FreeCalypso > hg > fc-magnetite

annotate doc/Pirelli-Howto @ 632:d968a3216ba0

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new tangomdm build target TCS211/Magnetite built for target leonardo runs just fine on the Tango-based Caramel board, but a more proper tangomdm build target is preferable in order to better market these Tango modems to prospective commercial customers. The only differences are in GPIO and MCSI config: * MCSI is enabled in the tangomdm build config. * GPIO 1 is loudspeaker amplifier control on Leonardo, but on Tango platforms it can be used for anything. On Caramel boards this GPIO should be configured as an output driving high. * GPIO 2 needs to be configured as Calypso input on Leonardo, but on Tango platforms it can be used for anything. On Caramel boards this GPIO should be configured as an output, either high or low is OK.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 04 Jan 2020 19:27:41 +0000
parents 39a226a06196
children
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1 Running FreeCalypso Magnetite firmware on the Pirelli DP-L10
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2 ============================================================
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3
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4 The Pirelli DP-L10 is a neat target for playing with FreeCalypso for a few
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5 reasons:
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6
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7 1. It has a USB port connected to one of Calypso's UARTs through a built-in
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8 CP2102 USB-serial adapter, eliminating the need for headset jack serial
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9 cables.
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10
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11 2. The huge RAM on this phone (8 MiB) makes it possible to run experimental GSM
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12 firmware images entirely in RAM without flashing - and we have successfully
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13 implemented this capability in FC Magnetite similarly to Citrine.
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15 3. Running an experimental firmware image on the Pirelli requires nothing more
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16 than a laptop, a phone and a USB cable, and can therefore be done under
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17 less-than-ideal conditions while away from your proper FreeCalypso hardware
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18 lab with an FCDEV3B setup.
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19
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20 There is, however, one difference between our Citrine and Magnetite firmwares
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21 when it comes to running on the Pirelli without flashing: Citrine uses a
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22 RAM-based fake FFS, whereas Magnetite always requires a real FFS in flash, even
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23 when the firmware code image itself is entirely RAM-based. However, just like
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24 on the C139, we do NOT use the same FFS which is used by Pirelli's official
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25 firmwares - the latter contains nothing of use to our fw, hence it is best for
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26 us to use our own separate FreeCalypso Magnetite FFS.
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27
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28 The flash location that's been chosen for Magnetite FFS on the Pirelli is
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29 0x02480000 through 0x025FFFFF, i.e., offsets 0x480000 through 0x5FFFFF in the
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30 second flash bank. Pirelli's official firmwares use this flash area as
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31 temporary storage during OTA (over-the-air, probably WLAN in this case) fw
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32 reloads and leave it untouched at all other times, therefore as long as you are
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33 not doing firmware reloads over WLAN while in the "official mode", you can use
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34 your Pirelli phone for FreeCalypso experiments via fc-xram and go back to the
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35 regular fw in between, and the Magnetite FFS in the flash will be preserved
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36 from one fc-xram session to the next, not disturbed by Pirelli's fw.
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37
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38 Compiling
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39 =========
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40
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41 We don't have a FreeCalypso firmware offering for the Pirelli that makes it
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42 work as an untethered phone, and probably never will: there is too much
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43 undocumented peripheral hardware in this phone. Instead a Pirelli phone
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44 running our FC Magnetite firmware will act as voice pseudo-modem: the LCD will
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45 stay dark and the buttons will do nothing, and you will need to control the GSM
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46 MS from your PC or other host system via AT commands.
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47
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48 As explained in the Voice-pseudo-modem article, the two most sensible firmware
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49 configurations (in the ./configure.sh sense) for VPM targets are hybrid-vpm and
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50 l1reconst-chg. Because of the huge RAM, you can also compile and run our more
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51 traditional configurations intended for proper modems like FCDEV3B (l1reconst,
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52 hybrid or hybrid-osl), but all data services functionality of those fw configs
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53 (CSD and GPRS) will remain inaccessible (dead weight) when running on the
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54 Pirelli. Furthermore, our FreeCalypso battery charging code is only included
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55 in the special hybrid-vpm and l1reconst-chg configs, not in the traditional
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56 ones.
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57
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58 Run './configure.sh pirelli l1reconst-chg' or
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59 './configure.sh pirelli hybrid-vpm' depending on which configuration you would
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60 like to play with, then run 'make ram' in the build directory created by the
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61 configure script - see the Compiling write-up for more details.
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62
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63 Running on the target
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64 =====================
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65
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66 1. Connect a USB cable from your GNU/Linux PC/laptop to the phone. If the
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67 phone was off but the battery is present, it will go through a charger-plug
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68 power-on event; if the flash contains Pirelli's original fw, it will boot in
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69 the charging mode. If the battery is not present, the Calypso won't power
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70 on (it needs VBAT and can't run on VCHG power instead), but the /dev/ttyUSBx
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71 device will still show up, as the CP2102 USB-serial chip inside the phone is
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72 powered strictly from the USB side.
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73
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74 2. Run a command like the following:
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75
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76 fc-xram -h pirelli /dev/ttyUSB0 ramimage.srec rvinterf
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77
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78 Adjust the paths to your /dev/ttyUSBx device and your ramimage.srec as
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79 appropriate, and add rvinterf logging or other options as desired.
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80 Specifying rvinterf on the fc-xram command line directs fc-xram to exec
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81 rvinterf and pass the serial channel to it immediately as soon as the code
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82 image has been loaded into target RAM and jumped to; this direct passing of
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83 the serial channel from fc-xram to rvinterf is appropriate because the
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84 loaded fw will immediately start emitting binary trace packets in TI's RVTMUX
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85 format.
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86
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87 3. Induce the phone to execute its Calypso boot path: if the battery was
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88 removed, insert it now; if Pirelli's regular fw is running, execute its
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89 power-off sequence.
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90
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91 Once the Calypso chip in the Pirelli phone executes its boot path with fc-xram
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92 running, the boot path will be diverted and our experimental firmware will be
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93 loaded into target device RAM and jumped to. Our fw will now run, and the
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94 rvinterf process on the host will maintain communication with it.
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95
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96 FFS initialization
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97 ==================
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98
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99 When our Magnetite firmware boots, it will examine the state of the flash
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100 sectors in the area we have allocated for our aftermarket FFS. If this flash
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101 area is completely blank the first time Magnetite boots, as it should be if you
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102 have a "virgin" Pirelli phone, the FFS code in our fw will automatically perform
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103 what TI called the "preformat" operation: write undifferentiated FFS block
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104 headers (0xBF in the flags byte) into each flash sector. However, it won't
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105 automatically perform the "format" operation - instead you'll need to run
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106 fc-fsio to do the format and to populate this FFS with some necessary content.
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107 If you are not sure of the state of the Magnetite FFS flash area on your
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108 Pirelli, you can also run fc-fsio to examine it - so run fc-fsio either way.
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109 Run fc-fsio WITHOUT -p: let it connect to the rvinterf process you should
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110 already have running from fc-xram.
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111
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112 [NOTE: you need to be running FreeCalypso host tools from the fc-host-tools-r5
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113 release or later; earlier versions of fc-fsio won't work as described.]
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114
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115 Once you are in fc-fsio, check the status of your FFS like this:
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116
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117 fsio> ls -l /
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118
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119 If the FFS is already formatted, you will get a listing of the root directory;
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120 if it is not formatted, you'll get an error like this:
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121
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122 opendir: FFS error 4 (EFFS_NOFORMAT: ffs not formatted)
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123
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124 To format and initialize your Pirelli Magnetite FFS, issue the following
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125 commands:
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126
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127 fsio> format /
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128 fsio> pirelli-magnetite-init
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129
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130 If you already have a formatted FFS from before, it is safe to rerun the
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131 pirelli-magnetite-init command, but not format. The format command will *not*
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132 work on an already formatted FFS; if you have a messed-up FFS and you would
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133 like to restart from a clean slate, erase the Magnetite FFS sectors with
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134 fc-loadtool:
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135
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136 loadtool> flash2 erase 480000 180000
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137
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138 Exercising the GSM functionality
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139 ================================
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140
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141 Once your FFS is good, open another terminal window on your driving PC/laptop
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142 and run fc-shell. This program will connect to the already running rvinterf
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143 process via a local socket, and it will enable you to send various commands to
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144 the running fw on the target, the most important ones being standard AT
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145 commands. Send the following sequence of AT commands to bring up GSM
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146 functionality:
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147
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148 AT+CMEE=2 -- enable verbose error responses
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149 AT+CFUN=1 -- enable radio and SIM interfaces
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150 AT+COPS=0 -- register to the default GSM network
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151
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152 When you are done playing with our experimental fw, you can either yank the
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153 battery and kill the host side rvinterf and fc-shell processes, or you can
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154 issue a 'tgtreset' command at the fc-shell prompt. The latter will cause the
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155 target to reset and boot back into its regular firmware.
511
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156
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157 A recent addition to our VPM firmware configuration is automatic power-off: if
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158 you simply disconnect USB while our FC Magnetite VPM fw is running, without
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159 issuing any tgtreset or poweroff commands and without yanking the battery, our
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160 firmware should detect the disconnection of USB and power off the phone within
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161 10 s.