FreeCalypso > hg > fc-magnetite
view doc/FCDEV3B-751774 @ 700:800bf29abf31
audio mode load change from Tourmaline
Our FreeCalypso universe now has two kinds of audio mode config files:
the old 164 byte kind and the new 176 byte kind. We are not enabling
L1_NEW_AEC in Magnetite, only in Tourmaline, thus 164 byte audio mode
files are still native to Magnetite. But we still desire graceful
handling of the situation when a running Magnetite fw may load a
176 byte audio mode file (presumably with new AEC config), thus we
incorporate the same audio mode loading change which we implemented
in Tourmaline: if the loaded audio mode file is of the wrong kind,
the AEC config is cleared to default disabled state.
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Fri, 30 Jul 2021 03:55:52 +0000 |
| parents | 9f19cc5e46e8 |
| children |
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We have one experimental FCDEV3B V2 board on which our regular Calypso chip ([P]D751992AGHH) has been replaced with D751774AGHH, an earlier F-number featuring DSP ROM version 3416 rather than the final version 3606 which we normally work with. Both chip versions are Calypso C035 variants (ARM7 running at 52 MHz, DSP running at 104 MHz), and both include AMR support - but there must have been some issue with DSP version 34 (and maybe version 35 used in Calypso+) that compelled TI to produce the newer and final version 36 which we are most familiar with. Our Layer1 code is based on TI's TCS211-20070608 semi-src release (which we have reconstructed back to full source), and it officially supports only DSP 36. However, our FC Magnetite firmware can also be built for DSP 34 targets (see the Calypso-version-override article), in which case we use a monolithic DSP patch (no L1_DYN_DSP_DWNLD) extracted from the TSM30 source. The patch version is 4130. The configure.sh target name for this special modified board is fcdev3b-dsp34 instead of just fcdev3b, and the two firmware builds are not interchangeable: the regular fcdev3b build goes into regular FCDEV3B boards, the special fcdev3b-dsp34 build goes into the special FCDEV3B-751774 board. However, when running its respective build this DSP 34 board appears to function just as well as our regular DSP 36 targets: standalone RF tests work, DSP-based audio services (beeps and Melody E1) work, connecting to a live GSM network worked, a few test voice calls worked, all of them connected in AMR mode, voice passed successfully in both directions. Going forward, we shall continue using D751992AGHH chips with DSP ROM version 3606 as our regular platform, but it is nice to know that the earlier DSP 34 apparently works too.