FreeCalypso > hg > freecalypso-tools

annotate doc/Binary-file-formats @ 995:74024eb17e04

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
fc-loadtool help: improve language regarding 16 MiB flash chips In FC project history, 16 MiB flash originally meant Pirelli DP-L10. Then we got FCDEV3B with the same flash (our own design), but now we are discovering more Calypso devices that used such large flash, both late Calypso era (Sony Ericsson K2x0) as well as much earlier ones (FIC FLUID devices.txt file with 2004 dates, Leonardo+ rev 5). Hence we need to migrate to more generic or neutral language in associated documentation, without giving elevated status to specific examples that drove our early project history.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 03 Dec 2023 21:11:12 +0000
parents b6b8307d195b
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
676
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 In FreeCalypso we use 3 different file formats for Calypso binary images, i.e.,
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 code images to be loaded into either flash or RAM or retrieved flash dumps.
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 These 3 different file formats are straight binary (*.bin), moko-style m0 (*.m0)
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 and little-endian S-records (*.srec).
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 Straight binary (*.bin)
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 =======================
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 Straight binary is our preferred format for flash dumps. It is written in the
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 native little-endian byte order of the Calypso ARM7 processor, i.e., the order
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 of bytes in the raw binary file directly corresponds to incrementing byte
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 addresses as visible to the ARM7 - any ASCII strings in the image thus appear
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 naturally. We also use the same straight binary format in native LE byte order
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 for flashable code images generated with the gcc+binutils toolchain (as opposed
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 to TI's TMS470), generated with arm-elf-objcopy -O binary - although we don't
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 have too many such code images currently given that neither FC Citrine nor FC
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 Selenite ever achieved production quality.
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 Another unrelated use of this straight binary format is for RAM-loadable code
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 images that are fed to Compal's bootloader (Motorola C1xx and Sony Ericsson
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 J100) as opposed to Calypso boot ROM. Our generally preferred image format for
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 RAM-loadable code pieces is little-endian S-records (*.srec, see below), but
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 for Compal's bootloader we use straight binary instead because of the way this
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 bootloader protocol works.
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 moko-style m0
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 =============
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 This format is a variant of Motorola hex (S-records), a variant invented by TI
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 rather than by us. This format is produced by TI's hex470 tool when run with
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 -m -memwidth 16 -romwidth 16 options, which is the configuration used by TI in
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 the Calypso program, and is read by TI's flash programming tool called FLUID.
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 TI used this format not only for flashable firmware images, but also for various
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 RAM-loadable code pieces, particularly those that comprise the target-side
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 component of FLUID.
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 The special quirk of this S-record variant format is its peculiar byte order.
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38 TI viewed it as "16-bit hex", meaning that the image is logically viewed as
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 consisting of 16-bit words rather than 8-bit bytes, each S3 record carries an
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 even number of bytes to be loaded at an even address, and each 16-bit word
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41 (4 hex digits) appears in these S3 records with its most-significant hex nibble
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 toward the left, just like the address field of each S-record. But if this
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43 image gets interpreted by some more naive tool (for example, objcopy from GNU
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 binutils) as bytes rather than 16-bit words, the result will be a reversed byte
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45 order, with all strings etc messed up.
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 In FreeCalypso we use this moko-style m0 format (our new name for what TI called
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
48 16-bit hex) only for flashable firmware images built with TI's TMS470 toolchain
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
49 (can be our own FC Magnetite or historical ones built by Openmoko or other
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
50 similar historical vendors), but never for any RAM-loadable code pieces - we use
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
51 little-endian SREC for the latter as explained below.
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
53 And what about the name? Why do we call it moko-style m0 rather than just m0?
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54 The reason is because Compal muddied our waters by introducing their own *.m0
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
55 files that were generated with -memwidth 8 -romwidth 8 instead of -memwidth 16
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 -romwidth 16, producing 8-bit hex instead of 16-bit hex. We do not support
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
57 Compal's different *.m0 files at all, and we needed some name to specifically
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
58 identify TI-style m0 files rather than Compal-style. We ended up with the name
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 moko-style rather than TI-style because we already had our mokosrec2bin program
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
60 going back to 2013-04-15, one of the very first programs written in the
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
61 FreeCalypso family of projects: our very first encounter with this file format
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
62 were mokoN firmware images put out in this *.m0 format by That Company.
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
63
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
64 Little-endian S-records (*.srec)
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
65 ================================
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
66
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
67 Back at the beginning of FreeCalypso in the spring/summer of 2013 I (Mother
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
68 Mychaela) decided to use S-records instead of straight binary for our
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
69 RAM-loadable code pieces, i.e., code that is loaded into RAM either through the
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
70 Calypso boot ROM (fc-iram) or by chain-loading via loadagent (fc-xram). I made
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
71 this decision based on two factors:
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
72
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
73 1) ARM code generated by common toolchains (both TI's TMS470 and gcc+binutils)
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
74 without special contortions is not position-independent: a code image that
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
75 was linked for a given address needs to be loaded at that specific address,
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
76 not some other.
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
77
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
78 2) An S-record image has its load address embedded in the image itself, whereas
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
79 a raw binary naturally does not carry any such extra metadata.
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
80
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
81 With SREC as the standardized hand-off format from code generation tools to
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
82 loadtools, the choice of load address is made entirely on the code generation
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
83 side; loadtools do not impose a fixed load address, nor do they require it to
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
84 be communicated via extra command line arguments or options.
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
85
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
86 However, the variant of SREC we use for RAM-loadable code pieces is not the same
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
87 as moko-style m0 - the byte order is the opposite, with our RAM-loadable code
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
88 pieces using the native little-endian byte order of the ARM7 processor as the
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
89 byte order within S3 records. Prior to the introduction of RAM-loadable FC
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
90 Magnetite fw images for Pirelli DP-L10 in late 2016 (and then likewise for our
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
91 own FCDEV3B), the only RAM-loadable code pieces we have had were built with
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
92 gcc+binutils, not with TMS470, and GNU binutils got a different take on the
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
93 S-record format than TI did: they generate byte-oriented SREC files, with the
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
94 byte order being the same as it would be in a straight binary file, matching
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
95 the target processor's memory byte addressing order. Thus GNU-style SREC has
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
96 been adopted as the format for our RAM-loadable code images for both fc-iram
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
97 and fc-xram, as opposed to TI-style SREC aka moko-style m0. The convention we
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
98 have adopted is that *.m0 filename suffix means TI-style aka moko-style,
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
99 whereas *.srec means GNU-style.
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
100
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
101 Besides the S3 record byte order, there is one other difference between TI-built
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
102 *.m0 code images and GNU-built *.srec ones: the final S7 record carries the
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
103 entry point address in GNU-built *.srec images, whereas TI's *.m0 images always
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
104 have a zero dummy address in there. Our fc-iram and fc-xram tools require the
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
105 real entry point address in the S7 record.
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
106
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
107 How do we generate ramimage.srec RAM-loadable images for fc-xram in FC
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
108 Magnetite? Answer: FC Magnetite build system includes a special ad hoc
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
109 converter program that reads ramimage.m0 produced by TI's hex470 tool and
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
110 produces ramimage.srec: it reverses the order of bytes, adds another S3 record
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
111 that writes the boot-ROM-redirected interrupt and exception vectors and
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
112 generates an S7 record with the right entry point address.
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
113
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
114 This little-endian *.srec format is actively used only for RAM-loadable code
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
115 pieces in FreeCalypso, not for anything that goes into or gets read from flash.
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
116 We do have flash dump2srec and flash program-srec commands in fc-loadtool, they
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
117 were implemented back in the founding stage of FreeCalypso in 2013 for the sake
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
118 of completeness and symmetry (it seemed right to support both binary and
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
119 S-record formats), but they never got any practical use: if you are making a
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120 flash dump, you would normally want to examine it afterward, and any such
b6b8307d195b doc: new articles Binary-file-formats and Flash-programming
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 examination almost always needs a straight binary image, not S-records.