86 lines
3.1 KiB
Python
86 lines
3.1 KiB
Python
#
|
|
# This file is part of LiteX-Boards.
|
|
#
|
|
# Copyright (c) 2021 Andrew Dennison <andrew@motec.com.au>
|
|
# SPDX-License-Identifier: BSD-2-Clause
|
|
|
|
from litex.build.generic_platform import *
|
|
from litex.build.efinix.platform import EfinixPlatform
|
|
from litex.build.openfpgaloader import OpenFPGALoader
|
|
|
|
# IOs ----------------------------------------------------------------------------------------------
|
|
|
|
_io = [
|
|
# Clk
|
|
("clk33", 0, Pins("C3"), IOStandard("3.3_V_LVTTL_/_LVCMOS")), # net PLL_IN
|
|
|
|
# Buttons
|
|
("user_btn", 0, Pins("C5"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("WEAK_PULLUP")),
|
|
("user_btn", 1, Pins("C9"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("WEAK_PULLUP")),
|
|
|
|
# Leds
|
|
("user_led", 0, Pins("B3"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("DRIVE_STRENGTH=3")),
|
|
("user_led", 1, Pins("J6"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("DRIVE_STRENGTH=3")),
|
|
("user_led", 2, Pins("D7"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("DRIVE_STRENGTH=3")),
|
|
("user_led", 3, Pins("D8"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("DRIVE_STRENGTH=3")),
|
|
|
|
# Serial
|
|
("serial", 0,
|
|
Subsignal("tx", Pins("F3")), # net TXD
|
|
Subsignal("rx", Pins("H2")), # net RXD
|
|
IOStandard("3.3_V_LVTTL_/_LVCMOS")
|
|
),
|
|
|
|
# SPIFlash (W25Q128JVSIM)
|
|
("spiflash", 0,
|
|
Subsignal("cs_n", Pins("J4")), # net SPI_SS
|
|
Subsignal("clk", Pins("H4")), # net SPI_SCLK
|
|
Subsignal("mosi", Pins("F4")), # net SPI_MOSI
|
|
Subsignal("miso", Pins("H3")), # net SPI_MISO
|
|
#Subsignal("wp", Pins("")),
|
|
#Subsignal("hold", Pins("")),
|
|
IOStandard("3.3_V_LVTTL_/_LVCMOS")
|
|
),
|
|
|
|
# SDCard
|
|
("spisdcard", 0,
|
|
# All 4 SPI signals below have 10k pullup on dev board
|
|
Subsignal("clk", Pins("J2")), # net SD_SCLK
|
|
Subsignal("cs_n", Pins("G5")), # net SD_CS
|
|
Subsignal("mosi", Pins("G4")), # net SD_DI
|
|
Subsignal("miso", Pins("J3")), # net SD_DO
|
|
Subsignal("det", Pins("G3")), # net CD2
|
|
Misc("SLEW=FAST"),
|
|
IOStandard("3.3_V_LVTTL_/_LVCMOS")
|
|
),
|
|
]
|
|
|
|
# Connectors ---------------------------------------------------------------------------------------
|
|
|
|
_connectors = [
|
|
# Wacky PMOD pinout misunderstood by others too
|
|
# resulting in this order: GPIOL_12,14,16,19,13,15,17,18
|
|
("pmod", "G1 E2 C2 D3 F1 E1 D2 E3"),
|
|
# GPIOR_020..28, 30..32, 34..36
|
|
("j1", "F8 E7 F7 E6 F6 F5 G9 H9 J9 J8 G8 H8 J7 G6 H6"),
|
|
# GPIOR_19..10, 08..05, 03, 01, 00
|
|
("j2", "E8 D9 D8 D7 C9 B9 D6 C8 B8 A9 A8 C7 C6 B6 A6 B5 A5"),
|
|
]
|
|
|
|
# Platform -----------------------------------------------------------------------------------------
|
|
|
|
class Platform(EfinixPlatform):
|
|
default_clk_name = "clk33"
|
|
default_clk_freq = 33.333e6
|
|
default_clk_period = 1e9/33.333e6
|
|
|
|
def __init__(self, toolchain="efinity"):
|
|
EfinixPlatform.__init__(self, "T8F81C2", _io, _connectors, toolchain=toolchain)
|
|
|
|
def create_programmer(self):
|
|
return OpenFPGALoader("xyloni_spi")
|
|
|
|
def do_finalize(self, fragment):
|
|
EfinixPlatform.do_finalize(self, fragment)
|
|
self.add_period_constraint(self.lookup_request("clk33", loose=True), 1e9/33.333e6)
|