propertized and simpletest

examples/tlv320_simpletest.py

@@ -1,4 +1,44 @@
-# SPDX-FileCopyrightText: 2017 Scott Shawcroft, written for Adafruit Industries
 # SPDX-FileCopyrightText: Copyright (c) 2025 Liz Clark for Adafruit Industries
-#
-# SPDX-License-Identifier: Unlicense
+# SPDX-License-Identifier: MIT
+
+import time
+import array
+import math
+import audiocore
+import board
+import busio
+import audiobusio
+import adafruit_tlv320
+
+i2c = busio.I2C(board.SCL, board.SDA)
+dac = adafruit_tlv320.TLV320DAC3100(i2c)
+
+# use a preset 
+# (PRESET_MID_QUALITY, PRESET_CD_QUALITY, PRESET_DVD_QUALITY or PRESET_HIRES_QUALITY)
+# dac.configure_audio_preset(adafruit_tlv320.PRESET_CD_QUALITY))
+# or set mclk, sample rate & bit depth manually
+dac.configure_clocks(mclk_freq=12000000, sample_rate=22050, bit_depth=8)
+
+# use headphones
+dac.headphone_output = True
+dac.headphone_volume = -20
+# or use speaker
+# dac.speaker_output = True
+# dac.speaker_volume = -15
+
+audio = audiobusio.I2SOut(board.I2S_BCLK, board.I2S_WS, board.I2S_DIN)
+# Generate a sine wave
+tone_volume = 0.5
+frequency = 440
+sample_rate = dac.sample_rate
+length = sample_rate // frequency
+sine_wave = array.array("h", [0] * length)
+for i in range(length):
+    sine_wave[i] = int((math.sin(math.pi * 2 * i / length)) * tone_volume * (2 ** 15 - 1))
+sine_wave_sample = audiocore.RawSample(sine_wave, sample_rate=sample_rate)
+
+while True:
+    audio.stop()
+    time.sleep(1)
+    audio.play(sine_wave_sample, loop=True)
+    time.sleep(1)