sl-mechanical dd4eabf218 fix: Investigate USB CDC TX failure (Issue #524) ...

Root causes confirmed from code audit:
1. DCache coherency: USB OTG FS reads physical SRAM while CPU writes through
   DCache. Fix: MPU Region 0 marks 512B aligned USB buffer struct non-cacheable
   (TEX=1, C=0, B=0) before HAL_PCD_Init(). DCache stays enabled globally.
2. IWDG ordering: safety_init() (IWDG start) deferred after all peripheral inits
   to avoid watchdog reset during mpu6000_calibrate() (~510ms blocking).

DMA conflicts, GPIO conflicts, clock tree, and interrupt priorities all ruled out
with evidence. Full findings documented in USB_CDC_BUG.md.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-03-06 23:01:00 -05:00

.claude/plans

feat: Add Issue #467 - Power management supervisor with battery protection

2026-03-05 14:34:37 -05:00

.gitea/workflows

feat(tests): social-bot integration test suite (Issue #108)

2026-03-02 08:50:22 -05:00

.pio/build

feat: motor bench test working — UART5 ESC + USART6 Jetson + W command

2026-03-06 22:35:24 -05:00

chassis

feat: Add Issue #505 CAD - 24V Charging Dock OpenSCAD Models

2026-03-06 11:44:28 -05:00

docs

feat: Add Issue #507 - Face display animations on STM32 LCD

2026-03-06 10:27:36 -05:00

esp32/social_expression

feat(social): Issue #86 — physical expression + motor attention

2026-03-01 23:35:59 -05:00

include

feat: motor bench test working — UART5 ESC + USART6 Jetson + W command

2026-03-06 22:35:24 -05:00

jetson

Merge remote-tracking branch 'origin/sl-perception/issue-469-terrain-classification'

2026-03-06 17:37:27 -05:00

lib/USB_CDC

feat(firmware): OTA DFU entry via JLink command and Python flash script (Issue #124)

2026-03-02 09:56:18 -05:00

phone

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2026-03-06 11:47:15 -05:00

projects/saltybot

feat: outdoor nav — OSM routing + GPS waypoints + geofence (#59)

2026-03-01 00:52:54 -05:00

scripts

feat(firmware): OTA DFU entry via JLink command and Python flash script (Issue #124)

2026-03-02 09:56:18 -05:00

src

feat: motor bench test working — UART5 ESC + USART6 Jetson + W command

2026-03-06 22:35:24 -05:00

test

feat: Add Issue #507 - Face display animations on STM32 LCD

2026-03-06 10:27:36 -05:00

ui

feat: centralized parameter server + dynamic reconfiguration (Issue #471)

2026-03-05 12:10:04 -05:00

.DS_Store

feat: rosbridge WebSocket server for web UI (port 9090)

2026-03-01 00:22:02 -05:00

AUTONOMOUS_ARMING.md

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2026-03-06 11:46:03 -05:00

CLAUDE.md

docs: multi-variant branch strategy (issue #28)

2026-02-28 18:49:41 -05:00

flash.sh

Balance firmware + USB CDC bug

2026-02-28 11:58:23 -05:00

platformio.ini

Balance firmware + USB CDC bug

2026-02-28 11:58:23 -05:00

TEAM.md

Add USB CDC bug doc and team requirements

2026-02-28 11:59:53 -05:00

USB_CDC_BUG.md

fix: Investigate USB CDC TX failure (Issue #524)

2026-03-06 23:01:00 -05:00

Description

SaltyLab self-balancing bot firmware (STM32F722)

11 MiB

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