22 lines
693 B
Python
22 lines
693 B
Python
from migen.fhdl import structure as f
|
|
from migen.corelogic import timeline
|
|
from . import wishbone
|
|
from . import csr
|
|
|
|
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,
|
|
[(2, [f.Assign(self.wishbone.ack_o, 1)])])
|
|
|
|
def GetFragment(self):
|
|
sync = [
|
|
f.Assign(self.csr.we_o, self.wishbone.we_i),
|
|
f.Assign(self.csr.d_o, self.wishbone.dat_i),
|
|
f.Assign(self.csr.a_o, self.wishbone.adr_i[2:16]),
|
|
f.Assign(self.wishbone.ack_o, 0),
|
|
f.Assign(self.wishbone.dat_o, self.csr.d_i)
|
|
]
|
|
return f.Fragment(sync=sync) + self.timeline.GetFragment()
|