pi-multifx-pedal

shawn/pi-multifx-pedal

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Author	SHA1	Message	Date
shawn	c2071a9724	feat(audio): Focusrite 2i2 stereo JACK config for 4CM Adds: - AudioConfig.mode field: 'mono' (default) or 'stereo_4cm' - capture_channels / playback_channels properties for dynamic JACK -i/-o counts - FOCUSRITE_PROFILES dict with focusrite_2i2_3gen entry - AudioSystem.channel_mapping_help() static method - stereo_4cm port auto-connect wiring (4 cable method) - Systemd service content uses dynamic channel counts - Default config YAML includes 'mode: mono' - 11 new tests (31 total pass) - Focusrite 4CM wiring docs in docs/config-audio.md	2026-06-08 10:40:38 -04:00
shawn	0ae2ca6e8e	feat: PCM1808+PCM5102 I2S HAT design files Custom I2S HAT for Pi Multi-FX Pedal — full hardware package: - KiCad project: schematic (kicad_sch), PCB layout (kicad_pcb), project file - Custom DT overlay: pcm1808-pcm5102-overlay.dts (no upstream overlay exists for PCM1808) - docs/hardware-bom.md: BOM (9.25 HAT + 1.75 with enclosure), wiring diagram, PCB design notes - docs/config-audio.md: DT overlay build, ALSA config, JACK integration, troubleshooting - scripts/install_hat.sh: One-command install + test suite (6 tests) - hardware/gerber/: JLCPCB fab instructions and assembly notes Circuit: Guitar input → TL072 preamp (gain ~20dB) → PCM1808 ADC → RPi I2S → PCM5102 DAC → RC filter → output jack I2S: BCLK/GPIO18, LRCLK/GPIO19, DIN/GPIO20, DOUT/GPIO21 Stacking header passes all 40 GPIO pins for footswitches/LEDs/display	2026-06-07 23:52:13 -04:00

Author

SHA1

Message

Date

shawn

c2071a9724

feat(audio): Focusrite 2i2 stereo JACK config for 4CM

Adds:
- AudioConfig.mode field: 'mono' (default) or 'stereo_4cm'
- capture_channels / playback_channels properties for dynamic JACK -i/-o counts
- FOCUSRITE_PROFILES dict with focusrite_2i2_3gen entry
- AudioSystem.channel_mapping_help() static method
- stereo_4cm port auto-connect wiring (4 cable method)
- Systemd service content uses dynamic channel counts
- Default config YAML includes 'mode: mono'
- 11 new tests (31 total pass)
- Focusrite 4CM wiring docs in docs/config-audio.md

2026-06-08 10:40:38 -04:00

shawn

0ae2ca6e8e

feat: PCM1808+PCM5102 I2S HAT design files

Custom I2S HAT for Pi Multi-FX Pedal — full hardware package:

- KiCad project: schematic (kicad_sch), PCB layout (kicad_pcb), project file
- Custom DT overlay: pcm1808-pcm5102-overlay.dts (no upstream overlay exists for PCM1808)
- docs/hardware-bom.md: BOM (9.25 HAT + 1.75 with enclosure), wiring diagram, PCB design notes
- docs/config-audio.md: DT overlay build, ALSA config, JACK integration, troubleshooting
- scripts/install_hat.sh: One-command install + test suite (6 tests)
- hardware/gerber/: JLCPCB fab instructions and assembly notes

Circuit: Guitar input → TL072 preamp (gain ~20dB) → PCM1808 ADC → RPi I2S
  → PCM5102 DAC → RC filter → output jack
I2S: BCLK/GPIO18, LRCLK/GPIO19, DIN/GPIO20, DOUT/GPIO21
Stacking header passes all 40 GPIO pins for footswitches/LEDs/display

2026-06-07 23:52:13 -04:00

2 Commits