d80c35984e
Develop the full Daisy Pod spike so it can be flashed the moment the board arrives. Architecture: one shared engine, two front-ends. - pm-synth: make it `#![no_std]` (mirroring track-format), routing float math through `libm` so the SAME f32 code runs on the host and on the Daisy's Cortex-M7F (hardware FPU — no fixed-point port needed). Add `Player`, a self-running sequencer that owns the Synth + scheduled clicks and renders sample-by-sample, looping at the pattern boundary. Integer-only hot path (clicks pre-resolved to sample indices); exposes a `fired()` beat counter. Add SPIKE_PROGRAM/SPIKE_BARS as the shared source of truth. - synthrender: render the SAME Player to pm-daisy-preview.wav — the host-side "simulator". Bit-identical preview of the hardware output (before its codec); far more useful than chip emulation (Renode can't model the audio codec). - pm-daisy (new, workspace-excluded firmware): thin BSP binary for the Daisy Seed/Pod. embedded-alloc heap + board bring-up + SAI-DMA audio interrupt feeding Player::next_sample() into stereo frames, USER LED flashing per click. Audio loop follows the `daisy` crate's examples/audio.rs. Board revision (codec) is a Cargo feature; README documents matching it + both flash paths (probe-rs/RTT and USB DFU) + the QSPI-bootloader fallback. Verified without hardware: host build + preview render (48 kHz, onsets on the 8th-note grid at 124 BPM); firmware cross-compiles + links for thumbv7em-none- eabihf at ~87 KB (fits the 128 KB internal flash) across all three codec revisions; track-format conformance + `node tests/run.mjs` (47 pass) still green. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
12 lines
734 B
TOML
12 lines
734 B
TOML
[package]
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name = "pm-synth"
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version = "0.1.0"
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edition = "2021"
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description = "Polyphonic drum-voice synthesizer — a Rust port of engine.js's 808/909 voices. Transport-agnostic (offline render now; on-device real-time later)."
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# `#![no_std]` f32 reference: the same code host-renders to .wav (synthrender) AND runs on a
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# Cortex-M with an FPU (the Daisy Seed's STM32H750, via pm-daisy). Float math goes through `libm`
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# so host and device compute identically. The RP2350/M0+ fixed-point port is still future work.
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[dependencies]
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libm = "0.2" # no_std transcendental math (sinf/cosf/powf/tanhf/floorf)
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track-format = { path = "../track-format" } # Player schedules a parsed Track into the click timeline
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