43 lines
904 B
Python
43 lines
904 B
Python
from nmigen import *
|
|
|
|
"""
|
|
Memory Bus (Wishbone Slave)
|
|
"""
|
|
|
|
class MemoryBus(Elaboratable):
|
|
def __init__(self):
|
|
self.adr = Signal(30)
|
|
self.dat_w = Signal(32)
|
|
self.dat_r = Signal(32)
|
|
self.sel = Signal(4)
|
|
self.cyc = Signal(1)
|
|
self.stb = Signal(1)
|
|
self.ack = Signal(1)
|
|
self.we = Signal(1)
|
|
self.cti = Signal(3)
|
|
self.bte = Signal(2)
|
|
self.err = Signal(1)
|
|
def ports(self):
|
|
input_ports = [
|
|
self.adr,
|
|
self.dat_w,
|
|
self.sel,
|
|
self.cyc,
|
|
self.stb,
|
|
self.we,
|
|
self.cti,
|
|
self.bte
|
|
]
|
|
output_ports = [
|
|
self.dat_r,
|
|
self.ack,
|
|
self.err
|
|
]
|
|
return input_ports + output_ports
|
|
def elaborate(self, platform):
|
|
m = Module()
|
|
|
|
# TODO
|
|
|
|
return m
|