# # This file is part of LiteX-Boards. # # Copyright (c) 2023 Hans Baier # SPDX-License-Identifier: BSD-2-Clause from litex.build.generic_platform import Pins, Subsignal, IOStandard, Misc from litex.build.xilinx import Xilinx7SeriesPlatform from litex.build.openocd import OpenOCD # IOs ---------------------------------------------------------------------------------------------- _io = [ # Clk / Rst ("clk50", 0, Pins("U22"), IOStandard("LVCMOS33")), ("cpu_reset", 0, Pins("P4"), IOStandard("LVCMOS33")), ("prog_b", 0, Pins("AE16"), IOStandard("LVCMOS33")), # The core board does not have a USB serial on it, # so you will have to attach an USB to serial adapter # on these pins ("gpio_serial", 0, Subsignal("tx", Pins("J2:7")), Subsignal("rx", Pins("J2:8")), IOStandard("LVCMOS33") ), # SPIFlash # N25Q064A ("spiflash4x", 0, # clock needs to be accessed through STARTUPE2 Subsignal("cs_n", Pins("P18")), Subsignal("clk", Pins("H13")), Subsignal("dq", Pins("R14 R15 P14 N14")), IOStandard("LVCMOS33") ), # DDR3 SDRAM # MT41K128M16JT-125K ("ddram", 0, Subsignal("a", Pins("E17 G17 F17 C17 G16 D16 H16 E16 H14 F15 F20 H15 C18 G15"), IOStandard("SSTL15")), Subsignal("ba", Pins("B17 D18 A17"), IOStandard("SSTL15")), Subsignal("ras_n", Pins("A19"), IOStandard("SSTL15")), Subsignal("cas_n", Pins("B19"), IOStandard("SSTL15")), Subsignal("we_n", Pins("A18"), IOStandard("SSTL15")), # cs_n is hardwired on the board #Subsignal("cs_n", Pins(""), IOStandard("SSTL15")), Subsignal("dm", Pins("A22 C22"), IOStandard("SSTL15")), Subsignal("dq", Pins( "D21 C21 B22 B21 D19 E20 C19 D20 C23 D23 B24 B25 C24 C26 A25 B26"), IOStandard("SSTL15"), Misc("IN_TERM=UNTUNED_SPLIT_40")), Subsignal("dqs_p", Pins("B20 A23"), IOStandard("DIFF_SSTL15"), Misc("IN_TERM=UNTUNED_SPLIT_40")), Subsignal("dqs_n", Pins("A20 A24"), IOStandard("DIFF_SSTL15"), Misc("IN_TERM=UNTUNED_SPLIT_40")), Subsignal("clk_p", Pins("F18"), IOStandard("DIFF_SSTL15")), Subsignal("clk_n", Pins("F19"), IOStandard("DIFF_SSTL15")), Subsignal("cke", Pins("E18"), IOStandard("SSTL15")), Subsignal("odt", Pins("G19"), IOStandard("SSTL15")), Subsignal("reset_n", Pins("H17"), IOStandard("SSTL15")), Misc("SLEW=FAST"), ), ] # The connectors are named after the daughterboard, not the core board # because on the different core boards the names vary, but on the # daughterboard they stay the same, which we need to connect the # daughterboard peripherals to the core board. # On this board J2 is U2 and J3 is U4 _connectors = [ ("J2", { # odd row even row 7: "D26", 8: "E26", 9: "D25", 10: "E25", 11: "G26", 12: "H26", 13: "E23", 14: "F23", 15: "F22", 16: "G22", 17: "J26", 18: "J25", 19: "G21", 20: "G20", 21: "H22", 22: "H21", 23: "J21", 24: "K21", 25: "K26", 26: "K25", 27: "K23", 28: "K22", 29: "M26", 30: "N26", 31: "L23", 32: "L22", 33: "P26", 34: "R26", 35: "M25", 36: "M24", 37: "N22", 38: "N21", 39: "P24", 40: "P23", 41: "P25", 42: "R25", 43: "T25", 44: "T24", 45: "V21", 46: "U21", 47: "W23", 48: "V23", 49: "Y23", 50: "Y22", 51: "AA25", 52: "Y25", 53: "AC24", 54: "AB24", 55: "Y21", 56: "W21", 57: "Y26", 58: "W25", 59: "AC26", 60: "AB26", }), ("J3", { # odd row even row 7: "B5", 8: "A5", 9: "B4", 10: "A4", 11: "A3", 12: "A2", 13: "D4", 14: "C4", 15: "C2", 16: "B2", 17: "E5", 18: "D5", 19: "C1", 20: "B1", 21: "E1", 22: "D1", 23: "F2", 24: "E2", 25: "G4", 26: "F4", 27: "G2", 28: "G1", 29: "J4", 30: "H4", 31: "H2", 32: "H1", 33: "H9", 34: "G9", 35: "M2", 36: "L2", 37: "L5", 38: "K5", 39: "M4", 40: "L4", 41: "N3", 42: "N2", 43: "M6", 44: "M5", 45: "K1", 46: "J1", 47: "R3", 48: "P3", 49: "T4", 50: "T3", 51: "P6", 52: "P5", 53: "N1", 54: "M1", 55: "R1", 56: "P1", 57: "T2", 58: "R2", 59: "U2", 60: "U1", }) ] # Platform ----------------------------------------------------------------------------------------- class Platform(Xilinx7SeriesPlatform): default_clk_name = "clk50" default_clk_period = 1e9/50e6 kgates = None def __init__(self, kgates=100, toolchain="vivado", with_daughterboard=False, with_rp2040_daughterboard=False): assert(kgates in [75, 100, 200], "kgates can only be 75, 100 or 200, representing a XC7A75T, XC7TA100T, XC7A200T") self.kgates = kgates device = "xc7a200tfbg676-2" if kgates == 200 else f"xc7a{kgates}tfgg676-2" io = _io connectors = _connectors core_leds_name = "onboard_led" if with_daughterboard else "user_led" io += [ (core_leds_name, 0, Pins("T23"), IOStandard("LVCMOS33")), (core_leds_name, 1, Pins("R23"), IOStandard("LVCMOS33")), ] if with_daughterboard: from litex_boards.platforms.qmtech_daughterboard import QMTechDaughterboard daughterboard = QMTechDaughterboard(IOStandard("LVCMOS33")) io += daughterboard.io connectors += daughterboard.connectors if with_rp2040_daughterboard: from litex_boards.platforms.qmtech_rp2040_daughterboard import QMTechDaughterboard daughterboard = QMTechDaughterboard(IOStandard("LVCMOS33")) io += daughterboard.io connectors += daughterboard.connectors Xilinx7SeriesPlatform.__init__(self, device, io, connectors, toolchain=toolchain) self.toolchain.bitstream_commands = \ ["set_property BITSTREAM.CONFIG.SPI_BUSWIDTH 4 [current_design]", "set_property BITSTREAM.GENERAL.COMPRESS TRUE [current_design]"] self.toolchain.additional_commands = \ ["write_cfgmem -force -format bin -interface spix4 -size 16 " "-loadbit \"up 0x0 {build_name}.bit\" -file {build_name}.bin"] self.add_platform_command("set_property INTERNAL_VREF 0.750 [get_iobanks 16]") self.add_platform_command("set_property CFGBVS VCCO [current_design]") self.add_platform_command("set_property CONFIG_VOLTAGE 3.3 [current_design]") def create_programmer(self): bscan_spi = f"bscan_spi_xc7a{self.kgates}t.bit" return OpenOCD("openocd_xc7_ft2232.cfg", bscan_spi) def do_finalize(self, fragment): Xilinx7SeriesPlatform.do_finalize(self, fragment) self.add_period_constraint(self.lookup_request("clk50", loose=True), 1e9/50e6)