67 lines
2.7 KiB
Python
67 lines
2.7 KiB
Python
#
|
|
# This file is part of LiteX-Boards.
|
|
#
|
|
# Copyright (c) 2021 Andrew Dennison <andrew@motec.com.au>
|
|
# Copyright (c) 2022 Charles-Henri Mousset <ch.mousset@gmail.com>
|
|
# SPDX-License-Identifier: BSD-2-Clause
|
|
|
|
import os
|
|
from litex.build.generic_platform import *
|
|
from litex.build.efinix.platform import EfinixPlatform
|
|
from litex.build.efinix.programmer import EfinixAtmelProgrammer
|
|
|
|
# IOs ----------------------------------------------------------------------------------------------
|
|
|
|
_io = [
|
|
# Clk
|
|
("clk33", 0, Pins("C3"), IOStandard("3.3_V_LVTTL_/_LVCMOS")), # net PLL_IN
|
|
|
|
# Buttons
|
|
("user_btn", 0, Pins("G1"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("WEAK_PULLUP")),
|
|
("user_btn", 1, Pins("F1"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("WEAK_PULLUP")),
|
|
|
|
# Leds
|
|
("user_led", 0, Pins("G4"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("DRIVE_STRENGTH=3")),
|
|
("user_led", 1, Pins("J2"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("DRIVE_STRENGTH=3")),
|
|
("user_led", 2, Pins("C2"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("DRIVE_STRENGTH=3")),
|
|
("user_led", 3, Pins("E3"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("DRIVE_STRENGTH=3")),
|
|
("user_led", 4, Pins("B3"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("DRIVE_STRENGTH=3")),
|
|
|
|
# SPIFlash (W25Q80DV)
|
|
("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")
|
|
),
|
|
]
|
|
|
|
# Connectors ---------------------------------------------------------------------------------------
|
|
|
|
_connectors = [
|
|
# use "j3:1" reference for pin 1 of J3. This makes it a 1:1 translation with connector numbering
|
|
("j3", "ZERO #N/A #N/A G5 F1 G4 E1 J3 C2 G3 D2 J2 E3 H2 D3 F3 C3 G1 B3 #N/A #N/A A2 A2"),
|
|
("j4", "ZERO #N/A #N/A A5 B8 B5 C8 C5 D6 A6 B9 B6 C9 C6 D7 C7 D8 A8 D9 A9 E8 A2 A2"),
|
|
("j5", "ZERO #N/A #N/A F8 J9 E7 J8 F7 G8 E6 H8 F6 J7 F5 G6 G9 H6 H9 J6 #N/A #N/A A2 A2"),
|
|
]
|
|
|
|
# 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 EfinixAtmelProgrammer()
|
|
|
|
def do_finalize(self, fragment):
|
|
EfinixPlatform.do_finalize(self, fragment)
|
|
self.add_period_constraint(self.lookup_request("clk33", loose=True), 1e9/33.333e6)
|