FreeCalypso > hg > freecalypso-tools
annotate doc/Pirelli-loadtools-entry @ 968:ec736c59845c
fcup-smsendmult: support -e like plain fcup-smsend
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 01 Sep 2023 17:32:54 +0000 |
parents | 803e926e0699 |
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doc/Pirelli-loadtools-entry: new article
Mychaela Falconia <falcon@freecalypso.org>
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1 Pirelli DP-L10 phone is a quirky Calypso target in that the same hardware |
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doc/Pirelli-loadtools-entry: new article
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2 interface (USB) that provides access to the one easily accessible Calypso UART |
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doc/Pirelli-loadtools-entry: new article
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3 also feeds charging power to the phone. The result of this arrangement is that |
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doc/Pirelli-loadtools-entry: new article
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4 whenever you connect your phone to your computer for communication, programming |
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doc/Pirelli-loadtools-entry: new article
Mychaela Falconia <falcon@freecalypso.org>
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5 or tinkering, the charging voltage is always present and the Calypso+Iota |
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doc/Pirelli-loadtools-entry: new article
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6 chipset never enters switched-off state: every "soft poweroff" operation is |
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doc/Pirelli-loadtools-entry: new article
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7 converted by the hardware into a deep reboot. |
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doc/Pirelli-loadtools-entry: new article
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8 |
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Mychaela Falconia <falcon@freecalypso.org>
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9 You can force a "cold programming boot" cycle on your Pirelli phone by removing |
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doc/Pirelli-loadtools-entry: new article
Mychaela Falconia <falcon@freecalypso.org>
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10 the battery, connecting USB to the "debattered" phone, running fc-loadtool on |
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doc/Pirelli-loadtools-entry: new article
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11 the ttyUSB device that appears, and then inserting the battery in one swift |
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12 motion - this sequence will be necessary if you brick your flash and need to |
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doc/Pirelli-loadtools-entry: new article
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13 unbrick it - but of course it is hugely inconvenient for ordinary FreeCalypso |
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doc/Pirelli-loadtools-entry: new article
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14 tinkering (such as running FreeCalypso VPM firmware builds via fc-xram), and |
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doc/Pirelli-loadtools-entry: new article
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15 doing it too often will ruin battery spring contacts. The other alternative is |
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doc/Pirelli-loadtools-entry: new article
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16 to let Pirelli's official fw boot fully (including GSM network registration) in |
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doc/Pirelli-loadtools-entry: new article
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17 between cycles of fc-loadtool or fc-xram, and then do the switch-off operation |
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doc/Pirelli-loadtools-entry: new article
Mychaela Falconia <falcon@freecalypso.org>
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18 from the UI (press and hold red button on unlocked home screen) with fc-loadtool |
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doc/Pirelli-loadtools-entry: new article
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19 or fc-xram running. But this option is also unattractive, as it involves |
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doc/Pirelli-loadtools-entry: new article
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20 unwanted SIM bring-up and GSM network registration from Pirelli's fw. |
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21 |
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22 As of fc-host-tools-r19 we have an improved solution in the form of -Petmoff |
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doc/Pirelli-loadtools-entry: new article
Mychaela Falconia <falcon@freecalypso.org>
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23 option to fc-loadtool, fc-xram, fc-simint etc. The usage scenario is as |
803e926e0699
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24 follows: |
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25 |
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26 * The phone needs to be in its "booted for charging only" state. With Pirelli's |
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Mychaela Falconia <falcon@freecalypso.org>
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27 official fw, this state is entered when you connect USB to a switched-off |
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doc/Pirelli-loadtools-entry: new article
Mychaela Falconia <falcon@freecalypso.org>
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28 phone, or when you execute the switch-off sequence from the UI with USB |
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29 connected. |
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30 |
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31 * In this state, you issue a command like the following: |
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32 |
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33 fc-loadtool -h pirelli -Petmoff /dev/ttyUSB0 |
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34 |
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35 or |
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36 |
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37 fc-simint -h pirelli -Petmoff /dev/ttyUSB0 |
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38 |
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39 or |
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40 |
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41 fc-xram -h pirelli -Petmoff /dev/ttyUSB0 ramimage.srec rvinterf |
803e926e0699
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42 |
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43 etc |
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44 |
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45 This -Petmoff option (implemented as part of our generic boot control framework, |
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doc/Pirelli-loadtools-entry: new article
Mychaela Falconia <falcon@freecalypso.org>
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46 see Target-boot-control article) tells loadtools programs to send an ETM ABB |
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47 write (abbw) command to the target serial port, issuing a DEVOFF write to the |
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48 VRPCDEV register, just before going into the loop that sends beacons aiming to |
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49 interrupt the boot process at the Calypso boot ROM. This trick works because |
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doc/Pirelli-loadtools-entry: new article
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50 Pirelli's official fw implements a TI-standard RVTMUX interface on the Calypso |
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51 IrDA UART behind USB, complete with ETM, and with USB applying VCHG to Iota |
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52 VRPC, the DEVOFF operation (soft poweroff) turns into a deep reboot. |
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53 |
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54 Running loadtools programs with -Petmoff against a Pirelli phone that is fully |
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55 booted, as opposed to "booted for charging only" state, is possible but not |
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56 recommended: it will forcibly kill the running firmware without any kind of |
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57 clean shutdown. Strictly speaking, this option always effects the just- |
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58 described forced firmware kill, no matter which state the official fw happens |
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59 to be in, but if the fw is in its "booted for charging only" state, then there |
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60 are no ill effects to be concerned with. |
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61 |
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62 When fc-loadtool or fc-simint/fc-simtool finishes with a clean exit, or when a |
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63 RAM-based firmware session started with fc-xram is cleanly finished with |
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64 fc-shell poweroff, the phone returns to the same "booted for charging only" |
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65 state. Therefore, multiple operations of fc-loadtool, fc-simtool or fc-xram, |
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66 each with -Petmoff option, may be performed back to back, just like how a |
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67 FreeCalypso developer using a proper FC dev board would run back-to-back |
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68 sessions starting with -Pdtr or -Prts and ending with Iota poweroff. |