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annotate compal/audio/reg-read-guide @ 381:ca75ac283888

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compal/audio: analysis of handheld mode omr readouts made by Das Signal
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 09 Nov 2021 18:49:09 +0000
parents 34490934ff02
children
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34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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1 Here is an idea - what if we break into a running C139 phone fw with tfc139,
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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2 then run fc-loadtool as usual, but instead of operating on the flash, use
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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3 r16 and abbr commands inside fc-loadtool to read out various audio config
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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4 settings established by the official fw? Specifically use r16 to read out
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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5 some DSP API words (AEC and FIR blocks), and use abbr to read Iota ABB
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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6 registers dealing with audio. Why do we need to go this convoluted route
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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7 with tfc139 break-in followed by fc-loadtool, why not some easier way?
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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8 Answer: C139 and other C1xx firmwares don't have ETM (thus no r16 and
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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9 certainly no high-level aur operations), they do implement the old TM3
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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10 protocol which we use to break in, but their implementation of oabbr is
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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11 broken, returns garbage.
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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12
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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13 DSP NDB start address is 0xFFD001A8, contains AEC control words
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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14
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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15 d_aec_ctrl should be at 0xFFD001A8 + 0x90 = 0xFFD00238
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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16
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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17 the 8 words starting with d_cont_filter should be at
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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18 0xFFD001A8 + 0x6A2 = 0xFFD0084A
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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19
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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20 DSP PARAM start address is 0xFFD00862, contains FIR coefficients
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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21
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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22 UL FIR coefficients: 31 words starting at 0xFFD00862 + 0xA6 = 0xFFD00908
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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23 DL FIR coefficients: 31 words starting at 0xFFD00862 + 0xE4 = 0xFFD00946
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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24
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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25 Iota ABB registers of interest:
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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26
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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27 VBCTRL1: abbr 1 8
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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28 VBCTRL2: abbr 1 11
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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29 VBPOP: abbr 1 10
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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30 VBUCTRL: abbr 1 7
34490934ff02 compal/audio/reg-read-guide written
Mychaela Falconia <falcon@freecalypso.org>
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31 VBDCTRL: abbr 0 6