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stepcompress: Implement a step+dir+step filter

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Some stepper motor drivers do not respond well to rapid "step +
direction change + step" events.  In particular, it is believed this
can cause "over current" events on the tmc2208 drivers when they are
in "stealthchop" mode.  Detect these events and remove them from the
generated step times.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor
2020-02-25 12:54:55 -05:00
parent d86bf0b927
commit acd165cbea
4 changed files with 105 additions and 31 deletions
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klippy/chelper/stepcompress.h
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@@ -14,6 +14,7 @@ uint32_t stepcompress_get_oid(struct stepcompress *sc);
int stepcompress_get_step_dir(struct stepcompress *sc);
int stepcompress_append(struct stepcompress *sc, int sdir
, double print_time, double step_time);
int stepcompress_commit(struct stepcompress *sc);
int stepcompress_reset(struct stepcompress *sc, uint64_t last_step_clock);
int stepcompress_queue_msg(struct stepcompress *sc, uint32_t *data, int len);