FreeCalypso > hg > tcs211-c139

annotate README @ 40:58d50d1f238d

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band-aid fix in ETM for the crash on boot (race condition)
author Mychaela Falconia <falcon@ivan.Harhan.ORG>
date Thu, 05 Nov 2015 01:31:02 +0000
parents 132b3e230631
children 52325cb524a8
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132b3e230631 README written for tcs211-c139
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parents: 13
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1 This semi-source tree contains a hacked version of TI's TCS211 firmware that
132b3e230631 README written for tcs211-c139
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parents: 13
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2 has been made to run on the Motorola C139. The UI part of TI's reference fw
132b3e230631 README written for tcs211-c139
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents: 13
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3 has not been ported over yet, hence the version presented here currently builds
132b3e230631 README written for tcs211-c139
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parents: 13
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4 and works only in the modem-like ACI configuration, i.e., control via AT
132b3e230631 README written for tcs211-c139
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parents: 13
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5 commands only.
132b3e230631 README written for tcs211-c139
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6
132b3e230631 README written for tcs211-c139
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7 TI's original fw was/is designed to make use of two UARTs, one for the classic
132b3e230631 README written for tcs211-c139
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents: 13
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8 AT command interface and the other for their RVTMUX debug/calibration/etc
132b3e230631 README written for tcs211-c139
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parents: 13
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9 interface. Unfortunately though, our present target hw has only one UART
132b3e230631 README written for tcs211-c139
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents: 13
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10 practically accessible (Calypso's MODEM UART brought out on the headset jack),
132b3e230631 README written for tcs211-c139
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parents: 13
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11 thus the classic AT command interface had to be sacrificed. Instead the AT
132b3e230631 README written for tcs211-c139
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents: 13
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12 command interface (which is currently the only way to control the GSM
132b3e230631 README written for tcs211-c139
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents: 13
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13 functionality in the absence of a UI ported to the present target) needs to be
132b3e230631 README written for tcs211-c139
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents: 13
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14 accessed through the RVTMUX binary packet interface using FreeCalypso host
132b3e230631 README written for tcs211-c139
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parents: 13
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15 tools rvinterf and fc-shell.
132b3e230631 README written for tcs211-c139
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16
132b3e230631 README written for tcs211-c139
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17 The present fw has been built from a semi-src (half source, half binary objects)
132b3e230631 README written for tcs211-c139
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents: 13
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18 TI firmware release which was made for some manufacturer that made GSM/GPRS
132b3e230631 README written for tcs211-c139
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents: 13
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19 modems, rather than voice handsets, hence the present configuration is
132b3e230631 README written for tcs211-c139
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents: 13
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20 unfortunately highly suboptimal for our use case. The entire mass of code
132b3e230631 README written for tcs211-c139
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parents: 13
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21 supporting CSD, fax and GPRS data services is included and cannot be removed
132b3e230631 README written for tcs211-c139
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents: 13
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22 because that part of the fw is in binary blobs, but all this code is pure dead
132b3e230631 README written for tcs211-c139
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parents: 13
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23 weight in the present configuration: the phone UI layer (when we get around to
132b3e230631 README written for tcs211-c139
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parents: 13
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24 porting it) won't make any use of data functionality (nowhere near enough
132b3e230631 README written for tcs211-c139
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents: 13
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25 resources on this hw to implement a WAP browser or MMS), and because we had to
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26 give up the standard AT command channel, the option of having the phone dual-
132b3e230631 README written for tcs211-c139
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parents: 13
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27 function as a laptop-tethered modem is not available either.
132b3e230631 README written for tcs211-c139
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28
132b3e230631 README written for tcs211-c139
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29 Building the present firmware from semi-source requires using a Wine environment
132b3e230631 README written for tcs211-c139
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parents: 13
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30 to run TI's proprietary compiler toolchain and other build tools which exist
132b3e230631 README written for tcs211-c139
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parents: 13
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31 only as M$ Windows binaries. The necessary environment can be downloaded here:
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32
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33 ftp://ftp.freecalypso.org/pub/GSM/TI_src/wine/
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34
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35 You will also need the mokosrec2bin utility, which is needed for one of the
132b3e230631 README written for tcs211-c139
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parents: 13
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36 finishing steps in generating an image that can be usefully flashed into a C139:
132b3e230631 README written for tcs211-c139
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37
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38 ftp://ftp.freecalypso.org/pub/GSM/GTA02/gsm-fw/mokosrec2bin.c
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40 Once you have the necessary build tools installed, you should be able to
132b3e230631 README written for tcs211-c139
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents: 13
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41 compile the present fw by running first winebuild.sh, then copyout.sh in the
132b3e230631 README written for tcs211-c139
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents: 13
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42 g23m subdirectory. Then you can flash this firmware you just built into an
132b3e230631 README written for tcs211-c139
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parents: 13
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43 actual C139 phone with FreeCalypso host tool fc-loadtool. Flash sector 0 (the
132b3e230631 README written for tcs211-c139
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44 brickable boot sector) needs to contain our patched bootloader version
132b3e230631 README written for tcs211-c139
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parents: 13
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45 compal-flash-boot-for-fc.bin (this brickable sector only needs to be rewritten
132b3e230631 README written for tcs211-c139
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46 once when first installing some FreeCalypso fw on the phone; no need to touch
132b3e230631 README written for tcs211-c139
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parents: 13
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47 this dangerous sector on subsequent updates from one FC fw version to another),
132b3e230631 README written for tcs211-c139
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48 and the main fw image needs to be flashed starting at 0x10000. The image to
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49 flash is aci-build.progbin - it has TI's bootloader code stripped off, as we
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parents: 13
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50 are using compal-flash-boot-for-fc instead.
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51
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52 The phones in question have a data structure in flash at 0x3FC000 (in an 8 KiB
132b3e230631 README written for tcs211-c139
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53 short sector) that must contain factory programming, including each phone's
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54 unique IMEI and RF calibration values. However, we don't understand how to
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parents: 13
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55 grok this data structure. Therefore, our firmware features the following
132b3e230631 README written for tcs211-c139
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parents: 13
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56 points of inconvenience:
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57
132b3e230631 README written for tcs211-c139
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58 * You have to set your own IMEI. It's entirely up to you whether you set the
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parents: 13
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59 same IMEI as the phone had originally or a different one, but our fw has no
132b3e230631 README written for tcs211-c139
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parents: 13
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60 way of reading the original from Mot/Compal's factory flash programming.
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61 You probably won't be able to connect to a live commercial GSM network until
132b3e230631 README written for tcs211-c139
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62 you set some IMEISV which the network will accept as valid.
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63
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64 * Because Mot/Compal stored their RF calibration values in some format
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parents: 13
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65 (different from TI's) which we can't grok, a phone running our aftermarket fw
132b3e230631 README written for tcs211-c139
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parents: 13
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66 will run UNCALIBRATED. It may have difficulty connecting to networks if it
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parents: 13
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67 can't acquire the frequency burst lacking VCXO calibration, and the Tx power
132b3e230631 README written for tcs211-c139
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parents: 13
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68 levels are almost certainly wrong (out of spec) - BEWARE!
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69
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70 * Our fw does not even know whether your C139 is the 900+1800 MHz version or
132b3e230631 README written for tcs211-c139
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parents: 13
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71 850+1900 MHz. You will need to set the correct rfcap configuration at the
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72 same time when you set your IMEISV.
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73
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74 Flashing and usage instructions
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75 ===============================
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76
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77 If you are not scared off by all of the above and you still wish to try this
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78 experimental fw on your C139, you can install it as follows:
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79
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80 1. Connect to the phone with fc-loadtool, preceded by tfc139 if necessary -
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81 see loadtools documentation.
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82
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83 2. If the C139 in question does not already have some other FreeCalypso fw
132b3e230631 README written for tcs211-c139
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parents: 13
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84 version in its flash, replace the bootloader:
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85
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86 loadtool> flash erase-program-boot compal-flash-boot-for-fc.bin
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87
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88 3. Flash the main fw image:
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89
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90 loadtool> flash erase 10000 220000
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91 loadtool> flash program-bin 10000 aci-build.progbin
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92
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93 (If your serial cable setup supports the special GSM high baud rates,
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94 you can speed the process up by issuing a baud 406250 or baud 812500
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95 command first.)
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96
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97 4. Erase the sectors where our firmware's non-volatile flash file system
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98 (aftermarket FFS configuration) will reside:
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99
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100 loadtool> flash erase 3C0000 30000
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101
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102 5. Cleanly end your fc-loadtool session, which will power the phone off:
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103
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104 loadtool> exit
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105
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106 Now your phone has FreeCalypso firmware in its flash, but it no longer works
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107 as a "normal" phone. Gotchas to be aware of:
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108
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109 * Mot/Compal's original firmwares (like all other production phone fws)
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110 implement on a guard on the power-on button: you have to hold it down for a
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111 little while to confirm that you really mean to power the phone on; a
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112 momentary press of the power-on button is interpreted as spurious by standard
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113 fws, and they power the phone back off. However, the present hack-fw has no
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114 such guard, hence even a momentary press of the power-on button will launch
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115 the firmware into full boot.
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116
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117 * Because our present fw has no UI, the LCD will remain dark and the buttons
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118 won't do anything. A momentary press of the power button will turn the phone
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119 on, but you won't know that it's on - it will just silently and invisibly eat
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120 the battery. Furthermore, the only way to power it off (aside from yanking
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121 the battery) is to connect a serial cable and send a poweroff command via
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122 fc-shell - there is no way to command a power-off from the keypad. (Pressing
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123 and holding the power button produces some kind of hang or crash - to be
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124 investigated - instead of a proper power-off.)
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125
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126 * The present fw includes TI's LCC (low-cost charger) code that came with
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127 TCS211, but it is not clear whether or not this code drives the charging
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128 circuitry correctly for Mot/Compal's hardware. Therefore, plan on having
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129 the phone with FC firmware draining batteries only, and have another phone
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130 running official fw (or a standalone charger) to charge them back up.
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131
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132 What all of these gotchas practically mean is that the phone with FC fw in it
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133 should not have a battery inserted on a regular basis; instead you should use
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134 it as follows:
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135
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136 1. Begin each FC hacking session by inserting the SIM you wish to use, then
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137 inserting the battery - but don't touch the power button yet.
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138
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139 2. Connect the serial cable and run rvinterf on your host.
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140
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141 3. Press the power button, and see the firmware boot output in the rvinterf
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142 window.
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143
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144 4. Run fc-shell, fc-fsio, fc-tmsh etc as desired during your hacking session.
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145
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146 5. End the session by yanking the battery, killing rvinterf and stowing away
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147 your serial cable.
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148
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149 First session
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150 =============
13
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151
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152 Remember the notes above regarding this fw not being able to read the factory
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153 IMEI record? That's right, you'll need to set your own IMEISV. Furthermore,
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154 because we are using our own "aftermarket" FFS configuration for non-volatile
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155 data storage (you erased the flash sectors to be used for this FFS when you
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156 flashed the fw with fc-loadtool, or at least you should have), this FFS needs
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157 to be initialized before the fw can function correctly.
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158
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159 Initialize your FFS as follows:
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160
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161 1. Connect the serial cable, run rvinterf and boot the fw as above.
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162
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163 2. Before you try issuing any AT commands via fc-shell, run fc-fsio first.
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164
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165 3. Initialize the FFS via fc-fsio as follows:
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166
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167 fsio> format /
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168 fsio> mk-std-dirs
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169 fsio> set-imeisv fc XXXXXXXX-YYYYYY-ZZ (punctuation optional, place anywhere)
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170 fsio> set-rfcap dual-eu (if you have 900+1800 MHz hardware)
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171 or
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172 fsio> set-rfcap dual-us (if you have 850+1900 MHz hardware)
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173
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174 After the above steps, you can exit fc-fsio (or leave it running), run fc-shell
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175 and exercise the GSM MS via AT commands - try connecting to a network! With my
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176 US band C139 (former Tracfone, now a Crackfone) on Operator 310260's network,
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177 both voice calls and SMS work like a charm. YMMV.