FreeCalypso > hg > fc-tourmaline
annotate doc/C139-notes @ 288:25d3ee009d19
audio tone amplitudes: band-aid fix for FC Luna
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 13 Nov 2021 05:02:57 +0000 |
parents | a62e5bf88434 |
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rev | line source |
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a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
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1 FC Tourmaline firmware differs from Magnetite in two principal ways when it |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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2 comes to Mot C139 target support: |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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3 |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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4 * C139 LCD support is implemented in a more forward-looking manner: instead of |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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5 emulating TI's C-Sample at the lowest R2D driver level and therefore being |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
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changeset
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6 forever limited to 84x48 pixel display size, Tourmaline implements a new |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
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7 96x64 pixel framebuffer, matching the native LCD size of C1xx phones. The UI |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
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8 configuration is still black&white only though - the Mother of FreeCalypso |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
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changeset
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9 has no current plans to support color UI on smaller LCD sizes than TI's |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
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10 original 176x220 pix. |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
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changeset
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11 |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
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12 * Our aftermarket FFS configuration has been changed from 64x3 at 0x3C0000 to |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
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13 64x7 at 0x300000. Our earlier 64x3 config was chosen back in 2015, at that |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
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14 time we didn't know how much room we would end up needing for the firmware |
a62e5bf88434
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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15 image vs. how much FFS content we would eventually have, and this 64x3 config |
a62e5bf88434
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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16 is now deemed to be too small, allowing only one 64 KiB sector for FFS |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
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17 content. Our new FC Tourmaline aftermarket FFS config supports up to 320 KiB |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
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18 of FFS content, matches what we use on other platforms with 4 MiB flash chips, |
a62e5bf88434
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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19 leaves 3 MiB for the firmware image (our current smallbw UI fw is only 2 MiB), |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
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20 and still avoids intersection with Motorola's (or rather Compal's) original |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
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21 FFS, which is important for avoiding problems in converting C139 phones back |
a62e5bf88434
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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22 and forth between Motorola and FreeCalypso firmwares. |