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Me Here b154ccf493 pm-kit: hold CS low — fix ST7796 1/4 screen (mipidsi toggles CS mid-command) 
Reading mipidsi's interface/spi.rs: send_command writes the command byte and its
parameters as TWO separate SpiDevice transactions, so a normal SpiDevice de-asserts
CS between them. The ST7796 needs CS continuous across command+parameters, so
MADCTL/COLMOD/B6 args never loaded → default scan/orientation → 1/4 + rotated
(parameter-less commands and the pixel stream still worked, which is why it lit up).

CircuitPython's FourWire holds CS low for the whole command; replicate that: drive
the real CS (GP5) low for the session and give ExclusiveDevice a no-op CS. DC alone
selects command vs data.

Diagnosed entirely on the host: panelsim (new) decodes mipidsi's actual command/
pixel stream into a PNG and rendered perfectly, proving the protocol was right and
the bug was in the physical SPI/CS layer — then the driver source confirmed it.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-05-31 23:01:04 -05:00
..
pm-kit pm-kit: hold CS low — fix ST7796 1/4 screen (mipidsi toggles CS mid-command) 2026-05-31 23:01:04 -05:00
pm-ui Rust UI: host simulator (PNG) + shared pm-ui crate; trim panel init 2026-05-31 21:54:20 -05:00
track-format Rust port Stage 2: scheduler timing + no_std (builds for RP2350) 2026-05-31 19:34:02 -05:00
uisim pm-kit: hold CS low — fix ST7796 1/4 screen (mipidsi toggles CS mid-command) 2026-05-31 23:01:04 -05:00
Containerfile Rust port Stage 1: track-format codec crate (passes the golden vectors) 2026-05-31 18:36:59 -05:00
README.md Rust port Stage 1: track-format codec crate (passes the golden vectors) 2026-05-31 18:36:59 -05:00
run.sh Rust port Stage 1: track-format codec crate (passes the golden vectors) 2026-05-31 18:36:59 -05:00

README.md

Rust port — track-format crate (Stage 1)

Pure parse/serialize codec for the track DSL, validated against the shared golden vectors (tests/fixtures/track-format.json) — the third implementation alongside engine.js and app.py. See docs/rust-port.md for the staged plan.

All tooling runs in a container (per the develop-in-container rule):

./rust/run.sh            # cargo test — runs the conformance + idempotency suite
./rust/run.sh cargo build
./rust/run.sh bash       # interactive shell in the crate