Hi3516CV610 内置声卡使用问题

按官方例程将对应的初始化代码移植到自己的应用中，编译没有问题，运行时“himpi_ao_enable_chn（）”提示音频输出通道无效。是哪里有配置不对吗？
代码：
void init()
{
hi_s32 ret;
hi_audio_dev ao_dev_id;
hi_ao_chn ao_chn_cnt = 0;
/**/
ao_dev_id = config.AoDevId;//音频输出设备IP
/**/
aioattr.sample_rate = static_cast(config.samplerate);//采样率 HI_AUDIO_SAMPLE_RATE_44100; //采样率
aio_attr.bit_width = HI_AUDIO_BIT_WIDTH_16; //16位
aio_attr.work_mode = HI_AIO_MODE_I2S_MASTER; //配置为主模式
aio_attr.snd_mode = (config.channels==2)? HI_AUDIO_SOUND_MODE_STEREO : HI_AUDIO_SOUND_MODE_MONO;//声道 ;
aio_attr.expand_flag = 0;
aio_attr.frame_num = 5;//缓存帧数量 5帧
aio_attr.chn_cnt = 2; / 2:chn num /
aio_attr.clk_share = 1;
aio_attr.i2s_type = HI_AIO_I2STYPE_INNERCODEC;//选用内部声卡
aio_attr.point_num_per_frame = 1152;//帧大小

LIB_DEBUG("aio_attr.snd_mode(%d)  config_.channels(%d)\n", aio_attr.snd_mode,config_.channels); 
ret = hi_mpi_ao_set_pub_attr(ao_dev_id, &aio_attr);
if (ret != HI_SUCCESS) {
    LIB_DEBUG("%s: hi_mpi_ao_set_pub_attr(%d) failed with %#x!\n", __FUNCTION__, ao_dev_id, ret);
    return HI_FAILURE;
}

ret = hi_mpi_ao_enable(ao_dev_id);
if (ret != HI_SUCCESS) {
    LIB_DEBUG("%s: hi_mpi_ao_enable(%d) failed with %#x!\n", __FUNCTION__, ao_dev_id, ret);
    return HI_FAILURE;
}
ao_chn_cnt = aio_attr.chn_cnt >> ((hi_u32)aio_attr.snd_mode);
uint8_t i=0;
for (i = 0; i < (hi_s32)ao_chn_cnt; i++) {
    ret = hi_mpi_ao_enable_chn(ao_dev_id, ao_chn_cnt);
    if (ret != HI_SUCCESS) {
        LIB_DEBUG("%s: hi_mpi_ao_enable_chn(%d) failed with %#x!\n", __FUNCTION__, i, ret);
        return HI_FAILURE;
    }
}

ret = hi_mpi_ao_enable_chn(ao_dev_id, HI_AO_SYS_CHN_ID);
if (ret != HI_SUCCESS) {
    printf("%s: hi_mpi_ao_enable_chn(%d) failed with %#x!\n", __FUNCTION__, i, ret);
    return HI_FAILURE;
}

ret = sample_inner_codec_cfg_audio(aio_attr.sample_rate);
if (ret != HI_SUCCESS) {
    printf("%s:sample_inner_codec_cfg_audio failed\n", __FUNCTION__);
    return ret;
}
return  HI_SUCCESS ;

}
运行错误提示： hi_mpi_ao_enable_chn(0) failed with 0xa0168003!