Questions tagged [papilio]

2 questions

votes

4 answers

FPGA: count up or count down?

I am learning to use an FPGA (Papilio development board,which has a xilinx spartan3e, using vhdl). I need to divide an incoming pulse by a (hard coded) number. I can see 3 options - roughly, as pseudocode (using 10 counts as an example): Initialize…

asked Dec 28 '17 at 13:10

AMADANON Inc.

vote

1 answer

In a constraints.ucf, how do I tell it to that an unconnected pin is ok?

I'm new FPGAs, and working through the "IntroToSpartanFPGABook" PDF. I'm looking at the "constraints.ucf" file, and (because I'm lazy), it occurred to me that I could create one "constraints.ucf" file for my (Papilio) Megawin, which I can then use…

fpga vhdl xilinx papilio

asked Dec 27 '17 at 00:51

AMADANON Inc.