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Everything posted by bzuiss

  1. bzuiss

    Reading a Digital Input

    Hi, I have been developing for the Papilio for several months now but I am a little confused about reading digital inputs from the headers. In my ucf file I have an input "mux" that needs to read 3.3V logic. NET mux LOC="P85" | IOSTANDARD=LVCMOS33; I was using the megawing ucf as comparison but the syntax seems slightly different. NET SWITCH(5) LOC="P2" | IOSTANDARD=LVTTL; NET SWITCH(6) LOC="P3" | IOSTANDARD=LVTTL; NET SWITCH(7) LOC="P4" | IOSTANDARD=LVTTL; As of now, putting 3.3 volts from a DC power supply into my mux input is not registering at all, does anyone know why this might be happening?