scripts/srecimage.pl

   1 #!/usr/bin/env perl
   2 #
   3 # srecimage.pl - script to convert a binary image into srec
   4 # Copyright (c) 2015 - Jo-Philipp Wich <jow@openwrt.org>
   5 #
   6 # This script is in the public domain.
   7
   8 use strict;
   9
  10 my ($input, $output, $offset) = @ARGV;
  11
  12 if (!defined($input) || !-f $input || !defined($output) ||
  13     !defined($offset) || $offset !~ /^(0x)?[a-fA-F0-9]+$/) {
  14         die "Usage: $0 <input file> <output file> <load address>\n";
  15 }
  16
  17 sub srec
  18 {
  19         my ($type, $addr, $data, $len) = @_;
  20         my @addrtypes = qw(%04X %04X %06X %08X %08X %04X %06X %08X %06X %04X);
  21         my $addrstr = sprintf $addrtypes[$type], $addr;
  22
  23         $len = length($data) if ($len <= 0);
  24         $len += 1 + (length($addrstr) / 2);
  25
  26         my $sum = $len;
  27
  28         foreach my $byte (unpack('C*', pack('H*', $addrstr)), unpack('C*', $data))
  29         {
  30                 $sum += $byte;
  31         }
  32
  33         return sprintf "S%d%02X%s%s%02X\r\n",
  34                $type, $len, $addrstr, uc(unpack('H*', $data)), ~($sum & 0xFF) & 0xFF;
  35 }
  36
  37
  38 open(IN, '<:raw', $input) || die "Unable to open $input: $!\n";
  39 open(OUT, '>:raw', $output) || die "Unable to open $output: $!\n";
  40
  41 my ($basename) = $output =~ m!([^/]+)$!;
  42
  43 print OUT srec(0, 0, $basename, 0);
  44
  45 my $off = hex($offset);
  46 my $len;
  47
  48 while (defined($len = read(IN, my $buf, 16)) && $len > 0)
  49 {
  50         print OUT srec(3, $off, $buf, $len);
  51         $off += $len;
  52 }
  53
  54 print OUT srec(7, hex($offset), "", 0);
  55
  56 close OUT;
  57 close IN;