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[ADAU1761] It can't sound from HP out

Hello, I'm working with the EVAL-AD2428WB1BZ which is an evaluation board for A2B.

The A2B slave generates I2S signal which has 48K / 16bit / Stereo parameters and I've configured the registers of ADAU1761 AMP IC, but it doesn't sound anything to the HP out.

The BCLK Source is from A2B IC(AD2428) with 12.288Mhz Freq. and I've configured below registers of the ADAU1761:

//PLL LOCK Acquire

0x4002:0x4007 = 0x00 0x00 0x00 0x00 0x20 0x01

//Check PLL Locking and I've checked the 0x4007 is set to 0x03.

//CORE CLOCK ENABLE from PLL

0x4000 = 0x09

//SERIAL CTRL with pulse not 50% duty cycle.

0x4015 = 0x20

//SERIAL TO DAC

0x40F2 = 0x01

//DAC Enable

0x402A = 0x03

//MIXER 3&4 Enable

0x401C = 0x21

0x401E = 0x41

//HP OUT Enable

0x4023 = 0xF7

0x4024 = 0xF7

Here is the register dump of the ADAU1761 started from 0x4000;

09 00 00 00 00 00 20 03 00 00 00 00 00 10 00 00
00 00 00 00 00 20 00 00 00 00 00 00 21 00 41 00
00 00 00 F7 F7 00 00 00 00 00 03 00 00 AA 00 AA
00 0A 3F 3F 1F 00 03 F0 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 10 00 00 01 00
00 00 00 04 00 00 01 00 00 10 00 01 00 00 00 00
00 00 01 00 00 00 00 00 00 00 00

Is there anything I need to configure more ?

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  • Hello Mr. Shin,

    If you are using ADI A2B products, I could support the A2B schematic example including ADAU1761 xml. 

     

    Please check following first.

    1. What's your A2B master board, is it ADI EVAL-AD2428WD1BZ? If so, please confirm the board revision. While rev 1.0 has ADAU1961, rev1.1 has ADAU1761. If you can see this marking on the A2B master board, I could proper project example.

    2. Have this issue happened by discovery failure? If so you could see the A2B error message pop-up, such as "Open wire, Wrong wire". Because your EVAL-AD2428WB1BZ is phantom powered slave node, you should plug out any grounded 3.5 pi stereo jack during the discovery phase. Simple ear-phone(no power) is free from the discovery failure. But connecting to powered Audio client (i.g. Powered AMP, PC AUDIO jack or Audio analyzer) may cause the discovery failure. those powered equipment should be plug into WB1BZ board after the discovery phase.

    Thank you.

  • Hi rudolph,

                      I am new to work with A2B board, I am using 2 boards EVAL-2428WD1BZ as master and EVAL- AD2428WD1BZ as slave for downstream flow.I have given optical input in master board,In slave board no clock signals and data signals are observed from AD2428 to adau1761

     *Will you kindly share me the register configurations which has to be handled in sigma studio[host]

                   

         

Reply
  • Hi rudolph,

                      I am new to work with A2B board, I am using 2 boards EVAL-2428WD1BZ as master and EVAL- AD2428WD1BZ as slave for downstream flow.I have given optical input in master board,In slave board no clock signals and data signals are observed from AD2428 to adau1761

     *Will you kindly share me the register configurations which has to be handled in sigma studio[host]

                   

         

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