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pureboot: the activation countdown in the narrowest type that holds it

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The fixed-baud window counted down a uint32 where almost every window fits
24 bits; the countdown now takes avr::uint24_t when the poll budget allows
(the autobaud budget's own choice), uint32 past 16.7M polls — four bytes
off every fixed-baud image on every chip, the full suites green on the
changed window. The README size table is refreshed — its autobaud column
had also gone stale by the no-assembly pass's measurement-loop win, which
nothing gated: sizes.py check-readme now runs as the gate's final stage,
where every tree is freshly built and the table can actually be held.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
BlackMark
2026-07-28 14:47:29 +02:00
parent 321ff8a4ee
commit c535c4756c
4 changed files with 29 additions and 18 deletions
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ide/README.md
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@@ -2,7 +2,7 @@
`master` carries `bootloader.atsln`, so this branch does too: `ide/bootloader.atsln`
builds the loaders from the same sources Ninja does, to a **byte-identical
`.text`** — 404 B for the 328P pureboot loader, 510 B for the `tsb_asm` tier in
`.text`** — 400 B for the 328P pureboot loader, 510 B for the `tsb_asm` tier in
its 512-byte section. CMake remains the build system; the solution is here so the
port opens in Studio as its predecessor did.