mu578 commented on code in PR #9487:
URL: https://github.com/apache/nuttx/pull/9487#discussion_r1225018065
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include/dsp.h:
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@@ -447,6 +447,14 @@ struct pmsm_model_f32_s
float iq_int; /* Iq integral part */
};
+/* Average filter */
+
+struct avg_filter_data_s
Review Comment:
what we like to control in any filtering process that's the rolling window
size, especially in lowpass filtering ; i.e that's a noise reducer.
from the top of my mind:
```
void sma(const int_type n, const float_type * x, const int_type p,
float_type * r)
{
int_type i = 0, j = 0, k = 0, l = p - 1;
float_type s = float_type_zero, t;
if (!(l > (n - 1))) {
k = l - (p - 1); i = k;
if (p > 1) { while (i < l) { s += x[i++]; } }
do {
s += x[i++]; t = s; s -= x[k++]; r[j++] = t / p;
} while (i <= (n - 1));
}
}
```
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