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Fold bootloader documentation into the main doc/ index

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Adds doc/10_usb_bootloader.md as the primary reference for the UF2
bootloader (memory layout, key-based boot entry, build/flash steps,
hardware test findings, known limitations), following the existing
numbered-doc convention. Updates doc/INDEX.md, doc/09_known_limitations.md
(bootloader is no longer "not supported", just scoped), and
doc/08_development.md accordingly.

Removes bootloader/TESTING.md (its findings now live in
doc/10_usb_bootloader.md) and trims bootloader/README.md down to what
belongs with that subproject specifically: upstream attribution/license
and local build/flash commands, plus the OpenOCD manual-flashing
warning since that's implementation-specific detail that would clutter
the higher-level doc.

Updates the top-level README.md (feature table, hardware table,
quickstart, project tree, doc links) to reflect USB flashing as a
supported path alongside SWD.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
Julian Appel 2026-08-05 22:49:56 +02:00
parent 3986d2effe
commit 33d9e85992
7 changed files with 153 additions and 201 deletions
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doc/08_development.md
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@ -26,9 +26,9 @@ pio run -e versapad --target upload
Der Upload nutzt `upload_openocd.py`, das das von PlatformIO installierte
OpenOCD mit `interface/cmsis-dap.cfg` und `target/at91samdXX.cfg` startet.
Das in `platformio.ini` nur als Beispiel enthaltene Environment
`versapad_usb` ist auskommentiert und mit dem aktuellen NVM-/Linker-Layout
nicht als unterstützt anzusehen.
Für App-Updates über USB (nach einem einmaligen Bootloader-Flash) gibt es
zusätzlich `env:versapad_usb`, siehe
[10_usb_bootloader.md](10_usb_bootloader.md).
## Was beim Start passiert
@ -63,6 +63,7 @@ und NVM-Schreibvorgängen. Es gibt keinen Scheduler und keine Threads.
| LEDs | `05_led_system.md` | `CButton.*`, `hal/ws2812.*` |
| Persistente Config | `06_nvm_config.md` | `config/nvm_config.*`, Linker-Skripte |
| Host-Protokoll | `07_serial_protocol.md` | `hal/usb_serial.*`, Controller |
| USB-Bootloader | `10_usb_bootloader.md` | `bootloader/`, `variants/versapad/linker_scripts/gcc/flash_with_bootloader.ld`, `boards/versapad.json`, `uf2conv.py`, `upload_uf2.py` |
## Verifikation