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Save current changes before reorganizing drivers and cleaning workspace

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This commit is contained in:
Adolfo Reyna
2026-06-17 22:17:59 -04:00
parent 3356e5d4a2
commit 2813c11104
21 changed files with 2904 additions and 132 deletions
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audio_util.py
+41 -34
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@@ -79,24 +79,30 @@ def record_audio(duration_seconds=5, filename='recording.pcm'):
duration_seconds (int): How long to record in seconds.
filename (str): Name of output raw PCM file on the device.
"""
# 1. Start I2C Control Bus (SDA=13, SCL=14)
i2c = I2C(0, sda=Pin(13), scl=Pin(14))
# 1. Start I2C Control Bus (SDA=16, SCL=15)
i2c = I2C(0, sda=Pin(16), scl=Pin(15))
# 1a. Setup Master Clock (MCLK) on GPIO 4 using PWM (needed for ES8311 ADC)
mclk_pin = Pin(4, Pin.OUT)
mclk_pwm = machine.PWM(mclk_pin)
mclk_pwm.freq(6144000)
mclk_pwm.duty_u16(32768)
# 2. Configure I2S Receiver
# Pins: sck=BCLK (GPIO 9), ws=WS/LRCK (GPIO 45), sd=DIN (GPIO 10)
# Pins: sck=BCLK (GPIO 5), ws=WS/LRCK (GPIO 7), sd=DIN (GPIO 6)
i2s = I2S(1,
sck=Pin(9),
ws=Pin(45),
sd=Pin(10),
sck=Pin(5),
ws=Pin(7),
sd=Pin(6),
mode=I2S.RX,
ibuf=16000,
rate=16000,
bits=16,
format=I2S.STEREO)
# 3. Wake up and configure the ES7210 microphone chip
mic_adc = ES7210(i2c)
if not mic_adc.init(sample_rate=16000, bit_width=16):
# 3. Wake up and configure the ES8311 codec chip
mic_adc = ES8311(i2c)
if not mic_adc.init(sample_rate=16000):
i2s.deinit()
return False
@@ -125,7 +131,8 @@ def record_audio(duration_seconds=5, filename='recording.pcm'):
finally:
# Always release the I2S peripheral resources
i2s.deinit()
print("I2S receiver deinitialized.")
mclk_pwm.deinit()
print("I2S receiver and MCLK deinitialized.")
class ES8311:
@@ -155,11 +162,11 @@ class ES8311:
self._write(0x00, 0x00)
time.sleep_ms(10)
# Clock Configuration (16kHz sample rate, MCLK=12.288MHz)
# Clock Configuration (16kHz sample rate, MCLK=6.144MHz)
self._write(0x01, 0x3F) # Enable all clocks, use MCLK pin
self._write(0x02, 0x48) # pre_div=3, pre_mult=1
self._write(0x03, 0x10) # fs_mode=0, adc_osr=16
self._write(0x04, 0x20) # dac_osr=32
self._write(0x04, 0x10) # dac_osr=16
self._write(0x05, 0x00) # adc_div=1, dac_div=1
self._write(0x06, 0x03) # bclk_div=4 (4-1=3)
self._write(0x07, 0x00) # lrck_h=0
@@ -219,14 +226,14 @@ def play_tone(frequency=440, duration_ms=1000, volume=50):
print(f"Playing tone: {frequency}Hz for {duration_ms}ms (vol={volume})...")
# 1. Setup Master Clock (MCLK) on GPIO 16 using PWM
mclk_pin = Pin(16, Pin.OUT)
# 1. Setup Master Clock (MCLK) on GPIO 4 using PWM
mclk_pin = Pin(4, Pin.OUT)
mclk_pwm = machine.PWM(mclk_pin)
mclk_pwm.freq(12288000)
mclk_pwm.freq(6144000)
mclk_pwm.duty_u16(32768)
# 2. Start I2C Control Bus (SDA=13, SCL=14)
i2c = I2C(0, sda=Pin(13), scl=Pin(14))
# 2. Start I2C Control Bus (SDA=16, SCL=15)
i2c = I2C(0, sda=Pin(16), scl=Pin(15))
# 3. Initialize the ES8311 DAC
dac = ES8311(i2c)
@@ -237,10 +244,10 @@ def play_tone(frequency=440, duration_ms=1000, volume=50):
dac.set_volume(volume)
# 4. Configure I2S TX
# Pins: sck=BCLK (GPIO 9), ws=WS/LRCK (GPIO 45), sd=DOUT (GPIO 8)
# Pins: sck=BCLK (GPIO 5), ws=WS/LRCK (GPIO 7), sd=DOUT (GPIO 8)
i2s = I2S(1,
sck=Pin(9),
ws=Pin(45),
sck=Pin(5),
ws=Pin(7),
sd=Pin(8),
mode=I2S.TX,
ibuf=8000,
@@ -248,8 +255,8 @@ def play_tone(frequency=440, duration_ms=1000, volume=50):
bits=16,
format=I2S.STEREO)
# 5. Enable Speaker Amplifier (GPIO 46)
amp_pin = Pin(46, Pin.OUT, value=1)
# 5. Enable Speaker Amplifier (GPIO 1, Active Low)
amp_pin = Pin(1, Pin.OUT, value=0)
# 6. Generate sine wave cycle
# Approximate frequency to make integer number of samples per cycle
@@ -277,7 +284,7 @@ def play_tone(frequency=440, duration_ms=1000, volume=50):
# 7. Clean up
time.sleep_ms(100) # Let the remaining buffer play out
amp_pin.value(0)
amp_pin.value(1) # Disable amp
i2s.deinit()
mclk_pwm.deinit()
print("Tone playback complete.")
@@ -337,14 +344,14 @@ def play_wav(filename, volume=50):
print(f"WAV Info: {sample_rate}Hz, {bits} bits, {'Mono' if channels == 1 else 'Stereo'}")
# 2. Setup Master Clock (MCLK) on GPIO 16 using PWM
mclk_pin = Pin(16, Pin.OUT)
# 2. Setup Master Clock (MCLK) on GPIO 4 using PWM
mclk_pin = Pin(4, Pin.OUT)
mclk_pwm = machine.PWM(mclk_pin)
mclk_pwm.freq(12288000)
mclk_pwm.freq(6144000)
mclk_pwm.duty_u16(32768)
# 3. Start I2C Control Bus (SDA=13, SCL=14)
i2c = I2C(0, sda=Pin(13), scl=Pin(14))
# 3. Start I2C Control Bus (SDA=16, SCL=15)
i2c = I2C(0, sda=Pin(16), scl=Pin(15))
# 4. Initialize the ES8311 DAC
dac = ES8311(i2c)
@@ -356,11 +363,11 @@ def play_wav(filename, volume=50):
dac.set_volume(volume)
# 5. Configure I2S TX
# Pins: sck=BCLK (GPIO 9), ws=WS/LRCK (GPIO 45), sd=DOUT (GPIO 8)
# Pins: sck=BCLK (GPIO 5), ws=WS/LRCK (GPIO 7), sd=DOUT (GPIO 8)
i2s_format = I2S.MONO if channels == 1 else I2S.STEREO
i2s = I2S(1,
sck=Pin(9),
ws=Pin(45),
sck=Pin(5),
ws=Pin(7),
sd=Pin(8),
mode=I2S.TX,
ibuf=4096,
@@ -368,8 +375,8 @@ def play_wav(filename, volume=50):
bits=bits,
format=i2s_format)
# 6. Enable Speaker Amplifier (GPIO 46)
amp_pin = Pin(46, Pin.OUT, value=1)
# 6. Enable Speaker Amplifier (GPIO 1, Active Low)
amp_pin = Pin(1, Pin.OUT, value=0)
# 7. Read and stream chunks to I2S
buf = bytearray(2048)
@@ -381,7 +388,7 @@ def play_wav(filename, volume=50):
# 8. Clean up
time.sleep_ms(100) # Let the remaining buffer play out
amp_pin.value(0)
amp_pin.value(1) # Disable amp
i2s.deinit()
mclk_pwm.deinit()
f.close()