I am making a custom configuration to replace a Fagor 8050
cnc control with Linuxcnc and a Mesa 7i80hd or other triple
2x25 header interface. I have four servo channels, and three
mpg wheels for jogging. There only seems to be four regular
encoder channels, and beyond that muxed counters are required.
I don't see just how the muxed counters work, however. Can
the two types be mixed? I see in various PIN source files a
mux selection pin. How is this used? Here are the relevant
lines from the vhd file:
IOPortTag & x"00" & MuxedQCountTag & MuxedQCountQAPin,
-- I/O 24
IOPortTag & x"00" & MuxedQCountTag & MuxedQCountQBPin,
-- I/O 25
IOPortTag & x"01" & MuxedQCountTag & MuxedQCountQAPin,
-- I/O 26
IOPortTag & x"01" & MuxedQCountTag & MuxedQCountQBPin,
-- I/O 27
IOPortTag & x"02" & MuxedQCountTag & MuxedQCountQAPin,
-- I/O 28
IOPortTag & x"02" & MuxedQCountTag & MuxedQCountQBPin,
-- I/O 29
IOPortTag & x"00" & MuxedQCountSelTag & MuxedQCountSel0Pin,
-- I/O 30
Thanks again,
-- Ralph
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