Number to String

CumQuaT

Hi all,

I was wondering if anyone knew of a way to convert a number (such as a byte or long value) into a string. Normally in another programming language like BASIC you would just use STR$(Value) and bam, job's done, but in Spin, I can't seem to get it to work...

I'm building an RFID storage system and I need to store the RFID codes I scan into a text file on a flashcard and no matter what I do I can't get it to save the numbers into the text file...

Any ideas?

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sylvie369

Have you looked at the Numbers object in the OBEX? It contains the following method:

PUB ToStr(Num, Format): StrAddr
{{Convert long Num to z-string using Format; returns string address.
  PARAMETERS: Num     = 32-bit signed value to translate to ASCII string.
              Format  = Indicates output format: base, width, grouping, etc. See "FORMAT SYNTAX" for more information.
  RETURNS:    Actual length of output string, not including null terminator.}}
  BCXToText(Format >> 19 & 7, Format >> 13 & $3F, Format >> 12 & 1, Format >> 11 & 1, Format >> 5 & $3F, BinToBCX(Num, Format & $1F #> 2 <# 16))
  StrAddr := @StrBuf

JasonDorie

Check out the FullDuplexSerial or SimpleSerial objects - Both have Dec() functions that take a numeric value and convert it to a sequence of digit characters to send to the serial port.

The simplest version, in pseudo code:

byte buffer[noparse][[/noparse] 10 ]

// Build a buffer of number characters, from the one's place to the higher ones...
int index = 0
do {
  buffer[noparse][[/noparse] index ] = '0' + (value % 10)
  index += 1
  value /= 10
} while( value > 0 )

// now print the digits from index-1 down to 0  (the number is reversed to simplify the implementation)

Added: or yeah, what Sylvie said. [noparse]:)[/noparse]

max72

You'll find many different "numbers" objects.
One of my preferred for simple tasks is simple_numbers
obex.parallax.com/objects/182/

Numbers is the bigger brother, but sometimes is overkill. Formatting is more powerful, but more complex.
obex.parallax.com/objects/23/

Massimo

CumQuaT

Fantastic! Thanks for the help! Good ol' oBex!

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