Closes the format contract on the firmware side. Source-only — Phase 5
toolchain blocker still prevents actually compiling, but when it
unblocks this is one less thing to write under time pressure.
- src/weights.rs — no_std mirror of v2/.../weights.rs. Same magic
('RVNE'), same version 1, same CRC32-IEEE polynomial (matches the C
side in temporal_task.c). Bit-for-bit lockstep with the host: a
blob produced by host WeightBlob::serialize() parses here as a
WeightBlobView byte-for-byte.
Borrowed-slice parse design: the firmware loader receives weights
via mmap'd EMBED_FILES or NVS read into a heap buffer. The parser
takes &[u8] with no copy — view fields point into the caller's
buffer. Caller is responsible for keeping the buffer alive for the
view's lifetime.
Loader errors map to esp_err_t-style codes via
weight_load_err_to_esp() so the C ABI can surface specific failure
modes (ESP_ERR_INVALID_ARG for magic/version/size, ESP_ERR_INVALID_CRC
for corruption, ESP_ERR_INVALID_SIZE for shape validation failures).
- src/lib.rs — ruv_temporal_init now optionally validates a non-NULL
weights blob. NULL pointer is still allowed during the Phase 4/5
bring-up window (kernel forward isn't actually consuming weights
yet), but when caller passes a real blob we parse + sanity-check
declared dims against runtime arguments. Catches deploy bugs at
init() rather than at first classify() — the firmware Tmr Svc work
in v0.6.4 taught us that classify-time crashes are the worst kind.
- README.md — Phase 6 marked done (verified by 8MB firmware build with
feature off in commit 7994af822). Added module map table covering
lib.rs / window.rs / weights.rs / ruv_temporal.h / shim.c.
What's deliberately NOT in this commit:
- Cross-compile validation. Same toolchain blocker as before.
- Kernel-side wiring of weights into the forward pass. That's
Phase 6+ of the firmware roadmap — once the kernel is wired,
weights become a required arg, not an optional one.
- Tests on the firmware side. They'd need build-std working to run;
16/16 host tests cover the format end-to-end via the lockstep
polynomial.
Co-Authored-By: claude-flow <ruv@ruv.net>
Phase 4 of the #513 roadmap: ESP-IDF component skeleton at
`firmware/esp32-csi-node/components/ruv_temporal/`. Source is complete
and self-consistent; cross-compile to xtensa-esp32s3-none-elf is
blocked by a known-broken esp-rs nightly snapshot (details in the
component README).
What's in the scaffold:
- `Cargo.toml` — staticlib, no_std + alloc, deps on the path-vendored
`ruvllm_sparse_attention` (matching ADR-096's host-side dep) and
`esp-alloc`/`critical-section` for the no_std allocator and lock
primitives.
- `src/lib.rs` — public C ABI (init / push / classify / destroy /
self_test) with `#[no_mangle]` exports, a `[#used]` keepalive table
to defeat aggressive linker stripping, esp-alloc as the global
allocator (heap region added at runtime by the firmware), and a
loop-on-panic handler (Phase 5 will route through esp_system_abort).
- `src/window.rs` — `FrameRing`, the rolling-window buffer that
`ruv_temporal_push` writes to. Chronological iteration via
`iter_chronological()` so the kernel sees oldest-first.
- `include/ruv_temporal.h` — the public C header consumed by
edge_processing.c. Threading contract documented inline (single
dedicated FreeRTOS task, no internal locks).
- `CMakeLists.txt` — runs `cargo +esp build` as an ESP-IDF
pre-component-register step, then registers the static library
through `idf_component_register` + `target_link_libraries(...
INTERFACE ...)`. `shim.c` exists only because
`idf_component_register` requires SRCS.
- `.cargo/config.toml` + `rust-toolchain.toml` — pin the build to
`xtensa-esp32s3-none-elf` and the `esp` toolchain channel so
`cargo build` without flags Just Works once the toolchain is
unblocked.
- `README.md` — Phase status table, Phase 5 toolchain blocker
explanation, and the espup install fix.
ABI calls into edge_processing.c (Phase 6) and COM8 validation
(Phase 7) follow once the cross-compile is unblocked.
Closes nothing yet; advances #513.
Co-Authored-By: claude-flow <ruv@ruv.net>
ruv