docs: wiring a Pi-HAT DAC to the panel; Boards, the targets by role; pages follow the firmware
Audio out gains the bench form of the DAC connection: a figure and a
table of the three I2S wires, ground and the two I2C lines from the
HAT's 40-pin header to J8, J6 and J5, with the power rule (the HAT on
its own supply; J8 pin 2 is USB VBUS without a diode) and what the
firmware logs at boot. Every pin reference on the page now matches the
firmware that plays: BCLK GPIO 2, LRCLK GPIO 3, data GPIO 11, GPIO 12
spare, where the page had proposed GPIO 3, 12 and 11 before a wire was
connected. The standing table, the firmware section and the bench list
say what is proven (tone, FLAC at 44.1 and 96 kHz, MP3, the sink's
volume) and what is not (tier 1 on J5, 32-bit slots, I2S slave).
Boards is new: the ESP32 touch panels recorded as targets, read from
the makers' pages on 19 October 2026, one table per role, with what a
board must have to be a target and how to read a question mark.
Hardware and Home follow: the stereo route is built and plays, the
firmware crate exists, and the companion's crates come by tag where one
exists.
Signed-off-by: foonerd <157698061+foonerd@users.noreply.github.com>