Hardware
/
litedram
mirror of https://github.com/enjoy-digital/litedram.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

frontend/avalon: Minor cosmetic fixes.

This commit is contained in:
Florent Kermarrec 2023-05-23 14:57:36 +02:00
parent f1293eae1e
commit b452f09df6
1 changed files with 10 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
litedram/frontend/avalon.py
View File

@ -4,18 +4,19 @@
# Copyright (c) 2023 Hans Baier <hansfbaier@gmail.com> # Copyright (c) 2023 Hans Baier <hansfbaier@gmail.com>
# SPDX-License-Identifier: BSD-2-Clause # SPDX-License-Identifier: BSD-2-Clause
"""Wishbone frontend for LiteDRAM""" """AvalonMM frontend for LiteDRAM"""
from math import log2 from math import log2
from migen import * from migen import *
from litex.soc.interconnect import stream from litex.soc.interconnect import stream
from litedram.common import LiteDRAMNativePort from litedram.common import LiteDRAMNativePort
from litedram.frontend.adapter import LiteDRAMNativePortConverter from litedram.frontend.adapter import LiteDRAMNativePortConverter
# LiteDRAMWishbone2Native -------------------------------------------------------------------------- # LiteDRAMAvalongMM2Native --------------------------------------------------------------------------
class LiteDRAMAvalonMM2Native(Module): class LiteDRAMAvalonMM2Native(Module):
def __init__(self, avalon, port, base_address=0x00000000, burst_increment=1): def __init__(self, avalon, port, base_address=0x00000000, burst_increment=1):
@ -152,7 +153,9 @@ class LiteDRAMAvalonMM2Native(Module):
port.cmd.we.eq(0), port.cmd.we.eq(0),
port.cmd.valid.eq(1), port.cmd.valid.eq(1),
If(port.cmd.ready, NextValue(cmd_ready_seen, 1)), If(port.cmd.ready,
NextValue(cmd_ready_seen, 1)
),
If(cmd_ready_seen, If(cmd_ready_seen,
port.cmd.valid.eq(0), port.cmd.valid.eq(0),
port.cmd.we.eq(0) port.cmd.we.eq(0)
@ -172,7 +175,8 @@ class LiteDRAMAvalonMM2Native(Module):
NextValue(burstcounter, 0), NextValue(burstcounter, 0),
NextState("START") NextState("START")
).Else(NextValue(address, address + burst_increment), ).Else(
NextValue(burstcounter, burstcounter - 1), NextValue(address, address + burst_increment),
NextState("READ_CMD"))) NextValue(burstcounter, burstcounter - 1),
NextState("READ_CMD")))
) )