litex-boards/litex_boards/platforms/trenz_tec0117.py

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#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2020 Pepijn de Vos <pepijndevos@gmail.com>
# Copyright (c) 2021 Florent Kermarrec <florent@enjoy-digital.fr>
# SPDX-License-Identifier: BSD-2-Clause
from migen import *
from litex.build.generic_platform import *
from litex.build.gowin.platform import GowinPlatform
from litex.build.openfpgaloader import OpenFPGALoader
# IOs ----------------------------------------------------------------------------------------------
_io = [
# Clk / Rst
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("clk12", 0, Pins("35"), IOStandard("LVCMOS33")),
("clk100", 0, Pins("63"), IOStandard("LVCMOS33")),
("rst_n", 0, Pins("77"), IOStandard("LVCMOS33")),
# Leds
("user_led", 0, Pins("86"), IOStandard("LVCMOS33")),
("user_led", 1, Pins("85"), IOStandard("LVCMOS33")),
("user_led", 2, Pins("84"), IOStandard("LVCMOS33")),
("user_led", 3, Pins("83"), IOStandard("LVCMOS33")),
("user_led", 4, Pins("82"), IOStandard("LVCMOS33")),
("user_led", 5, Pins("81"), IOStandard("LVCMOS33")),
("user_led", 6, Pins("80"), IOStandard("LVCMOS33")),
("user_led", 7, Pins("79"), IOStandard("LVCMOS33")),
# Serial
("serial", 0,
Subsignal("tx", Pins("15"), IOStandard("LVCMOS33")),
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Subsignal("rx", Pins("16"), IOStandard("LVCMOS33")),
),
# SPIFlash
("spiflash", 0,
Subsignal("cs_n", Pins("51"), IOStandard("LVCMOS33")),
Subsignal("clk", Pins("49"), IOStandard("LVCMOS33")),
Subsignal("miso", Pins("53"), IOStandard("LVCMOS33")),
Subsignal("mosi", Pins("48"), IOStandard("LVCMOS33")),
Subsignal("wp", Pins("54"), IOStandard("LVCMOS33")),
Subsignal("hold", Pins("50"), IOStandard("LVCMOS33")),
),
("spiflash4x", 0,
Subsignal("cs_n", Pins("51")),
Subsignal("clk", Pins("49")),
Subsignal("dq", Pins("48 53 54 50")),
IOStandard("LVCMOS33")
),
# SPIFlash (FTDI Chip)
("spiflash", 1,
Subsignal("cs_n", Pins("13"), IOStandard("LVCMOS33")),
Subsignal("clk", Pins("16"), IOStandard("LVCMOS33")),
Subsignal("miso", Pins("14"), IOStandard("LVCMOS33")),
Subsignal("mosi", Pins("15"), IOStandard("LVCMOS33")),
),
# SDRAM (embedded in SIP, requires specific IO naming)
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("O_sdram_clk", 0, Pins(1), IOStandard("LVCMOS33")),
("O_sdram_cke", 0, Pins(1), IOStandard("LVCMOS33")),
("O_sdram_cs_n", 0, Pins(1), IOStandard("LVCMOS33")),
("O_sdram_cas_n", 0, Pins(1), IOStandard("LVCMOS33")),
("O_sdram_ras_n", 0, Pins(1), IOStandard("LVCMOS33")),
("O_sdram_wen_n", 0, Pins(1), IOStandard("LVCMOS33")),
("O_sdram_dqm", 0, Pins(2), IOStandard("LVCMOS33")),
("O_sdram_addr", 0, Pins(12), IOStandard("LVCMOS33")),
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("O_sdram_ba", 0, Pins(2), IOStandard("LVCMOS33")),
("IO_sdram_dq", 0, Pins(16), IOStandard("LVCMOS33")),
]
# Connectors ---------------------------------------------------------------------------------------
_connectors = [
("pmod", "47 41 38 40 36 42 39 37"),
]
# PMODs --------------------------------------------------------------------------------------------
def sdcard_pmod_io(pmod):
return [
# SDCard PMOD:
# - https://store.digilentinc.com/pmod-microsd-microsd-card-slot/
# - https://github.com/antmicro/arty-expansion-board
("spisdcard", 0,
Subsignal("clk", Pins(f"{pmod}:3")),
Subsignal("mosi", Pins(f"{pmod}:1"), Misc("PULL_MODE=UP")),
Subsignal("cs_n", Pins(f"{pmod}:0"), Misc("PULL_MODE=UP")),
Subsignal("miso", Pins(f"{pmod}:2"), Misc("PULL_MODE=UP")),
IOStandard("LVCMOS33"),
),
("sdcard", 0,
Subsignal("data", Pins(f"{pmod}:2 {pmod}:4 {pmod}:5 {pmod}:0"), Misc("PULL_MODE=UP")),
Subsignal("cmd", Pins(f"{pmod}:1"), Misc("PULL_MODE=UP")),
Subsignal("clk", Pins(f"{pmod}:3")),
Subsignal("cd", Pins(f"{pmod}:6")),
IOStandard("LVCMOS33"),
),
]
_sdcard_pmod_io = sdcard_pmod_io("pmod")
# Platform -----------------------------------------------------------------------------------------
class Platform(GowinPlatform):
default_clk_name = "clk12"
default_clk_period = 1e9/12e6
def __init__(self):
GowinPlatform.__init__(self, "GW1NR-LV9QN88C6/I5", _io, _connectors, toolchain="gowin", devicename='GW1NR-9')
def create_programmer(self):
return OpenFPGALoader("littlebee")
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def do_finalize(self, fragment):
GowinPlatform.do_finalize(self, fragment)
self.add_period_constraint(self.lookup_request("clk12", loose=True), 1e9/12e6)
self.add_period_constraint(self.lookup_request("clk100", loose=True), 1e9/100e6)