How Do I Convert an Integer to a String?

[Chris]

Hi All

Does verilog have a function that will allow me to convert an integer to a
string?

Thanks,
Chris

[Kevin Neilson]

Verilog is so awesomely uncasted that there is really no difference
between an integer and a string. For example,

parameter strng = {"ABC",8'd68,8'd69}; // 8'd68 is the ASCII for "D"
initial $display("%s",strng);

This should print the string "ABCDE".
-Kevin

[Jonathan Bromley]

On Fri, 28 Mar 2008 09:19:36 -0600, Kevin Neilson wrote:

>> Does verilog have a function that will allow me to convert an integer to a
>> string?

>Verilog is so awesomely uncasted that there is really no difference

>between an integer and a string. For example,
>
>parameter strng = {"ABC",8'd68,8'd69}; // 8'd68 is the ASCII for "D"
>initial $display("%s",strng);

You know, I really don't think that's quite what the OP was after
(even though it's perfectly true, in all its awesomeness).
I *love* the phrase "awesomely uncasted"!

The Right Answer (tm) is...

parameter WidthOfString = 4; // number of characters
reg my_string[ 1 : 8*WidthOfString ];
integer x;
...
$sformat(my_string, "%d", x);

That will put a string representation of the integer into the
"string", right-justified and padded with leading spaces.
Alternatively:

$sformat(my_string, "%0d", x);

will pad with leading zero bytes (nulls), which *should* be
ignored by string manipulation functions such as $display.

In SystemVerilog we have string as a proper data type, so
you can do this instead:

string sv_string;
integer x;
...
$sformat(sv_string, "%0d", x);

and now "sv_string" will automatically stretch to be
just large enough to hold the string representation of x.

Whenever I think about "strings" in traditional Verilog,
the thought carries a mental accompaniment of those
wonderful Muppets scenes of a huge audience all jumping
up and down and laughing... strings in Verilog-2001 are
not something you should take too seriously.
--
Jonathan Bromley, Consultant

DOULOS - Developing Design Know-how
VHDL * Verilog * SystemC * e * Perl * Tcl/Tk * Project Services

Doulos Ltd., 22 Market Place, Ringwood, BH24 1AW, UK
jonathan...@MYCOMPANY.com
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The contents of this message may contain personal views which
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[Jonathan Bromley]

On Fri, 28 Mar 2008 15:44:19 +0000, Jonathan Bromley wrote:

>The Right Answer (tm) is...

Oh, for heaven's sake, why do I ever open my mouth?

> reg my_string[ 1 : 8*WidthOfString ];

Let's pretend I actually wrote the sensible version:

> reg [ 1 : 8*WidthOfString ] my_string;

because it would just be too embarrassing for
someone in my position to have made such a
stupid beginner's mistake, wouldn't it? :-)

[Chris]

Thanks Jonathan - that's what I was looking for.

"Jonathan Bromley" <jonathan...@MYCOMPANY.com> wrote in message
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[Chris]

:)

"Jonathan Bromley" <jonathan...@MYCOMPANY.com> wrote in message

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