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litex-boards/litex_boards/platforms/versa_ecp5.py

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# This file is Copyright (c) 2017 Sergiusz Bazanski <q3k@q3k.org>
# This file is Copyright (c) 2018-2019 Florent Kermarrec <florent@enjoy-digital.fr>
# License: BSD
from litex.build.generic_platform import *
from litex.build.lattice import LatticePlatform
# IOs ----------------------------------------------------------------------------------------------
_io = [
("clk100", 0, Pins("P3"), IOStandard("LVDS")),
("rst_n", 0, Pins("T1"), IOStandard("LVCMOS33")),
("user_led", 0, Pins("E16"), IOStandard("LVCMOS25")),
("user_led", 1, Pins("D17"), IOStandard("LVCMOS25")),
("user_led", 2, Pins("D18"), IOStandard("LVCMOS25")),
("user_led", 3, Pins("E18"), IOStandard("LVCMOS25")),
("user_led", 4, Pins("F17"), IOStandard("LVCMOS25")),
("user_led", 5, Pins("F18"), IOStandard("LVCMOS25")),
("user_led", 6, Pins("E17"), IOStandard("LVCMOS25")),
("user_led", 7, Pins("F16"), IOStandard("LVCMOS25")),
("user_dip_btn", 0, Pins("H2"), IOStandard("LVCMOS15")),
("user_dip_btn", 1, Pins("K3"), IOStandard("LVCMOS15")),
("user_dip_btn", 2, Pins("G3"), IOStandard("LVCMOS15")),
("user_dip_btn", 3, Pins("F2"), IOStandard("LVCMOS15")),
("user_dip_btn", 4, Pins("J18"), IOStandard("LVCMOS25")),
("user_dip_btn", 5, Pins("K18"), IOStandard("LVCMOS25")),
("user_dip_btn", 6, Pins("K19"), IOStandard("LVCMOS25")),
("user_dip_btn", 7, Pins("K20"), IOStandard("LVCMOS25")),
("serial", 0,
Subsignal("rx", Pins("C11"), IOStandard("LVCMOS33")),
Subsignal("tx", Pins("A11"), IOStandard("LVCMOS33")),
),
("spiflash", 0, # clock needs to be accessed through USRMCLK
Subsignal("cs_n", Pins("R2")),
Subsignal("mosi", Pins("W2")),
Subsignal("miso", Pins("V2")),
Subsignal("wp", Pins("Y2")),
Subsignal("hold", Pins("W1")),
IOStandard("LVCMOS33"),
),
("spiflash4x", 0, # clock needs to be accessed through USRMCLK
Subsignal("cs_n", Pins("R2")),
Subsignal("dq", Pins("W2 V2 Y2 W1")),
IOStandard("LVCMOS33")
),
("ddram", 0,
Subsignal("a", Pins(
"P2 C4 E5 F5 B3 F4 B5 E4",
"C5 E3 D5 B4 C3"),
IOStandard("SSTL135_I")),
Subsignal("ba", Pins("P5 N3 M3"), IOStandard("SSTL135_I")),
Subsignal("ras_n", Pins("P1"), IOStandard("SSTL135_I")),
Subsignal("cas_n", Pins("L1"), IOStandard("SSTL135_I")),
Subsignal("we_n", Pins("M1"), IOStandard("SSTL135_I")),
Subsignal("cs_n", Pins("K1"), IOStandard("SSTL135_I")),
Subsignal("dm", Pins("J4 H5"), IOStandard("SSTL135_I")),
Subsignal("dq", Pins(
"L5 F1 K4 G1 L4 H1 G2 J3",
"D1 C1 E2 C2 F3 A2 E1 B1"),
IOStandard("SSTL135_I"),
Misc("TERMINATION=75")),
Subsignal("dqs_p", Pins("K2 H4"), IOStandard("SSTL135D_I"),
Misc("TERMINATION=OFF"),
Misc("DIFFRESISTOR=100")),
Subsignal("clk_p", Pins("M4"), IOStandard("SSTL135D_I")),
Subsignal("cke", Pins("N2"), IOStandard("SSTL135_I")),
Subsignal("odt", Pins("L2"), IOStandard("SSTL135_I")),
Subsignal("reset_n", Pins("N4"), IOStandard("SSTL135_I")),
Misc("SLEWRATE=FAST"),
),
("eth_clocks", 0,
Subsignal("tx", Pins("P19")),
Subsignal("rx", Pins("L20")),
IOStandard("LVCMOS25")
),
("eth", 0,
Subsignal("rst_n", Pins("U17")),
Subsignal("mdio", Pins("U18")),
Subsignal("mdc", Pins("T18")),
Subsignal("rx_ctl", Pins("U19")),
Subsignal("rx_data", Pins("T20 U20 T19 R18")),
Subsignal("tx_ctl", Pins("R20")),
Subsignal("tx_data", Pins("N19 N20 P18 P20")),
IOStandard("LVCMOS25")
),
("eth_clocks", 1,
Subsignal("tx", Pins("C20")),
Subsignal("rx", Pins("J19")),
IOStandard("LVCMOS25")
),
("eth", 1,
Subsignal("rst_n", Pins("F20")),
Subsignal("mdio", Pins("H20")),
Subsignal("mdc", Pins("G19")),
Subsignal("rx_ctl", Pins("F19")),
Subsignal("rx_data", Pins("G18 G16 H18 H17")),
Subsignal("tx_ctl", Pins("E19")),
Subsignal("tx_data", Pins("J17 J16 D19 D20")),
IOStandard("LVCMOS25")
),
("ext_clk", 0,
Subsignal("p", Pins("A4")),
Subsignal("n", Pins("A5")),
IOStandard("LVDS")
),
("pcie_x1", 0,
Subsignal("clk_p", Pins("Y11")),
Subsignal("clk_n", Pins("Y12")),
Subsignal("rx_p", Pins("Y5")),
Subsignal("rx_n", Pins("Y6")),
Subsignal("tx_p", Pins("W4")),
Subsignal("tx_n", Pins("W5")),
Subsignal("perst", Pins("A6"), IOStandard("LVCMOS33")),
),
("refclk_en", 0, Pins("C12"), IOStandard("LVCMOS33")),
("refclk_rst_n", 0, Pins("R1"), IOStandard("LVCMOS33")),
("refclk", 0,
Subsignal("p", Pins("Y11")),
Subsignal("n", Pins("Y12")),
),
("refclk", 1,
Subsignal("p", Pins("Y19")),
Subsignal("n", Pins("W20")),
),
("sma_tx", 0,
Subsignal("p", Pins("W8")),
Subsignal("n", Pins("W9")),
),
("sma_rx", 0,
Subsignal("p", Pins("Y7")),
Subsignal("n", Pins("Y8")),
),
]
_ecp5_soc_hat_io = [
("sdram_clock", 0, Pins("E14"), IOStandard("LVCMOS33")),
("sdram", 0,
Subsignal("a", Pins(
"C6 E15 A16 B16 D15 C15 B15 E12",
"D12 B10 C7 A9 C10")),
Subsignal("dq", Pins(
"B19 B12 B9 E6 D6 E7 D7 B11",
"C14 A14 E13 D13 C13 B13 A13 A12")),
Subsignal("we_n", Pins("E9")),
Subsignal("ras_n", Pins("B8")),
Subsignal("cas_n", Pins("D9")),
Subsignal("cs_n", Pins("C8")),
Subsignal("cke", Pins("D11")),
Subsignal("ba", Pins("D8 E8")),
Subsignal("dm", Pins("B6 D14")),
Misc("SLEWRATE=FAST"),
IOStandard("LVCMOS33"),
),
]
# Connectors ---------------------------------------------------------------------------------------
_connectors = [
("X3",
"None", # (no pin 0)
"None", # 1 GND
"None", # 2 N/C
"None", # 3 +2V5
"B19", # 4 EXPCON_IO29
"B12", # 5 EXPCON_IO30
"B9", # 6 EXPCON_IO31
"E6", # 7 EXPCON_IO32
"D6", # 8 EXPCON_IO33
"E7", # 9 EXPCON_IO34
"D7", # 10 EXPCON_IO35
"B11", # 11 EXPCON_IO36
"B6", # 12 EXPCON_IO37
"E9", # 13 EXPCON_IO38
"D9", # 14 EXPCON_IO39
"B8", # 15 EXPCON_IO40
"C8", # 16 EXPCON_IO41
"D8", # 17 EXPCON_IO42
"E8", # 18 EXPCON_IO43
"C7", # 19 EXPCON_IO44
"C6", # 20 EXPCON_IO45
"None", # 21 +5V
"None", # 22 GND
"None", # 23 +2V5
"None", # 24 GND
"None", # 25 +3V3
"None", # 26 GND
"None", # 27 +3V3
"None", # 28 GND
"None", # 29 EXPCON_OSC
"None", # 30 GND
"None", # 31 EXPCON_CLKIN
"None", # 32 GND
"None", # 33 EXPCON_CLKOUT
"None", # 34 GND
"None", # 35 +3V3
"None", # 36 GND
"None", # 37 +3V3
"None", # 38 GND
"None", # 39 +3V3
"None", # 40 GND
),
]
# Platform -----------------------------------------------------------------------------------------
class Platform(LatticePlatform):
default_clk_name = "clk100"
default_clk_period = 1e9/100e6
def __init__(self, **kwargs):
LatticePlatform.__init__(self, "LFE5UM5G-45F-8BG381C", _io, _connectors, **kwargs)
def do_finalize(self, fragment):
try:
self.add_period_constraint(self.lookup_request("eth_clocks", 0).rx, 1e9/125e6)
except ConstraintError:
pass
try:
self.add_period_constraint(self.lookup_request("eth_clocks", 1).rx, 1e9/125e6)
except ConstraintError:
pass
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