137 lines
4.7 KiB
Python
137 lines
4.7 KiB
Python
# This file is Copyright (c) 2015-2019 Florent Kermarrec <florent@enjoy-digital.fr>
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# License: BSD
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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 LatticeProgrammer
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# IOs ----------------------------------------------------------------------------------------------
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_io = [
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("clk100", 0, Pins("L5"), IOStandard("LVDS25")),
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("rst_n", 0, Pins("A21"), IOStandard("LVCMOS33")),
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("user_led", 0, Pins("Y20"), IOStandard("LVCMOS33")),
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("user_led", 1, Pins("AA21"), IOStandard("LVCMOS33")),
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("user_led", 2, Pins("U18"), IOStandard("LVCMOS33")),
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("user_led", 3, Pins("U19"), IOStandard("LVCMOS33")),
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("user_led", 4, Pins("W19"), IOStandard("LVCMOS33")),
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("user_led", 5, Pins("V19"), IOStandard("LVCMOS33")),
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("user_led", 6, Pins("AB20"), IOStandard("LVCMOS33")),
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("user_led", 7, Pins("AA20"), IOStandard("LVCMOS33")),
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("user_dip_btn", 0, Pins("J7"), IOStandard("LVCMOS15")),
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("user_dip_btn", 1, Pins("J6"), IOStandard("LVCMOS15")),
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("user_dip_btn", 2, Pins("H2"), IOStandard("LVCMOS15")),
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("user_dip_btn", 3, Pins("H3"), IOStandard("LVCMOS15")),
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("user_dip_btn", 4, Pins("J3"), IOStandard("LVCMOS15")),
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("user_dip_btn", 5, Pins("K3"), IOStandard("LVCMOS15")),
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("user_dip_btn", 6, Pins("J2"), IOStandard("LVCMOS15")),
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("user_dip_btn", 7, Pins("J1"), IOStandard("LVCMOS15")),
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("serial", 0,
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Subsignal("tx", Pins("B11"), IOStandard("LVCMOS33")), # X4 IO0
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Subsignal("rx", Pins("B12"), IOStandard("LVCMOS33")), # X4 IO1
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),
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("eth_clocks", 0,
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Subsignal("tx", Pins("C12")),
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Subsignal("gtx", Pins("M2")),
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Subsignal("rx", Pins("L4")),
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IOStandard("LVCMOS33")
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),
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("eth", 0,
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Subsignal("rst_n", Pins("L3")),
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Subsignal("mdio", Pins("L2")),
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Subsignal("mdc", Pins("V4")),
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Subsignal("dv", Pins("M1")),
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Subsignal("rx_er", Pins("M4")),
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Subsignal("rx_data", Pins("M5 N1 N6 P6 T2 R2 P5 P3")),
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Subsignal("tx_en", Pins("V3")),
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Subsignal("tx_data", Pins("V1 U1 R3 P1 N5 N3 N4 N2")),
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Subsignal("col", Pins("R1")),
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Subsignal("crs", Pins("P4")),
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IOStandard("LVCMOS33")
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),
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("eth_clocks", 1,
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Subsignal("tx", Pins("M21")),
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Subsignal("gtx", Pins("M19")),
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Subsignal("rx", Pins("N19")),
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IOStandard("LVCMOS33")
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),
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("eth", 1,
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Subsignal("rst_n", Pins("R21")),
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Subsignal("mdio", Pins("U16")),
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Subsignal("mdc", Pins("Y18")),
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Subsignal("dv", Pins("U15")),
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Subsignal("rx_er", Pins("V20")),
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Subsignal("rx_data", Pins("AB17 AA17 R19 V21 T17 R18 W21 Y21")),
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Subsignal("tx_en", Pins("V22")),
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Subsignal("tx_data", Pins("W22 R16 P17 Y22 T21 U22 P20 U20")),
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Subsignal("col", Pins("N18")),
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Subsignal("crs", Pins("P19")),
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IOStandard("LVCMOS33")
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),
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]
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# Platform -----------------------------------------------------------------------------------------
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class Platform(LatticePlatform):
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default_clk_name = "clk100"
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default_clk_period = 10
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def __init__(self):
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LatticePlatform.__init__(self, "LFE3-35EA-6FN484C", _io)
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def do_finalize(self, fragment):
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LatticePlatform.do_finalize(self, fragment)
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try:
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self.add_period_constraint(self.lookup_request("eth_clocks", 0).rx, 1e9/125e6)
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except ConstraintError:
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pass
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try:
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self.add_period_constraint(self.lookup_request("eth_clocks", 1).rx, 1e9/125e6)
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except ConstraintError:
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pass
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def create_programmer(self):
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_xcf_template = """
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<?xml version='1.0' encoding='utf-8' ?>
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<!DOCTYPE ispXCF SYSTEM "IspXCF.dtd" >
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<ispXCF version="3.4.1">
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<Comment></Comment>
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<Chain>
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<Comm>JTAG</Comm>
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<Device>
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<SelectedProg value="TRUE"/>
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<Pos>1</Pos>
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<Vendor>Lattice</Vendor>
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<Family>LatticeECP3</Family>
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<Name>LFE3-35EA</Name>
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<File>{bitstream_file}</File>
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<Operation>Fast Program</Operation>
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</Device>
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</Chain>
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<ProjectOptions>
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<Program>SEQUENTIAL</Program>
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<Process>ENTIRED CHAIN</Process>
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<OperationOverride>No Override</OperationOverride>
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<StartTAP>TLR</StartTAP>
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<EndTAP>TLR</EndTAP>
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<VerifyUsercode value="FALSE"/>
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</ProjectOptions>
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<CableOptions>
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<CableName>USB2</CableName>
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<PortAdd>FTUSB-0</PortAdd>
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<USBID>Dual RS232-HS A Location 0000 Serial A</USBID>
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<JTAGPinSetting>
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TRST ABSENT;
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ISPEN ABSENT;
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</JTAGPinSetting>
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</CableOptions>
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</ispXCF>
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"""
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return LatticeProgrammer(_xcf_template)
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