cat /proc/umap/ai内容为空

大家好，

新人，问个小白的问题。问题如上，我在调用./sample_audio 后再敲#cat /proc/umap/ai或其他命令显示都为空。
这个命令是这样操作的么？
由于我目前只调用了audio相关，所以在insmod的时候，就是insmod到audio为止。
insmod hi_media.ko
insmod hi3516a_base.ko
insmod hi3516a_sys.ko vi_vpss_online=0 sensor=mn34220

insmod hi3516a_aio.ko
insmod hi3516a_ai.ko
insmod hi3516a_ao.ko

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log如下
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ai(0,0) bind to ao(0,0) ok

please press twice ENTER to exit this sample




/************************************/
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(AEC/ANR/ALC process), then send to AO
        q:  quit whole audio sample

sample command:q
/tmp # cat /proc/umap/ai

[AI] Version: [Hi3516A_MPP_V1.0.6.0 B050 Release], Build Time: [Mar 28 2016, 19:35:48]

-----AI DEV ATTR---------------------------------------------------------------------------------------------------------
AiDev WorkMod   SampR  BitWid  ChnCnt  ClkSel SoundMod  PoiNum  ExFlag  FrmNum

-----AI DEV STATUS-------------------------------------------------------------------------------------------------------
AiDev      IntCnt     fifoCnt     buffInt FrmTime  MaxFrmTime TranLen IsrTime  MaxIsrTime     CBPhy  CBSize   ROffSet   WOffSet

-----AI DEV EXTEND STATUS------------------------------------------------------------------------------------------------
AiDev enTrack   bMute  Volume

-----AI CHN STATUS----------------------------------------------------------------------------------------------------------------
AiDev   AiChn   State    Read   Write      BufFul  UsrQueLost u32Data0 u32Data1

-----AI CHN RESAMPLE STATUS-------------------------------------------------------------------------------------------------------
AiDev AiChn   State  bResmp  PoiNum   InSampR  OutSampR

-----AI CHN VQE STATUS0------------------------------------------------------------------------------------------------------------
AiDev AiChn   State    bVqe workmod    RATE  PoiNum    bAnr    bAgc     bEq    bHpf    bAec    bRnr    bHdr    bAvc    bPeq  WrFile
/tmp #

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