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Promote dev to main: ESP32-S3 runtime validation#8

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WaylandYang merged 2 commits into
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May 22, 2026
Merged

Promote dev to main: ESP32-S3 runtime validation#8
WaylandYang merged 2 commits into
mainfrom
dev

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Brings in PR #7 — T-Panel S3 runtime-validated, README + paper updated.

WaylandYang and others added 2 commits May 19, 2026 19:14
…#2)

Companion to the new branch protection rules just applied to the repo:
- main is release-grade, PR-only, linear history, no force-push/delete
- dev is integration, accepts direct push but still no force/delete
- feat/* is documented convention only; no GitHub-side rule —
  contributors push freely, rebase freely, PR to dev when done

Adds a typical-loop snippet so contributors don't have to read
GitHub settings to figure out the workflow.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
DCP firmware now runs on a second physical board. The lamp example
flashed to a LILYGO T-Panel S3 and passed all 13 round-trip cases
(tools/test_uart_roundtrip.py) over the S3's native USB-Serial/JTAG
interface — no CH340-class USB-UART bridge chip in the path.

This adds a second runtime-validated target alongside ESP32-WROOM-32,
and a second ISA generation (Xtensa LX7 vs LX6). It also exercises
DCP over a native-USB CDC link for the first time: same firmware, no
transport-specific code, FQBN options USBMode=hwcdc + CDCOnBoot=cdc
route the Arduino `Serial` to the USB-Serial/JTAG controller.

S3 build footprint: 322 KB flash / 22.7 KB globals (PSRAM disabled,
which is the safe bring-up config — the lamp example does not need
PSRAM, so this avoids any QSPI-vs-OPI boot-loop risk).

Changes:
- README "Validated on real hardware": now states two boards; adds
  the native-USB detail
- README cross-compile matrix: ESP32-S3 row added with runtime ✓
- README roadmap bullet updated
- docs/paper/main.tex §validation: two-board statement + S3 added to
  the portability footprint list

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
@WaylandYang WaylandYang merged commit f417900 into main May 22, 2026
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