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pelgraine
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SOUND (Max, ES8311; Pro stays silent)
- minigb_apu vendored from Meck-P4 (MIT), run at 22050 Hz: at 44100 it
cost 3.6-4.0 ms of the 16.7 ms frame and the game fell to 0.98x, which
drained the DMA queue and glitched. Per-frame timings (core / apu /
i2s wait) now print with the speed line.
- Bring-up reuses the notification-tone path: shared Audio object owns
I2S port 0 (with MCLK), XL9555 routing and amp, then codec init after
the clocks are running. Raw PCM written per frame; a repeated sample
every sixth frame keeps production a hair above the DAC so its clock
paces the game instead of the queue running dry.
- Software gain 1/8 (codec DAC sits at 0 dB); GBC_AUDIO_SHIFT to tune.
- 950 ms delay line (PSRAM) so sound lands with the picture, which
reaches the glass ~1 s after its frame; GBC_AUDIO_DELAY_MS to tune.
- Games start muted; mic key toggles the codec mute in both keyboard
drivers' raw mode; footer shows the current hint. Amp off on quit.
- Notification tones skipped while a game runs (game owns the codec).
MESH LIVE DURING PLAY
- The OTA-style radio pause is gone (GBC_PAUSE_RADIO=1 restores it):
the mesh runs on the other core and already tolerates the panel
blocking the loop. Game header now matches the home screen's -- the
cumulative unread channel count where the node name goes, clock,
battery percent. "New:" toasts suppressed only while a ROM is running
(Snake and Minesweeper keep them).
DISPLAY
- Fast register waveform set to 12 frames per push (FAST_LUT_FRAMES):
judged the best balance of UI speed and contrast. Interface only; the
game keeps the factory waveform.
- Windowed game refresh dropped: measured to save nothing, and it left
the footer row unrefreshed. Normal partial refresh, change-detected.
- Adafruit GFX auto-wrap turned off in the e-ink driver (all e-ink
builds): it dropped a glyph onto the next line's margin when a line
ran a few pixels past the edge (seen with Larger Noto in compose).
Compose wrap width also allows for the driver's 2-unit x offset.
- Game start does one full refresh (tried as a ghosting fix; NPC
ghosting in Pokemon Gold is the game + dither + factory partial
waveform and shows on the stock build too).
Files: examples/companion_radio/{main.cpp, ui-new/GBCEmulatorScreen.{h,cpp},
ui-new/UITask.cpp, ui-new/minigb_apu.{c,h}}, src/helpers/ui/GxEPDDisplay.cpp,
src/helpers/ui/GxEPD2_310_GDEQ031T10_FAST.cpp,
variants/lilygo_tdeck_{max,pro}/TCA8418Keyboard.h