a simple rotary encoder for my mill. How?

hi,

i have a simple rotary encoder with phase A/B and a integrated switch. the encoder has 32 steps per round.
i connected it to parport0 pin 10,11,12 and GND. in MACH3 under windows all works but with EMC i have no luck with HAL.
also i can't find a documentation about this (or i can't understand this)
my plan:

switch pressing => axsis select (x,y,z,x,y,z...)
turn the encoder => actual axsis is moving

can any one explain/show how this simple setup is done in custom.hal

wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Hooking_Up_A_MPG_Pendant
is similar but looks like it uses a selector switch connected to three parallel port input bits for
axis selection

i known this docu site but i don't understand it complete. i use it like described but no axis is moving:

loadrt encoder num_chan=1
loadrt mux4 count=1

addf encoder.capture-position servo-thread
addf encoder.update-counters base-thread
addf mux4.0 servo-thread

setp axis.0.jog-vel-mode 0
setp axis.1.jog-vel-mode 0
setp axis.2.jog-vel-mode 0
setp axis.0.jog-vel-mode 1
setp axis.1.jog-vel-mode 1
setp axis.2.jog-vel-mode 1

setp encoder.0.x4-mode 0

setp mux4.0.in0 0.1
setp mux4.0.in1 0.01
setp mux4.0.in2 0.001
setp axis.0.jog-enable TRUE
setp axis.1.jog-enable TRUE
setp axis.2.jog-enable TRUE

net pend-scale axis.0.jog-scale <= mux4.0.out
net pend-scale axis.1.jog-scale
net pend-scale axis.2.jog-scale

net mpg-a encoder.0.phase-A <= parport.0.pin-10-in
net mpg-b encoder.0.phase-B <= parport.0.pin-11-in

net pend-counts axis.0.jog-counts <= encoder.0.counts
net pend-counts axis.1.jog-counts
net pend-counts axis.2.jog-counts

also i can't find a hint to simple select the 3 axis with one button (each press step to the next)

It may not work if you dont have the jog scale set correctly (the mux inputs right). For example if the mux select pins were both high, I bet you get 0 for the jog increment

You can back-trace through the operation with HAL meter (I'd look at encoder.0.counts first)

For selecting axis by pushbutton , maybe some HAl guru can suggest an elegant method

Thank You!

Thats was a really helpful post! Now it's working.

Where can i find how to write a HAL-file like this?
'updown' , 'select8', 'net' ore 'setp' are HAL-components?
It looks like a electronic circuit.


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