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doc/FC-on-Compal: update for voice calls working with the FR codec
author Mychaela Falconia <falcon@ivan.Harhan.ORG>
date Sat, 23 Apr 2016 05:03:38 +0000
parents 2d986b8c0e4e
children
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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1 There are 3 parts to the complete FreeCalypso software suite which are built
aad742029813 doc/Compiling: everything except gsm-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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2 independently of each other:
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3
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4 * The tools that run on a GNU/Linux PC or other host system are the most
aad742029813 doc/Compiling: everything except gsm-fw
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5 straightforward: there is a top level Makefile (named Makefile.hosttools if
aad742029813 doc/Compiling: everything except gsm-fw
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6 you looking at a development source snapshot, will be renamed to just
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7 Makefile in packaged releases of the host tools) that coordinates building
aad742029813 doc/Compiling: everything except gsm-fw
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8 and installing all of them.
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9
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10 * The gsm-fw tree, which will eventually become our main GSM firmware, needs to
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11 be built with a GNU cross-compiler toolchain for ARM7. This firmware can be
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12 built for several different target devices and with different feature
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13 configurations, hence there is no singular build for it - it's more like the
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14 Linux kernel in terms of its build configuration management.
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15
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16 * We also have a few utilities which need to be compiled to run on Calypso
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17 targets, but which are not part of gsm-fw; they are gathered in the
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18 target-utils tree. They are built with the same GNU toolchain for ARM7 as
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19 gsm-fw, but don't have any fancy configuration system.
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20
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21 Building and installing FreeCalypso host tools
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22 ==============================================
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23
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24 If you are working with a packaged FC host tools release, just run 'make', then
aad742029813 doc/Compiling: everything except gsm-fw
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25 'make install' as root. If you are working with a development source snapshot,
aad742029813 doc/Compiling: everything except gsm-fw
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26 do 'make -f Makefile.hosttools' instead.
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27
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28 The "standard" install directories are /usr/local/bin for binaries and
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29 /usr/local/share/freecalypso for helper files. If you need to change these
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30 paths to something else, you'll need to edit a bunch of individual component
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31 Makefiles, and possibly also some source files like loadtools/defpath.c -
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32 sorry, FreeCalypso is not GNU and does not use autotools.
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33
968
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34 All FreeCalypso host tools are written in plain C, and with the exception of a
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35 few utilities in the "special-purpose hacks" category, they have absolutely no
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36 library dependencies beyond libc. In other words, they are very friendly to
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37 those who like bare bones minimalist systems. The only exceptions are
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38 fc-getpirimei and fc-pirhackinit which use libcrypto from OpenSSL for DES
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39 functions, and fc-lcdemu which needs libX11 to compile and an X11 display to
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40 run. But as you can read in Host-tools-overview, these utilities are not
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41 particularly important, so if your system lacks those libraries, just edit the
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42 Makefiles to not build these utilities - it is very unlikely that you will miss
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43 them.
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44
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45 To those who are going to build distro packages from these fc-host-tools: it
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46 is recommended that you leave fc-getpirimei, fc-pirhackinit and fc-lcdemu out
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47 of the basic package - please don't create extra dependencies just to support a
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48 few odd hacks which are unlikely to ever be used by anyone other than the
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49 developer who needed them at one time and no longer even uses them herself as
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50 their original one-time purpose has already been served.
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51
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52 Building and installing the ARM7 toolchain
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53 ==========================================
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54
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55 The current "official" GNU ARM toolchain for FreeCalypso consists of
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56 binutils-2.21.1, gcc-4.5.4 and newlib-2.0.0 with a specific set of patches and
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57 build configuration options. Build it as follows:
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58
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59 1. Download these 3 source tarballs for the standard GNU+newlib components:
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60
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61 binutils-2.21.1a.tar.bz2
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62 gcc-core-4.5.4.tar.bz2
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63 newlib-2.0.0.tar.gz
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64
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65 2. Run the build+install.sh script in the toolchain directory. Read the
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66 comments in the script first for the usage instructions.
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67
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68 The toolchain thus built will need to be in your PATH before you can compile
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69 gsm-fw or target-utils.
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70
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71 Please note: the toolchain that is prescribed for FreeCalypso as above is
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72 *believed* to be equivalent to the one used by OsmocomBB, but there are no
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73 guarantees. Use any other toolchain at your own risk.
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74
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75 Compiling target-utils
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76 ======================
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77
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78 Running 'make' in the target-utils tree with the ARM7 toolchain present in your
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79 PATH will result in compalstage and loadagent being built; these are the two
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80 components needed in order to use FreeCalypso loadtools. Run 'make install' to
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81 install these target binaries in /usr/local/share/freecalypso, which is where
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82 loadtools will look for them.
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83
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84 Run 'make all' in target-utils to build some other components that aren't
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85 really needed.
864
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86
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87 Compiling FreeCalypso GSM firmware
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88 ==================================
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89
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90 The firmware in our gsm-fw tree can be built in many different configurations,
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91 hence there is no singular build for it. The configuration choices consist of:
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92
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93 * Which target device the firmware should be built for: the target device
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94 selection is made at compile time; do not attempt to take a firmware image
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95 built for one target device and flash or fc-xram it into another!
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96
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97 * What functionality is to be included. As the FreeCalypso firmware subproject
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98 moves forward, we gradually add chunks of functionality, slowly approaching
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99 what each target device is ultimately capable of. However, each time we add
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100 a new piece of functionality, the ability to build a firmware image that works
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101 like before, without the newly added functionality, still remains. Each
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102 feature to be included needs to be explicitly selected.
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103
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104 * Miscellaneous configuration: which Calypso UART should be used for what,
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105 should the firmware use a real FFS (flash file system) in flash or a fake one
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106 in RAM, etc.
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107
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108 The GSM firmware build configuration is set by way of an editable text file
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109 named build.conf; the configuration and build procedure is as follows:
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110
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111 1. Look at the available repertoire of standard configurations under
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112 gsm-fw/configs and choose which one you would like to use, either as-is or
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113 as a basis for your own;
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114
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115 2. Copy the configuration you selected to build.conf in the gsm-fw directory;
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116
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117 3. Optionally edit it to taste - the configuration language is Bourne shell;
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118
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119 4. Run 'make' in the gsm-fw directory.
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120
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121 Depending on the configuration, either a flashable or a RAM-loadable image will
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122 be built by default. A flashable image will appear in finlink/flashImage.bin;
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123 these images are meant to be programmed with fc-loadtool's flash program-bin
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124 command; the starting flash address at which the image needs to be programmed
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125 depends on the target device - see target-specific notes. A RAM-loadable image
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126 will appear in finlink/ramImage.srec; these images are meant to be loaded and
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127 run with the fc-xram utility.
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128
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129 It is possible to build either a flashable or a RAM-loadable image, or both,
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130 without changing build.conf: run 'make flashImage' or 'make ramImage' as
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131 desired. (The compilation of each module from source into a .o and all
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132 intermediate linking steps are agnostic to whether a flashImage or a ramImage
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133 is being built, only the very final link step differs.) Any otherwise working
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134 configuration can be built into a flashImage, even if it makes no logical sense
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135 to do so, but the ability to build a ramImage for a given configuration depends
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136 on the code image size (which in turn depends on the selected feature set) and
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137 the amount of RAM available on the target in question: most Calypso GSM devices
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138 have small RAM, enough to satisfy a GSM firmware's data space requirements, but
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139 not enough to hold the entire firmware code in RAM as well. Please see target-
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140 specific notes for more details.