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ES8388 init optimizations and fixes

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TroyHacks 2023-04-05 11:00:14 -04:00 committed by Will Tatam
parent 693f52d984
commit b88d8c85cb
1 changed files with 18 additions and 32 deletions
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50
usermods/audioreactive/audio_source.h
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@ -492,42 +492,28 @@ class ES8388Source : public I2SSource {
}
void _es8388InitAdc() {
// This is by no means 100% figured but it's working for line-in
// with a little too much noise for my liking...
// https://dl.radxa.com/rock2/docs/hw/ds/ES8388%20user%20Guide.pdf Section 10.1
// https://docs.google.com/spreadsheets/d/1CN3MvhkcPVESuxKyx1xRYqfUit5hOdsG45St9BCUm-g/edit#gid=0 generally
_es8388I2cBegin();
_es8388I2cWrite(0x08,0x00); // I2S to slave
_es8388I2cWrite(0x02,0xf3); // Power down DEM and STM
_es8388I2cWrite(0x2b,0x80); // Set same LRCK
_es8388I2cWrite(0x00,0x05); // Set chip to Play & Record Mode
_es8388I2cWrite(0x01,0x40); // Power up Analog and lbias ... These 5 (to here) need to be done in order
_es8388I2cWrite(0x03,0x00); // Power up ADC, Analog Input, and Mic Bias
_es8388I2cWrite(0x04,0x3C); // ** In guide, not in working example tho. **
_es8388I2cWrite(0x0a,0x50); // Use Lin2/Rin2 for ADC input
_es8388I2cWrite(0x09,0x00); // Select Analog Input PGA Gain for ADC to 0dB **
_es8388I2cWrite(0x0c,0x0c); // I2S format, 24-bit
_es8388I2cWrite(0x0d,0x02); // Set MCLK/LRCK ratio to 256
_es8388I2cWrite(0x10,0x00); // Set ADC digital volume attenuation to 0dB (left)
_es8388I2cWrite(0x11,0x00); // Set ADC digital volume attenuation to 0dB (right)
_es8388I2cWrite(0x17,0x18); // Set format for DAC (I2S, 24bit)
_es8388I2cWrite(0x18,0x02); // Set DAC MCLK/LRCK ratio to 256
_es8388I2cWrite(0x1a,0x00); // DAC Volume attenuation 0dB (left)
_es8388I2cWrite(0x1b,0x00); // DAC Volume attenuation 0dB (right)
_es8388I2cWrite(0x2e,0x00); // LOUT1 volume - 00 = -45dB
_es8388I2cWrite(0x2f,0x00); // ROUT1 volume - 00 = -45dB
_es8388I2cWrite(0x0C,0b00000001); // ADC digital format - I2S + Left Justified
_es8388I2cWrite(0x17,0b00000010); // DAC digital format - I2S + Left Justified
_es8388I2cWrite(0x02,0x00); // Power up DEM and STM
// end of guide init ^^^
_es8388I2cWrite(0x02,0b01000000); // Power. Guide says it's only 6 bits but that 1 means "turn on sometthing for line-out voltage"
_es8388I2cWrite(0x04,0x0c); // LOUT2 an ROUT2 powered
// Sets ADC to around what AudioReactive expects, and loops line-in to line-out/headphone for monitoring.
_es8388I2cBegin();
_es8388I2cWrite(0x08,0x00); // I2S to slave
_es8388I2cWrite(0x02,0xf3); // Power down DEM and STM
_es8388I2cWrite(0x2b,0x80); // Set same LRCK
_es8388I2cWrite(0x00,0x05); // Set chip to Play & Record Mode
_es8388I2cWrite(0x0d,0x02); // Set MCLK/LRCK ratio to 256
_es8388I2cWrite(0x01,0x40); // Power up analog and lbias
_es8388I2cWrite(0x03,0x00); // Power up ADC, Analog Input, and Mic Bias
_es8388I2cWrite(0x0a,0x50); // Use Lin2/Rin2 for ADC input ("line-in")
_es8388I2cWrite(0x09,0x00); // Select Analog Input PGA Gain for ADC to 0dB (L+R)
_es8388I2cWrite(0x10,0b01000000); // Set ADC digital volume attenuation to -32dB (left)
_es8388I2cWrite(0x11,0b01000000); // Set ADC digital volume attenuation to -32dB (right)
_es8388I2cWrite(0x04,0x0c); // Turn on LOUT2 and ROUT2 power
_es8388I2cWrite(0x02,0b01000000); // Power up DEM and STM and undocumented bit for "turn on line-out amp"
_es8388I2cWrite(0x26,0x09); // Mixer - route LIN2/RIN2 to output
_es8388I2cWrite(0x27,0b01010000); // Mixer - route LIN to left mixer, 0dB gain
_es8388I2cWrite(0x2a,0b01010000); // Mixer - route RIN to right mixer, 0dB gain
_es8388I2cWrite(0x30,0b00011110); // LOUT2VOL - 0 = -45dB, 0b00011110 = +0dB
_es8388I2cWrite(0x31,0b00011110); // ROUT2VOL - 0 = -45dB, 0b00011110 = +0dB
_es8388I2cWrite(0x26,0x09); // Mixer
_es8388I2cWrite(0x27,0x50); // Mixer
_es8388I2cWrite(0x2a,0x50); // Mixer
_es8388I2cWrite(0x03,0x00); // Power
}
public: