view bwsplash/README @ 275:79cfefc1e2b4

audio mode load: gracefully handle mode files of wrong AEC version Unfortunately our change of enabling L1_NEW_AEC (which is necessary in order to bring our Calypso ARM fw into match with the underlying DSP reality) brings along a change in the audio mode file binary format and file size - all those new tunable AEC parameters do need to be stored somewhere, after all. But we already have existing mode files in the old format, and setting AEC config to garbage when loading old audio modes (which is what would happen without the present change) is not an appealing proposition. The solution implemented in the present change is as follows: the audio mode loading code checks the file size, and if it differs from the active version of T_AUDIO_MODE, the T_AUDIO_AEC_CFG structure is cleared - set to the default (disabled AEC) for the compiled type of AEC. We got lucky in that this varying T_AUDIO_AEC_CFG structure sits at the end of T_AUDIO_MODE!
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 30 Jul 2021 02:55:48 +0000
parents a963d8cd8682
children
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When TI's original version of small B&W UI firmware boots or shuts down, the
splash screen it displays consists of a 56x38 pixel B&W TI logo centered in the
middle of the LCD.  (Back when this code was owned by Condat rather than TI,
this splash screen was an animated Condat logo of approximately the same size -
it is still present in the code, conditioned out.)  Because we are FreeCalypso
and not TI or Condat, we need our own logo or at least our own splash screen to
replace those other company logos.

A bona fide FreeCalypso logo does not exist yet as of this writing (2021-03),
and while we (Falconia family that owns FC) do have some logo ideas in the
works, the 96x64 pixel B&W (1bpp) framebuffer in the FreeCalypso Lite config is
far too limited compared to other media - hence we are currently going for a
simple splash screen that merely consists of the words "FreeCalypso Lite".

The current version of our minimal-effort splash screen is 80x30 pixels, to be
centered in the middle of the 96x64 pixel LCD.  The bitmap drawing is given in
bwsplash.pbm, which is a Plain PBM file, making the pixel image directly
viewable and editable in vi.  The tools in this directory compile it into hex
bytes for inclusion in C source, and the finished artifact goes into
src/ui/bmi/mmiIcons.c, fc_splash_screen_smallbw[] char array.  The coordinates
for positioning this bitmap within the full 96x64 pixel framebuffer are given
in src/ui/bmi/mmiResources.h - look for WELCOME_ANI_POS_X and WELCOME_ANI_POS_Y
definitions.

The present splash screen is strictly a minimal-effort job with absolutely no
quality claims of any kind.  If someone is more graphically talented than I am,
or has more time to invest into drawing a prettier splash screen, suggestions
for improvement are always welcome.