FreeCalypso > hg > fc-tourmaline
view doc/C139-notes @ 287:3dee79757ae4
UI fw: load handheld audio mode on boot
We have now reached the point where use of audio mode config files
should be considered mandatory. In ACI usage we can tell users that
they need to perform an AT@AUL of some appropriate audio mode, but
in UI-enabled fw we really need to have the firmware load audio modes
on its own, so that correct audio config gets established when the
handset or development board runs on its own, without a connected host
computer.
Once have FC Venus with both main and headset audio channels and
headset plug insertion detection, our fw will need to automatically
load the handheld mode or the headset mode depending on the plug
insertion state. For now we load only the handheld mode, which has
been tuned for FC-HDS4 on FC Luna.
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 13 Nov 2021 03:20:57 +0000 |
parents | a62e5bf88434 |
children |
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FC Tourmaline firmware differs from Magnetite in two principal ways when it comes to Mot C139 target support: * C139 LCD support is implemented in a more forward-looking manner: instead of emulating TI's C-Sample at the lowest R2D driver level and therefore being forever limited to 84x48 pixel display size, Tourmaline implements a new 96x64 pixel framebuffer, matching the native LCD size of C1xx phones. The UI configuration is still black&white only though - the Mother of FreeCalypso has no current plans to support color UI on smaller LCD sizes than TI's original 176x220 pix. * Our aftermarket FFS configuration has been changed from 64x3 at 0x3C0000 to 64x7 at 0x300000. Our earlier 64x3 config was chosen back in 2015, at that time we didn't know how much room we would end up needing for the firmware image vs. how much FFS content we would eventually have, and this 64x3 config is now deemed to be too small, allowing only one 64 KiB sector for FFS content. Our new FC Tourmaline aftermarket FFS config supports up to 320 KiB of FFS content, matches what we use on other platforms with 4 MiB flash chips, leaves 3 MiB for the firmware image (our current smallbw UI fw is only 2 MiB), and still avoids intersection with Motorola's (or rather Compal's) original FFS, which is important for avoiding problems in converting C139 phones back and forth between Motorola and FreeCalypso firmwares.