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litex-boards/litex_boards/platforms/digilent_atlys.py

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#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2015-2021 HDMI2USB/LiteX developers
# SPDX-License-Identifier: BSD-2-Clause
from litex.build.generic_platform import *
from litex.build.xilinx import XilinxSpartan6Platform
# IOs ----------------------------------------------------------------------------------------------
_io = [
# Clk/Rst
("clk100", 0, Pins("L15"), IOStandard("LVCMOS33")),
("cpu_reset", 0, Pins("T15"), IOStandard("LVCMOS33")),
# Serial
("serial", 0,
Subsignal("rx", Pins("A16"), IOStandard("LVCMOS33")),
Subsignal("tx", Pins("B16"), IOStandard("LVCMOS33")),
),
# FX2
("fx2", 0,
Subsignal("ifclk", Pins("C10")),
Subsignal("data", Pins("A2 D6 C6 B3 A3 B4 A4 C5")),
Subsignal("addr", Pins("A14 B14"), Misc("DRIVE=12")),
Subsignal("flaga", Pins("B9"), Misc("DRIVE=12")),
Subsignal("flagb", Pins("A9"), Misc("DRIVE=12")),
Subsignal("flagc", Pins("C15"), Misc("DRIVE=12")),
Subsignal("rd_n", Pins("F13"), Misc("DRIVE=12")),
Subsignal("wr_n", Pins("E13")),
Subsignal("oe_n", Pins("A15"), Misc("DRIVE=12")),
Subsignal("cs_n", Pins("B2")),
Subsignal("pktend_n", Pins("C4"), Misc("DRIVE=12")),
IOStandard("LVCMOS33")
),
# SPI Flash
("spiflash4x", 0,
Subsignal("cs_n", Pins("V3")),
Subsignal("clk", Pins("R15")),
Subsignal("dq", Pins("T13", "R13", "T14", "V14")),
IOStandard("LVCMOS33"),
Misc("SLEW=FAST"),
),
# Leds
("user_led", 0, Pins("U18"), IOStandard("LVCMOS33")),
("user_led", 1, Pins("M14"), IOStandard("LVCMOS33")),
("user_led", 2, Pins("N14"), IOStandard("LVCMOS33")),
("user_led", 3, Pins("L14"), IOStandard("LVCMOS33")),
("user_led", 4, Pins("M13"), IOStandard("LVCMOS33")),
("user_led", 5, Pins("D4"), IOStandard("LVCMOS33")),
("user_led", 6, Pins("P16"), IOStandard("LVCMOS33")),
("user_led", 7, Pins("N12"), IOStandard("LVCMOS33")),
# Buttons
("user_btn", 0, Pins("N4"), IOStandard("LVCMOS18")), # North button
("user_btn", 1, Pins("P4"), IOStandard("LVCMOS18")), # East button
("user_btn", 2, Pins("P3"), IOStandard("LVCMOS18")), # South button
("user_btn", 3, Pins("F6"), IOStandard("LVCMOS18")), # West button
("user_btn", 4, Pins("F5"), IOStandard("LVCMOS18")), # Center button
# Switches.
("user_sw", 0, Pins("A10"), IOStandard("LVCMOS33")),
("user_sw", 1, Pins("D14"), IOStandard("LVCMOS33")),
("user_sw", 2, Pins("C14"), IOStandard("LVCMOS33")),
("user_sw", 3, Pins("P15"), IOStandard("LVCMOS33")),
("user_sw", 4, Pins("P12"), IOStandard("LVCMOS33")),
("user_sw", 5, Pins("R5"), IOStandard("LVCMOS33")),
("user_sw", 6, Pins("T5"), IOStandard("LVCMOS33")),
("user_sw", 7, Pins("E4"), IOStandard("LVCMOS18")),
# GMII/MII Ethernet
("eth_clocks", 0,
Subsignal("tx", Pins("K16")),
Subsignal("gtx", Pins("L12")),
Subsignal("rx", Pins("K15")),
IOStandard("LVCMOS33")
),
("eth", 0,
Subsignal("rst_n", Pins("G13")),
Subsignal("int_n", Pins("L16")),
Subsignal("mdio", Pins("N17")),
Subsignal("mdc", Pins("F16")),
Subsignal("rx_dv", Pins("F17")),
Subsignal("rx_er", Pins("F18")),
Subsignal("rx_data", Pins("G16 H14 E16 F15 F14 E18 D18 D17")),
Subsignal("tx_en", Pins("H15")),
Subsignal("tx_er", Pins("G18")),
Subsignal("tx_data", Pins("H16 H13 K14 K13 J13 G14 H12 K12")),
Subsignal("col", Pins("C17")),
Subsignal("crs", Pins("C18")),
IOStandard("LVCMOS33")
),
# DDR2 SDRAM.
("ddram_clock", 0,
Subsignal("p", Pins("G3")),
Subsignal("n", Pins("G1")),
IOStandard("DIFF_SSTL18_II"), Misc("IN_TERM=NONE")
),
("ddram", 0,
Subsignal("cke", Pins("H7"), IOStandard("SSTL18_II")),
Subsignal("ras_n", Pins("L5"), IOStandard("SSTL18_II")),
Subsignal("cas_n", Pins("K5"), IOStandard("SSTL18_II")),
Subsignal("we_n", Pins("E3"), IOStandard("SSTL18_II")),
Subsignal("ba", Pins("F2 F1 E1"), IOStandard("SSTL18_II")),
Subsignal("a", Pins(
"J7 J6 H5 L7 F3 H4 H3 H6",
"D2 D1 F4 D3 G6"),
IOStandard("SSTL18_II")),
Subsignal("dq", Pins(
"L2 L1 K2 K1 H2 H1 J3 J1",
"M3 M1 N2 N1 T2 T1 U2 U1"),
IOStandard("SSTL18_II")),
Subsignal("dqs", Pins("P2 L4"), IOStandard("DIFF_SSTL18_II")),
Subsignal("dqs_n", Pins("P1 L3"), IOStandard("DIFF_SSTL18_II")),
Subsignal("dm", Pins("K4 K3"), IOStandard("SSTL18_II")),
Subsignal("odt", Pins("K6"), IOStandard("SSTL18_II"))
),
# HDMI Out 0
("hdmi_out", 0,
Subsignal("clk_p", Pins("B6"), IOStandard("TMDS_33")),
Subsignal("clk_n", Pins("A6"), IOStandard("TMDS_33")),
Subsignal("data0_p", Pins("D8"), IOStandard("TMDS_33")),
Subsignal("data0_n", Pins("C8"), IOStandard("TMDS_33")),
Subsignal("data1_p", Pins("C7"), IOStandard("TMDS_33")),
Subsignal("data1_n", Pins("A7"), IOStandard("TMDS_33")),
Subsignal("data2_p", Pins("B8"), IOStandard("TMDS_33")),
Subsignal("data2_n", Pins("A8"), IOStandard("TMDS_33")),
Subsignal("scl", Pins("D9"), IOStandard("I2C")),
Subsignal("sda", Pins("C9"), IOStandard("I2C")),
),
# HDMI In 0
("hdmi_in", 0,
Subsignal("clk_p", Pins("D11")),
Subsignal("clk_n", Pins("C11")),
Subsignal("data0_p", Pins("G9")),
Subsignal("data0_n", Pins("F9")),
Subsignal("data1_p", Pins("B11")),
Subsignal("data1_n", Pins("A11")),
Subsignal("data2_p", Pins("B12")),
Subsignal("data2_n", Pins("A12")),
Subsignal("scl", Pins("C13"), IOStandard("LVCMOS33")),
Subsignal("sda", Pins("A13"), IOStandard("LVCMOS33")),
),
# HDMI In 1
("hdmi_in", 1,
Subsignal("clk_p", Pins("H17")),
Subsignal("clk_n", Pins("H18")),
Subsignal("data0_p", Pins("K17")),
Subsignal("data0_n", Pins("K18")),
Subsignal("data1_p", Pins("L17")),
Subsignal("data1_n", Pins("L18")),
Subsignal("data2_p", Pins("J16")),
Subsignal("data2_n", Pins("J18")),
Subsignal("scl", Pins("M16"), IOStandard("LVCMOS33")),
Subsignal("sda", Pins("M18"), IOStandard("LVCMOS33")),
),
]
# Connectors ---------------------------------------------------------------------------------------
_connectors = [
("VHDCI",
{
"EXP-IO1_P" : "U16",
"EXP-IO2_P" : "U15",
"EXP-IO3_P" : "U13",
"EXP-IO4_P" : "M11",
"EXP-IO5_P" : "R11",
"EXP-IO6_P" : "T12",
"EXP-IO7_P" : "N10",
"EXP-IO8_P" : "M10",
"EXP-IO9_P" : "U11",
"EXP-IO10_P" : "R10",
"EXP-IO11_P" : "U10",
"EXP-IO12_P" : "R8",
"EXP-IO13_P" : "M8",
"EXP-IO14_P" : "U8",
"EXP-IO15_P" : "U7",
"EXP-IO16_P" : "N7",
"EXP-IO17_P" : "T6",
"EXP-IO18_P" : "R7",
"EXP-IO19_P" : "N6",
"EXP-IO20_P" : "U5",
"EXP-IO1_N" : "V16",
"EXP-IO2_N" : "V15",
"EXP-IO3_N" : "V13",
"EXP-IO4_N" : "N11",
"EXP-IO5_N" : "T11",
"EXP-IO6_N" : "V12",
"EXP-IO7_N" : "P11",
"EXP-IO8_N" : "N9",
"EXP-IO9_N" : "V11",
"EXP-IO10_N" : "T10",
"EXP-IO11_N" : "V10",
"EXP-IO12_N" : "T8",
"EXP-IO13_N" : "N8",
"EXP-IO14_N" : "V8",
"EXP-IO15_N" : "V7",
"EXP-IO16_N" : "P8",
"EXP-IO17_N" : "V6",
"EXP-IO18_N" : "T7",
"EXP-IO19_N" : "P7",
"EXP-IO20_N" : "V5",
}
),
]
# Platform -----------------------------------------------------------------------------------------
class Platform(XilinxSpartan6Platform):
default_clk_name = "clk100"
default_clk_period = 1e9/100e6
def __init__(self, toolchain="ise"):
XilinxSpartan6Platform.__init__(self, "xc6slx45-csg324-3", _io, _connectors, toolchain=toolchain)
self.add_platform_command("""CONFIG VCCAUX="3.3";""")
def create_programmer(self):
return iMPACT()
def do_finalize(self, fragment):
XilinxSpartan6Platform.do_finalize(self, fragment)
self.add_period_constraint(self.lookup_request("clk100", loose=True), 1e9/100e6)
self.add_period_constraint(self.lookup_request("hdmi_in:clk_p", 0, loose=True), 1e9/74.25e6)
self.add_period_constraint(self.lookup_request("hdmi_in:clk_p", 1, loose=True), 1e9/74.25e6)
self.add_period_constraint(self.lookup_request("eth_clocks:rx", loose=True), 1e9/25e6)
self.add_period_constraint(self.lookup_request("fx2:ifclk", loose=True), 1e9/100e6)
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