74 lines
2.6 KiB
Python
74 lines
2.6 KiB
Python
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#
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# This file is part of LiteX-Boards.
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# Copyright (c) 2024, Signaloid <developer-support@signaloid.com>
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# SPDX-License-Identifier: BSD-2-Clause
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# Signaloid C0-microSD FPGA SoM:
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# - Documentation: https://c0-microsd-docs.signaloid.io/
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# - GitHub HomePage: https://github.com/signaloid/C0-microSD-Hardware
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from litex.build.generic_platform import IOStandard, Misc, Pins, Subsignal
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from litex.build.lattice import LatticeiCE40Platform
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# IOs ----------------------------------------------------------------------------------------------
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_io = [
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# Clk / Rst
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("clk12", 0, Pins("B3"), IOStandard("LVCMOS33")),
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# Leds
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("user_led", 0, Pins("B5"), IOStandard("LVCMOS33")), # Red
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("user_led", 1, Pins("A5"), IOStandard("LVCMOS33")), # Green
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# Serial
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("serial", 0,
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Subsignal("rx", Pins("B3")),
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Subsignal("tx", Pins("A4"), Misc("PULLUP")),
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IOStandard("LVCMOS33")
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),
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# SPIFlash
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("spiflash", 0,
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Subsignal("cs_n", Pins("C1")),
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Subsignal("clk", Pins("D1")),
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Subsignal("mosi", Pins("F1")),
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Subsignal("miso", Pins("E1")),
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IOStandard("LVCMOS18"),
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),
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# SD Breakout pins
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("SD_DAT0", 0, Pins("A1"), IOStandard("LVCMOS33")),
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("SD_DAT1", 0, Pins("A2"), IOStandard("LVCMOS33")),
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("SD_DAT2", 0, Pins("E5"), IOStandard("LVCMOS33")),
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("SD_DAT3", 0, Pins("F5"), IOStandard("LVCMOS33")),
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("SD_CMD", 0, Pins("A4"), IOStandard("LVCMOS33")),
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("SD_CLK", 0, Pins("B3"), IOStandard("LVCMOS33")),
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]
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# Connectors ---------------------------------------------------------------------------------------
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_connectors = []
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# Platform -----------------------------------------------------------------------------------------
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class Platform(LatticeiCE40Platform):
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default_clk_name = "clk12"
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default_clk_period = 1e9/12e6
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def __init__(self, toolchain="icestorm"):
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LatticeiCE40Platform.__init__(self, "ice40-up5k-uwg30", _io, _connectors, toolchain=toolchain)
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def create_programmer(self):
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print("\033[93m")
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print("-------------------------------------------------------------------------------")
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print("Programming is not supported for this platform.")
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print("Please use the official Signaloid C0-microSD utilities for flashing the device.")
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print("https://github.com/signaloid/C0-microSD-utilities")
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print("-------------------------------------------------------------------------------")
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print("\033[0m")
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return None
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def do_finalize(self, fragment):
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LatticeiCE40Platform.do_finalize(self, fragment)
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self.add_period_constraint(self.lookup_request("clk12", loose=True), 1e9/12e6)
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