mirror of https://github.com/hak5/openwrt-owl.git
58 lines
1.3 KiB
Perl
58 lines
1.3 KiB
Perl
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#!/usr/bin/env perl
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#
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# srecimage.pl - script to convert a binary image into srec
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# Copyright (c) 2015 - Jo-Philipp Wich <jow@openwrt.org>
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#
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# This script is in the public domain.
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use strict;
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my ($input, $output, $offset) = @ARGV;
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if (!defined($input) || !-f $input || !defined($output) ||
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!defined($offset) || $offset !~ /^(0x)?[a-fA-F0-9]+$/) {
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die "Usage: $0 <input file> <output file> <load address>\n";
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}
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sub srec
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{
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my ($type, $addr, $data, $len) = @_;
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my @addrtypes = qw(%04X %04X %06X %08X %08X %04X %06X %08X %06X %04X);
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my $addrstr = sprintf $addrtypes[$type], $addr;
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$len = length($data) if ($len <= 0);
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$len += 1 + (length($addrstr) / 2);
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my $sum = $len;
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foreach my $byte (unpack('C*', pack('H*', $addrstr)), unpack('C*', $data))
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{
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$sum += $byte;
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}
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return sprintf "S%d%02X%s%s%02X\r\n",
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$type, $len, $addrstr, uc(unpack('H*', $data)), ~($sum & 0xFF) & 0xFF;
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}
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open(IN, '<:raw', $input) || die "Unable to open $input: $!\n";
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open(OUT, '>:raw', $output) || die "Unable to open $output: $!\n";
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my ($basename) = $output =~ m!([^/]+)$!;
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print OUT srec(0, 0, $basename, 0);
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my $off = hex($offset);
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my $len;
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while (defined($len = read(IN, my $buf, 16)) && $len > 0)
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{
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print OUT srec(3, $off, $buf, $len);
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$off += $len;
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}
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print OUT srec(7, hex($offset), "", 0);
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close OUT;
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close IN;
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