#define EOS_I2S_FMT_PCM16       0
#define EOS_I2S_FMT_ALAW        1

#define EOS_I2S_MODE_STEREO     0
#define EOS_I2S_MODE_MONO     	1

#define EOS_I2S_ETYPE_MIC       1
#define EOS_I2S_ETYPE_SPK       2