144 lines
5.5 KiB
Python
144 lines
5.5 KiB
Python
#
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# This file is part of LiteX-Boards.
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#
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# Copyright (c) 2020-2021 Xuanyu Hu <xuanyu.hu@whu.edu.cn>
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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.xilinx import Xilinx7SeriesPlatform, VivadoProgrammer
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from litex.build.openocd import OpenOCD
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# IOs ----------------------------------------------------------------------------------------------
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_io = [
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# Clk / Rst
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("clk100", 0, Pins("W5"), IOStandard("LVCMOS33")),
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# Leds
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("user_led", 0, Pins("U16"), IOStandard("LVCMOS33")),
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("user_led", 1, Pins("E19"), IOStandard("LVCMOS33")),
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("user_led", 2, Pins("U19"), IOStandard("LVCMOS33")),
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("user_led", 3, Pins("V19"), IOStandard("LVCMOS33")),
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("user_led", 4, Pins("W18"), IOStandard("LVCMOS33")),
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("user_led", 5, Pins("U15"), IOStandard("LVCMOS33")),
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("user_led", 6, Pins("U14"), IOStandard("LVCMOS33")),
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("user_led", 7, Pins("V14"), IOStandard("LVCMOS33")),
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("user_led", 8, Pins("V13"), IOStandard("LVCMOS33")),
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("user_led", 9, Pins("V3"), IOStandard("LVCMOS33")),
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("user_led", 10, Pins("W3"), IOStandard("LVCMOS33")),
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("user_led", 11, Pins("U3"), IOStandard("LVCMOS33")),
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("user_led", 12, Pins("P3"), IOStandard("LVCMOS33")),
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("user_led", 13, Pins("N3"), IOStandard("LVCMOS33")),
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("user_led", 14, Pins("P1"), IOStandard("LVCMOS33")),
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("user_led", 15, Pins("L1"), IOStandard("LVCMOS33")),
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# Switches
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("user_sw", 0, Pins("V17"), IOStandard("LVCMOS33")),
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("user_sw", 1, Pins("V16"), IOStandard("LVCMOS33")),
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("user_sw", 2, Pins("W16"), IOStandard("LVCMOS33")),
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("user_sw", 3, Pins("W17"), IOStandard("LVCMOS33")),
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("user_sw", 4, Pins("W15"), IOStandard("LVCMOS33")),
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("user_sw", 5, Pins("V15"), IOStandard("LVCMOS33")),
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("user_sw", 6, Pins("W14"), IOStandard("LVCMOS33")),
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("user_sw", 7, Pins("W13"), IOStandard("LVCMOS33")),
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("user_sw", 8, Pins("V2"), IOStandard("LVCMOS33")),
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("user_sw", 9, Pins("T3"), IOStandard("LVCMOS33")),
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("user_sw", 10, Pins("T2"), IOStandard("LVCMOS33")),
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("user_sw", 11, Pins("R3"), IOStandard("LVCMOS33")),
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("user_sw", 12, Pins("W2"), IOStandard("LVCMOS33")),
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("user_sw", 13, Pins("U1"), IOStandard("LVCMOS33")),
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("user_sw", 14, Pins("T1"), IOStandard("LVCMOS33")),
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("user_sw", 15, Pins("R2"), IOStandard("LVCMOS33")),
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# Buttons
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("user_btnu", 0, Pins("T18"), IOStandard("LVCMOS33")),
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("user_btnd", 0, Pins("U17"), IOStandard("LVCMOS33")),
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("user_btnl", 0, Pins("W19"), IOStandard("LVCMOS33")),
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("user_btnr", 0, Pins("T17"), IOStandard("LVCMOS33")),
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("user_btnc", 0, Pins("U18"), IOStandard("LVCMOS33")),
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# Serial
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("serial", 0,
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Subsignal("tx", Pins("A18")),
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Subsignal("rx", Pins("B18")),
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IOStandard("LVCMOS33"),
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),
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# VGA
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("vga", 0,
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Subsignal("hsync_n", Pins("P19")),
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Subsignal("vsync_n", Pins("R19")),
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Subsignal("r", Pins("G19 H19 J19 N19")),
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Subsignal("g", Pins("J17 H17 G17 D17")),
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Subsignal("b", Pins("N18 L18 K18 J18")),
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IOStandard("LVCMOS33")
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),
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# USB PS/2
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("usbhost", 0,
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Subsignal("ps2_clk", Pins("B6")),
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Subsignal("ps2_data", Pins("A6")),
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IOStandard("LVCMOS33")
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),
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("gpio", 0,
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Subsignal("a", Pins("J1 L2 J2 G2 H1 K2 H2 G3")),
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Subsignal("b", Pins("A14 A16 B15 B16 A15 A17 C15 C16")),
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Subsignal("c0", Pins("K17")),
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Subsignal("c1", Pins("M18")),
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Subsignal("c6", Pins("L17")),
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Subsignal("c7", Pins("M19")),
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Subsignal("xadc", Pins("J3 L3 M2 N2 K3 M3 M1 N1")),
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IOStandard("LVCMOS33"))
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]
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# Connectors ---------------------------------------------------------------------------------------
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_connectors = [
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("pmoda", "J1 L2 J2 G2 H1 K2 H2 G3"),
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("pmodb", "A14 A16 B15 B16 A15 A17 C15 C16"),
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("pmodc", "K17 M18 N17 P18 L17 M19 P17 R18"),
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("pmodxdac", " J3 L3 M2 N2 K3 M3 M1 N1"),
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]
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# PMODS --------------------------------------------------------------------------------------------
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def sdcard_pmod_io(pmod):
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return [
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# SDCard PMOD:
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# - https://store.digilentinc.com/pmod-microsd-microsd-card-slot/
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("spisdcard", 0,
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Subsignal("clk", Pins(f"{pmod}:3")),
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Subsignal("mosi", Pins(f"{pmod}:1"), Misc("PULLUP True")),
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Subsignal("cs_n", Pins(f"{pmod}:0"), Misc("PULLUP True")),
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Subsignal("miso", Pins(f"{pmod}:2"), Misc("PULLUP True")),
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Misc("SLEW=FAST"),
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IOStandard("LVCMOS33"),
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),
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("sdcard", 0,
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Subsignal("data", Pins(f"{pmod}:2 {pmod}:4 {pmod}:5 {pmod}:0"), Misc("PULLUP True")),
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Subsignal("cmd", Pins(f"{pmod}:1"), Misc("PULLUP True")),
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Subsignal("clk", Pins(f"{pmod}:3")),
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Subsignal("cd", Pins(f"{pmod}:6")),
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Misc("SLEW=FAST"),
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IOStandard("LVCMOS33"),
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),
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]
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_sdcard_pmod_io = sdcard_pmod_io("pmoda") # SDCARD PMOD on JD.
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class Platform(Xilinx7SeriesPlatform):
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default_clk_name = "clk100"
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default_clk_period = 1e9/100e6
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def __init__(self, toolchain="vivado"):
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Xilinx7SeriesPlatform.__init__(self, "xc7a35t-CPG236-1", _io, _connectors, toolchain=toolchain)
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def create_programmer(self):
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return OpenOCD("openocd_xc7_ft2232.cfg", "bscan_spi_xc7a35t.bit")
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def do_finalize(self, fragment):
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Xilinx7SeriesPlatform.do_finalize(self, fragment)
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self.add_period_constraint(self.lookup_request("clk100", loose=True), 1e9/100e6)
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