FreeCalypso > hg > fc-magnetite

annotate README @ 218:75ea63a3fce5

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
README updated for the current status of the project
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 15 Oct 2016 19:30:58 +0000
parents 9fb9f896bd77
children b05dba024f95
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
94
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 FreeCalypso Magnetite firmware project
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 ======================================
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 This source tree contains yet another firmware offering created under the
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 FreeCalypso umbrella. The key qualities of this firmware offering are:
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 Negatives:
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 * Builds with TI's proprietary TMS470 compiler and thus requires Wine;
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 * Some of the fw components are still in the form of binary blobs -
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 but see below on the deblobbing progress.
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 Positives:
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 * Can be built to run on Motorola C139, Openmoko GTA02 and Pirelli DP-L10
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 targets, as well as the to-be-built FCDEV3B, all from the same source tree;
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 * Works as solidly as the TCS211 "golden" reference from TI, on all of the
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 supported targets - deep sleep works, voice calls work in all codec modes
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 including AMR, the DSP dynamic download mechanism does its magic, the call
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 audio passes reliably in both directions.
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 The present FC Magnetite firmware is built on the principle of starting with
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 the known working TCS211 code base, without any major restructuring, and making
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 small incremental evolutionary changes, testing at every step to ensure that
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 nothing breaks. It is the direct opposite of the "rebuild from the ground up"
218
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
27 approach taken with our previous Citrine firmware aka "gsm-fw".
94
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 Functionality
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 =============
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 TI's GSM mobile station firmware architecture supports two ways in which the
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 GSM device may be controlled: via AT commands from an external host and/or via
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 a local UI on devices with LCD & keypad hardware. (I said "and/or" because the
218
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
35 two mechanisms can coexist.) The code we got from TI (TCS211) is very solid
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
36 and mature in the modem configuration (control via AT commands only, no UI, no
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
37 battery management, no traditional handset on/off control), but the additional
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
38 code layers that are needed for handset products but not for modems are in a
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
39 very rough "proof of concept" condition, nowhere close to a usable product.
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
40
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
41 The same situation currently exists in FreeCalypso Magnetite. As explained
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
42 below in the Build system section, a key feature of FC Magnetite is that many
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
43 different firmware configurations can be built from the same source tree. One
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
44 of the configuration choices is that you can build the fw either with or without
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
45 the phone UI layers. The work we have done earlier in the tcs211-c139 side
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
46 project (late 2015) has been integrated into Magnetite, properly conditionalized
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
47 so that TI's original configuration is fully preserved when the target != c139.
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
48 However, if you build the UI-enabled configuration for any target other than
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
49 Mot C139, it will compile, but it won't do anything useful: it will try to
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
50 display TI's 176x220 pixel color UI on the D-Sample LCD on Calypso chip select
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
51 nCS3, but this hardware doesn't exist on any of our supported targets. (The
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
52 Pirelli in particular has flash on that chip select instead, so it may interfere
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
53 with FFS operation.)
94
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54
218
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
55 Further work on the handset firmware configuration (UI, battery management and
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
56 other currently missing functionality required for a usable phone) will have to
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
57 wait until we build our own Handset Motherboard Prototype (HSMBP) with a 176x220
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
58 pixel 16-bit color LCD, replicating TI's D-Sample - I personally am not too
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
59 interested in doing this handset fw work on the very crippled Mot C139 or on
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
60 the Pirelli with its own host of issues, although others in the community are
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
61 more than welcome to take a shot at it if someone is interested.
94
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
62
218
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
63 Until then, the primary current focus of the FC Magnetite project is the
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
64 AT-command-controlled modem configuration. Both TI's original modem fw (TCS211)
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
65 and our recreation thereof in this Magnetite project support not only voice
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
66 calls and SMS, but also CSD, fax and GPRS. However, before we can really
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
67 exercise this functionality, we need to first build our long-overdue FCDEV3B
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
68 hardware. TI's standard fw architecture (kept unchanged in FC Magnetite)
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
69 assumes the availability of two UARTs: the modem UART presents a classic AT
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
70 command interface which includes the CSD, fax and GPRS functionality, whereas
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
71 the 2nd IrDA UART carries the debug trace channel (RVTMUX) essential for
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
72 developers. However, only one UART is practically accessible on Mot C139 and
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
73 Pirelli DP-L10 targets; because we could not give up RVTMUX, we gave up the
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
74 classic AT command UART channel instead. We have implemented a mechanism for
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
75 passing AT commands over RVTMUX, but this mechanism works only for the voice
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
76 and SMS AT commands, not CSD, fax or GPRS. Therefore, the latter functionality
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
77 remains inaccessible until we build our own proper Calypso board with both
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
78 UARTs brought out.
94
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
79
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
80 Build system
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
81 ============
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
82
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
83 Even though FC Magnetite is essentially unchanged TCS211 code base and builds
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
84 using TI's proprietary TMS470 compiler under Wine, the build system is entirely
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
85 new. TI's TCS211 build system, called BuSyB, works by way of a Java tool
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
86 generating a customized makefile for each desired build configuration, based on
96
9fb9f896bd77 README: grammar fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 94
diff changeset
87 lots of magic contained in a big repository of XML files. There are a bunch of
9fb9f896bd77 README: grammar fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 94
diff changeset
88 Perl scripts involved as well. The Java tool that does the heavy lifting exists
94
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
89 only as compiled Java bytecode sans source, and the surrounding Perl scripts
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
90 aren't very understandable either. And the whole thing thoroughly assumes a
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
91 Windows environment (drive letters, backslashes, case-insensitive file system)
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
92 throughout. As a result, when working with TCS211 fw with its original build
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
93 system, we had to treat these BuSyB-generated makefiles almost as being blobs in
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
94 themselves: regenerating a makefile from XML magic required major effort, there
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
95 were some bugs in the makefile generation which we couldn't fix and thus we had
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
96 to edit the makefiles manually after each regeneration - it was an utter mess,
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
97 and absolutely not an acceptable way to build a forward-looking, community-
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
98 serving project.
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
99
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
100 In FC Magnetite I have recreated the relevant parts of the TCS211 build system,
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
101 using Bourne shell magic instead of Java and XML. Just like TI's BuSyB, ours
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
102 is a makefile generation system: in order to compile the firmware in a
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
103 particular desired configuration, you run a shell script to select the config
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
104 you would like. This shell script will create a dedicated build directory tree
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
105 to fully contain this build, and populate it with generated Makefiles and some
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
106 other bits - then you go into the just-created build directory and run make
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
107 there. The source and build trees are thus cleanly separated. See
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
108 doc/Compiling for detailed instructions.
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
109
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
110 Another key difference from our previous TCS211-based firmware offerings is that
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
111 even though we still have to run TI's compiler binaries under Wine, the Wine
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
112 invokation has been moved from the top (root) of the build process to the
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
113 bottom leaves. With our previous TCS211-based works you would run Wine at the
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
114 top, and then the entire build process would proceed in the Windows environment,
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
115 using Windows versions of make and other nonsense. Not so in FC Magnetite:
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
116 in this firmware project all shell scripts, Makefiles, Perl scripts and other
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
117 build system accessories run at the native Unix level, and Wine is only invoked
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
118 at the lowest level by individual tool wrappers: for example, TI's compiler
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
119 binary cl470.exe is encapsulated in a Unix shell script called cl470 that
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120 invokes Wine to run the Windows binary, presenting the illusion of a native
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 Unix tool to all upper levels.
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
123 As yet another defenestration measure, all source files are checked into this
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124 tree with Unix line endings.
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 Blob status
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 ===========
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 A long-term FreeCalypso goal is to have our phone/modem firmware rebuild fully
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 from source without any blobs, but this goal has not been achieved yet. While
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 we do have what *seems* to be a suitable replacement source (or feasible ability
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 to reconstruct such) for every piece of TCS211 fw that came in binary-only form,
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 actually making this replacement without breaking functionality is a very
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 non-trivial endeavor. Our previous attempt to rebuild the firmware from the
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 ground up, using source pieces lifted from different available leaks and
218
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
136 building with gcc so that no TMS470 COFF blobs could be used - see FreeCalypso
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
137 Citrine - has produced only a very limited subset of the original functionality,
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
138 and until very recently even the most basic function of voice calls did not work
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
139 reliably.
94
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 Instead the new FreeCalypso firmware approach implemented in FC Magnetite is to
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 approach the blob-free goal incrementally. The new Magnetite build system is
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 specifically designed to enable the transition from the use of blobs to
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 recompilation from source to be made with very fine granularity, down to the
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 level of individual object modules within libs if necessary. We tackle one
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 binary-only component at a time, either reconstructing the missing source from
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 disassembly or adapting the source from a different version as works best in
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 each individual case, and we make a test build of the firmware using the
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 reconstructed or fitted component instead of the original blob. If the firmware
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 still works (doesn't break), we make this deblobbing transition permanent and
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 move on to the next component.
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152
218
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
153 See doc/Deblobbing for the current status of the deblobbing effort and for the
75ea63a3fce5 README updated for the current status of the project
Mychaela Falconia <falcon@freecalypso.org>
parents: 96
diff changeset
154 description of the currently available configurations.
94
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 Further reading
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 ===============
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 For various instructions and notes specific to this FreeCalypso Magnetite
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 firmware, look in the doc directory. For more information about the overall
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 FreeCalypso project and our hardware building aspirations, go to our website:
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162
596d86109e44 initial round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 https://www.freecalypso.org/