FreeCalypso > hg > fc-selenite
annotate README @ 187:d05fb947b50d
src/cs: sync with Magnetite
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 15 Feb 2020 20:23:30 +0000 |
parents | d9926aabf13f |
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rev | line source |
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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: |
36 | 3 |
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 | |
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13 * Only the "new" Calypso+RF chipset is supported, i.e., Calypso C035, DSP ROM |
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14 version 36, Rita RF - no support for historical Calypso silicon versions or |
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15 older RF chips. |
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16 |
36 | 17 * The old version of Nucleus used in TI's TCS211 program (binary sans source) |
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18 has been replaced with FreeNucleus by XVilka. OSL (GPF to Nucleus glue layer) |
36 | 19 is the source-reconstructed version. |
20 | |
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21 * The tree layout and the build system are structured in such a way that it is |
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22 possible to build either with TI's original TMS470 compiler or with gcc. |
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23 |
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24 The purpose of this Selenite fw experiment is to see what will happen if we |
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25 take our full-featured hybrid modem fw as featured in Magnetite and compile it |
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26 with gcc instead of TI's original TMS470 compiler, which also implies swapping |
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27 in the new version of Nucleus and an entirely different implementation of all |
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28 assembly components and linker script magic. The current status is as follows: |
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29 |
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30 * When built with the original TMS470 compiler, the present Selenite fw appears |
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31 to perform no worse than Magnetite hybrid. |
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32 |
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33 * It is now possible to compile the full-featured fw with gcc without disabling |
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34 GPRS (no more crash on boot), but actually using GPRS doesn't work: pppd |
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35 establishes the point-to-point connection to the network's GGSN and gets an |
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36 IP address, but then trying to ping through this established connection causes |
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37 the fw to crash. |
36 | 38 |
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39 * Voice, SMS and CSD appear to work in the gcc-built version, but this firmware |
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40 is not as stable as Magnetite hybrid: I saw some occasional glitches which I |
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41 did not investigate further. |
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42 |
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43 Compared to FC Citrine (our previous attempt at gcc-built fw), the present |
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44 FC Selenite firmware built with gcc already offers the following: |
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45 |
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46 * CSD support; |
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47 |
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48 * Audio services: playing beeps and melodies through the DSP; |
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49 |
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50 * Newer code: FC Selenite branched off Magnetite in 2018-07 and is being |
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51 periodically synced with new Magnetite developments, whereas FC Citrine |
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52 has been unmaintained since 2016-10. |
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53 |
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54 Because FC Selenite gcc already does everything that FC Citrine could do and |
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55 more, and is no less free, FC Citrine is now officially fully retired. |
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56 |
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57 As the next step, someone needs to do the work of tracking down and debugging |
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58 all of the issues seen in the gcc-built version, and make it work as well as |
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59 the original TMS470-built configuration. However, I (Mother Mychaela) am not |
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60 currently willing to work in that direction until and unless we recover some |
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61 original authentic versions of os_???.c and osx.c modules - the reconstructions |
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62 from 2014 which are used in the present FC Selenite experimental source tree |
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63 (same as Citrine) aren't good enough. |