arm_biquad_cas_df1_32x64_ins_q31 Struct Reference

Instance structure for the high precision Q31 Biquad cascade filter.

Data Fields

uint8_t numStages
 
q63_tpState
 
q31_tpCoeffs
 
uint8_t postShift
 

Description

Field Documentation

uint8_t arm_biquad_cas_df1_32x64_ins_q31::numStages

number of 2nd order stages in the filter. Overall order is 2*numStages.

Referenced by arm_biquad_cas_df1_32x64_init_q31(), and arm_biquad_cas_df1_32x64_q31().

q31_t* arm_biquad_cas_df1_32x64_ins_q31::pCoeffs

points to the array of coefficients. The array is of length 5*numStages.

Referenced by arm_biquad_cas_df1_32x64_init_q31(), and arm_biquad_cas_df1_32x64_q31().

uint8_t arm_biquad_cas_df1_32x64_ins_q31::postShift

additional shift, in bits, applied to each output sample.

Referenced by arm_biquad_cas_df1_32x64_init_q31(), and arm_biquad_cas_df1_32x64_q31().

q63_t* arm_biquad_cas_df1_32x64_ins_q31::pState

points to the array of state coefficients. The array is of length 4*numStages.

Referenced by arm_biquad_cas_df1_32x64_init_q31(), and arm_biquad_cas_df1_32x64_q31().