29 lines
986 B
Python
Executable file
29 lines
986 B
Python
Executable file
import time
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import array
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import math
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import audioio
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import board
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import audiobusio
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sample_rate = 8000
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tone_volume = .1 # Increase or decrease this to adjust the volume of the tone.
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frequency = 440 # Set this to the Hz of the tone you want to generate.
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length = sample_rate // frequency # One freqency period
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sine_wave = array.array("H", [0] * length)
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for i in range(length):
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sine_wave[i] = int((math.sin(math.pi * 2 * frequency * i / sample_rate) *
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tone_volume + 1) * (2 ** 15 - 1))
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# For Feather M0 Express, ItsyBitsy M0 Express, Metro M0 Express
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audio = audiobusio.I2SOut(board.D1, board.D0, board.D9)
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# For Feather M4 Express
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# audio = audiobusio.I2SOut(board.D1, board.D10, board.D11)
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# For Metro M4 Express
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# audio = audiobusio.I2SOut(board.D3, board.D9, board.D8)
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sine_wave_sample = audioio.RawSample(sine_wave, sample_rate=sample_rate)
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while True:
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audio.play(sine_wave_sample, loop=True)
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time.sleep(1)
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audio.stop()
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time.sleep(1)
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