FreeCalypso > hg > freecalypso-sw
annotate doc/Pirelli-Howto @ 944:51f580665110
gsm-fw: C139 works with non-volatile FFS enabled
author | Mychaela Falconia <falcon@ivan.Harhan.ORG> |
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date | Sun, 01 Nov 2015 05:03:35 +0000 |
parents | 7c5b129573f6 |
children | 7d3f0910aeb2 |
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1 How to play with FreeCalypso GSM firmware on a Pirelli DP-L10 |
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2 ============================================================= |
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3 |
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4 Our experimental FC GSM fw can now run on the Pirelli DP-L10 target. Our fw |
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5 cannot yet operate this phone in a useful manner, i.e., it is not currently |
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6 possible to replace Pirelli's proprietary fw with ours and use the phone as an |
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7 end user. Our gsm-fw is close to having working voice call functionality when |
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8 controlled by an external host via AT commands, but we haven't even started |
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9 working on the on-board user interface part yet. |
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10 |
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11 One very useful special feature of the Pirelli DP-L10 is its very large RAM: |
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12 8 MiB. Having such large RAM allows us to run our experimental fw on this |
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13 target entirely from RAM, without touching the flash. When you compile a |
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14 FreeCalypso gsm-fw image for the Pirelli target, by default a ramImage will be |
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15 built instead of a flashImage. It is possible to build a flashable image of |
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16 the fw in the same configuration and program it into flash with fc-loadtool, |
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17 but doing so is not recommended: our current fw has no battery management code, |
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18 so the charging hardware circuit will never be enabled and the battery will |
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19 discharge even with a USB power source connected; keeping Pirelli's original |
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20 fw in flash will allow the phone to charge its battery and otherwise function |
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21 normally when you are not in the middle of a FreeCalypso firmware experiment. |
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22 |
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23 If you are ready to play with our experimental GSM pseudo-modem fw on your |
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24 Pirelli, the steps are as follows: |
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25 |
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26 1. Build the firmware in the pirelli-gsm configuration - see the Compiling |
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27 document for more details. |
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28 |
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29 2. Connect a USB cable from your GNU/Linux PC/laptop to the phone. If the |
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30 phone was off but the battery is present, it will go through a charger-plug |
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31 power-on event; if the flash contains Pirelli's original fw, it will boot in |
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32 the charging mode. If the battery is not present, the Calypso won't power |
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33 on (it needs VBAT and can't run on VCHG power instead), but the /dev/ttyUSBx |
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34 device will still show up, as the CP2102 USB-serial chip inside the phone is |
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35 powered strictly from the USB side. |
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36 |
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37 3. Run a command like the following: |
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38 |
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39 fc-xram -h pirelli /dev/ttyUSB0 finlink/ramImage.srec rvinterf |
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40 |
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41 Adjust the paths to your /dev/ttyUSBx device and your ramImage.srec as |
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42 appropriate, and add rvinterf logging or other options as desired. |
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43 Specifying rvinterf on the fc-xram command line directs fc-xram to exec |
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44 rvinterf and pass the serial channel to it immediately as soon as the code |
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45 image has been loaded into target RAM and jumped to; this direct passing of |
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46 the serial channel from fc-xram to rvinterf is appropriate because the |
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47 loaded fw will immediately start emitting binary trace packets in TI's RVTMUX |
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48 format. |
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49 |
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50 4. Induce the phone to execute its Calypso boot path: if the battery was |
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51 removed, insert it now; if Pirelli's regular fw is running, execute its |
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52 power-off sequence. |
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53 |
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54 Once the Calypso chip in the Pirelli phone executes its boot path with fc-xram |
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55 running, the boot path will be diverted and our experimental firmware will be |
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56 loaded into target device RAM and jumped to. Our fw will now run, and the |
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57 rvinterf process on the host will maintain communication with it. |
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58 |
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59 To exercise our firmware further, you will need to open another terminal window |
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60 on your driving PC/laptop and run fc-shell. This program will connect to the |
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61 already running rvinterf process via a local socket, and it will enable you to |
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62 send various commands to the running fw on the target, the most important ones |
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63 being standard AT commands. Send the following sequence of AT commands to |
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64 bring up GSM functionality: |
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65 |
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66 AT%SLEEP=2 -- disable deep sleep (doesn't work yet) |
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67 AT+CMEE=2 -- enable verbose error responses |
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68 AT+CFUN=1 -- enable radio and SIM interfaces |
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69 AT+COPS=0 -- register to the default GSM network |
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70 |
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71 Our fw is currently able to exercise all SIM interface functions (at least the |
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72 obvious ones which I've tested), register with a live commercial GSM network |
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73 using a legitimate SIM, and send and receive SMS using standard GSM 07.05 AT |
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74 commands. Voice calls don't work yet; dialing a MO call with the ATD command |
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75 or placing a MT call to the device under test from the network side results in |
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76 the firmware going haywire. The latter misbehaviour is next to be investigated |
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77 and (hopefully) fixed. |
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78 |
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79 When you are done playing with our experimental fw, you can either yank the |
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80 battery and kill the host side rvinterf and fc-shell processes, or you can |
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81 issue a 'tgtreset' command at the fc-shell prompt. The latter will cause the |
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82 target to reset and boot back into its regular firmware. |