I was looking playing with PNCconf and the 7i48 firmware.
The encoder numbering system from the PIN file says on 5i20's P2:
P2-1 0 PWMGen 0 Enable (out)
P2-3 1 MuxedQCount 0 Muxed Phase A (in)
P2-5 2 MuxedQCount 0 Muxed Phase B (in)
P2-7 3 MuxedQCount 0 Muxed Index (in)
P2-9 4 MuxedQCount 1 Muxed Phase A (in)
P2-11 5 MuxedQCount 1 Muxed Phase B (in)
P2-13 6 MuxedQCount 1 Muxed Index (in)
P2-15 7 MuxedQCount 2 Muxed Phase A (in)
P2-17 8 MuxedQCount 2 Muxed Phase B (in)
P2-19 9 MuxedQCount 2 Muxed Index (in)
P2-21 10 MuxedQCountSel 0 Muxed Encoder Select 0 (out)
<snip>
On P3:
PIN IO# Module Chan Func
P3-1 24 PWMGen 6 Enable (out)
P3-3 25 MuxedQCount 3 Muxed Phase A (in)
P3-5 26 MuxedQCount 3 Muxed Phase B (in)
P3-7 27 MuxedQCount 3 Muxed Index (in)
P3-9 28 MuxedQCount 4 Muxed Phase A (in)
P3-11 29 MuxedQCount 4 Muxed Phase B (in)
P3-13 30 MuxedQCount 4 Muxed Index (in)
P3-15 31 MuxedQCount 5 Muxed Phase A (in)
P3-17 32 MuxedQCount 5 Muxed Phase B (in)
P3-19 33 MuxedQCount 5 Muxed Index (in)
P3-21 34 MuxedQCountSel 6 Muxed Encoder Select 0 (out)
<snip>
This would suggest that mux 6 was on top of 0 , 7 on 1 etc.
Except for two things:
-seems strange to have the mux encoder enable for 6 on the P3
connector if 6 is actually on P2
- since hostmot2 deselects components from highest number down
to get P3 to be GPIO one would have to deselect 9 encoder (all of P3
and half of P2) cause all the highest numbered encoders are the
second selected ones.
At the moment this is how PNCconf handles it - which I am sure is not right.
So how does the numbering system really go?
Is 6 on top of 0 or (more sanely) 6 really supposed to be where 3 is?
Hope that makes some sense.
Chris M
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