FreeCalypso > hg > fc-selenite
annotate README @ 118:225e39652387
TMS470 build system: added m0-to-bin-c155
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Wed, 07 Nov 2018 06:18:05 +0000 |
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1 FreeCalypso Selenite is an experimental side branch off the mainline FC |
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2 Magnetite firmware. The principal changes from Magnetite are: |
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4 * Only modem functionality is supported. FC Magnetite includes TI's C-Sample | |
5 and D-Sample demo/prototype UI code and work in progress toward our own | |
6 FreeCalypso Libre Dumbphone; this code is not included and this functionality | |
7 is explicitly unsupported in Selenite. | |
8 | |
9 * Only the hybrid modem configuration is supported, using the new G23M PS and | |
10 ACI code from TCS3.2/LoCosto, not any of the legacy configurations that used | |
11 the blob-laden version from TCS211-20070608. | |
12 | |
13 * The old version of Nucleus used in TI's TCS211 program (binary sans source) | |
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14 has been replaced with FreeNucleus by XVilka. OSL (GPF to Nucleus glue layer) |
36 | 15 is the source-reconstructed version. |
16 | |
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17 * The tree layout and the build system are structured in such a way that it is |
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18 possible to build either with TI's original TMS470 compiler or with gcc. |
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19 |
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20 The purpose of this Selenite fw experiment is to see what will happen if we |
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21 take our full-featured hybrid modem fw as featured in Magnetite and compile it |
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22 with gcc instead of TI's original TMS470 compiler, which also implies swapping |
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23 in the new version of Nucleus and an entirely different implementation of all |
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24 assembly components and linker script magic. The current status is as follows: |
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25 |
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26 * When built with the original TMS470 compiler, the present Selenite fw appears |
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27 to perform no worse than Magnetite hybrid. |
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28 |
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29 * It is now possible to compile the full-featured fw with gcc without disabling |
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30 GPRS (no more crash on boot), but actually using GPRS doesn't work: pppd |
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31 establishes the point-to-point connection to the network's GGSN and gets an |
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32 IP address, but then trying to ping through this established connection causes |
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33 the fw to crash. |
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35 * Voice, SMS and CSD appear to work in the gcc-built version, but this firmware |
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36 is not as stable as Magnetite hybrid: I saw some occasional glitches which I |
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37 did not investigate further. |
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38 |
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39 Compared to FC Citrine (our previous attempt at gcc-built fw), the present |
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40 FC Selenite firmware built with gcc already offers the following: |
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41 |
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42 * CSD support; |
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43 |
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44 * Audio services: playing beeps and melodies through the DSP; |
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45 |
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46 * Newer code: FC Selenite branched off Magnetite in 2018-07, |
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47 whereas FC Citrine has been unmaintained since 2016-10. |
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48 |
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49 Because FC Selenite gcc already does everything that FC Citrine could do and |
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50 more, and is no less free, FC Citrine is now officially fully retired. |
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51 |
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52 As the next step, someone needs to do the work of tracking down and debugging |
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53 all of the issues seen in the gcc-built version, and make it work as well as |
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54 the original TMS470-built configuration. However, I (Mother Mychaela) am not |
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55 currently allocating my time toward that work because I see other directions |
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56 within the greater FreeCalypso family of projects as being more important. |
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57 Specifically, I see the following as much higher priorities compared to |
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58 gcc-built firmware: |
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59 |
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60 * Getting our FCDEV3B V2 boards made to prove my proposed fix for the sleep |
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61 mode bug, and if they work as expected, we'll need to make more FreeCalypso |
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62 modem hw in various form factors and put that hw into the hands of end users. |
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63 Software or firmware without hardware to run it on is useless no matter how |
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64 good or how free/libre it is, hence it makes no sense to me to worry whether |
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65 our fw is built with gcc or with TI's TMS470 compiler until the hardware |
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66 that's needed to run it is made in greater volume and placed into the hands |
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67 of people who would appreciate it. |
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68 |
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69 * Getting the digital voice channel over MCSI working, which is a prerequisite |
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70 before we can repackage our FreeCalypso modem into a module form factor which |
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71 could then be marketed to communities like Neo900 and Librem 5 as a drop-in |
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72 replacement for the 100% closed and proprietary modem modules they use |
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73 currently. |
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74 |
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75 * Building our long-planned FreeCalypso Libre Dumbphone hardware, so we can |
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76 have a complete phone without needing someone else like Neo900 or Librem 5 or |
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77 ZeroPhone to provide an application processor front-end to our modem. |
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78 |
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79 Anyone else who feels that whipping the gcc-built fw version into shape should |
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80 be a higher priority has two options: either do the work themselves (the code |
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81 is free for everyone), or pay Falconia Partners LLC to elevate the priority of |
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82 this gcc-built fw work. |