saltylab-firmware

History

sl-firmware 8f51390e43 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>

2026-03-02 12:51:42 -05:00

test_audio.py

feat(audio): I2S3 audio amplifier driver — Issue #143

2026-03-02 10:34:35 -05:00

test_bno055_data.py

feat(firmware): BNO055 NDOF IMU driver on I2C1 (Issue #135 )

2026-03-02 09:40:18 -05:00

test_buzzer.c

feat: Add piezo buzzer melody driver (Issue #253 )

2026-03-02 12:51:42 -05:00

test_crsf_frames.py

feat(rc): CRSF/ELRS RC integration — telemetry uplink + channel fix (Issue #103 )