Hook up guide for WM8731

[sriranjanr]

Hello,

I am trying to work with WM8731. Is there a hook up guide to arduino due which is running your Hi-Fi lib. If you could provide in formation on which pins to connect to Due or a table indicating that then it would be great. I have seen the other issue pertaining to WM8731 where in he uses the codec from Mikro and another library for configuring the WM8731 using I2C but I dont think that connection tells about the HiFi libs connections because as you mentioned HiFi uses SSC pins.But there are only two SSC pins on the Due , so what about the other pins on the codec shield. I am using the codec shield from Sparkfun.

[michael-hirschmugl]

WM8731 <-> ARDUINO DUE
BCLK - Pin 3 <-> TK - Pin 7
DACDAT - Pin 4 <-> TD - Pin 78
DACLRC - Pin 5 <-> TF - Pin 8
BCLK - Pin 3 <-> RK - Pin 90
ADCDAT - Pin 6 <-> RD - Pin 89
ADCLRC - Pin 7 <-> RF - Pin 88

don't forget to use a resistor of about 220 Ohm between signals. :)
I will upload a dedicated library and documentation for he WM8731 soon. I had a lot of issues with this chip...

[benbiles]

Hi Hirschmensch!

I have a Mikroe-506 with this codec wired up to DUE with working I2C control but passthough not working in passthrough example

I have noticed the CLKOUT 12.288mhz pin on this board is left floating, I could solder on a wire for 12.288mhz MCLK but to which pin should MCLK go to on the the DUE or its not needed?

Is this library finding MCLK by multiplying BCLK with ... ?

Either way , its not working for me ! are you any nearer to getting the Passthrough example working with codec ?

[benbiles]

EDIT: ok this is working now :) I'll paste the code below
Mikroe-506 pin connections are above.

Why and who would design the Mikroe-506 without Line inputs connected etc I will nver know :)

I am getting on the scope using 220ohm resistors in series on all outputs. ( looks cleaner on scope )

I am using 48khz 32bit.

3.0722mhz on BCLK
TK - Pin 7
TF - Pin 8

48.0034khz on
DACLRC ,
TF - Pin 8
ADCLRC
RF - Pin 88

370khz data
DACDAT
TD - Pin 78
ADCDAT
RD - Pin 89

Here is my code,

`// Initialize the WM8731
Serial.println( "Initializing" );
delay(10);

Wire.begin();
Wire.beginTransmission(0x1e);
Wire.write(0x1e); // reset reg
Wire.write(B00000000); // do reset
Wire.endTransmission();

// delay(50);

Wire.begin();
Wire.beginTransmission(0x1a);
Wire.write(0x0c); // power reduction register
Wire.write(0x00); // turn everything on
Wire.endTransmission();

delay(10);

Wire.beginTransmission(0x1a);
Wire.write(0x0e); // digital data format REG 00001110 0x0e
#if BIT_RATE == 32
Wire.write(0x72); // 32bit,MASTER MODE 01110010 left justified
#elif BIT_RATE == 24
Wire.write(0x62); // 24bit,MASTER MODE 01100010 left justified
#elif BIT_RATE == 16
Wire.write(0x42); // 16bit,MASTER MODE 01000010 left justified
#endif
Wire.endTransmission();

delay(10);

Wire.beginTransmission(0x1a);

Wire.write(0x10); // clock configuration
#if SAMPLE_RATE == 88
Wire.write(0xbc);
#elif SAMPLE_RATE == 48
Wire.write(0x00);
#elif SAMPLE_RATE == 44
Wire.write(0xa0);
#elif SAMPLE_RATE == 22
Wire.write(0xe0);
#elif SAMPLE_RATE == 8
Wire.write(0xac);
#elif SAMPLE_RATE == 2
Wire.write(0xce);
#endif
Wire.endTransmission();

delay(10);

Wire.beginTransmission(0x1a);
Wire.write(0x12); // digital interface active
Wire.write(0x01);
Wire.endTransmission();

delay(10);

Wire.beginTransmission(0x1a);

Wire.write(0x0a); // digital audio path configuration
Wire.write((uint8_t)ADCHPD);
Wire.endTransmission();

delay(10);

Wire.beginTransmission(0x1a);
Wire.write(0x00); // left in setup register
Wire.write((uint8_t)LINVOL);
Wire.endTransmission();

delay(10);

Wire.beginTransmission(0x1a);
Wire.write(0x02); // right in setup register
Wire.write((uint8_t)RINVOL);
Wire.endTransmission();

delay(10);

Wire.beginTransmission(0x1a);
Wire.write(0x04); // left headphone out register
Wire.write((uint8_t)LHPVOL);
Wire.endTransmission();

delay(10);

Wire.beginTransmission(0x1a);
Wire.write(0x06); // right headphone out register
Wire.write((uint8_t)RHPVOL);
Wire.endTransmission();

delay(10);

Wire.beginTransmission(0x1a);
Wire.write(0x08); // analog audio pathway configuration
Wire.write((uint8_t)((SIDEATT << 6) | (SIDETONE << 5) | (DACSEL << 4) | (BYPASS << 3) | (INSEL << 2) | (MUTEMIC << 1) | (MICBOOST << 0)));
Wire.endTransmission();

delay(50);

Serial.println( "done" );
}
// end initialisecodec`

[niradat]

EDIT: ok this is working now :) I'll paste the code below
Mikroe-506 pin connections are above.

Why and who would design the Mikroe-506 without Line inputs connected etc I will nver know :)

I am getting on the scope using 220ohm resistors in series on all outputs. ( looks cleaner on scope )

I am using 48khz 32bit.

3.0722mhz on BCLK
TK - Pin 7
TF - Pin 8

48.0034khz on
DACLRC ,
TF - Pin 8
ADCLRC
RF - Pin 88

370khz data
DACDAT
TD - Pin 78
ADCDAT
RD - Pin 89

Here is my code,

`// Initialize the WM8731
Serial.println( "Initializing" );
delay(10);

Wire.begin();
Wire.beginTransmission(0x1e);
Wire.write(0x1e); // reset reg
Wire.write(B00000000); // do reset
Wire.endTransmission();

// delay(50);

Wire.begin();
Wire.beginTransmission(0x1a);
Wire.write(0x0c); // power reduction register
Wire.write(0x00); // turn everything on
Wire.endTransmission();

delay(10);

Wire.beginTransmission(0x1a);
Wire.write(0x0e); // digital data format REG 00001110 0x0e
#if BIT_RATE == 32
Wire.write(0x72); // 32bit,MASTER MODE 01110010 left justified
#elif BIT_RATE == 24
Wire.write(0x62); // 24bit,MASTER MODE 01100010 left justified
#elif BIT_RATE == 16
Wire.write(0x42); // 16bit,MASTER MODE 01000010 left justified
#endif
Wire.endTransmission();

delay(10);

Wire.beginTransmission(0x1a);

Wire.write(0x10); // clock configuration
#if SAMPLE_RATE == 88
Wire.write(0xbc);
#elif SAMPLE_RATE == 48
Wire.write(0x00);
#elif SAMPLE_RATE == 44
Wire.write(0xa0);
#elif SAMPLE_RATE == 22
Wire.write(0xe0);
#elif SAMPLE_RATE == 8
Wire.write(0xac);
#elif SAMPLE_RATE == 2
Wire.write(0xce);
#endif
Wire.endTransmission();

delay(10);

Wire.beginTransmission(0x1a);
Wire.write(0x12); // digital interface active
Wire.write(0x01);
Wire.endTransmission();

delay(10);

Wire.beginTransmission(0x1a);

Wire.write(0x0a); // digital audio path configuration
Wire.write((uint8_t)ADCHPD);
Wire.endTransmission();

delay(10);

Wire.beginTransmission(0x1a);
Wire.write(0x00); // left in setup register
Wire.write((uint8_t)LINVOL);
Wire.endTransmission();

delay(10);

Wire.beginTransmission(0x1a);
Wire.write(0x02); // right in setup register
Wire.write((uint8_t)RINVOL);
Wire.endTransmission();

delay(10);

Wire.beginTransmission(0x1a);
Wire.write(0x04); // left headphone out register
Wire.write((uint8_t)LHPVOL);
Wire.endTransmission();

delay(10);

Wire.beginTransmission(0x1a);
Wire.write(0x06); // right headphone out register
Wire.write((uint8_t)RHPVOL);
Wire.endTransmission();

delay(10);

Wire.beginTransmission(0x1a);
Wire.write(0x08); // analog audio pathway configuration
Wire.write((uint8_t)((SIDEATT << 6) | (SIDETONE << 5) | (DACSEL << 4) | (BYPASS << 3) | (INSEL << 2) | (MUTEMIC << 1) | (MICBOOST << 0)));
Wire.endTransmission();

delay(50);

Serial.println( "done" );
}
// end initialisecodec`

Hi,
I think there is a minor printing mistake at the start of the code after delay(10). What I believe is that the address parameter in the following line Wire.beginTransmission(0x1e); should be 0x1a instead of 0x1e. Kindly verify and comment?