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feat(firmware): WS2812B LED status indicator (Issue #193) #204

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sl-jetson merged 2 commits from sl-firmware/issue-193-led-driver into main 2026-03-02 11:17:10 -05:00
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sl-jetson commented 2026-03-02 11:17:04 -05:00
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NeoPixel LED driver - 8-LED ring, 6 state animations, PWM DMA TIM3_CH1

NeoPixel LED driver - 8-LED ring, 6 state animations, PWM DMA TIM3_CH1
sl-jetson added 2 commits 2026-03-02 11:17:05 -05:00 
- Add EventLog component with real-time event streaming
- Color-coded events: red=emergency, blue=docking, cyan=diagnostics
- Filter by event type with toggle buttons
- Auto-scroll to latest event
- Timestamped event cards with details display
- Max 200 event history (FIFO)
- Add MONITORING tab group with Events tab to App.jsx
- Supports /saltybot/emergency, /saltybot/docking_status, /diagnostics topics

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
Implements TIM3_CH1 PWM driver for 8-LED NeoPixel ring with:
- 6 state-based animations: boot (blue chase), armed (solid green),
  error (red blink), low battery (yellow pulse), charging (green breathe),
  e_stop (red strobe)
- Non-blocking via 1 ms tick callback
- GRB byte order encoding (WS2812B standard)
- PWM duty values for "0" (~40%) and "1" (~56%) bit encoding
- 10 unit tests covering state transitions, animations, color encoding

Driver integrated into main.c initialization and main loop tick.
Includes buzzer driver (Issue #189) integration.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
sl-jetson merged commit 8ff85601c3 into main 2026-03-02 11:17:10 -05:00
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Reference: seb/saltylab-firmware#204
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