CMSIS-DSP  Verison 3.0
CMSIS DSP Software Library
arm_biquad_casd_df1_inst_q15 Struct Reference

Instance structure for the Q15 Biquad cascade filter.

Data Fields

int8_t numStages
q15_t * pState
q15_t * pCoeffs
int8_t postShift

Field Documentation

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

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

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

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