Error with arm_fir_f32()
Hi,
i'm using the arm_fir_f32() funktion to filter a real time input signal.
My problem is, that the funktion return '-nan' for each input.
#include "foc.h"
#include "tim.h"
#include "adc.h"
#include "debug.h"
#include "arm_math.h"
/* FIR-FILTER */
#define BLOCK_SIZE 8
#define NUM_TAPS 10
uint16_t blocksize = BLOCK_SIZE;
arm_fir_instance_f32 S;
static float32_t firStateF32[BLOCK_SIZE + NUM_TAPS -1];
const float32_t firCoeffs32[NUM_TAPS] = {
0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f,
};
float32_t in[8]={0, 0, 0, 0, 0, 0, 0, 0};
float32_t out[8]={0, 0, 0, 0, 0, 0, 0, 0};
/* Init FIR-Filter */
arm_fir_init_f32(&S, NUM_TAPS, (float32_t *)&firCoeffs32[0], &firStateF32[0], blocksize);
/* This funktion is called after the adc-conversion is finished (20000Hz) */
void FOCLOOP(void)
{
Get_Angle_rad(ADC_Value[3], &theta_rad_mech[0]);
Convert_Angle_rad(&theta_rad_mech[0], &theta_rad_el[0], motor_1.PPZ);
theta_grad_el = radtograd(theta_rad_el[0]);
CalcOmega(&theta_rad_mech[0], &omega_el[0], freq);
for(int i = BLOCK_SIZE; i>=1; i--) {
in[i] = in[i-1];
}
in[0] = omega_el[0];
arm_fir_f32(&S, &in[0], &out[0], blocksize);
}