ok heres a quick comp
which i think should do it , although it may need debugging as to order
component 2inx4out "2-input to 4 out decoder";
pin in bit in0;
pin in bit in1;
pin out bit outa;
pin out bit outb;
pin out bit outc;
pin out bit outd;
function _;
license "GPL";
;;
FUNCTION(_){
if ( in1 && in0 ) {
outa = 0;
outb = 0;
outc = 0;
outd = 0;
} else if (in1 && !in0) {
outa = 1;
outb = 1;
outc = 0;
outd = 0;
} else if (!in1 && in0) {
outa = 0;
outb = 0;
outc = 1;
outd = 1;
} else if (!in1 && !in0) {
outa = 1;
outb = 1;
outc = 1;
outd = 1;
}
}
On 22 September 2014 13:36, andy pugh <bodge...@gmail.com> wrote:
> On 22 September 2014 13:01, Axel Zöllich <fa...@zoellich.de> wrote:
>
> > 1 out of 4 demux this is:
> > two 7i76 in pins demuxed to 4 hal signals (choosen joint X or Y or Z or
> A)
>
> There perhaps ought to be a dedicated component for this, and I think
> that there is more than one way to do this and someone else might come
> up with a better solution.
>
> But, you could use the HAL pins to control an integer mux, then pick
> out the individual bits.
>
> loadrt mux_generic config=uu4
> loadrt bitslice count=1 personality=4
> addf mux_gen.0 servo-thread
> addf bitslice.0 servo thread
> net sel0 mux_gen.0.sel0 <= hm2_5i25.0.7i77.0.1.input00
> net sel1 mux_gen.0.sel1 <= hm2_5i25.0.7i77.0.1.input01
> setp mux_gen.0.in-u32-00 0x01
> setp mux_gen.0.in-u32-01 0x02
> setp mux_gen.0.in-u32-02 0x04
> setp mux_gen.0.in-u32-03 0x08
> net demux mux_gen.0.out-u32 => bitslice.0.in
> net joint-0-sel bitslice.0.out-00
> net joint-1-sel bitslice.0.out-01
> net joint-2-sel bitslice.0.out-02
> net joint-3-sel bitslice.0.out-03
>
> But ther are other compoents that are close, for example
> http://www.linuxcnc.org/docs/html/man/man9/select8.9.html
> and maybe even
> http://www.linuxcnc.org/docs/html/man/man9/matrix_kb.9.html
>
> Alternatively, if you have run out of IO for the 7i77 for the control
> panel, take a look at the 7i73 which is inexpensive and can very much
> simplify the wiring between the control panel and the 7i77.
>
> --
> atp
> If you can't fix it, you don't own it.
> http://www.ifixit.com/Manifesto
>
>
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