david
8cd796e3dd
- USB gadget (UAC1 + MIDI) with boot persistence - USB host mode with auto-detection - Pure Data synth patch with ALSA + UDP netreceive MIDI input - MIDI rawmidi-to-UDP bridge (midi-bridge.py) - LED matrix visualization (led-matrix-viz.py via arduino-router RPC) - MCU sketch for LED matrix control (Arduino_RouterBridge + ArduinoGraphics) - Conftest/OPA Rego policy validation suite for .pd files - gen_synth_pd.py: programmatic .pd file generator - System services: midi-bridge, led-matrix-viz, pd-synth-auto, usb-role-detect - Justfile with deploy, enable, diagnostic recipes - Diagnostic script (diag.sh)
42 lines
1.4 KiB
Bash
Executable File
42 lines
1.4 KiB
Bash
Executable File
#!/bin/bash
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# configure-usb-host.sh — Wait for USB audio interface in host mode.
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# Finds the first USB audio capture/playback device and writes device
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# info to /run/usb-audio-dev for Pd to use.
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#
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# When the Uno Q acts as USB host (MIDI controller + USB audio interface
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# connected via hub), the USB audio interface appears as a ALSA card
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# driven by snd-usb-audio.
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set -euo pipefail
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DEV_FILE="/run/usb-audio-dev"
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POLL_SECONDS=10
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die() { echo "[USB-HOST] $*" >&2; exit 1; }
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info() { echo "[USB-HOST] $*"; }
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info "Waiting for USB audio interface..."
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for ((i = 0; i < POLL_SECONDS; i++)); do
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# Look for USB audio cards (not UAC1Gadget, not internal)
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cards=$(aplay -l 2>/dev/null | grep -i "usb" | grep -vi "gadget" || true)
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if [ -n "$cards" ]; then
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# Pick the first USB audio card
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card=$(echo "$cards" | head -1 | awk '{print $2}' | tr -d ':')
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info "Found USB audio card: $card"
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echo "hw:$card,0" > "$DEV_FILE"
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cat "$DEV_FILE"
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exit 0
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fi
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# Also check if any MIDI devices appeared
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if command -v aseqdump &>/dev/null; then
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midi_ports=$(aconnect -i -o -l 2>/dev/null | grep -i "usb" | head -1 || true)
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if [ -n "$midi_ports" ]; then
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info "Found USB MIDI device: $midi_ports"
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fi
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fi
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sleep 1
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done
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die "No USB audio interface found after ${POLL_SECONDS}s (connect one and restart)"
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