/[RFID]/3m-810.pl
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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revision 37 by dpavlin, Mon Jun 1 13:09:41 2009 UTC revision 38 by dpavlin, Mon Jun 1 18:36:42 2009 UTC
# Line 310  sub write_tag { Line 310  sub write_tag {
310          my $path = "$program_path/$tag";          my $path = "$program_path/$tag";
311    
312          my $data = read_file( $path );          my $data = read_file( $path );
313            my $hex_data;
314    
315          $data = substr($data,0,16);          if ( $data =~ s{^hex\s+}{} ) {
316                    $hex_data = $data;
317                    $hex_data =~ s{\s+}{}g;
318            } else {
319    
320          my $hex_data = unpack('H*', $data) . ' 00' x ( 16 - length($data) );                  # pad to block size
321                    $data .= "\0" x ( 4 - ( length($data) % 4 ) );
322    
323          print "write_tag $tag = ",dump( $data ), " == $hex_data\n";                  my $max_len = 7 * 4;
324    
325                    if ( length($data) > $max_len ) {
326                            $data = substr($data,0,$max_len);
327                            warn "strip content to $max_len bytes\n";
328                    }
329    
330                    $hex_data = unpack('H*', $data);
331            }
332    
333            my $len = length($hex_data) / 2;
334            my $blocks = sprintf('%02x', $len / 4);
335    
336            print "write_tag $tag = ",dump( $data ), " [$len/$blocks] == $hex_data\n";
337    
338          cmd(          cmd(
339                  "d6 00  26  04  $tag  00 06 00  04 11 00 01  $hex_data 00 00 00 00  fd3b", "write $tag",                  "d6 00  ff  04  $tag  00 $blocks 00  $hex_data  ffff", "write $tag",
340                  "d6 00  0d  04 00  $tag  06  afb1", sub { assert() },                  "d6 00  0d  04 00  $tag  $blocks  afb1", sub { assert() },
341          ) foreach ( 1 .. 3 ); # xxx 3m software does this three times!          ) foreach ( 1 .. 3 ); # xxx 3m software does this three times!
342    
343          my $to = $path;          my $to = $path;
# Line 380  print "Port closed\n"; Line 398  print "Port closed\n";
398  sub writechunk  sub writechunk
399  {  {
400          my $str=shift;          my $str=shift;
401    warn "DEBUG: ", as_hex($str);
402          my $count = $port->write($str);          my $count = $port->write($str);
403            my $len = length($str);
404            die "wrong write length $count != $len in ",as_hex( $str ) if $count != $len;
405          print "#> ", as_hex( $str ), "\t[$count]\n" if $debug;          print "#> ", as_hex( $str ), "\t[$count]\n" if $debug;
406  }  }
407    
# Line 447  sub crcccitt { Line 468  sub crcccitt {
468  sub checksum {  sub checksum {
469          my ( $bytes, $checksum ) = @_;          my ( $bytes, $checksum ) = @_;
470    
         my $xor = crcccitt( substr($bytes,1) ); # skip D6  
         warn "## checksum ",dump( $bytes, $xor, $checksum ) if $debug;  
   
471          my $len = ord(substr($bytes,2,1));          my $len = ord(substr($bytes,2,1));
472          my $len_real = length($bytes) - 1;          my $len_real = length($bytes) - 1;
473    
474          if ( $len_real != $len ) {          if ( $len_real != $len ) {
475                  print "length wrong: $len_real != $len\n";                  print "length wrong: $len_real != $len\n";
476                  $bytes = substr($bytes,0,2) . chr($len_real) . substr($bytes,4);                  $bytes = substr($bytes,0,2) . chr($len_real) . substr($bytes,3);
477          }          }
478    
479            my $xor = crcccitt( substr($bytes,1) ); # skip D6
480            warn "## checksum ",dump( $bytes, $xor, $checksum ) if $debug;
481    
482          if ( defined $checksum && $xor ne $checksum ) {          if ( defined $checksum && $xor ne $checksum ) {
483                  print "checksum doesn't match: ", as_hex($xor), " != ", as_hex($checksum), " data: ", as_hex($bytes), "\n";                  print "checksum doesn't match: ", as_hex($xor), " != ", as_hex($checksum), " data: ", as_hex($bytes), "\n";
484                  return $bytes . $xor;                  return $bytes . $xor;
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