Graphics.spin annoyance

Harley

I'm using Chip Gracey's Graphics Driver v1.0 and when printing to a LCD screen.

When a previously larger decimal value is displayed, and then later a shorter value is posted, the right most digits are not cleared. Thus a value, say, of 'value=1234' is displayed and then the value becomes smaller and smaller, say '9', the 'value=9xxx' is displayed, where the 'xxx' is the last previously posted numbers shown. Very confusing trying to decipher actual value.

Is there a way to overwrite with spaces or something to remove previous larger number of digits? I wish there were something for decimal similar to hex, where you specify how many digits to display.

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Harley Shanko

Phil Pilgrim (PhiPi)

Harley said...
Is there a way to overwrite with spaces or something ... ?

Yes, by overwriting with spaces. Just send enough spaces after the decimal number each time you send it to accommodate the maximum difference in decimal number lengths.

-Phil

Addendum: Or you could adapt my decn routine, which right-justifies the number in a fixed-width field:

[b]PUB[/b] decn(value, digits) | mindigits, val

'' Print a decimal number, right-justified in a field width given by digits.

  mindigits := ((value < 0) & 1) + 1
  [b]if[/b] (value <> $8000_0000)
    val := || value
    [b]repeat[/b] [b]while[/b] (val /= 10)
      mindigits++
  [b]if[/b] (value < 0 [b]and[/b] digits < 0)
    out("-")
    value := ||value
  [b]repeat[/b] (||digits - mindigits) #> 0
    [b]if[/b] (digits < 0) 
      out("0")
    [b]else[/b]
      out(" ")
  dec(value) 

-P.

Rayman

I think "numbers.spin" and/or "simple_numbers.spin" can give you fixed width strings from numbers...

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Harley

Thanks for the comments.

Phil, looks like I could temporarily add your routine. The program is so bloated now I can't add SD card use, not without compressing some 700+ longs!!

But it can help me NOW during the debug phase on getting everything working up to the point I could possibly make use of a SD card.

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Harley Shanko