litex-boards/litex_boards/platforms/taobao_a_e115fb.py

54 lines
1.8 KiB
Python

#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2022 Icenowy Zheng <uwu@icenowy.me>
# 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
("clk25", 0, Pins("AB11"), IOStandard("3.3-V LVTTL")),
("clk27", 0, Pins("A11"), IOStandard("3.3-V LVTTL")),
# Rst
("cpu_reset_n", 0, Pins("N21"), IOStandard("1.8-V")), # N21
# Serial
("serial", 0,
Subsignal("tx", Pins("V3"), IOStandard("3.3-V LVTTL")), # GPIOs close to voltage selector
Subsignal("rx", Pins("AA1"), IOStandard("3.3-V LVTTL"))
),
# LEDs
("user_led_n", 0, Pins("A5"), IOStandard("3.3-V LVTTL")), # D3
("user_led_n", 1, Pins("B5"), IOStandard("3.3-V LVTTL")), # D4
("user_led_n", 2, Pins("C4"), IOStandard("3.3-V LVTTL")), # D5
("user_led_n", 3, Pins("C3"), IOStandard("3.3-V LVTTL")), # D6
# Buttons
("user_btn_n", 0, Pins("T1"), IOStandard("3.3-V LVTTL")), # K3
("user_btn_n", 1, Pins("N22"), IOStandard("3.3-V LVTTL")), # K4
]
# Platform -----------------------------------------------------------------------------------------
class Platform(AlteraPlatform):
default_clk_name = "clk25"
default_clk_period = 1e9/25e6
def __init__(self, toolchain="quartus"):
AlteraPlatform.__init__(self, "EP4CE115F23I7", _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("clk25", loose=True), 1e9/25e6)
self.add_period_constraint(self.lookup_request("clk27", loose=True), 1e9/27e6)