65 lines
2.1 KiB
Python
65 lines
2.1 KiB
Python
#
|
|
# This file is part of LiteX-Boards.
|
|
#
|
|
# Copyright (c) 2021 Alain Lou <alainzlou@gmail.com>
|
|
# SPDX-License-Identifier: BSD-2-Clause
|
|
|
|
from litex.build.generic_platform import *
|
|
from litex.build.altera import AlteraPlatform
|
|
from litex.build.altera.programmer import USBBlaster
|
|
|
|
# IOs ----------------------------------------------------------------------------------------------
|
|
|
|
_io = [
|
|
# Clk
|
|
("clk50", 0, Pins("23"), IOStandard("3.3-V LVTTL")),
|
|
|
|
# Leds
|
|
("user_led", 0, Pins("84"), IOStandard("3.3-V LVTTL")),
|
|
("user_led", 1, Pins("85"), IOStandard("3.3-V LVTTL")),
|
|
("user_led", 2, Pins("86"), IOStandard("3.3-V LVTTL")),
|
|
("user_led", 3, Pins("87"), IOStandard("3.3-V LVTTL")),
|
|
|
|
# Serial
|
|
("serial", 0,
|
|
# Uses the 9 pin serial connector
|
|
Subsignal("tx", Pins("114"), IOStandard("3.3-V LVTTL")),
|
|
Subsignal("rx", Pins("115"), IOStandard("3.3-V LVTTL"))
|
|
),
|
|
|
|
# SDRAM
|
|
("sdram_clock", 0, Pins("43"), IOStandard("3.3-V LVTTL")),
|
|
("sdram", 0,
|
|
Subsignal("a", Pins(
|
|
"76 77 80 83 68 67 66 65",
|
|
"64 60 75 59")),
|
|
Subsignal("ba", Pins("73 74")),
|
|
Subsignal("cs_n", Pins("72")),
|
|
Subsignal("cke", Pins("58")),
|
|
Subsignal("ras_n", Pins("71")),
|
|
Subsignal("cas_n", Pins("70")),
|
|
Subsignal("we_n", Pins("69")),
|
|
Subsignal("dq", Pins(
|
|
"28 30 31 32 33 34 38 39",
|
|
"54 53 52 51 50 49 46 44")),
|
|
Subsignal("dm", Pins("42 55")),
|
|
IOStandard("3.3-V LVTTL")
|
|
),
|
|
]
|
|
|
|
# Platform -----------------------------------------------------------------------------------------
|
|
|
|
class Platform(AlteraPlatform):
|
|
default_clk_name = "clk50"
|
|
default_clk_period = 1e9/50e6
|
|
|
|
def __init__(self, toolchain="quartus"):
|
|
AlteraPlatform.__init__(self, "EP4CE6E22C8", _io, toolchain=toolchain)
|
|
|
|
def create_programmer(self):
|
|
return USBBlaster()
|
|
|
|
def do_finalize(self, fragment):
|
|
AlteraPlatform.do_finalize(self, fragment)
|
|
self.add_period_constraint(self.lookup_request("clk50", loose=True), 1e9/50e6)
|