arm_biquad_casd_df1_inst_q31 Struct Reference

Instance structure for the Q31 Biquad cascade filter. More...

Data Fields
uint32_t	numStages
q31_t *	pState
const q31_t *	pCoeffs
uint8_t	postShift

Description

Instance structure for the Q31 Biquad cascade filter.

Examples

arm_graphic_equalizer_example_q31.c.

Field Documentation

numStages

uint32_t numStages

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

pCoeffs

const q31_t* pCoeffs

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

postShift

uint8_t postShift

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

pState

q31_t* pState

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