Hardware
/
litex-boards
mirror of https://github.com/litex-hub/litex-boards.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
litex-boards/litex_boards/platforms/lattice_versa_ecp5.py

249 lines
8.4 KiB
Python
Raw Permalink Blame History

#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2017 Sergiusz Bazanski <q3k@q3k.org>
# Copyright (c) 2018-2019 Florent Kermarrec <florent@enjoy-digital.fr>
# SPDX-License-Identifier: BSD-2-Clause
from litex.build.generic_platform import *
from litex.build.lattice import LatticeECP5Platform
from litex.build.lattice.programmer import OpenOCDJTAGProgrammer
# IOs ----------------------------------------------------------------------------------------------
_io = [
# Clk / Rst
("clk100", 0, Pins("P3"), IOStandard("LVDS")),
("rst_n", 0, Pins("T1"), IOStandard("LVCMOS33")),
# Leds
("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")),
# Switches
("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
("serial", 0,
Subsignal("rx", Pins("C11"), IOStandard("LVCMOS33")),
Subsignal("tx", Pins("A11"), IOStandard("LVCMOS33")),
),
# SPIFlash
("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")
),
# DDR3 SDRAM
("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"),
),
# RGMII Ethernet
("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")
),
# PCIe
("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")),
),
# External Clock
("ext_clk", 0,
Subsignal("p", Pins("A4")),
Subsignal("n", Pins("A5")),
IOStandard("LVDS")
),
# Ref Clock
("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
("sma_tx", 0,
Subsignal("p", Pins("W8")),
Subsignal("n", Pins("W9")),
),
("sma_rx", 0,
Subsignal("p", Pins("Y7")),
Subsignal("n", Pins("Y8")),
),
]
# ECP5-hat extension (https://github.com/daveshah1/ecp5-hat) ---------------------------------------
_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(LatticeECP5Platform):
default_clk_name = "clk100"
default_clk_period = 1e9/100e6
def __init__(self, device="LFE5UM5G", toolchain="trellis", **kwargs):
assert device in ["LFE5UM5G", "LFE5UM"]
LatticeECP5Platform.__init__(self, device + "-45F-8BG381C", _io, _connectors, toolchain=toolchain, **kwargs)
def create_programmer(self):
return OpenOCDJTAGProgrammer("openocd_versa_ecp5.cfg")
def do_finalize(self, fragment):
self.add_period_constraint(self.lookup_request("clk100", loose=True), 1e9/100e6)
self.add_period_constraint(self.lookup_request("eth_clocks:rx", 0, loose=True), 1e9/125e6)
self.add_period_constraint(self.lookup_request("eth_clocks:rx", 1, loose=True), 1e9/125e6)
Reference in New Issue View Git Blame Copy Permalink