>
> sudo halcompile --install mux2s32.comp
> worked a treat.  Is there a man page?


Excellent, I'm glad it worked. Here is the man page for the HAL comp
generator:
http://linuxcnc.org/docs/html/hal/comp.html

I just modified the code for the mux2, simply changed any instance of float
to s32. It is not very picky about types, I have found you can make a HAL
comp to convert float to s32 as simply as this:

pin in float in;
pin out s32 out;
function _;
;;
FUNCTION(_) {
out = in
}

I though there was no way it would work, but it did. I hear C is much less
picky about types than Python though.

*seen on a t-shirt at Walmart: "I'll go to work when my coffee does." :)


I'll have to remember that one!
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