Add audio output option file to Larsio and Chip's Challenge

Author: RetiredWizard

Fruit_Jam/Larsio_Paint_Music/sound_manager.py

@@ -9,6 +9,7 @@
 import math
 import time
 import array
+import json
 import gc
 import os
 import digitalio
@@ -22,6 +23,7 @@
 import audiomixer
 import synthio
 import board
+import adafruit_pathlib as pathlib
 import adafruit_tlv320
 from adafruit_midi.note_on import NoteOn
 from adafruit_midi.note_off import NoteOff
@@ -63,6 +65,15 @@ def __init__(self, audio_output="pwm", seconds_per_eighth=0.25):
             # Setup PWM audio output on D10
             self.audio = audiopwmio.PWMAudioOut(board.D10)
         else:  # i2s
+            # optional configuration file for speaker/headphone setting, check current and root directory
+            launcher_config = {}
+            if pathlib.Path("launcher.conf.json").exists():
+                with open("launcher.conf.json", "r") as f:
+                    launcher_config = json.load(f)
+            elif pathlib.Path("/launcher.conf.json").exists():
+                with open("/launcher.conf.json", "r") as f:
+                    launcher_config = json.load(f)
+
             try:
                 # Import libraries needed for I2S
                 #check for Metro RP2350 vs. Fruit Jam
@@ -96,20 +107,49 @@ def __init__(self, audio_output="pwm", seconds_per_eighth=0.25):
                     wsel_pin = board.I2S_WS
                     din_pin = board.I2S_DIN
 
+                # Check if DAC is connected
+                while not i2c.try_lock():
+                    time.sleep(0.01)
+                if 0x18 in i2c.scan():
+                    ltv320_present = True
+                else:
+                    ltv320_present = False
+                i2c.unlock()
+
                 # Initialize TLV320
-                self.tlv = adafruit_tlv320.TLV320DAC3100(i2c)
-                self.tlv.configure_clocks(sample_rate=11025, bit_depth=16)
-                self.tlv.headphone_output = True
-                self.tlv.headphone_volume = -15  # dB
-
-                # Setup I2S audio output - important to do this AFTER configuring the DAC
-                self.audio = audiobusio.I2SOut(
-                    bit_clock=bclck_pin,
-                    word_select=wsel_pin,
-                    data=din_pin
-                )
-
-                print("TLV320 I2S DAC initialized successfully")
+                if ltv320_present:
+                    self.tlv = adafruit_tlv320.TLV320DAC3100(i2c)
+
+                    # set sample rate & bit depth
+                    self.tlv.configure_clocks(sample_rate=11025, bit_depth=16)
+
+                    if "sound" in launcher_config:
+                        if launcher_config["sound"] == "speaker":
+                            # use speaker
+                            self.tlv.speaker_output = True
+                            self.tlv.speaker_volume = -60
+                        else:
+                            # use headphones
+                            self.tlv.headphone_output = True
+                            self.tlv.headphone_volume = -15  # dB
+                    else:
+                        # default to headphones
+                        self.tlv.headphone_output = True
+                        self.tlv.headphone_volume = -15  # dB
+
+                    # Setup I2S audio output - important to do this AFTER configuring the DAC
+                    self.audio = audiobusio.I2SOut(
+                        bit_clock=bclck_pin,
+                        word_select=wsel_pin,
+                        data=din_pin
+                    )
+
+                    print("TLV320 I2S DAC initialized successfully")
+
+                else:
+                    print("TLV320 DAC not found, falling back to PWM audio output")
+                    self.audio = audiopwmio.PWMAudioOut(board.D10)
+
             except Exception as e:
                 print(f"Error initializing TLV320 DAC: {e}")
                 print("Falling back to PWM audio output")

Metro/Metro_RP2350_Chips_Challenge/code.py

@@ -7,7 +7,6 @@
 import picodvi
 import framebufferio
 import displayio
-import adafruit_tlv320
 import audiobusio
 from audio import Audio
 from game import Game
@@ -39,16 +38,12 @@
 
 displayio.release_displays()
 
-i2c = board.I2C()
-dac = adafruit_tlv320.TLV320DAC3100(i2c)
-dac.configure_clocks(sample_rate=44100, bit_depth=16)
-dac.headphone_output = True
-dac.headphone_volume = -15  # dB
-
 if hasattr(board, "I2S_BCLK"):
     audio_bus = audiobusio.I2SOut(board.I2S_BCLK, board.I2S_WS, board.I2S_DIN)
-else:
+elif hasattr(board, "D9") and hasattr(board, "D10") and hasattr(board, "D11"):
     audio_bus = audiobusio.I2SOut(board.D9, board.D10, board.D11)
+else:
+    audio_bus = None
 audio = Audio(audio_bus, SOUND_EFFECTS)
 
 fb = picodvi.Framebuffer(320, 240, clk_dp=board.CKP, clk_dn=board.CKN,

Metro/Metro_RP2350_Chips_Challenge/definitions.py

@@ -1,10 +1,60 @@
 # SPDX-FileCopyrightText: 2025 Melissa LeBlanc-Williams
 #
 # SPDX-License-Identifier: MIT
+import json
+import board
 from micropython import const
+import adafruit_pathlib as pathlib
+import adafruit_tlv320
+
+# optional configuration file for speaker/headphone setting, check current and root directory
+launcher_config = {}
+if pathlib.Path("launcher.conf.json").exists():
+    with open("launcher.conf.json", "r") as f:
+        launcher_config = json.load(f)
+elif pathlib.Path("/launcher.conf.json").exists():
+    with open("/launcher.conf.json", "r") as f:
+        launcher_config = json.load(f)
+
+# Check if DAC is connected
+i2c = board.I2C()
+while not i2c.try_lock():
+    time.sleep(0.01)
+if 0x18 in i2c.scan():
+    ltv320_present = True
+else:
+    ltv320_present = False
+i2c.unlock()
+
+if ltv320_present:
+    dac = adafruit_tlv320.TLV320DAC3100(i2c)
+
+    # set sample rate & bit depth
+    dac.configure_clocks(sample_rate=44100, bit_depth=16)
+
+    if "sound" in launcher_config:
+        if launcher_config["sound"] == "speaker":
+            # use speaker
+            dac.speaker_output = True
+            dac.speaker_volume = -40
+        elif launcher_config["sound"] != "mute":
+            # use headphones
+            dac.headphone_output = True
+            dac.headphone_volume = -15  # dB
+    else:
+        # default to headphones
+        dac.headphone_output = True
+        dac.headphone_volume = -15  # dB
 
 # Settings
-PLAY_SOUNDS = True
+if ltv320_present:
+    PLAY_SOUNDS = True
+else:
+    PLAY_SOUNDS = False
+
+if "sound" in launcher_config:
+    if launcher_config["sound"] == "mute":
+        PLAY_SOUNDS = False
 
 # Timing Constants
 TICKS_PER_SECOND = const(20)