I need to latch encoder counts at the edge of the index
pulse. The hm2_7i92 encoder hal component has a
"latch enable", "count-latched", and "latch-polarity" pins,
which sound very promising. There is zero documentation
on these as far as I can find. Looking at the source code,
I am still confused, and wonder if I'm seeing a bug:
do_flag(
&hm2->encoder.control_reg[i],
index_enable,
HM2_ENCODER_LATCH_ON_INDEX
);
do_flag(
&hm2->encoder.control_reg[i],
!index_enable && latch_enable,
HM2_ENCODER_LATCH_ON_PROBE
);
do_flag(
&hm2->encoder.control_reg[i],
index_enable || latch_enable,
HM2_ENCODER_INDEX_JUSTONCE
);
What I think I want is the INDEX_JUSTONCE mode, but
the "index_enable || latch_enable" doesn't make sense
to me. That would suggest that either index_enable or
latch_enable pins would set this mode, Anybody (Jeff maybe?)
care to clarify the functionality of this latching capability?
It would be nice if the hostmot2 man page and web docs
could be updated with these pins, which have been around
for quite a while.
Thanks,
-- Ralph
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