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litex-boards/litex_boards/platforms/qmtech_artix7_fgg676.py

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#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2023 Hans Baier <hansfbaier@gmail.com>
# 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)
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