Int to String

John Board

Hi,

As a quick question, how would I convert an int to a string in SPIN?

For example, if I wanted to send an int to a parallax serial LCD screen, how would I convert it so that the screen understands what I am wanting to display?

Thanks,

John

Martin_H

I use a serial LCD and use the serial terminal's Dec method to convert. But if you wanted to write to a buffer you could reuse that code inside your object.

John Board

Thanks, I hadn't even thought about FullDuplexSerial's dec method...

JonnyMac

This is a method that I add to a variant of FDS that I use in my projects -- it's especially useful for LCDs that might be used for instrumentation type displays.

pub rjdec(val, width, pchar) | tmpval, pad

'' Print right-justified decimal value
'' -- val is value to print
'' -- width is width of (space padded) field for value

'  Original code by Dave Hein
'  Added (with modifications) to FDS by Jon McPhalen

  if (val => 0)                                                                 ' if positive
    tmpval := val                                                               '  copy value
    pad := width - 1                                                            '  make room for 1 digit
  else
    if (val == negx)                                                            '  if max negative
      tmpval := posx                                                            '    use max positive for width
    else                                                                        '  else
      tmpval := -val                                                            '    make positive
    pad := width - 2                                                            '  make room for sign and 1 digit
   
  repeat while (tmpval => 10)                                                   ' adjust pad for value width > 1
    pad--
    tmpval /= 10
     
  repeat pad                                                                    ' print pad
    tx(pchar)

  dec(val)                                                                      ' print value

Note that rjdec calls the dec method.

max72

check also the basic number formatting objecs:
numbers (included in the propeller tool)
simple numbers http://obex.parallax.com/objects/182/

I really like simple numbers because it is easier to use, and has some formatting options not available in numbers (some fixed format options, for instance).
Massimo

lab_ges

I case anyone else is interested it seems this is now at.
obex.parallax.com/object/536