amaranth/examples/arst.py

22 lines
565 B
Python

from nmigen import *
from nmigen.back import rtlil, verilog
class ClockDivisor:
def __init__(self, factor):
self.v = Signal(factor)
self.o = Signal()
def get_fragment(self, platform):
m = Module()
m.d.sync += self.v.eq(self.v + 1)
m.d.comb += self.o.eq(self.v[-1])
return m.lower(platform)
ctr = ClockDivisor(factor=16)
frag = ctr.get_fragment(platform=None)
frag.add_domains(ClockDomain("sync", async_reset=True))
# print(rtlil.convert(frag, ports=[ctr.o]))
print(verilog.convert(frag, ports=[ctr.o]))