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litex-boards/litex_boards/platforms/mnt_rkx7.py

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Python
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#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2021 Florent Kermarrec <florent@enjoy-digital.fr>
# Copyright (c) 2022 Lukas F. Hartmann, MNT Research GmbH <lukas@mntre.com>
# SPDX-License-Identifier: BSD-2-Clause
from litex.build.generic_platform import *
from litex.build.xilinx import Xilinx7SeriesPlatform
from litex.build.openocd import OpenOCD
# IOs ----------------------------------------------------------------------------------------------
_io = [
# Clk / Rst.
("clk100", 0, Pins("AA10"), IOStandard("LVCMOS15")),
# Serial.
("serial", 0,
Subsignal("tx", Pins("D15")),
Subsignal("rx", Pins("C18")),
IOStandard("LVCMOS33")
),
("serial", 1,
Subsignal("tx", Pins("H16")),
Subsignal("rx", Pins("G16")),
IOStandard("LVCMOS33")
),
("debug_serial", 0,
Subsignal("tx", Pins("C17")),
Subsignal("rx", Pins("C16")),
IOStandard("LVCMOS33")
),
# SPIFlash
("spiflash4x", 0, # clock needs to be accessed through STARTUPE2
Subsignal("cs_n", Pins("C23")),
Subsignal("dq", Pins("B24 A25 B22 A22")),
IOStandard("LVCMOS33")
),
# SDCard.
("spisdcard", 0,
Subsignal("clk", Pins("C11")),
Subsignal("mosi", Pins("A15"), Misc("PULLUP True")),
Subsignal("cs_n", Pins("B15"), Misc("PULLUP True")),
Subsignal("miso", Pins("A14"), Misc("PULLUP True")),
Misc("SLEW=FAST"),
IOStandard("LVCMOS18"),
),
("sdcard", 0,
Subsignal("data", Pins("A14 B10 A12 B15"), Misc("PULLUP True")),
Subsignal("cmd", Pins("A15"), Misc("PULLUP True")),
Subsignal("clk", Pins("C11")),
Subsignal("cd", Pins("A10")),
Misc("SLEW=FAST"),
IOStandard("LVCMOS18"),
),
# RGMII Ethernet
("eth_refclk", 0, Pins("F17"), IOStandard("LVCMOS33")), # CHECKME: Drive it?
("eth_clocks", 0,
Subsignal("tx", Pins("E18")),
Subsignal("rx", Pins("D18")),
IOStandard("LVCMOS33")
),
("eth", 0,
Subsignal("rst_n", Pins("G17"), IOStandard("LVCMOS33")),
Subsignal("int_n", Pins("E16"), IOStandard("LVCMOS33")),
Subsignal("mdio", Pins("E15"), IOStandard("LVCMOS33")),
Subsignal("mdc", Pins("E17"), IOStandard("LVCMOS33")),
Subsignal("rx_ctl", Pins("F15"), IOStandard("LVCMOS33")),
Subsignal("rx_data", Pins("J15 J16 F20 D20"), IOStandard("LVCMOS33")),
Subsignal("tx_ctl", Pins("D19"), IOStandard("LVCMOS33")),
Subsignal("tx_data", Pins("H18 H17 G19 F18"), IOStandard("LVCMOS33")),
),
# I2C
("i2c", 0,
Subsignal("scl", Pins("Y26")),
Subsignal("sda", Pins("W26")),
IOStandard("LVCMOS18"),
),
("i2c", 1,
Subsignal("scl", Pins("G12")),
Subsignal("sda", Pins("A13")),
IOStandard("LVCMOS18"),
),
("i2c", 2,
Subsignal("scl", Pins("H26")),
Subsignal("sda", Pins("G26")),
IOStandard("LVCMOS33"),
),
# GPIO
("resets", 0,
Pins("M21 M22 C13 C14"), # Backlight PWM, Backlight EN, hdmi_rst_n, edp_reset_n
IOStandard("LVCMOS18")
),
("gpio", 0,
Pins("D13 N19 M19"), # USB hub reset, Analogix reset, eDP HPD
IOStandard("LVCMOS18")
),
# DDR3 SDRAM.
("ddram", 0,
Subsignal("a", Pins(
"AC8 AA9 AA7 AD9 Y8 AA8 W11 Y10",
"Y11 Y7 AC11 V11 AB11 V7 V9 V8"),
IOStandard("SSTL15")),
Subsignal("ba", Pins("AC7 AB7 AB9"), IOStandard("SSTL15")),
Subsignal("ras_n", Pins("AF7"), IOStandard("SSTL15")),
Subsignal("cas_n", Pins("AE7"), IOStandard("SSTL15")),
Subsignal("we_n", Pins("AC9"), IOStandard("SSTL15")),
Subsignal("cs_n", Pins("AD8"), IOStandard("SSTL15")),
Subsignal("dm", Pins(
"U6 Y3 AB6 AD4"),
IOStandard("SSTL15")),
Subsignal("dq", Pins(
" V4 W3 U5 U2 U7 U1 V6 V3",
" Y2 Y1 AA3 V2 AC2 W1 AB2 V1",
"AA4 AB4 AC4 AC3 AC6 Y6 Y5 AD6",
"AD1 AE1 AE3 AE2 AE6 AE5 AF3 AF2"
),
IOStandard("SSTL15_T_DCI")),
Subsignal("dqs_p", Pins("W6 AB1 AA5 AF5"),
IOStandard("DIFF_SSTL15")),
Subsignal("dqs_n", Pins("W5 AC1 AB5 AF4"),
IOStandard("DIFF_SSTL15")),
Subsignal("clk_p", Pins("W10"), IOStandard("DIFF_SSTL15")),
Subsignal("clk_n", Pins("W9"), IOStandard("DIFF_SSTL15")),
Subsignal("cke", Pins("AB12"), IOStandard("SSTL15")),
Subsignal("odt", Pins("AC12"), IOStandard("SSTL15")),
Subsignal("reset_n", Pins("AA2"), IOStandard("LVCMOS15")),
Misc("SLEW=FAST"),
Misc("VCCAUX_IO=HIGH")
),
# HDMI (DISP1)
("hdmi", 0,
Subsignal("clk", Pins("C12")),
Subsignal("de", Pins("D10")),
Subsignal("hsync_n", Pins("D11")),
Subsignal("vsync_n", Pins("E11")),
Subsignal("b", Pins("H13 G10 J13 H12 J10 H8 H9 J11")), # [16:23]
Subsignal("g", Pins("F14 C9 G14 F10 H14 G11 H11 G9")), # [8:15]
Subsignal("r", Pins("E10 D8 F9 F8 A9 A8 B9 D9")), # [0:7]
IOStandard("LVCMOS18")
),
# RGB->eDP (DISP2)
("edp", 0,
Subsignal("clk", Pins("AC18")),
Subsignal("de", Pins("AA15")),
Subsignal("hsync", Pins("AB15")), # hsync_n for negative
Subsignal("vsync", Pins("AB16")), # vsync_n for negative
Subsignal("r", Pins("AF14 AF15 AE15 AE16 AF17 AE17 AA14 AF18")), # [16:23]
Subsignal("g", Pins("AD15 AE18 AD16 AF19 AC16 AD14 AC17 AC14")), # [8:15]
Subsignal("b", Pins("AB14 Y15 AA17 AA18 Y16 AF20 AD20 AB17")), # [0:7]
IOStandard("LVCMOS18"), Misc("DRIVE=4"),
),
("edpoff", 0,
Pins("AD18"),
IOStandard("LVCMOS18")
),
# Backlight via Motherboard (unused)
("backlight", 0,
Subsignal("pwm", Pins("K16")),
Subsignal("en", Pins("B16")),
IOStandard("LVCMOS33")
),
# USB
("usb", 0,
Subsignal("dp", Pins("D26")),
Subsignal("dm", Pins("C26")),
IOStandard("LVCMOS33"),
),
("usb_pull", 0,
Pins("F25"),
IOStandard("LVCMOS33")
),
]
# Connectors ---------------------------------------------------------------------------------------
_connectors = []
# Platform -----------------------------------------------------------------------------------------
class Platform(Xilinx7SeriesPlatform):
default_clk_name = "clk100"
default_clk_period = 1e9/100e6
def __init__(self, toolchain="vivado"):
Xilinx7SeriesPlatform.__init__(self, "xc7k325t-ffg676-2", _io, _connectors, toolchain=toolchain)
# Enable bitstream compression, quad SPI and 50MHz rate for quick boot from SPI flash
# see https://github.com/timvideos/litex-buildenv/issues/79
self.toolchain.bitstream_commands = [
"set_property BITSTREAM.GENERAL.COMPRESS True [current_design]",
"set_property BITSTREAM.CONFIG.SPI_BUSWIDTH 4 [current_design]",
"set_property BITSTREAM.CONFIG.CONFIGRATE 50 [current_design]"
]
def create_programmer(self):
return OpenOCD("openocd_xc7_ft2232.cfg", "bscan_spi_xc7a325t.bit")
def do_finalize(self, fragment):
Xilinx7SeriesPlatform.do_finalize(self, fragment)
self.add_period_constraint(self.lookup_request("clk100", loose=True), 1e9/100e6)
self.add_platform_command("set_property INTERNAL_VREF 0.750 [get_iobanks 33]")
self.add_platform_command("set_property INTERNAL_VREF 0.750 [get_iobanks 34]")
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