102 lines
4.4 KiB
Python
102 lines
4.4 KiB
Python
# This file is Copyright (c) 2020 Antmicro <www.antmicro.com>
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# License: BSD
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from litex.build.generic_platform import *
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from litex.build.xilinx import XilinxPlatform, VivadoProgrammer
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# IOs ----------------------------------------------------------------------------------------------
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_io = [
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("clk100", 0,
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Subsignal("n", Pins("AD4"), IOStandard("DIFF_SSTL12_DCI")),
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Subsignal("p", Pins("AD5"), IOStandard("DIFF_SSTL12_DCI")),
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),
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("clk100_gtr", 0,
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Subsignal("p", Pins("C21"), IOStandard("DIFF_SSTL12")),
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Subsignal("n", Pins("C22"), IOStandard("DIFF_SSTL12")),
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),
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("clk27_gtr", 0,
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Subsignal("p", Pins("A21"), IOStandard("DIFF_SSTL12")),
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Subsignal("n", Pins("A22"), IOStandard("DIFF_SSTL12")),
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),
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("clk33", 0, Pins("AD4"), IOStandard("SSTL12")),
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("cpu_reset", 0, Pins("N19"), IOStandard("LVCMOS33")),
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("user_led", 0, Pins("H2"), IOStandard("LVCMOS18")),
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("user_led", 1, Pins("P9"), IOStandard("LVCMOS18")),
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("user_led", 2, Pins("K5"), IOStandard("LVCMOS18")),
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("serial", 0,
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Subsignal("rx", Pins("AA10")), # Module connector A: A60 (Meccury PE1: "IO B" connector 32)
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Subsignal("tx", Pins("AA11")), # Module connector A: A58 (Meccury PE1: "IO B" connector 31)
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IOStandard("LVCMOS33"),
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),
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("i2c", 0,
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Subsignal("scl", Pins("D12")),
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Subsignal("sda", Pins("C12")),
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IOStandard("LVCMOS18")
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),
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("ddram", 0,
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Subsignal("a", Pins(
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"AC4 AC3 AB4 AB3 AB2 AC2 AB1 AC1",
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"AB5 AG4 AH4 AG3 AH3 AE3"), IOStandard("SSTL12_DCI")),
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Subsignal("we_n", Pins("AF3"), IOStandard("SSTL12_DCI")), # A14
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Subsignal("cas_n", Pins("AE2"), IOStandard("SSTL12_DCI")), # A15
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Subsignal("ras_n", Pins("AF2"), IOStandard("SSTL12_DCI")), # A16
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Subsignal("ba", Pins("AH1 AF1"), IOStandard("SSTL12_DCI")),
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Subsignal("bg", Pins("AG1"), IOStandard("SSTL12_DCI")),
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Subsignal("cs_n", Pins("AH9"), IOStandard("SSTL12_DCI")),
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Subsignal("act_n", Pins("AH2"), IOStandard("SSTL12_DCI")),
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Subsignal("dm", Pins("AC9 AG9"), IOStandard("POD12_DCI")),
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Subsignal("dq", Pins(
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"AB6 AC6 AE9 AE8 AB8 AC8 AB7 AC7",
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"AE5 AF5 AF8 AG8 AH8 AH7 AF7 AF6"), IOStandard("POD12_DCI"),
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Misc("PRE_EMPHASIS=RDRV_240"),
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Misc("EQUALIZATION=EQ_LEVEL2")),
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Subsignal("dqs_p", Pins("AD7 AG6"), IOStandard("DIFF_POD12_DCI"),
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Misc("PRE_EMPHASIS=RDRV_240"),
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Misc("EQUALIZATION=EQ_LEVEL2")),
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Subsignal("dqs_n", Pins("AE7 AG5"), IOStandard("DIFF_POD12_DCI"),
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Misc("PRE_EMPHASIS=RDRV_240"),
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Misc("EQUALIZATION=EQ_LEVEL2")),
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Subsignal("clk_p", Pins("AD2"), IOStandard("DIFF_SSTL12_DCI")),
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Subsignal("clk_n", Pins("AD1"), IOStandard("DIFF_SSTL12_DCI")),
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Subsignal("cke", Pins("AH6"), IOStandard("SSTL12_DCI")),
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Subsignal("odt", Pins("AE4"), IOStandard("SSTL12_DCI")),
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Subsignal("reset_n", Pins("G4"), IOStandard("LVCMOS18")),
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Misc("SLEW=FAST"),
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),
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]
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# Connectors ---------------------------------------------------------------------------------------
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_connectors = []
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# Platform -----------------------------------------------------------------------------------------
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class Platform(XilinxPlatform):
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default_clk_name = "clk100"
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default_clk_period = 1e9/100e6
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def __init__(self):
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XilinxPlatform.__init__(self, "xczu2eg-sfvc784-1-i", _io, _connectors, toolchain="vivado")
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def create_programmer(self):
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return VivadoProgrammer()
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def do_finalize(self, fragment):
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XilinxPlatform.do_finalize(self, fragment)
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self.add_period_constraint(self.lookup_request("clk100", loose=True), 1e9/100e6)
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self.add_period_constraint(self.lookup_request("clk100_gtr", loose=True), 1e9/100e6)
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self.add_period_constraint(self.lookup_request("clk27_gtr", loose=True), 1e9/27e6)
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self.add_period_constraint(self.lookup_request("clk33", loose=True), 1e9/33e6)
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self.add_platform_command("set_property BITSTREAM.CONFIG.OVERTEMPSHUTDOWN ENABLE [current_design]")
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self.add_platform_command("set_property BITSTREAM.CONFIG.UNUSEDPIN PULLNONE [current_design]")
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self.add_platform_command("set_property INTERNAL_VREF 0.84 [get_iobanks 64]")
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