ALM and PEND Signals from External Drivers
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Making an expansion board for the Duet 2 Wifi specifically for external drivers. These steppers have integrated optical encoders and the drivers have PEND and ALM signals. They operate with the same signal as an endstop, open or closed pulled up to whatever voltage I like.
With the PEND and ALM signal for 6 drives that quickly adds up to 12 signals.
Since this board will have a SX1509BIULTRT extender chip which give me endstop signals, can I use the CS5-8 from the expansion slot and GPIO1-4 for the signals? Granted this still only gives me 8 signals, but since I personally only intend on using 4 motors in situations where they could lose steps this would be totally passable.
Worst case I can omit the signals, however this is not the preferred solution.
Best case someone knows how I can get 12 signal pins to connect them all to.
