CCS/TLV320AIC3106: Register settings for microphone bypassing to speaker

Hi, Vishnu,

Basically, if you are willing just to playback the mic input through the speaker output, you can configure the LINE2L Bypass [Reg 40] and then select LINE2L as the source for the MONO_LOP output [Reg  73].

I have asked my colleague to take a look to this in case you have additional questions. 

Best Regards,

  -Diego Meléndez López
   Audio Applications Engineer

Hi Diego,

Thanks for the reply. Actually my application needs to playback the data received serially from external source. But now I need to check whether the mic and speaker is properly working.

I will check with the registers you've mentioned.
Can you please help me out with my main requirement, that is , data received through I2S have to play through speaker connected as in schematic.

Thanks & regards,
Vishnu Pradeep

Hi, Vishnu,

Thanks for the feedback. In order to configure the DAC  as the source of the MONO_LOP output, you need to configure either Registers 75 or 78, according to the DAC channel. 

I would recommend you to take a look to this app note, it features general guidelines about how to configure the codecs of the TLV320AIC310x family.

Best Regards,

  -Diego Meléndez López
   Audio Applications Engineer

Hi Diego,

This is my configuration,

AudioCodecRegWrite((unsigned char) CODEC_CLOCK_GENERATION_CONTROL, (unsigned char) 0x02); // CODEC_CLKIN uses MCLK(CLKDIV_OUT)

   AudioCodecRegWrite((unsigned char) CODEC_ADDITIONAL_GPIO_CONTROL_B, (unsigned char)0x01);

   //   AudioCodecRegWrite((unsigned char) CODEC_PLL_A, 0x91);// CODEC_PLL_A_RESETVAL);

//   AudioCodecRegWrite((unsigned char) CODEC_PLL_B, 0x60); // J value 24

//   AudioCodecRegWrite((unsigned char) CODEC_PLL_C, 0x09);

//   AudioCodecRegWrite((unsigned char) CODEC_PLL_D, 0x00);

   AudioCodecRegWrite((unsigned char) CODEC_GPIO1_CONTROL,  0x28);   // clock out on gpio1 pin

   AudioCodecRegWrite((unsigned char) CODEC_SAMPLE_RATE,0x00);//0xAA);  // fs = fsref/n

   AudioCodecRegWrite((unsigned char) CODEC_MIC_BIAS_CONTROL,  0x80);// (unsigned char)0xC0);  // MIC bias

   //When selecting an input, unmute the PGAs after routing the input and powering up the ADC.

   AudioCodecRegWrite((unsigned char) CODEC_LINE2L_LEFT_ADC_CONTROL, 0x80);

   AudioCodecRegWrite((unsigned char) CODEC_LINE1L_LEFT_ADC_CONTROL, 0x7C);  // power up left ADC

   AudioCodecRegWrite((unsigned char) CODEC_LEFT_ADC_PGA_GAIN_CONTROL, 0x00); // unmute PGA

   //================================================================= Speaker configurations

   // ==== bypass

   AudioCodecRegWrite((unsigned char)CODEC_HIGH_POWER_OUTPUT_STAGE_CONTROL,0x30);

   AudioCodecRegWrite((unsigned char)CODEC_LINE2L_MONO_LOPM_VOLUME_CONTROL,0x80);
   
  AudioCodecRegWrite((unsigned char)CODEC_MONO_LOPM_OUTPUT_LEVEL_CONTROL,0x0B);

I am not getting anything in speaker.

Thanks & regards,

Vishnu Pradeep

Hi Diego,


Thanks for the response. I've configured register 79 also with 0x0B value and still no result! I'll take a look into the circuit and check again.

Regards,
Vishnu Pradeep

Hi Diego,

Now I got the signal bypassed. But I couldn't make it work with external data sending through I2S. I am tring to playback the sound with the same data I am getting from the hardware codec in I2S. I tried to send back the 16 bit data back to audio codec through I2S with the below settings.

  AudioCodecPageSelect((unsigned char )0x00);
    AudioCodecRegWrite((unsigned char) CODEC_SW_RESET, codecPage0Regs.SW_RESET);
    // clock generation and control
    AudioCodecRegWrite((unsigned char) CODEC_CLOCK_GENERATION_CONTROL, (unsigned char) 0x02); // CODEC_CLKIN uses MCLK(CLKDIV_OUT)
    AudioCodecRegWrite((unsigned char) CODEC_ADDITIONAL_GPIO_CONTROL_B, (unsigned char)0x01);
    //   AudioCodecRegWrite((unsigned char) CODEC_PLL_A, 0x91);// CODEC_PLL_A_RESETVAL);
 //   AudioCodecRegWrite((unsigned char) CODEC_PLL_B, 0x60); // J value 24
 //   AudioCodecRegWrite((unsigned char) CODEC_PLL_C, 0x09);
 //   AudioCodecRegWrite((unsigned char) CODEC_PLL_D, 0x00);

    AudioCodecRegWrite((unsigned char) CODEC_GPIO1_CONTROL, 0x28);// 0x28);   // clock out on gpio1 pin

    AudioCodecRegWrite((unsigned char) CODEC_SAMPLE_RATE,0x00);//0xAA);  // fs = fsref/n

    AudioCodecRegWrite((unsigned char) CODEC_MIC_BIAS_CONTROL, 0xC0);// (unsigned char)0xC0);  // MIC bias

    //When selecting an input, unmute the PGAs after routing the input and powering up the ADC.
    AudioCodecRegWrite((unsigned char) CODEC_LINE2L_LEFT_ADC_CONTROL, 0x80);
    AudioCodecRegWrite((unsigned char) CODEC_LINE1L_LEFT_ADC_CONTROL, 0x7C);  // power up left ADC
    AudioCodecRegWrite((unsigned char) CODEC_LEFT_ADC_PGA_GAIN_CONTROL, 0x00); // unmute PGA

AudioCodecRegWrite((unsigned char)CODEC_DAC_POWER_OUTPUT_DRIVER_CONTROL,0x80);
    AudioCodecRegWrite((unsigned char)CODEC_LEFT_DAC_DIGITAL_VOLUME_CONTROL,0x00);
    AudioCodecRegWrite((unsigned char)CODEC_DACL1_MONO_LOPM_VOLUME_CONTROL,0x80);

Is there anything that I am missing in configuration??

thanks & regards,

Vishnu Pradeep