#!/usr/bin/perl
use warnings;
use strict;
use Term::ReadKey;
$|=1;

ReadMode('cbreak');

my $key = '';
 while ( $key ne 'q' ) {
     while (not defined ($key = ReadKey(-1))) {
         # No key yet
      }
    print "Get key '$key'\n";
    print ord($key);
    print "\n";
 }


__END__

while(1){
my $char;
if (defined ($char = ReadKey(0)) ) {
        print "$char->", ord($char),"\n";    # input was waiting and it was $char
} else {
          # no input was waiting
        }
}

ReadMode('normal');                  # restore normal tty settings