litex/liteethernet/mac/common.py

15 lines
329 B
Python

from migen.fhdl.std import *
from migen.flow.actor import EndpointDescription
eth_mtu = 1532
eth_preamble = 0xD555555555555555
buffer_depth = 2**log2_int(eth_mtu, need_pow2=False)
def eth_description(dw):
layout = [
("d", dw),
("last_be", dw//8),
("error", dw//8)
]
return EndpointDescription(layout, packetized=True)