23 lines
701 B
Python
23 lines
701 B
Python
from migen.bus import wishbone
|
|
from migen.bus import csr
|
|
from migen.fhdl.structure import *
|
|
from migen.corelogic import timeline
|
|
|
|
class Inst():
|
|
def __init__(self):
|
|
self.wishbone = wishbone.Slave("to_csr")
|
|
self.csr = csr.Master("from_wishbone")
|
|
self.timeline = timeline.Inst(self.wishbone.cyc_i & self.wishbone.stb_i,
|
|
[(1, [self.csr.we_o.eq(self.wishbone.we_i)]),
|
|
(2, [self.wishbone.ack_o.eq(1)]),
|
|
(3, [self.wishbone.ack_o.eq(0)])])
|
|
|
|
def get_fragment(self):
|
|
sync = [
|
|
self.csr.we_o.eq(0),
|
|
self.csr.d_o.eq(self.wishbone.dat_i),
|
|
self.csr.a_o.eq(self.wishbone.adr_i[:14]),
|
|
self.wishbone.dat_o.eq(self.csr.d_i)
|
|
]
|
|
return Fragment(sync=sync) + self.timeline.get_fragment()
|