99 lines
3.1 KiB
Python
99 lines
3.1 KiB
Python
#
|
|
# This file is part of LiteX-Boards.
|
|
#
|
|
# Copyright (c) 2022 Alex Petrov <sysman@sysman.net>
|
|
# SPDX-License-Identifier: BSD-2-Clause
|
|
|
|
from litex.build.generic_platform import *
|
|
from litex.build.xilinx import Xilinx7SeriesPlatform, VivadoProgrammer
|
|
from litex.build.openocd import OpenOCD
|
|
|
|
# IOs ----------------------------------------------------------------------------------------------
|
|
|
|
_io = [
|
|
# Clk / Rst
|
|
("clk100", 0, Pins("G27"), IOStandard("LVCMOS33")),
|
|
("cpu_reset", 0, Pins("W12"), IOStandard("LVCMOS33")),
|
|
|
|
# Leds
|
|
("user_led", 0, Pins("AJ22"), IOStandard("LVCMOS33")), # D3
|
|
("user_led", 1, Pins("AJ21"), IOStandard("LVCMOS33")), # D4
|
|
("user_led", 2, Pins("AK21"), IOStandard("LVCMOS33")), # D5
|
|
("user_led", 3, Pins("AK20"), IOStandard("LVCMOS33")), # D6
|
|
("user_led", 4, Pins("AK19"), IOStandard("LVCMOS33")), # D7
|
|
("user_led", 5, Pins("AJ19"), IOStandard("LVCMOS33")), # D8
|
|
("user_led", 6, Pins("AK18"), IOStandard("LVCMOS33")), # D9
|
|
("user_led", 7, Pins("AJ18"), IOStandard("LVCMOS33")), # D10
|
|
|
|
# Buttons
|
|
("user_btn_k3", 0, Pins("AK15"), IOStandard("LVCMOS33")),
|
|
("user_btn_k2", 0, Pins("AK16"), IOStandard("LVCMOS33")),
|
|
|
|
# Serial (CH340)
|
|
("serial", 0,
|
|
Subsignal("tx", Pins("AK23")),
|
|
Subsignal("rx", Pins("AJ23")),
|
|
IOStandard("LVCMOS33")
|
|
),
|
|
|
|
# SPIFlash (Micron N25Q256A (32MB))
|
|
("spiflash", 0,
|
|
Subsignal("cs_n", Pins("V26"), IOStandard("LVCMOS33")),
|
|
Subsignal("mosi", Pins("R30"), IOStandard("LVCMOS33")),
|
|
Subsignal("miso", Pins("T30"), IOStandard("LVCMOS33")),
|
|
Subsignal("wp", Pins("R28"), IOStandard("LVCMOS33")),
|
|
Subsignal("hold", Pins("T28"), IOStandard("LVCMOS33"))
|
|
),
|
|
("spiflash4x", 0,
|
|
Subsignal("cs_n", Pins("V26"), IOStandard("LVCMOS33")),
|
|
Subsignal("dq", Pins("R30 T30 R28 T28"), IOStandard("LVCMOS33"))
|
|
),
|
|
|
|
]
|
|
|
|
# Connectors ---------------------------------------------------------------------------------------
|
|
|
|
_connectors = [
|
|
# main board connector, pins as marked
|
|
( "main", {
|
|
# usb- 1 2 usb+ not used U3 usb3320 don't use
|
|
# GND 3 4 GND
|
|
# QSPI_CS 5 6 QSPI_D1
|
|
# QSPI_D0 7 8 QSPI_CLK
|
|
9: "B29",
|
|
# 10: "Program_B" key3 reset button
|
|
11: "A28",
|
|
12: "B27",
|
|
13: "A27",
|
|
14: "A26",
|
|
15: "B25",
|
|
16: "A25",
|
|
17: "B24",
|
|
18: "B23",
|
|
19: "A23",
|
|
20: "B22",
|
|
21: "A22",
|
|
22: "A21",
|
|
23: "B20",
|
|
24: "A20",
|
|
# 25,26,27,28: GND
|
|
# 29,30,31,32: V12
|
|
})
|
|
]
|
|
|
|
# Platform -----------------------------------------------------------------------------------------
|
|
|
|
class Platform(Xilinx7SeriesPlatform):
|
|
default_clk_name = "clk100"
|
|
default_clk_period = 1e9/100e6
|
|
|
|
def __init__(self, toolchain="vivado"):
|
|
Xilinx7SeriesPlatform.__init__(self, "xc7k420tl-ffg901", _io, toolchain=toolchain)
|
|
|
|
def create_programmer(self):
|
|
return OpenOCD("openocd_xc7_ft2232.cfg", "bscan_spi_xc7a420t.bit")
|
|
|
|
def do_finalize(self, fragment):
|
|
Xilinx7SeriesPlatform.do_finalize(self, fragment)
|
|
self.add_period_constraint(self.lookup_request("clk100", loose=True), 1e9/100e6)
|