# arm_fir_instance_q15 Struct Reference

CMSIS-DSP: arm_fir_instance_q15 Struct Reference

| CMSIS-DSP Version 1.5.2 CMSIS DSP Software Library

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arm_fir_instance_q15 Struct Reference

Instance structure for the Q15 FIR filter.

## Data Fields

uint16_t | numTaps
q15_t * | pState
q15_t * | pCoeffs

## Field Documentation

uint16_t arm_fir_instance_q15::numTaps

number of filter coefficients in the filter.

Referenced by arm_fir_fast_q15(), arm_fir_init_q15(), and arm_fir_q15().

q15_t* arm_fir_instance_q15::pCoeffs

points to the coefficient array. The array is of length numTaps.

Referenced by arm_fir_fast_q15(), arm_fir_init_q15(), and arm_fir_q15().

q15_t* arm_fir_instance_q15::pState

points to the state variable array. The array is of length numTaps+blockSize-1.

Referenced by arm_fir_fast_q15(), arm_fir_init_q15(), and arm_fir_q15().