examples/ctr.py

   1 from nmigen import *
   2 from nmigen.cli import main, pysim
   3
   4
   5 class Counter:
   6     def __init__(self, width):
   7         self.v = Signal(width, reset=2**width-1)
   8         self.o = Signal()
   9
  10     def get_fragment(self, platform):
  11         m = Module()
  12         m.d.sync += self.v.eq(self.v + 1)
  13         m.d.comb += self.o.eq(self.v[-1])
  14         return m.lower(platform)
  15
  16
  17 ctr = Counter(width=16)
  18 if __name__ == "__main__":
  19     main(ctr, ports=[ctr.o])