54 lines
1.8 KiB
Python
54 lines
1.8 KiB
Python
#
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# This file is part of LiteX-Boards.
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#
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# Copyright (c) 2022 Icenowy Zheng <uwu@icenowy.me>
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# SPDX-License-Identifier: BSD-2-Clause
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from litex.build.generic_platform import *
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from litex.build.altera import AlteraPlatform
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from litex.build.altera.programmer import USBBlaster
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# IOs ----------------------------------------------------------------------------------------------
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_io = [
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# Clk
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("clk25", 0, Pins("AB11"), IOStandard("3.3-V LVTTL")),
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("clk27", 0, Pins("A11"), IOStandard("3.3-V LVTTL")),
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# Rst
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("cpu_reset_n", 0, Pins("N21"), IOStandard("1.8-V")), # N21
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# Serial
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("serial", 0,
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Subsignal("tx", Pins("V3"), IOStandard("3.3-V LVTTL")), # GPIOs close to voltage selector
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Subsignal("rx", Pins("AA1"), IOStandard("3.3-V LVTTL"))
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),
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# LEDs
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("user_led_n", 0, Pins("A5"), IOStandard("3.3-V LVTTL")), # D3
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("user_led_n", 1, Pins("B5"), IOStandard("3.3-V LVTTL")), # D4
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("user_led_n", 2, Pins("C4"), IOStandard("3.3-V LVTTL")), # D5
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("user_led_n", 3, Pins("C3"), IOStandard("3.3-V LVTTL")), # D6
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# Buttons
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("user_btn_n", 0, Pins("T1"), IOStandard("3.3-V LVTTL")), # K3
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("user_btn_n", 1, Pins("N22"), IOStandard("3.3-V LVTTL")), # K4
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]
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# Platform -----------------------------------------------------------------------------------------
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class Platform(AlteraPlatform):
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default_clk_name = "clk25"
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default_clk_period = 1e9/25e6
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def __init__(self, toolchain="quartus"):
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AlteraPlatform.__init__(self, "EP4CE115F23I7", _io, toolchain=toolchain)
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def create_programmer(self):
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return USBBlaster()
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def do_finalize(self, fragment):
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AlteraPlatform.do_finalize(self, fragment)
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self.add_period_constraint(self.lookup_request("clk25", loose=True), 1e9/25e6)
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self.add_period_constraint(self.lookup_request("clk27", loose=True), 1e9/27e6)
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