| 1 | #!/usr/bin/perl |
| 2 | |
| 3 | # endian-swap S records; we need this because the JTAG tools we're using |
| 4 | # expect the memory image in byte-swapped format |
| 5 | # |
| 6 | # Jonathan Westhues, April 2004 |
| 7 | |
| 8 | if(@ARGV == 0) { |
| 9 | die "usage: $0 file-to-endian-swap.s19 > out.s19\n"; |
| 10 | } |
| 11 | |
| 12 | while(<>) { |
| 13 | chomp; |
| 14 | |
| 15 | if(/^S0/) { |
| 16 | next; |
| 17 | } |
| 18 | if(/^S7/) { |
| 19 | print "$_\n"; |
| 20 | next; |
| 21 | } |
| 22 | |
| 23 | if(not /^S3(..)(........)(.*)(..)$/) { |
| 24 | die "bad S record at line $.\n"; |
| 25 | } |
| 26 | |
| 27 | $data = $3; |
| 28 | $checksum = $4; |
| 29 | |
| 30 | print "S3$1$2"; |
| 31 | while($data =~ m#(..)(..)(..)(..)#g) { |
| 32 | print "$4$3$2$1"; |
| 33 | } |
| 34 | print "$checksum\n"; |
| 35 | } |