163 lines
5.6 KiB
Python
163 lines
5.6 KiB
Python
#
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# This file is part of LiteX-Boards.
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#
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# Copyright (c) 2019 Arnaud Durand <arnaud.durand@unifr.ch>
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# SPDX-License-Identifier: BSD-2-Clause
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from litex.build.generic_platform import *
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from litex.build.lattice import LatticePlatform
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from litex.build.lattice.programmer import OpenOCDJTAGProgrammer
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import os
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# IOs ----------------------------------------------------------------------------------------------
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_io = [
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# Clk / Rst
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("clk12", 0, Pins("A10"), IOStandard("LVCMOS33")),
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("clk200", 0,
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Subsignal("p", Pins("Y19")),
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Subsignal("n", Pins("W20")),
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IOStandard("LVDS")
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),
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("ext_clk50", 0, Pins("B11"), IOStandard("LVCMOS33")),
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("ext_clk50_en", 0, Pins("C11"), IOStandard("LVCMOS33")),
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("rst_n", 0, Pins("G2"), IOStandard("LVCMOS33")),
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# Leds
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("user_led", 0, Pins("A13"), IOStandard("LVCMOS25")),
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("user_led", 1, Pins("A12"), IOStandard("LVCMOS25")),
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("user_led", 2, Pins("B19"), IOStandard("LVCMOS25")),
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("user_led", 3, Pins("A18"), IOStandard("LVCMOS25")),
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("user_led", 4, Pins("B18"), IOStandard("LVCMOS25")),
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("user_led", 5, Pins("C17"), IOStandard("LVCMOS25")),
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("user_led", 6, Pins("A17"), IOStandard("LVCMOS25")),
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("user_led", 7, Pins("B17"), IOStandard("LVCMOS25")),
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# Buttons
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("user_dip_btn", 1, Pins("J1"), IOStandard("LVCMOS33")),
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("user_dip_btn", 2, Pins("H1"), IOStandard("LVCMOS33")),
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("user_dip_btn", 3, Pins("K1"), IOStandard("LVCMOS33")),
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("user_dip_btn", 4, Pins("E15"), IOStandard("LVCMOS25")),
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("user_dip_btn", 5, Pins("D16"), IOStandard("LVCMOS25")),
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("user_dip_btn", 6, Pins("B16"), IOStandard("LVCMOS25")),
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("user_dip_btn", 7, Pins("C16"), IOStandard("LVCMOS25")),
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("user_dip_btn", 8, Pins("A16"), IOStandard("LVCMOS25")),
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("button_1", 0, Pins("P4"), IOStandard("LVCMOS25")),
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# Serial
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("serial", 0,
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Subsignal("rx", Pins("P2"), IOStandard("LVCMOS33")),
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Subsignal("tx", Pins("P3"), 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("R2"), IOStandard("LVCMOS33")),
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Subsignal("mosi", Pins("W2"), IOStandard("LVCMOS33")),
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Subsignal("miso", Pins("V2"), IOStandard("LVCMOS33")),
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Subsignal("wp", Pins("Y2"), IOStandard("LVCMOS33")),
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Subsignal("hold", Pins("W1"), IOStandard("LVCMOS33")),
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),
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("spiflash4x", 0,
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Subsignal("cs_n", Pins("R2"), IOStandard("LVCMOS33")),
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Subsignal("dq", Pins("W2 V2 Y2 W1"), IOStandard("LVCMOS33")),
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),
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]
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# Connectors ---------------------------------------------------------------------------------------
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_connectors = [
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("RASP",
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"None", # (no pin 0)
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"None", # 1 3.3V
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"None", # 2 5V
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"T17", # 3 RASP_IO02
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"None", # 4 5V
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"U16", # 5 RASP_IO03
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"None", # 6 GND
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"U17", # 7 RASP_IO04
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"P18", # 8 RASP_IO14
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"None", # 9 GND
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"N20", # 10 RASP_IO15
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"N19", # 11 RASP_IO17
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"T16", # 12 RASP_IO18
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"M18", # 13 RASP_IO27
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"None", # 14 GND
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"N17", # 15 RASP_IO22
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"P17", # 16 RASP_IO23
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"None", # 17 3.3V
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"M17", # 18 RASP_IO24
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"U20", # 19 RASP_IO10
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"None", # 20 GND
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"T19", # 21 RASP_IO09
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"N18", # 22 RASP_IO25
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"R20", # 23 RASP_IO11
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"U19", # 24 RASP_IO08
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"None", # 25 GND
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"R18", # 26 RASP_IO07
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"L18", # 27 RASP_ID_SD
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"L17", # 28 RASP_ID_SC
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"U18", # 29 RASP_IO05
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"None", # 30 GND
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"T18", # 31 RASP_IO06
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"T20", # 32 RASP_IO12
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"P20", # 33 RASP_IO13
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"None", # 34 GND
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"R17", # 35 RASP_IO19
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"P19", # 36 RASP_IO16
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"N16", # 37 RASP_IO26
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"P16", # 38 RASP_IO20
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"None", # 39 GND
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"R16", # 40 RASP_IO21
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),
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("PMOD",
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"None", # (no pin 0)
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"C6", # 1
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"C7", # 2
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"E8", # 3
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"D8", # 4
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"None", # 5 GND
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"None", # 6 VCCIO0
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"C8", # 7 EXPCON_IO32
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"B8", # 8 EXPCON_IO33
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"A7", # 9 EXPCON_IO34
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"A8", # 10 EXPCON_IO35
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"None", # 11 GND
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"None", # 12 VCCIO0
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),
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]
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# Platform -----------------------------------------------------------------------------------------
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class Platform(LatticePlatform):
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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="trellis", **kwargs):
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LatticePlatform.__init__(self, "LFE5UM5G-85F-8BG381", _io, _connectors, toolchain=toolchain, **kwargs)
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def request(self, *args, **kwargs):
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import time
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if "serial" in args:
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msg = "FT2232H will be used as serial, make sure that:\n"
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msg += " -the hardware has been modified: R22 and R23 should be removed, two 0 Ω resistors shoud be populated on R34 and R35.\n"
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msg += " -the chip is configured as UART with virtual COM on port B (With FTProg or https://github.com/trabucayre/fixFT2232_ecp5evn)."
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print(msg)
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time.sleep(2)
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if "ext_clk50" in args:
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print("An oscillator must be populated on X5.")
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time.sleep(2)
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return LatticePlatform.request(self, *args, **kwargs)
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def create_programmer(self):
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return OpenOCDJTAGProgrammer("openocd_evn_ecp5.cfg")
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def do_finalize(self, fragment):
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LatticePlatform.do_finalize(self, fragment)
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self.add_period_constraint(self.lookup_request("clk12", loose=True), 1e9/12e6)
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self.add_period_constraint(self.lookup_request("clk200", loose=True), 1e9/200e6)
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