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Software for White Rabbit PTP Core
Commit 098116fc authored by Alessandro Rubini's avatar Alessandro Rubini Committed by Adam Wujek
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softpll: remove unused filters 

Signed-off-by: Alessandro Rubini's avatarAlessandro Rubini <rubini@gnudd.com>
parent f46d263b
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Showing with 0 additions and 72 deletions
softpll/spll_common.c
View file @ 098116fc
......@@ -93,24 +93,6 @@ void ld_init(spll_lock_det_t *ld)
ld->lock_changed = 0;
}
void lowpass_init(spll_lowpass_t *lp, int alpha)
{
lp->y_d = 0x80000000;
lp->alpha = alpha;
}
int lowpass_update(spll_lowpass_t *lp, int x)
{
if (lp->y_d == 0x80000000) {
lp->y_d = x;
return x;
} else {
int scaled = (lp->alpha * (x - lp->y_d)) >> 15;
lp->y_d = lp->y_d + (scaled >> 1) + (scaled & 1);
return lp->y_d;
}
}
/* Enables/disables DDMTD tag generation on a given (channel).
Channels (0 ... splL_n_chan_ref - 1) are the reference channels
......@@ -142,33 +124,6 @@ void spll_enable_tagger(int channel, int enable)
pll_verbose("%s: ch %d, OCER 0x%x, RCER 0x%x\n", __FUNCTION__, channel, SPLL->OCER, SPLL->RCER);
}
void biquad_init(spll_biquad_t *bq, const int *coefs, int shift)
{
memset(bq, 0, sizeof(spll_biquad_t));
memcpy(bq->coefs, coefs, 5 * sizeof(int));
bq->shift = shift;
}
int biquad_update(spll_biquad_t *bq, int x)
{
register int y = 0;
y += bq->coefs[0] * x;
y += bq->coefs[1] * bq->xd[0];
y += bq->coefs[2] * bq->xd[1];
y -= bq->coefs[3] * bq->yd[0];
y -= bq->coefs[4] * bq->yd[1];
y >>= bq->shift;
bq->xd[1] = bq->xd[0];
bq->xd[0] = x;
bq->yd[1] = bq->yd[0];
bq->yd[0] = y;
return y;
}
const char *stringlist_lookup(const struct stringlist_entry *slist, int id)
{
int i;
......
softpll/spll_common.h
View file @ 098116fc
......@@ -50,28 +50,6 @@ typedef struct {
int lock_changed;
} spll_lock_det_t;
/* simple, 1st-order lowpass filter */
typedef struct {
int alpha;
int y_d;
} spll_lowpass_t;
typedef struct {
int coefs[5]; /* Biquad coefficients: b0 b1 b2 a1 a2 */
int shift; /* bit shift for the coeffs / output */
int yd[2], xd[2]; /* I/O delay lines */
} spll_biquad_t;
/* long-term-average filter */
typedef struct {
int acc;
int n;
int window;
int pos;
int size;
int log[16];
} spll_lta_t;
struct stringlist_entry {
int id;
const char *str;
......@@ -86,14 +64,9 @@ int pi_update(spll_pi_t *pi, int x);
void ld_init(spll_lock_det_t *ld);
int ld_update(spll_lock_det_t *ld, int y);
void lowpass_init(spll_lowpass_t *lp, int alpha);
int lowpass_update(spll_lowpass_t *lp, int x);
void spll_enable_tagger(int channel, int enable);
void biquad_init(spll_biquad_t *bq, const int *coefs, int shift);
int biquad_update(spll_biquad_t *bq, int x);
const char *stringlist_lookup(const struct stringlist_entry *slist, int id);
#endif // __SPLL_COMMON_H
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