I am trying to characterize my AS5311 linear magnetic encoders,
and I need to capture the encoder count value when certain pins
change state. I've been studying hal comps, and it looks like a
variation on edge.comp and sample_hold.comp is about what I want.
Unfortunately, I can't seem to get edge, sample_hold, or my new
sample.comp functions to work, at least as viewed with "show configuration"
in Axis or halrun. If I put a watch on all the pins of any of these components,
I can see the inputs change, but outputs do not.
There must be something simple and obvious that I'm missing. Any
suggestions?
component sample "Sample";
pin in s32 in "Value stored when desired edge detected";
pin in bit edge;
param rw bit in_edge=TRUE "TRUE means falling, FALSE means rising";
pin out s32 out;
function _ nofp;
license "GPL";
;;
FUNCTION(_) {
if (in_edge && (edge < last)) {
out = in;
}
if (!in_edge && (last < edge)) {
out = in;
}
last = edge;
}
Thanks,
-- Ralph
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