around trying to get it to work.

CON
_xinfreq = 5_000_000
_clkmode = xtal1 + pll16x

PUB Main

dira[noparse][[/noparse]0..3] := %1111 
LEDBlink(0, 1/4)

PUB LEDBlink(pin, freq) 
                                                                  
  repeat
    
    outa[noparse][[/noparse]pin] := 1 
    waitcnt((clkfreq * freq) + cnt) 
    outa[noparse][[/noparse]pin] := 0        
    waitcnt((clkfreq * freq) + cnt)

I am trying to pass a fraction parameter to the LED blink method but it only wants to pass integers for some reason.

Mike Green · 2009-11-21 20:49

It only passes integers because that's all there is. There are no fractions in Spin nor much in the way of floating point. You can do scaling where you represent fractions as integers like making LEDBlink take "freq" as tenths or hundredths of a second:

PUB Main
dira[noparse][[/noparse]0..3] := %1111 
LEDBlink(0, 25)

PUB LEDBlink(pin, freq)                                                 
  repeat
    outa[noparse][[/noparse]pin] := 1 
    waitcnt((clkfreq / 100 * freq) + cnt) 
    outa[noparse][[/noparse]pin] := 0        
    waitcnt((clkfreq / 100 * freq) + cnt)

Variable Not Responding

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