79 lines
2.5 KiB
Python
79 lines
2.5 KiB
Python
|
#
|
||
|
|
# This file is part of LiteX-Boards.
|
||
|
|
#
|
||
|
|
# Copyright (c) 2023 Nimalan M <nimalan.m@protonmail.com>
|
||
|
|
# SPDX-License-Identifier: BSD-2-Clause
|
||
|
|
|
||
|
|
# The Alchitry Cu is FPGA Development board
|
||
|
|
# by SparkFun - https://www.sparkfun.com/products/16526.
|
||
|
|
#
|
||
|
|
# It has a Lattice ICE40HX8K-CB132IC and can be programmed
|
||
|
|
# with the Icestorm toolchain
|
||
|
|
# Schematic - https://cdn.sparkfun.com/assets/2/6/e/5/e/alchitry_cu_sch_update.pdf
|
||
|
|
|
||
|
|
from litex.build.generic_platform import *
|
||
|
|
from litex.build.lattice import LatticeiCE40Platform
|
||
|
|
from litex.build.lattice.programmer import IceStormProgrammer
|
||
|
|
|
||
|
|
# IOs ----------------------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
_io = [
|
||
|
|
# Clk / Rst
|
||
|
|
("clk100", 0, Pins("P7"), IOStandard("LVCMOS33")),
|
||
|
|
("cpu_reset", 0, Pins("P8"), IOStandard("LVCMOS33")),
|
||
|
|
|
||
|
|
# Leds
|
||
|
|
("user_led", 0, Pins("J11"), IOStandard("LVCMOS33")),
|
||
|
|
("user_led", 1, Pins("K11"), IOStandard("LVCMOS33")),
|
||
|
|
("user_led", 2, Pins("K12"), IOStandard("LVCMOS33")),
|
||
|
|
("user_led", 3, Pins("K14"), IOStandard("LVCMOS33")),
|
||
|
|
("user_led", 4, Pins("L12"), IOStandard("LVCMOS33")),
|
||
|
|
("user_led", 5, Pins("L14"), IOStandard("LVCMOS33")),
|
||
|
|
("user_led", 6, Pins("M12"), IOStandard("LVCMOS33")),
|
||
|
|
("user_led", 7, Pins("N14"), IOStandard("LVCMOS33")),
|
||
|
|
|
||
|
|
# Serial
|
||
|
|
("serial", 0,
|
||
|
|
Subsignal("tx", Pins("P14")),
|
||
|
|
Subsignal("rx", Pins("M9")),
|
||
|
|
IOStandard("LVCMOS33")
|
||
|
|
),
|
||
|
|
|
||
|
|
# Onboard QWIIC
|
||
|
|
("i2c", 0,
|
||
|
|
Subsignal("scl", Pins("A4")),
|
||
|
|
Subsignal("sda", Pins("A3")),
|
||
|
|
IOStandard("LVCMOS33"),
|
||
|
|
),
|
||
|
|
|
||
|
|
# SPIFlash X25XXSMD1
|
||
|
|
("spiflash", 0,
|
||
|
|
Subsignal("mosi", Pins("M11")),
|
||
|
|
Subsignal("miso", Pins("P11")),
|
||
|
|
Subsignal("sck", Pins("P12")),
|
||
|
|
Subsignal("ss", Pins("P13")),
|
||
|
|
IOStandard("LVCMOS33")
|
||
|
|
),
|
||
|
|
]
|
||
|
|
|
||
|
|
# Connectors ---------------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
_connectors = []
|
||
|
|
|
||
|
|
# Platform -----------------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
class Platform(LatticeiCE40Platform):
|
||
|
|
default_clk_name = "clk100"
|
||
|
|
default_clk_period = 1e9/100e6
|
||
|
|
|
||
|
|
def __init__(self, toolchain="icestorm", **kwargs):
|
||
|
|
LatticeiCE40Platform.__init__(self, "ice40-hx8k-cb132", _io, _connectors, toolchain=toolchain)
|
||
|
|
|
||
|
|
def create_programmer(self):
|
||
|
|
return IceStormProgrammer()
|
||
|
|
|
||
|
|
def do_finalize(self, fragment):
|
||
|
|
LatticeiCE40Platform.do_finalize(self, fragment)
|
||
|
|
self.add_period_constraint(self.lookup_request("clk100", loose=True), 1e9/100e6)
|
||
|
|
|