2021-09-01 11:33:54 -04:00
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#
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# This file is part of LiteX-Boards.
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#
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# Copyright (c) 2021 Greg Davill <greg.davill@gmail.com>
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# Copyright (c) 2021 Florent Kermarrec <florent@enjoy-digital.fr>
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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.lattice import LatticePlatform
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from litex.build.lattice.programmer import OpenOCDJTAGProgrammer
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# IOs ----------------------------------------------------------------------------------------------
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_io_r1_0 = [
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# Clk
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("clk30", 0, Pins("B12"), IOStandard("LVCMOS33")),
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# Leds
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("user_led", 0, Pins("C13"), IOStandard("LVCMOS33")),
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("user_led", 1, Pins("D12"), IOStandard("LVCMOS33")),
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("user_led", 2, Pins(" U2"), IOStandard("LVCMOS33")),
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("user_led", 3, Pins(" T3"), IOStandard("LVCMOS33")),
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("user_led", 4, Pins("D13"), IOStandard("LVCMOS33")),
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("user_led", 5, Pins("E13"), IOStandard("LVCMOS33")),
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("user_led", 6, Pins("C16"), IOStandard("LVCMOS33")),
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("user_led_color", 0, Pins("T1 R1 U1"), IOStandard("LVCMOS33")),
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# Buttons
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("user_btn", 0, Pins("U16"), IOStandard("SSTL135_I")),
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("user_btn", 1, Pins("T17"), IOStandard("SSTL135_I")),
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2021-09-01 12:03:13 -04:00
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# RGMII Ethernet
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("eth_clocks", 0,
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Subsignal("tx", Pins("E15")),
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Subsignal("rx", Pins("D11")),
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IOStandard("LVCMOS33"),
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Misc("SLEWRATE=FAST"),
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),
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("eth", 0,
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Subsignal("rst_n", Pins("B20")),
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Subsignal("mdio", Pins("D16")),
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Subsignal("mdc", Pins("A19")),
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Subsignal("rx_data", Pins("A16 C17 B17 A17")),
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Subsignal("tx_ctl", Pins("D15")),
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Subsignal("rx_ctl", Pins("B18")),
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Subsignal("tx_data", Pins("C15 B16 A18 B19")),
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IOStandard("LVCMOS33"),
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Misc("SLEWRATE=FAST")
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),
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2021-09-01 11:33:54 -04:00
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]
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# Connectors ---------------------------------------------------------------------------------------
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_connectors_r1_0 = []
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# Platform -----------------------------------------------------------------------------------------
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class Platform(LatticePlatform):
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default_clk_name = "clk30"
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default_clk_period = 1e9/30e6
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def __init__(self, revision="1.0", device="85F", toolchain="trellis", **kwargs):
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assert revision in ["1.0"]
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self.revision = revision
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io = {"1.0": _io_r1_0}[revision]
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connectors = {"1.0": _connectors_r1_0}[revision]
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LatticePlatform.__init__(self, f"LFE5UM5G-{device}-8BG381C", io, connectors, toolchain=toolchain, **kwargs)
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def create_programmer(self):
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return OpenOCDJTAGProgrammer("openocd_butterstick.cfg")
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def do_finalize(self, fragment):
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LatticePlatform.do_finalize(self, fragment)
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self.add_period_constraint(self.lookup_request("clk30", loose=True), 1e9/30e6)
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