mic-in/line-out没有声音_问答

环境hi3536+Hi3536_SDK_V2.0.6.0

编译完毕mpp_single/sample/audio
/mnt/work/Hisilicon/mpp_single/sample/audio #
/mnt/work/Hisilicon/mpp_single/sample/audio # ./sample_audio

/************************************/
please choose the case which you want to run:
      0:  start AI to AO loop
      1:  send audio frame to AENC channel from AI, save them
      2:  read audio stream from file, decode and send AO
      3:  start AI(AIC31) to AO(Hdmi) loop
      q:  quit whole audio sample

sample command:0
line-in/line-out测试ok，
但是现在测试mic-in/line-out就没有声音
测试mic-in的时候，配置了寄存器himm 0x121200ac 把acodec_linein_r_sel配置为0x1：MICR单端输入/把acodec_linein_l_sel配置为0x1：MICL单端输入
为什么还是没有声音呢？谢谢！

下面是电路图

或者直接拿官网的例子
把line-in改成mic-in  把 switch (1)---> switch (0)，但还是没有声音，用示波器测量有变化的模拟信号进入AC0_LINEIN_L或者AC0_LINEIN_R
switch (0)//g_InnerCodecInput
{
      case 0:
      {
        #if 1
         mixer_mic_ctrl = ACODEC_MIXER_MICIN;
         if (ioctl(fdAcodec, ACODEC_SET_MIXER_MIC, &mixer_mic_ctrl))
         {
            printf("%s: set acodec micin failed\n", __FUNCTION__);
            return HI_FAILURE;
         }
#endif

         /* set volume plus (0~0x1f,default 0) */
         gain_mic = 0x10;
         if (ioctl(fdAcodec, ACODEC_SET_GAIN_MICL, &gain_mic))
         {
            printf("%s: set acodec micin volume failed\n", __FUNCTION__);
            return HI_FAILURE;
         }
         if (ioctl(fdAcodec, ACODEC_SET_GAIN_MICR, &gain_mic))
         {
            printf("%s: set acodec micin volume failed\n", __FUNCTION__);
            return HI_FAILURE;
         }

      }
      break;
      case 1:
      {
         mixer_mic_ctrl = ACODEC_MIXER_LINEIN;
         if (ioctl(fdAcodec, ACODEC_SET_MIXER_MIC, &mixer_mic_ctrl))
         {
            printf("%s: set acodec micin failed\n", __FUNCTION__);
            return HI_FAILURE;
         }
         mute = 0;
         if (ioctl(fdAcodec, ACODEC_SET_MICL_MUTE, &mute))
         {
            printf("%s: set acodec micin failed\n", __FUNCTION__);
            return HI_FAILURE;
         }
         if (ioctl(fdAcodec, ACODEC_SET_MICR_MUTE, &mute))
         {
            printf("%s: set acodec micin failed\n", __FUNCTION__);
            return HI_FAILURE;
         }

      }
      break;

mic-in/line-out没有声音

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