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annotate doc/FCDEV3B-751774 @ 701:35e7f9d0379f

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targets: add TARGET_HAS_BUZZER to c11x, c139 and dsample This new target config preprocessor symbol was introduced in Tourmaline in connection with the new approach to playing buzzer melodies via PWT, properly omitting the responsible code on targets where BU output controls the vibrator instead. That code is not present in Magnetite and we have no plans to backport it here, but target header files should be kept consistent between the two trees, especially given that we plan to support FC Venus target in Magnetite.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 26 Mar 2022 19:51:34 +0000
parents 9f19cc5e46e8
children
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1 We have one experimental FCDEV3B V2 board on which our regular Calypso chip
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2 ([P]D751992AGHH) has been replaced with D751774AGHH, an earlier F-number
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3 featuring DSP ROM version 3416 rather than the final version 3606 which we
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4 normally work with. Both chip versions are Calypso C035 variants (ARM7 running
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5 at 52 MHz, DSP running at 104 MHz), and both include AMR support - but there
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6 must have been some issue with DSP version 34 (and maybe version 35 used in
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7 Calypso+) that compelled TI to produce the newer and final version 36 which we
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8 are most familiar with.
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9
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10 Our Layer1 code is based on TI's TCS211-20070608 semi-src release (which we have
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11 reconstructed back to full source), and it officially supports only DSP 36.
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12 However, our FC Magnetite firmware can also be built for DSP 34 targets (see
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13 the Calypso-version-override article), in which case we use a monolithic DSP
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14 patch (no L1_DYN_DSP_DWNLD) extracted from the TSM30 source. The patch version
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15 is 4130.
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16
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17 The configure.sh target name for this special modified board is fcdev3b-dsp34
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18 instead of just fcdev3b, and the two firmware builds are not interchangeable:
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19 the regular fcdev3b build goes into regular FCDEV3B boards, the special
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20 fcdev3b-dsp34 build goes into the special FCDEV3B-751774 board. However, when
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21 running its respective build this DSP 34 board appears to function just as well
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22 as our regular DSP 36 targets: standalone RF tests work, DSP-based audio
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23 services (beeps and Melody E1) work, connecting to a live GSM network worked,
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24 a few test voice calls worked, all of them connected in AMR mode, voice passed
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25 successfully in both directions.
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26
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27 Going forward, we shall continue using D751992AGHH chips with DSP ROM version
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28 3606 as our regular platform, but it is nice to know that the earlier DSP 34
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29 apparently works too.