# # This file is part of LiteX-Boards. # # Copyright (c) 2022 Icenowy Zheng # Copyright (c) 2022 Florent Kermarrec # 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.gowin.programmer import GowinProgrammer from litex.build.openfpgaloader import OpenFPGALoader # IOs ---------------------------------------------------------------------------------------------- _io = [ # Clk / Rst ("clk27", 0, Pins("H11"), IOStandard("LVCMOS33")), # Serial ("serial", 0, Subsignal("rx", Pins("T13")), Subsignal("tx", Pins("M11")), IOStandard("LVCMOS33") ), # SPIFlash ("spiflash", 0, Subsignal("cs_n", Pins("M9"), IOStandard("LVCMOS33")), Subsignal("clk", Pins("L10"), IOStandard("LVCMOS33")), Subsignal("miso", Pins("P10"), IOStandard("LVCMOS33")), Subsignal("mosi", Pins("R10"), IOStandard("LVCMOS33")), ), # SDCard ("spisdcard", 0, Subsignal("clk", Pins("N10")), Subsignal("mosi", Pins("R14")), Subsignal("cs_n", Pins("N11")), Subsignal("miso", Pins("M8")), IOStandard("LVCMOS33"), ), ("sdcard", 0, Subsignal("data", Pins("M8 M7 M10 N11")), Subsignal("cmd", Pins("R14")), Subsignal("clk", Pins("N10")), Subsignal("cd", Pins("D15")), IOStandard("LVCMOS33"), ), ] # Dock 204 Pins SODIMM Connector ------------------------------------------------------------------- _connectors = [ ["CARD1", # A. # ------------------------------------------------- "---", # 0 # GND GND 5V 5V 5V 5V GND GND NC ( 1-10). " T13 --- --- --- --- --- --- --- --- ---", # NC GND GND NC NC NC GND GND (11-20). " M11 --- --- --- T10 --- --- --- --- ---", # NC 3V3 NC 3V3 GND GND (21-30). " --- --- --- --- --- --- T6 R16 P6 P15", # GND GND GND GND (31-40). " --- --- T7 P16 R8 N15 --- --- T8 N16", # GND GND (41-50). " M6 N14 GND L16 T9 L14 P9 --- --- K15", # GND GND GND (51-60). " P11 K14 T11 --- --- K16 R11 J15 T12 ---", # GND GND (61-70). " --- H16 R12 H14 P13 --- R13 G16 T14 H15", # GND GND (71-72). " --- ---", # B. # ------------------------------------------------- # NC (73-82). " M15 L13 M14 K11 F13 K12 G12 K13 T15 ---", # NC NC (83-92). " J16 H13 J14 J12 --- --- G14 H12 G15 G11", # NC NC NC NC E15 NC (93-102). " --- --- F14 B10 F16 A13 --- --- --- ---", # NC NC NC NC NC NC NC (103-112). " D15 --- --- --- A15 --- B14 --- --- ---", # NC NC NC NC NC NC (113-122). " A14 --- B13 --- --- --- C12 --- B12 ---", # NC NC GND GND (123-132). " A12 --- C11 --- --- --- B11 E15 A11 F15", # GND GND NC GND GND NC (133-142). " --- --- C10 C13 --- --- --- D16 --- E14", # GND GND GND GND (143-152). " B8 --- --- C9 C6 A9 A7 --- --- L12", # GND GBD GND GND (153-162). " A6 J11 --- --- C7 E9 D7 E8 --- ---", # VCC VCC GND GND VCC GND (163-172). " T2 --- T3 --- --- --- T4 --- T5 ---", # GND VCC GND GND (173-182). " --- --- N6 F10 N7 --- --- D11 N9 D10", # GND GND NC NC GND GND (183-192). " R9 --- --- E10 --- --- --- --- N8 R7", # GND GND NC NC NC NC (193-202). " L9 P7 --- --- --- M6 --- L8 --- ---", # NC NC (203-204). " --- ---", ], ] # Dock IOs ----------------------------------------------------------------------------------------- _dock_io = [ # Leds ("user_led", 0, Pins( "CARD1:44"), IOStandard("LVCMOS18")), ("user_led", 1, Pins( "CARD1:46"), IOStandard("LVCMOS18")), ("user_led", 3, Pins( "CARD1:40"), IOStandard("LVCMOS18")), ("user_led", 2, Pins( "CARD1:42"), IOStandard("LVCMOS18")), ("user_led", 4, Pins( "CARD1:98"), IOStandard("LVCMOS18")), ("user_led", 5, Pins("CARD1:136"), IOStandard("LVCMOS18")), # HDMI ("hdmi", 0, Subsignal("clk_p", Pins("CARD1:132")), Subsignal("clk_n", Pins("CARD1:130")), Subsignal("data0_p", Pins("CARD1:50")), # Inverted. Subsignal("data0_n", Pins("CARD1:52")), Subsignal("data1_p", Pins("CARD1:62")), # Inverted. Subsignal("data1_n", Pins("CARD1:64")), Subsignal("data2_p", Pins("CARD1:68")), # Inverted. Subsignal("data2_n", Pins("CARD1:70")), Subsignal("hdp", Pins("CARD1:154"), IOStandard("LVCMOS18")), Subsignal("cec", Pins("CARD1:152"), IOStandard("LVCMOS18")), Subsignal("sda", Pins("CARD1:95"), IOStandard("LVCMOS18")), Subsignal("scl", Pins("CARD1:97"), IOStandard("LVCMOS18")), Misc("PULL_MODE=NONE"), ), # RMII Ethernet ("eth_clocks", 0, Subsignal("ref_clk", Pins("CARD1:148")), IOStandard("LVCMOS18"), ), ("eth", 0, Subsignal("rst_n", Pins("CARD1:176")), Subsignal("rx_data", Pins("CARD1:56 CARD1:146")), Subsignal("crs_dv", Pins("CARD1:41")), Subsignal("tx_en", Pins("CARD1:83")), Subsignal("tx_data", Pins("CARD1:140 CARD1:142")), Subsignal("mdc", Pins("CARD1:95")), Subsignal("mdio", Pins("CARD1:97")), Subsignal("rx_er", Pins("CARD1:200")), #Subsignal("int_n", Pins("CARD1:")), IOStandard("LVCMOS18") ), ] # Platform ----------------------------------------------------------------------------------------- class Platform(GowinPlatform): default_clk_name = "clk27" default_clk_period = 1e9/27e6 def __init__(self, toolchain="gowin"): GowinPlatform.__init__(self, "GW2A-LV18PG256C8/I7", _io, _connectors, toolchain=toolchain, devicename="GW2A-18C") self.add_extension(_dock_io) self.toolchain.options["use_mspi_as_gpio"] = 1 self.toolchain.options["use_sspi_as_gpio"] = 1 self.toolchain.options["use_ready_as_gpio"] = 1 self.toolchain.options["use_done_as_gpio"] = 1 def create_programmer(self, kit="openfpgaloader"): return OpenFPGALoader(cable="ft2232") def do_finalize(self, fragment): GowinPlatform.do_finalize(self, fragment) self.add_period_constraint(self.lookup_request("clk27", loose=True), 1e9/27e6)