test/test_tdeck_keyboard_detect.cpp compiles the production
TDeckKeyboard.cpp against a scripted keyboard controller on a fake I2C
bus. Probe: 71 71 71 71 71 goes legacy with the saved-setting evidence
(taken once), padded 71 00 00 00 00 and an 8-bit burst go legacy unsaved,
a key in column 1 goes raw. Raw path: the repeated 'q' and a repeated
space go legacy and type the one character, padded types 'q' unsaved,
q+e (01 01), 21 21, space+z (20 20) and 23 01 stay raw and type their
keys, 8 keys at once go legacy typing nothing, 7 stay raw, high-bit frames
are ignored, the setting forces legacy. Exhaustively over all 35 matrix
cells: no 1- or 2-key chord reads as a reply; the 25 3-key chords that do
are all column 0 with space or the row-6 key.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
