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[ADAU1761] It can't sound from HP out

Yongho Shin
on Sep 30, 2019

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 ?

  • 0
    •  Analog Employees 
    on Sep 30, 2019 12:55 PM

    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.

  • 0 on Oct 1, 2019 10:12 AM in reply to rudolph

    Hello,

    I'm using the v2.0 B'd which has ADAU1761, and there is no problem on the A2B link.

    I've proceeded to discovery the slave and can access to the ADAU1761's registers via the I2C.

    Today, I've solved to turn on the amplifier and can sound the source comming from the A2B master but it is little noisy.

    So, I wonder now which registers I should configure to properly sound out the serial input source which has 16bit/48K/2CH.

    The slave A2B (AD2428) supplies 12.288Mhz CLK for the BCLK of the ADAU1761.

    I want to know the proper register setting values for above condition - 16bit/48K/2ch serial input and 12.288M BCLK -, especially 0x4015, 0x4016, 0x4017, and 0x40F8 registers.

  • 0
    •  Analog Employees 
    on Oct 1, 2019 10:37 AM in reply to Yongho Shin

    Hello,

    I've tested with my A2B master board and slave board.

    EVAL-AD2428WD1BZ is my master and EVAL-AD2428WB1BZ is my slave.

    Actually, I asked, what is your master board.

    But it's okay. I will share my code to your e-mail.

    In the EVAL-AD2428WB1BZ slave board, AD2428W chip is clock master and ADAU1761 is the clock slave.

    So, those registers should be matched between AD2428 and ADAU1761.

    In my case,

     0x4015(16405)==0x00,

     0x4016(16406)==0x00,

     0x4017(16407)==0x00 

     and 0x40F8(16632)==0x00

    Thank you.

  • 0
    •  Analog Employees 
    on Oct 17, 2019 2:03 AM

    Hi,

    I moved this to its proper community SigmaDSP Processors and SigmaStudio Development Tool.

    Regards,
    Goz

  • 0 on Nov 28, 2019 6:16 AM in reply to rudolph

    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]