litex-boards/litex_boards/platforms/qwertyembedded_beaglewire.py

85 lines
2.8 KiB
Python

#
# This file is part of LiteX-Boards.
# Copyright (c) 2021 Omkar Bhilare <ombhilare999@gmail.com>
# Copyright (c) 2021 Michael Welling <mwelling@ieee.org>
# SPDX-License-Identifier: BSD-2-Clause
from litex.build.generic_platform import *
from litex.build.lattice import LatticePlatform
from litex.build.lattice.programmer import TinyProgProgrammer
# IOs ----------------------------------------------------------------------------------------------
_io = [
# Clk / Rst
("clk100", 0, Pins("61"), IOStandard("LVCMOS33")),
# Leds
("user_led", 0, Pins("28 29 31 32"), IOStandard("LVCMOS33")),
("user_btn_n", 0, Pins( "25"), IOStandard("LVCMOS33")),
# SPIFlash
("spiflash", 0,
Subsignal("cs_n", Pins("71"), IOStandard("LVCMOS33")),
Subsignal("clk", Pins("70"), IOStandard("LVCMOS33")),
Subsignal("mosi", Pins("67"), IOStandard("LVCMOS33")),
Subsignal("miso", Pins("68"), IOStandard("LVCMOS33")),
),
# SDR SDRAM
("sdram_clock", 0, Pins("93"), IOStandard("LVCMOS33")),
("sdram", 0,
Subsignal("a", Pins("118 117 116 101 81 83 90 91 82 84 119 85 87")),
Subsignal("dq", Pins("96 97 98 99 95 80 79 78")),
Subsignal("we_n", Pins("128")),
Subsignal("ras_n", Pins("124")),
Subsignal("cas_n", Pins("125")),
Subsignal("cs_n", Pins("122")),
Subsignal("cke", Pins("88")),
Subsignal("ba", Pins("121 120")),
Subsignal("dm", Pins("94")),
IOStandard("LVCMOS33"),
Misc("SLEWRATE=FAST")
),
]
# Connectors ---------------------------------------------------------------------------------------
_connectors = [
# A2-H2, Pins 1-13
# H9-A6, Pins 14-24
# G1-J2, Pins 25-31
("GPIO", " 37 39 42 44 38 41 43 45"),
("GPIO1", " 47 49 55 60 48 52 56 62"),
("GPIO2", "107 112 114 129 110 113 115 130"),
("GPIO3", " 7 9 15 12 4 8 10 11"),
("grove", " 73 74 75 76 104 102 106 105")
]
# Default peripherals
serial = [
("serial", 0,
Subsignal("tx", Pins("GPIO:0")),
Subsignal("rx", Pins("GPIO:1")),
IOStandard("LVCMOS33")
)
]
# Platform -----------------------------------------------------------------------------------------
class Platform(LatticePlatform):
default_clk_name = "clk100"
default_clk_period = 1e9/100e6
def __init__(self, toolchain="icestorm"):
LatticePlatform.__init__(self, "ice40-hx8k-tq144:4k", _io, _connectors, toolchain=toolchain)
self.add_extension(serial)
def create_programmer(self):
return TinyProgProgrammer()
def do_finalize(self, fragment):
LatticePlatform.do_finalize(self, fragment)
self.add_period_constraint(self.lookup_request("clk100", loose=True), 1e9/100e6)