# # This file is part of LiteX-Boards. # # Copyright (c) 2021 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("N11"), 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 # MT25QL128 ("spiflash4x", 0, # clock needs to be accessed through STARTUPE2 Subsignal("cs_n", Pins("L12")), Subsignal("clk", Pins("E8")), Subsignal("dq", Pins("J13", "J14", "K15", "K16")), IOStandard("LVCMOS33") ), # DDR3 SDRAM # MT41J128M16JT-125K ("ddram", 0, Subsignal("a", Pins("B14 C8 A14 C14 C9 B10 D9 A12 D8 A13 B12 A9 A8 B11"), IOStandard("SSTL135")), Subsignal("ba", Pins("C16 A15 B15"), IOStandard("SSTL135")), Subsignal("ras_n", Pins("B16"), IOStandard("SSTL135")), Subsignal("cas_n", Pins("C11"), IOStandard("SSTL135")), Subsignal("we_n", Pins("C12"), IOStandard("SSTL135")), # cs_n is hardwired on the board #Subsignal("cs_n", Pins("-"), IOStandard("SSTL135")), Subsignal("dm", Pins("F12 H11"), IOStandard("SSTL135")), Subsignal("dq", Pins( "F15 F13 E16 D11 E12 E13 D16 E11", "G12 J16 G16 J15 H14 H12 H16 H13"), IOStandard("SSTL135"), Misc("IN_TERM=UNTUNED_SPLIT_40")), Subsignal("dqs_p", Pins("D14 G14"), IOStandard("DIFF_SSTL135"), Misc("IN_TERM=UNTUNED_SPLIT_40")), Subsignal("dqs_n", Pins("D15 F14"), IOStandard("DIFF_SSTL135"), Misc("IN_TERM=UNTUNED_SPLIT_40")), Subsignal("clk_p", Pins("B9"), IOStandard("DIFF_SSTL135")), Subsignal("clk_n", Pins("A10"), IOStandard("DIFF_SSTL135")), Subsignal("cke", Pins("D13"), IOStandard("SSTL135")), Subsignal("odt", Pins("C13"), IOStandard("SSTL135")), Subsignal("reset_n", Pins("E15"), IOStandard("SSTL135")), 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 U7 and J3 is U8 _connectors = [ ("J2", { # odd row even row 7: "M12", 8: "N13", 9: "N14", 10: "N16", 11: "P15", 12: "P16", 13: "R15", 14: "R16", 15: "T14", 16: "T15", 17: "P13", 18: "P14", 19: "T13", 20: "R13", 21: "T12", 22: "R12", 23: "L13", 24: "N12", 25: "K12", 26: "K13", 27: "P10", 28: "P11", 29: "N9", 30: "P9", 31: "T10", 32: "R11", 33: "T9", 34: "R10", 35: "T8", 36: "R8", 37: "T7", 38: "R7", 39: "T5", 40: "R6", 41: "P6", 42: "R5", 43: "N6", 44: "M6", 45: "L5", 46: "P5", 47: "T4", 48: "T3", 49: "R3", 50: "T2", 51: "R2", 52: "R1", 53: "M5", 54: "N4", 55: "P4", 56: "P3", 57: "N1", 58: "P1", 59: "M2", 60: "M1", }), ("J3", { # odd row even row 7: "B7", 8: "A7", 9: "B6", 10: "B5", 11: "E6", 12: "K5", 13: "J5", 14: "J4", 15: "G5", 16: "G4", 17: "C7", 18: "C6", 19: "D6", 20: "D5", 21: "A5", 22: "A4", 23: "B4", 24: "A3", 25: "D4", 26: "C4", 27: "C3", 28: "C2", 29: "B2", 30: "A2", 31: "C1", 32: "B1", 33: "E2", 34: "D1", 35: "E3", 36: "D3", 37: "F5", 38: "E5", 39: "F2", 40: "E1", 41: "F4", 42: "F3", 43: "G2", 44: "G1", 45: "H2", 46: "H1", 47: "K1", 48: "J1", 49: "L3", 50: "L2", 51: "H5", 52: "H4", 53: "J3", 54: "H3", 55: "K3", 56: "K2", 57: "L4", 58: "M4", 59: "N3", 60: "N2", }) ] # Platform ----------------------------------------------------------------------------------------- class Platform(Xilinx7SeriesPlatform): default_clk_name = "clk50" default_clk_period = 1e9/50e6 # these resources conflict with daughterboard resources # so they are only used if the daughterboard is not present core_resources = [ ("user_led", 0, Pins("E6"), IOStandard("LVCMOS33")), ("cpu_reset", 0, Pins("K5"), IOStandard("LVCMOS33")), ] def __init__(self, toolchain="vivado", with_daughterboard=False, with_core_resources=True): device = "xc7a35tftg256-1" io = _io connectors = _connectors if with_daughterboard: from litex_boards.platforms.qmtech_daughterboard import QMTechDaughterboard daughterboard = QMTechDaughterboard(IOStandard("LVCMOS33")) io += daughterboard.io connectors += daughterboard.connectors elif with_core_resources: io += self.core_resources Xilinx7SeriesPlatform.__init__(self, device, io, connectors, toolchain=toolchain) self.toolchain.bitstream_commands = \ ["set_property BITSTREAM.CONFIG.SPI_BUSWIDTH 4 [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 0.675 [get_iobanks 15]") 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 = "bscan_spi_xc7a35t.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)