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8f51390e43
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feat: Add piezo buzzer melody driver (Issue #253)
Implements STM32F7 non-blocking driver for piezo buzzer on PA8 using TIM1 PWM.
Plays predefined melodies and custom sequences with melody queue.
Features:
- PA8 TIM1_CH1 PWM output with dynamic frequency control
- Predefined melodies: startup jingle, battery warning, error alert, docking chime
- Non-blocking melody queue with FIFO scheduling (4-slot capacity)
- Custom melody and simple tone APIs
- 15 musical notes (C4-C6) with duration presets
- Rest (silence) notes for composition
- 50% duty cycle for optimal piezo buzzer drive
API Functions:
- buzzer_init(): Configure PA8 PWM and TIM1
- buzzer_play_melody(type): Queue predefined melody
- buzzer_play_custom(notes): Queue custom note sequence
- buzzer_play_tone(freq, duration): Queue simple tone
- buzzer_stop(): Stop playback and clear queue
- buzzer_is_playing(): Query playback status
- buzzer_tick(now_ms): Periodic timing update (10ms recommended)
Test Suite:
- 52 passing unit tests covering:
* Melody structure and termination
* Simple and multi-note playback
* Frequency transitions
* Queue management
* Timing accuracy
* Rest notes in sequences
* Musical frequency ranges
Integration:
- Called at startup and ticked every 10ms in main loop
- Used for startup jingle, battery warnings, error alerts, success feedback
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
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2026-03-02 12:51:42 -05:00 |
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