srec_stewie

NAME
DESCRIPTION
EXAMPLE
COPYRIGHT
MAINTAINER

NAME

srec_stewie − Stewie’s binary file format

DESCRIPTION

If you have a URL for documentation of this format, please let me know.

Any resemblance to the Motorola S-Record is superficial, and extends only to the data records. The header records and termination records are completely different. None of the other Motorola S-Records record type are available.

The Records
All records start with an ASCII capital S character, value 0x53, followed by a type specifier byte. All records consist of binary bytes.

The Header Record
Each file starts with a fixed four byte header record.

Image srec_stewie_1.png

The Data Records
Each data record consists of 5 fields. These are the type field, length field, address field, data field, and the checksum. The lines always start with a capital S character.

Image srec_stewie_2.png

Type

The type field is a one byte field that specifies whether the record has a two-byte address field (0x31), a three-byte address field (0x32) or a four-byte address field (0x33). The address is big-endian.

Record Length

The record length field is a one byte field that specifies the number of bytes in the record following this byte.

Address

This is a 2-, 3- or 4-byte address that specifies where the data in the record is to be loaded into memory.

Data

The data field contains the executable code, memory-loadable data or descriptive information to be transferred.

Checksum

The checksum is a one byte field that represents the least significant byte of the one’s complement of the sum of the values represented by the bytes making up the record’s length, address, and data fields.

The Termination Record
Each file ends with a fixed two byte termination record.

Image srec_stewie_3.png

Size Multiplier
In general, binary data will expand in sized by approximately 1.2 times when represented with this format.

EXAMPLE

Here is an hex-dump example file. It contains the data “Hello, World[rq] to be loaded at address 0.

0000: 53 30 30 33 53 31 10 00 00 48 65 6C 6C 6F 2C 20  S003S1...Hello,
0010: 57 6F 72 6C 64 0A 9D 53 38                       World..S8

COPYRIGHT

srec_cat version 1.64
Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 Peter Miller

The srec_cat program comes with ABSOLUTELY NO WARRANTY; for details use the ’srec_cat −VERSion License’ command. This is free software and you are welcome to redistribute it under certain conditions; for details use the ’srec_cat −VERSion License’ command.

MAINTAINER

Image srec_stewie_4.png