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Searched refs:LP_ALFA (Results 1 – 2 of 2) sorted by relevance

/hal_st-3.7.0/audio/microphone/
DOpenPDMFilter.c180 …Param->LP_ALFA = (Param->LP_HZ != 0 ? (uint16_t) (Param->LP_HZ * 256 / (Param->LP_HZ + Param->Fs /… in Open_PDM_Filter_Init()
252 OldZ = ((256 - Param->LP_ALFA) * OldZ + Param->LP_ALFA * OldOut) >> 8; in Open_PDM_Filter_64()
300 OldZ = ((256 - Param->LP_ALFA) * OldZ + Param->LP_ALFA * OldOut) >> 8; in Open_PDM_Filter_128()
DOpenPDMFilter.h79 uint16_t LP_ALFA; member