Add Control_TLV for Teensy Audio Board!

7 years ago · 770ad2240b
parent 77b19f86b5
commit 770ad2240b
5 changed files with 593 additions and 1 deletions
--- a/OpenAudio_ArduinoLibrary.h
+++ b/OpenAudio_ArduinoLibrary.h
@ -1,6 +1,7 @@

 #include <AudioStream_F32.h>
 #include <AudioControlSGTL5000_Extended.h>
+#include <control_tlv320aic3206.h>
 #include <AudioConvert_F32.h>
 #include <AudioEffectGain_F32.h>
 #include <AudioEffectCompressor_F32.h>
--- a/control_tlv320aic3206.h
+++ b/control_tlv320aic3206.h
@ -0,0 +1,48 @@
+/* Extension control files for TLV320AIC3206
+ * Copyright (c) 2016, Creare, bpf@creare.com
+ *
+ *
+ */
+
+#ifndef control_tlv320_h_
+#define control_tlv320_h_
+
+#include "AudioControl.h"
+
+class AudioControlTLV320AIC3206: public AudioControl
+{
+public:
+	bool enable(void);
+	bool disable(void);
+	bool volume(float n);
+	bool inputLevel(float n);
+	bool inputSelect(int n);
+	bool micGain(float n);
+	bool setMicBias(int n);
+
+private:
+  void aic_reset(void);
+	void aic_init(void);
+  void aic_initDAC(void);
+  void aic_initADC(void);
+  unsigned int aic_readPage(uint8_t page, uint8_t reg);
+  bool aic_writePage(uint8_t page, uint8_t reg, uint8_t val);
+	bool aic_writeAddress(uint16_t address, uint8_t val);
+  bool aic_goToPage(uint8_t page);
+};
+
+#define TYMPAN_OUTPUT_HEADPHONE_JACK_OUT 1
+
+#define TYMPAN_INPUT_LINE_IN 				0
+#define TYMPAN_INPUT_JACK_AS_MIC 		1
+#define TYMPAN_INPUT_JACK_AS_LINEIN 2
+#define TYMPAN_INPUT_ON_BOARD_MIC 	3
+
+#define TYMPAN_MIC_BIAS_OFF				0
+#define TYMPAN_MIC_BIAS_1_25 			1
+#define TYMPAN_MIC_BIAS_1_7  			2
+#define TYMPAN_MIC_BIAS_2_5  			3
+#define TYMPAN_MIC_BIAS_VSUPPLY 	4
+#define TYMPAN_DEFAULT_MIC_BIAS TYMPAN_MIC_BIAS_2_5
+
+#endif
--- a/control_tlv320aic_3206.cpp
+++ b/control_tlv320aic_3206.cpp
@ -0,0 +1,472 @@
+/* Extension control files for TLV320AIC3206
+ * Copyright (c) 2016, Creare, bpf@creare.com
+ *
+ *
+ */
+
+#include "control_tlv320aic3206.h"
+#include <Wire.h>
+
+//********************************  Constants  *******************************//
+
+#define AIC3206_I2C_ADDR                                             0x18
+
+
+#ifndef AIC_FS
+#  define AIC_FS                                                     44100UL
+#endif
+
+#define AIC_BITS                                                        16
+
+#define AIC_I2S_SLAVE                                                     1
+#if AIC_I2S_SLAVE
+// Direction of BCLK and WCLK (reg 27) is input if a slave:
+# define AIC_CLK_DIR                                                    0
+#else
+// If master, make outputs:
+# define AIC_CLK_DIR                                                   0x0C
+#endif
+
+//#ifndef AIC_CODEC_CLKIN_BCLK
+//# define AIC_CODEC_CLKIN_BCLK                                           0
+//#endif
+
+//**************************** Clock Setup **********************************//
+
+//**********************************  44100  *********************************//
+#if AIC_FS == 44100
+
+// MCLK = 180000000 * 16 / 255 = 11.294117 MHz // FROM TEENSY, FIXED
+
+// PLL setup.  PLL_OUT = MCLK * R * J.D / P
+//// J.D = 7.5264, P = 1, R = 1 => 90.32 MHz // FROM 12MHz CHA AND WHF //
+// J.D = 7.9968, P = 1, R = 1 => 90.3168 MHz // For 44.1kHz exact
+// J.D = 8.0000000002, P = 1, R = 1 => 9.35294117888MHz // for TEENSY 44.11764706kHz
+#define PLL_J                                                             8
+#define PLL_D                                                             0
+
+// Bitclock divisor.
+// BCLK = DAC_CLK/N = PLL_OUT/NDAC/N = 32*fs or 16*fs
+// PLL_OUT = fs*NDAC*MDAC*DOSR
+// BLCK = 32*fs = 1411200 = PLL
+#if AIC_BITS == 16
+#define BCLK_N                                                            8
+#elif AIC_BITS == 32
+#define BCLK_N                                                            4
+#endif
+
+// ADC/DAC FS setup.
+// ADC_MOD_CLK = CODEC_CLKIN / (NADC * MADC)
+// DAC_MOD_CLK = CODEC_CLKIN / (NDAC * MDAC)
+// ADC_FS = PLL_OUT / (NADC*MADC*AOSR)
+// DAC_FS = PLL_OUT / (NDAC*MDAC*DOSR)
+// FS = 90.3168MHz / (8*2*128) = 44100 Hz.
+// MOD = 90.3168MHz / (8*2) = 5644800 Hz
+
+// Actual from Teensy: 44117.64706Hz * 128 => 5647058.82368Hz * 8*2 => 90352941.17888Hz
+
+// DAC clock config.
+// Note: MDAC*DOSR/32 >= RC, where RC is 8 for the default filter.
+// See Table 2-21
+// http://www.ti.com/lit/an/slaa463b/slaa463b.pdf
+// PB1 - RC = 8.  Use M8, N2
+// PB25 - RC = 12.  Use M8, N2
+
+#define DOSR                                                            128
+#define NDAC                                                              2
+#define MDAC                                                              8
+
+#define AOSR                                                            128
+#define NADC                                                              2
+#define MADC                                                              8
+
+// Signal Processing Modes, Playback and Recording.
+#define PRB_P                                                             1
+#define PRB_R                                                             1
+
+#endif // end fs if block
+
+//**************************** Chip Setup **********************************//
+
+//******************* INPUT DEFINITIONS *****************************//
+// MIC routing registers
+#define TYMPAN_MICPGA_LEFT_POSITIVE_REG  0x0134 // page 1 register 52
+#define TYMPAN_MICPGA_LEFT_NEGATIVE_REG  0x0136 // page 1 register 54
+#define TYMPAN_MICPGA_RIGHT_POSITIVE_REG 0x0137 // page 1 register 55
+#define TYMPAN_MICPGA_RIGHT_NEGATIVE_REG 0x0139 // page 1 register 57
+
+#define TYMPAN_MIC_ROUTING_POSITIVE_IN1     0b11000000 //
+#define TYMPAN_MIC_ROUTING_POSITIVE_IN2     0b00110000 //
+#define TYMPAN_MIC_ROUTING_POSITIVE_IN3     0b00001100 //
+#define TYMPAN_MIC_ROUTING_POSITIVE_REVERSE 0b00000011 //
+
+#define TYMPAN_MIC_ROUTING_NEGATIVE_CM_TO_CM1L  0b11000000 //
+#define TYMPAN_MIC_ROUTING_NEGATIVE_IN2_REVERSE 0b00110000 //
+#define TYMPAN_MIC_ROUTING_NEGATIVE_IN3_REVERSE 0b00001100 //
+#define TYMPAN_MIC_ROUTING_NEGATIVE_CM_TO_CM2L  0b00000011 //
+
+#define TYMPAN_MIC_ROUTING_RESISTANCE_10k 0b01010101
+#define TYMPAN_MIC_ROUTING_RESISTANCE_20k 0b10101010
+#define TYMPAN_MIC_ROUTING_RESISTANCE_40k 0b11111111
+#define TYMPAN_MIC_ROUTING_RESISTANCE_DEFAULT TYMPAN_MIC_ROUTING_RESISTANCE_10k
+
+#define TYMPAN_MICPGA_LEFT_VOLUME_REG    0x013B // page 1 register 59 // 0 to 47.5dB in 0.5dB steps
+#define TYMPAN_MICPGA_RIGHT_VOLUME_REG   0x013C // page 1 register 60 // 0 to 47.5dB in 0.5dB steps
+
+#define TYMPAN_MICPGA_VOLUME_ENABLE  0x00 // default is 0b11000000 - clear to 0 to enable
+
+#define TYMPAN_MIC_BIAS_REG 0x0133 // page 1 reg 51
+#define TYMPAN_MIC_BIAS_POWER_ON  0x40
+#define TYMPAN_MIC_BIAS_POWER_OFF 0x00
+#define TYMPAN_MIC_BIAS_OUTPUT_VOLTAGE_1_25     0x00
+#define TYMPAN_MIC_BIAS_OUTPUT_VOLTAGE_1_7      0x01
+#define TYMPAN_MIC_BIAS_OUTPUT_VOLTAGE_2_5      0x10
+#define TYMPAN_MIC_BIAS_OUTPUT_VOLTAGE_VSUPPLY  0x11
+
+#define TYMPAN_ADC_PROCESSING_BLOCK_REG 0x003d // page 0 register 61
+
+#define TYMPAN_ADC_CHANNEL_POWER_REG 0x0051 // page 0 register81
+#define TYMPAN_ADC_CHANNELS_ON 0b11000000 // power up left and right
+
+#define TYMPAN_ADC_MUTE_REG 0x0052 //  page 0, register 82
+#define TYMPAN_ADC_UNMUTE 0x00
+
+bool AudioControlTLV320AIC3206::enable(void)
+{
+  delay(100);
+
+  // Setup for Master mode, pins 18/19, external pullups, 400kHz, 200ms default timeout
+	Wire.begin();
+	delay(5);
+
+  aic_reset(); delay(100);
+	aic_init(); delay(100);
+  aic_initADC(); delay(100);
+  aic_initDAC(); delay(100);
+
+  aic_readPage(0, 27); // check a specific register - a register read test
+
+  Serial.println("TLV320 enable done");
+
+  return true;
+
+}
+
+bool AudioControlTLV320AIC3206::disable(void) {
+  return true;
+}
+
+bool AudioControlTLV320AIC3206::inputLevel(float volume) {
+  return false;
+}
+
+bool AudioControlTLV320AIC3206::inputSelect(int n) {
+  if (n == TYMPAN_INPUT_LINE_IN) {
+    // USE LINE IN SOLDER PADS
+    aic_writeAddress(TYMPAN_MICPGA_LEFT_POSITIVE_REG, TYMPAN_MIC_ROUTING_POSITIVE_IN1 & TYMPAN_MIC_ROUTING_RESISTANCE_DEFAULT);
+    aic_writeAddress(TYMPAN_MICPGA_LEFT_NEGATIVE_REG, TYMPAN_MIC_ROUTING_NEGATIVE_CM_TO_CM1L & TYMPAN_MIC_ROUTING_RESISTANCE_DEFAULT);
+    aic_writeAddress(TYMPAN_MICPGA_RIGHT_POSITIVE_REG, TYMPAN_MIC_ROUTING_POSITIVE_IN1 & TYMPAN_MIC_ROUTING_RESISTANCE_DEFAULT);
+    aic_writeAddress(TYMPAN_MICPGA_RIGHT_NEGATIVE_REG, TYMPAN_MIC_ROUTING_NEGATIVE_CM_TO_CM1L & TYMPAN_MIC_ROUTING_RESISTANCE_DEFAULT);
+    // BIAS OFF
+    setMicBias(TYMPAN_MIC_BIAS_OFF);
+
+    Serial.println("Set Audio Input to Line In");
+    return true;
+  } else if (n == TYMPAN_INPUT_JACK_AS_MIC) {
+    // mic-jack = IN3
+    aic_writeAddress(TYMPAN_MICPGA_LEFT_POSITIVE_REG, TYMPAN_MIC_ROUTING_POSITIVE_IN3 & TYMPAN_MIC_ROUTING_RESISTANCE_DEFAULT);
+    aic_writeAddress(TYMPAN_MICPGA_LEFT_NEGATIVE_REG, TYMPAN_MIC_ROUTING_NEGATIVE_CM_TO_CM1L & TYMPAN_MIC_ROUTING_RESISTANCE_DEFAULT);
+    aic_writeAddress(TYMPAN_MICPGA_RIGHT_POSITIVE_REG, TYMPAN_MIC_ROUTING_POSITIVE_IN3 & TYMPAN_MIC_ROUTING_RESISTANCE_DEFAULT);
+    aic_writeAddress(TYMPAN_MICPGA_RIGHT_NEGATIVE_REG, TYMPAN_MIC_ROUTING_NEGATIVE_CM_TO_CM1L & TYMPAN_MIC_ROUTING_RESISTANCE_DEFAULT);
+    // BIAS on, using default
+    setMicBias(TYMPAN_DEFAULT_MIC_BIAS);
+
+    Serial.println("Set Audio Input to JACK AS MIC, BIAS SET TO DEFAULT 2.5V");
+    return true;
+  } else if (n == TYMPAN_INPUT_JACK_AS_LINEIN) {
+    // 1
+    // mic-jack = IN3
+    aic_writeAddress(TYMPAN_MICPGA_LEFT_POSITIVE_REG, TYMPAN_MIC_ROUTING_POSITIVE_IN3 & TYMPAN_MIC_ROUTING_RESISTANCE_DEFAULT);
+    aic_writeAddress(TYMPAN_MICPGA_LEFT_NEGATIVE_REG, TYMPAN_MIC_ROUTING_NEGATIVE_CM_TO_CM1L & TYMPAN_MIC_ROUTING_RESISTANCE_DEFAULT);
+    aic_writeAddress(TYMPAN_MICPGA_RIGHT_POSITIVE_REG, TYMPAN_MIC_ROUTING_POSITIVE_IN3 & TYMPAN_MIC_ROUTING_RESISTANCE_DEFAULT);
+    aic_writeAddress(TYMPAN_MICPGA_RIGHT_NEGATIVE_REG, TYMPAN_MIC_ROUTING_NEGATIVE_CM_TO_CM1L & TYMPAN_MIC_ROUTING_RESISTANCE_DEFAULT);
+    // BIAS Off
+    setMicBias(TYMPAN_MIC_BIAS_OFF);
+
+    Serial.println("Set Audio Input to JACK AS LINEIN, BIAS OFF");
+    return true;
+  } else if (n == TYMPAN_INPUT_ON_BOARD_MIC) {
+    // on-board = IN2
+    aic_writeAddress(TYMPAN_MICPGA_LEFT_POSITIVE_REG, TYMPAN_MIC_ROUTING_POSITIVE_IN2 & TYMPAN_MIC_ROUTING_RESISTANCE_DEFAULT);
+    aic_writeAddress(TYMPAN_MICPGA_LEFT_NEGATIVE_REG, TYMPAN_MIC_ROUTING_NEGATIVE_CM_TO_CM1L & TYMPAN_MIC_ROUTING_RESISTANCE_DEFAULT);
+    aic_writeAddress(TYMPAN_MICPGA_RIGHT_POSITIVE_REG, TYMPAN_MIC_ROUTING_POSITIVE_IN2 & TYMPAN_MIC_ROUTING_RESISTANCE_DEFAULT);
+    aic_writeAddress(TYMPAN_MICPGA_RIGHT_NEGATIVE_REG, TYMPAN_MIC_ROUTING_NEGATIVE_CM_TO_CM1L & TYMPAN_MIC_ROUTING_RESISTANCE_DEFAULT);
+    // BIAS Off
+    setMicBias(TYMPAN_MIC_BIAS_OFF);
+    Serial.println("Set Audio Input to Tympan On-Board MIC, BIAS OFF");
+
+    return true;
+  }
+  Serial.print("ERROR: Unable to Select Input - Value not supported: ");
+  Serial.println(n);
+  return false;
+}
+
+bool AudioControlTLV320AIC3206::setMicBias(int n) {
+  if (n == TYMPAN_MIC_BIAS_1_25) {
+    aic_writeAddress(TYMPAN_MIC_BIAS_REG, TYMPAN_MIC_BIAS_POWER_ON | TYMPAN_MIC_BIAS_OUTPUT_VOLTAGE_1_25); // power up mic bias
+    return true;
+  } else if (n == TYMPAN_MIC_BIAS_1_7) {
+    aic_writeAddress(TYMPAN_MIC_BIAS_REG, TYMPAN_MIC_BIAS_POWER_ON | TYMPAN_MIC_BIAS_OUTPUT_VOLTAGE_1_7); // power up mic bias
+    return true;
+  } else if (n == TYMPAN_MIC_BIAS_2_5) {
+    aic_writeAddress(TYMPAN_MIC_BIAS_REG, TYMPAN_MIC_BIAS_POWER_ON | TYMPAN_MIC_BIAS_OUTPUT_VOLTAGE_2_5); // power up mic bias
+    return true;
+  } else if (n == TYMPAN_MIC_BIAS_VSUPPLY) {
+    aic_writeAddress(TYMPAN_MIC_BIAS_REG, TYMPAN_MIC_BIAS_POWER_ON | TYMPAN_MIC_BIAS_OUTPUT_VOLTAGE_VSUPPLY); // power up mic bias
+    return true;
+  } else if (n == TYMPAN_MIC_BIAS_OFF) {
+    aic_writeAddress(TYMPAN_MIC_BIAS_REG, TYMPAN_MIC_BIAS_POWER_OFF); // power up mic bias
+    return true;
+  }
+  Serial.print("ERROR: Unable to set MIC BIAS - Value not supported: ");
+  Serial.println(n);
+  return false;
+}
+
+void AudioControlTLV320AIC3206::aic_reset() {
+  Serial.println("INFO: Reseting AIC");
+  aic_writePage(0x00, 0x01, 0x01);
+  // aic_writeAddress(0x0001, 0x01);
+
+  delay(10);
+}
+
+
+// example - turn on IN3 - mic jack, with negatives routed to CM1L and with 10k resistance
+// aic_writeAddress(TYMPAN_LEFT_MICPGA_POSITIVE_REG, TYMPAN_MIC_ROUTING_POSITIVE_IN3 & TYMPAN_MIC_ROUTING_RESISTANCE_DEFAULT);
+// aic_writeAddress(TYMPAN_LEFT_MICPGA_NEGATIVE_REG, TYMPAN_MIC_ROUTING_NEGATIVE_CM_TO_CM1L & TYMPAN_MIC_ROUTING_RESISTANCE_DEFAULT);
+// aic_writeAddress(TYMPAN_RIGHT_MICPGA_POSITIVE_REG, TYMPAN_MIC_ROUTING_POSITIVE_IN3 & TYMPAN_MIC_ROUTING_RESISTANCE_DEFAULT);
+// aic_writeAddress(TYMPAN_RIGHT_MICPGA_NEGATIVE_REG, TYMPAN_MIC_ROUTING_NEGATIVE_CM_TO_CM1L & TYMPAN_MIC_ROUTING_RESISTANCE_DEFAULT);
+
+void AudioControlTLV320AIC3206::aic_initADC() {
+  Serial.println("INFO: Initializing AIC ADC");
+  aic_writeAddress(TYMPAN_ADC_PROCESSING_BLOCK_REG, PRB_R);  // processing blocks - ADC
+  aic_writePage(1, 61, 0); // 0x3D // Select ADC PTM_R4 Power Tune?
+  aic_writePage(1, 71, 0b00110001); // 0x47 // Set MicPGA startup delay to 3.1ms
+  aic_writeAddress(TYMPAN_MIC_BIAS_REG, TYMPAN_MIC_BIAS_POWER_ON | TYMPAN_MIC_BIAS_2_5); // power up mic bias
+
+  aic_writeAddress(TYMPAN_MICPGA_LEFT_POSITIVE_REG, TYMPAN_MIC_ROUTING_POSITIVE_IN2 & TYMPAN_MIC_ROUTING_RESISTANCE_DEFAULT);
+  aic_writeAddress(TYMPAN_MICPGA_LEFT_NEGATIVE_REG, TYMPAN_MIC_ROUTING_NEGATIVE_CM_TO_CM1L & TYMPAN_MIC_ROUTING_RESISTANCE_DEFAULT);
+  aic_writeAddress(TYMPAN_MICPGA_RIGHT_POSITIVE_REG, TYMPAN_MIC_ROUTING_POSITIVE_IN2 & TYMPAN_MIC_ROUTING_RESISTANCE_DEFAULT);
+  aic_writeAddress(TYMPAN_MICPGA_RIGHT_NEGATIVE_REG, TYMPAN_MIC_ROUTING_NEGATIVE_CM_TO_CM1L & TYMPAN_MIC_ROUTING_RESISTANCE_DEFAULT);
+
+  aic_writeAddress(TYMPAN_MICPGA_LEFT_VOLUME_REG, TYMPAN_MICPGA_VOLUME_ENABLE); // enable Left MicPGA, set gain to 0 dB
+  aic_writeAddress(TYMPAN_MICPGA_RIGHT_VOLUME_REG, TYMPAN_MICPGA_VOLUME_ENABLE); // enable Right MicPGA, set gain to 0 dB
+
+  aic_writeAddress(TYMPAN_ADC_MUTE_REG, TYMPAN_ADC_UNMUTE); // Unmute Left and Right ADC Digital Volume Control
+  aic_writeAddress(TYMPAN_ADC_CHANNEL_POWER_REG, TYMPAN_ADC_CHANNELS_ON); // Unmute Left and Right ADC Digital Volume Control
+}
+
+// set MICPGA volume, 0-47.5dB in 0.5dB setps
+bool AudioControlTLV320AIC3206::micGain(float volume) {
+  if (volume < 0.0) {
+    volume = 0.0; // 0.0 dB
+    Serial.println("WARNING: Attempting to set MIC volume outside range");
+  }
+  if (volume > 47.5) {
+    volume = 47.5; // 47.5 dB
+    Serial.println("WARNING: Attempting to set MIC volume outside range");
+  }
+
+  Serial.print("INFO: Setting MIC volume to ");
+  Serial.print(volume, 1);
+
+  volume = volume * 2.0; // convert to value map (0.5 dB steps)
+  int8_t volume_int = (int8_t) (round(volume)); // round
+
+  Serial.print(".  Converted to volume map => ");
+  Serial.println(volume_int);
+
+  aic_writeAddress(TYMPAN_MICPGA_LEFT_VOLUME_REG, TYMPAN_MICPGA_VOLUME_ENABLE | volume_int); // enable Left MicPGA, set gain to 0 dB
+  aic_writeAddress(TYMPAN_MICPGA_RIGHT_VOLUME_REG, TYMPAN_MICPGA_VOLUME_ENABLE | volume_int); // enable Right MicPGA, set gain to 0 dB
+  return true;
+}
+
+//******************* OUTPUT DEFINITIONS *****************************//
+#define TYMPAN_DAC_PROCESSING_BLOCK_REG 0x003c // page 0 register 60
+#define TYMPAN_DAC_VOLUME_LEFT_REG 0x0041 // page 0 reg 65
+#define TYMPAN_DAC_VOLUME_RIGHT_REG 0x0042 // page 0 reg 66
+
+// -63.6 to +24 dB in 0.5dB steps.  uses signed 8-bit
+bool AudioControlTLV320AIC3206::volume(float volume) {
+
+  // Constrain to limits
+  if (volume > 24.0) {
+    volume = 24.0;
+    Serial.println("WARNING: Attempting to set DAC Volume outside range");
+  }
+  if (volume < -63.5) {
+    volume = -63.5;
+    Serial.println("WARNING: Attempting to set DAC Volume outside range");
+  }
+
+  Serial.print("INFO: Setting DAC volume to ");
+  Serial.print(volume, 1);
+
+  volume = volume * 2.0; // convert to value map (0.5 dB steps)
+  int8_t volume_int = (int8_t) (round(volume)); // round
+
+  Serial.print(".  Converted to volume map => ");
+  Serial.println(volume_int);
+
+  aic_writeAddress(TYMPAN_DAC_VOLUME_RIGHT_REG, volume_int);
+  aic_writeAddress(TYMPAN_DAC_VOLUME_LEFT_REG, volume_int);
+  return true;
+}
+
+void AudioControlTLV320AIC3206::aic_initDAC() {
+  Serial.println("INFO: Initializing AIC DAC");
+  // PLAYBACK SETUP
+
+  aic_writeAddress(TYMPAN_DAC_PROCESSING_BLOCK_REG, PRB_P); // processing blocks - DAC
+
+  //aic_writePage(1, 20, 0x25); // 0x14 De-Pop
+  aic_writePage(1, 12, 8); // route LDAC/RDAC to HPL/HPR
+  aic_writePage(1, 13, 8); // route LDAC/RDAC to HPL/HPR
+  aic_writePage(0, 63, 0xD6); // 0x3F // Power up LDAC/RDAC
+//  aic_writePage(1, 14, 8); // route LDAC/RDAC to LOL/LOR
+//  aic_writePage(1, 15, 8); // route LDAC/RDAC to LOL/LOR
+  aic_writePage(1, 16, 0); // unmute HPL Driver, 0 gain
+  aic_writePage(1, 17, 0); // unmute HPR Driver, 0 gain
+//  aic_writePage(1, 18, 0); // unmute LOL Driver, 0 gain
+//  aic_writePage(1, 19, 0); // unmute LOR Driver, 0 gain
+  aic_writePage(1, 9, 0x30); // Power up HPL/HPR and LOL/LOR drivers
+  delay(100);
+  aic_writeAddress(TYMPAN_DAC_VOLUME_LEFT_REG,  0); // default to 0 dB
+  aic_writeAddress(TYMPAN_DAC_VOLUME_RIGHT_REG, 0); // default to 0 dB
+  aic_writePage(0, 64, 0); // 0x40 // Unmute LDAC/RDAC
+}
+
+void AudioControlTLV320AIC3206::aic_init() {
+  Serial.println("INFO: Initializing AIC");
+
+  // PLL
+  aic_writePage(0, 4, 3); // 0x04 low PLL clock range, MCLK is PLL input, PLL_OUT is CODEC_CLKIN
+  aic_writePage(0, 5, (PLL_J != 0 ? 0x91 : 0x11));
+  aic_writePage(0, 6, PLL_J);
+  aic_writePage(0, 7, PLL_D >> 8);
+  aic_writePage(0, 8, PLL_D &0xFF);
+
+  // CLOCKS
+  aic_writePage(0, 11, 0x80 | NDAC); // 0x0B
+  aic_writePage(0, 12, 0x80 | MDAC); // 0x0C
+  aic_writePage(0, 13, 0); // 0x0D
+  aic_writePage(0, 14, DOSR); // 0x0E
+  // aic_writePage(0, 18, 0); // 0x12 // powered down, ADC_CLK same as DAC_CLK
+  // aic_writePage(0, 19, 0); // 0x13 // powered down, ADC_MOD_CLK same as DAC_MOD_CLK
+  aic_writePage(0, 18, 0x80 | NADC); // 0x12
+  aic_writePage(0, 19, 0x80 | MADC); // 0x13
+  aic_writePage(0, 20, AOSR);
+  aic_writePage(0, 30, 0x80 | BCLK_N); // power up BLCK N Divider, default is 128
+
+  // POWER
+  aic_writePage(1, 1, 8); // 0x01
+  aic_writePage(1, 2, 0); // 0x02 Enable Master Analog Power Control
+  aic_writePage(1, 10, 0); // common mode 0.9 for full chip, HP, LO  // from WHF/CHA
+  aic_writePage(1, 71, 0x31); // 0x47 Set input power-up time to 3.1ms (for ADC)
+  aic_writePage(1, 123, 1); // 0x7B Set reference to power up in 40ms when analog blocks are powered up
+  //aic_writePage(1, 124, 6); // 0x7D Charge Pump
+  aic_writePage(1, 125, 0x53); // Enable ground-centered mode, DC offset correction  // from WHF/CHA
+
+  // !!!!!!!!! The below writes are from WHF/CHA - probably don't need?
+  // aic_writePage(1, 1, 10); // 0x01 // Charge pump
+ aic_writePage(0, 27, 0x01 | AIC_CLK_DIR | (AIC_BITS == 32 ? 0x30 : 0)); // 0x1B
+  // aic_writePage(0, 28, 0); // 0x1C
+}
+
+unsigned int AudioControlTLV320AIC3206::aic_readPage(uint8_t page, uint8_t reg)
+{
+  unsigned int val;
+  if (aic_goToPage(page)) {
+    Wire.beginTransmission(AIC3206_I2C_ADDR);
+    Wire.write(reg);
+    unsigned int result = Wire.endTransmission();
+    if (result != 0) {
+      Serial.print("ERROR: Read Page.  Page: ");Serial.print(page);
+      Serial.print(" Reg: ");Serial.print(reg);
+      Serial.print(".  Received Error During Read Page: ");
+      Serial.println(result);
+      val = 300 + result;
+      return val;
+    }
+    if (Wire.requestFrom(AIC3206_I2C_ADDR, 1) < 1) {
+      Serial.print("ERROR: Read Page.  Page: ");Serial.print(page);
+      Serial.print(" Reg: ");Serial.print(reg);
+      Serial.println(".  Nothing to return");
+      val = 400;
+      return val;
+    }
+    if (Wire.available() >= 1) {
+      uint16_t val = Wire.read();
+      Serial.print("INFO: Read Page.  Page: ");Serial.print(page);
+      Serial.print(" Reg: ");Serial.print(reg);
+      Serial.print(".  Received: ");
+      Serial.println(val, HEX);
+      return val;
+    }
+  } else {
+    Serial.print("INFO: Read Page.  Page: ");Serial.print(page);
+    Serial.print(" Reg: ");Serial.print(reg);
+    Serial.println(".  Failed to go to read page.  Could not go there");
+    val = 500;
+    return val;
+  }
+  val = 600;
+  return val;
+}
+
+bool AudioControlTLV320AIC3206::aic_writeAddress(uint16_t address, uint8_t val) {
+  uint8_t reg = (uint8_t) (address & 0xFF);
+  uint8_t page = (uint8_t) ((address >> 8) & 0xFF);
+
+  return aic_writePage(page, reg, val);
+}
+
+bool AudioControlTLV320AIC3206::aic_writePage(uint8_t page, uint8_t reg, uint8_t val) {
+  Serial.print("INFO: Write Page.  Page: ");Serial.print(page);
+  Serial.print(" Reg: ");Serial.print(reg);
+  Serial.print(" Val: ");Serial.println(val);
+  if (aic_goToPage(page)) {
+    Wire.beginTransmission(AIC3206_I2C_ADDR);
+    Wire.write(reg);delay(10);
+    Wire.write(val);delay(10);
+    uint8_t result = Wire.endTransmission();
+    if (result == 0) return true;
+    else {
+      Serial.print("ERROR: Received Error During Write Page: ");
+      Serial.println(result);
+    }
+  }
+  return false;
+}
+
+bool AudioControlTLV320AIC3206::aic_goToPage(byte page) {
+  Wire.beginTransmission(AIC3206_I2C_ADDR);
+  Wire.write(0x00); delay(10);// page register
+  Wire.write(page); delay(10);// go to page
+  byte result = Wire.endTransmission();
+  if (result != 0) {
+    Serial.print("ERROR: Received Error During GoTo Page: ");
+    Serial.println(result);
+    if (result == 2) {
+      // failed to transmit address
+      //return aic_goToPage(page);
+    } else if (result == 3) {
+      // failed to transmit data
+      //return aic_goToPage(page);
+    }
+    return false;
+  }
+  return true;
+}
--- a/examples/Tympan_TLV320AIC/Tympan_TLV320AIC.ino
+++ b/examples/Tympan_TLV320AIC/Tympan_TLV320AIC.ino
@ -0,0 +1,65 @@
+/*
+ * Tympan_TLV320AIC.ino
+ * 
+ * Created: BPF and WEA, Creare LLC, Jan/Feb 2017
+ * Purpose: Demonstrate basic audio pass-thru using the Tympan Audio Board,
+ *     which is based on the TI TLV320AIC3206
+ * 
+ * License: MIT License, Use At Your Own Risk
+ * 
+ */
+
+#include <Audio.h>
+#include <Wire.h>
+#include <SPI.h>
+#include <SD.h>
+#include <SerialFlash.h>
+#include <OpenAudio_ArduinoLibrary.h>  //AudioControlTLV320AIC3206 lives here
+
+// define audio classes and connections
+AudioControlTLV320AIC3206       tlv320aic3206_1;
+AudioInputI2S       audioInput; 
+AudioOutputI2S      audioOutput;  
+AudioConnection          patchCord1(audioInput, 0, audioOutput, 0);
+AudioConnection          patchCord2(audioInput, 1, audioOutput, 1);
+
+// define the setup
+void setup(void)
+{
+  //allocate the audio memory first
+  AudioMemory(160);  //big number to accomodate the delay effect
+
+  //begin the serial comms
+  Serial.begin(115200);
+  delay(500);
+  Serial.println("Tympan_TLV320AIC: starting...");
+  
+  // Setup the TLV320
+  tlv320aic3206_1.enable(); // activate AIC
+
+  // Choose the desired input
+  tlv320aic3206_1.inputSelect(TYMPAN_INPUT_ON_BOARD_MIC); // use the on board microphones // default
+  //  tlv320aic3206_1.inputSelect(TYMPAN_INPUT_JACK_AS_MIC); // use the microphone jack - defaults to mic bias 2.5V
+  //  tlv320aic3206_1.inputSelect(TYMPAN_INPUT_JACK_AS_LINEIN); // use the microphone jack - defaults to mic bias OFF
+  //  tlv320aic3206_1.inputSelect(TYMPAN_INPUT_LINE_IN); // use the line in pads on the TYMPAN board - defaults to mic bias OFF
+
+  //Adjust the MIC bias, if using TYMPAN_INPUT_JACK_AS_MIC
+  //  tlv320aic3206_1.setMicBias(TYMPAN_MIC_BIAS_OFF); // Turn mic bias off
+  //  tlv320aic3206_1.setMicBias(TYMPAN_MIC_BIAS_2_5); // set mic bias to 2.5 // default
+  //  tlv320aic3206_1.setMicBias(TYMPAN_MIC_BIAS_1_7); // set mic bias to 1.7
+  //  tlv320aic3206_1.setMicBias(TYMPAN_MIC_BIAS_1_25); // set mic bias to 1.25
+  //  tlv320aic3206_1.setMicBias(TYMPAN_MIC_BIAS_VSUPPLY); // set mic bias to supply voltage
+
+  // VOLUMES
+  tlv320aic3206_1.volume(10);  // -63.6 to +24 dB in 0.5dB steps.  uses float
+  tlv320aic3206_1.micGain(10); // set MICPGA volume, 0-47.5dB in 0.5dB setps
+
+  Serial.println("Done");
+}
+
+void loop(void)
+{
+  // Nothing to do - just looping input to output
+  delay(2000);
+  Serial.println("Running...");
+}
--- a/keywords.txt
+++ b/keywords.txt
@ -20,5 +20,11 @@ AudioMixer4_F32		KEYWORD1
 AudioMultiply_F32	KEYWORD1
 AudioSynthWaveform_F32	KEYWORD1

+AudioControlTLV320AIC3206	KEYWORD1
+inputSelect		KEYWORD2
+setMicBias		KEYWORD2
+volume			KEYWORD2
+micGain			KEYWORD2
+
 AudioControlSGTL5000_Extended	KEYWORD1
-micBiasEnable		KEYWORD2
+micBiasEnable		KEYWORD2