litex-boards/litex_boards/platforms/digilent_arty.py

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#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2015 Yann Sionneau <yann.sionneau@gmail.com>
# Copyright (c) 2015-2019 Florent Kermarrec <florent@enjoy-digital.fr>
# SPDX-License-Identifier: BSD-2-Clause
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from litex.build.generic_platform import *
from litex.build.xilinx import XilinxPlatform
from litex.build.openocd import OpenOCD
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# IOs ----------------------------------------------------------------------------------------------
_io = [
# Clk / Rst
("clk100", 0, Pins("E3"), IOStandard("LVCMOS33")),
("cpu_reset", 0, Pins("C2"), IOStandard("LVCMOS33")),
# Leds
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("user_led", 0, Pins("H5"), IOStandard("LVCMOS33")),
("user_led", 1, Pins("J5"), IOStandard("LVCMOS33")),
("user_led", 2, Pins("T9"), IOStandard("LVCMOS33")),
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("user_led", 3, Pins("T10"), IOStandard("LVCMOS33")),
("rgb_led", 0,
Subsignal("r", Pins("G6")),
Subsignal("g", Pins("F6")),
Subsignal("b", Pins("E1")),
IOStandard("LVCMOS33"),
),
("rgb_led", 1,
Subsignal("r", Pins("G3")),
Subsignal("g", Pins("J4")),
Subsignal("b", Pins("G4")),
IOStandard("LVCMOS33"),
),
("rgb_led", 2,
Subsignal("r", Pins("J3")),
Subsignal("g", Pins("J2")),
Subsignal("b", Pins("H4")),
IOStandard("LVCMOS33"),
),
("rgb_led", 3,
Subsignal("r", Pins("K1")),
Subsignal("g", Pins("H6")),
Subsignal("b", Pins("K2")),
IOStandard("LVCMOS33"),
),
# Switches
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("user_sw", 0, Pins("A8"), IOStandard("LVCMOS33")),
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("user_sw", 1, Pins("C11"), IOStandard("LVCMOS33")),
("user_sw", 2, Pins("C10"), IOStandard("LVCMOS33")),
("user_sw", 3, Pins("A10"), IOStandard("LVCMOS33")),
# Buttons
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("user_btn", 0, Pins("D9"), IOStandard("LVCMOS33")),
("user_btn", 1, Pins("C9"), IOStandard("LVCMOS33")),
("user_btn", 2, Pins("B9"), IOStandard("LVCMOS33")),
("user_btn", 3, Pins("B8"), IOStandard("LVCMOS33")),
# Serial
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("serial", 0,
Subsignal("tx", Pins("D10")),
Subsignal("rx", Pins("A9")),
IOStandard("LVCMOS33")
),
# SPI
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("spi", 0,
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Subsignal("clk", Pins("F1")),
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Subsignal("cs_n", Pins("C1")),
Subsignal("mosi", Pins("H1")),
Subsignal("miso", Pins("G1")),
IOStandard("LVCMOS33"),
),
# I2C
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("i2c", 0,
Subsignal("scl", Pins("L18")),
Subsignal("sda", Pins("M18")),
Subsignal("scl_pup", Pins("A14")),
Subsignal("sda_pup", Pins("A13")),
IOStandard("LVCMOS33"),
),
# SPIFlash
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("spiflash", 0,
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Subsignal("cs_n", Pins("L13")),
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Subsignal("clk", Pins("L16")),
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Subsignal("mosi", Pins("K17")),
Subsignal("miso", Pins("K18")),
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Subsignal("wp", Pins("L14")),
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Subsignal("hold", Pins("M14")),
IOStandard("LVCMOS33"),
),
("spiflash4x", 0,
Subsignal("cs_n", Pins("L13")),
Subsignal("clk", Pins("L16")),
Subsignal("dq", Pins("K17 K18 L14 M14")),
IOStandard("LVCMOS33")
),
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# DDR3 SDRAM
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("ddram", 0,
Subsignal("a", Pins(
"R2 M6 N4 T1 N6 R7 V6 U7",
"R8 V7 R6 U6 T6 T8"),
IOStandard("SSTL135")),
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Subsignal("ba", Pins("R1 P4 P2"), IOStandard("SSTL135")),
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Subsignal("ras_n", Pins("P3"), IOStandard("SSTL135")),
Subsignal("cas_n", Pins("M4"), IOStandard("SSTL135")),
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Subsignal("we_n", Pins("P5"), IOStandard("SSTL135")),
Subsignal("cs_n", Pins("U8"), IOStandard("SSTL135")),
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Subsignal("dm", Pins("L1 U1"), IOStandard("SSTL135")),
Subsignal("dq", Pins(
"K5 L3 K3 L6 M3 M1 L4 M2",
"V4 T5 U4 V5 V1 T3 U3 R3"),
IOStandard("SSTL135"),
Misc("IN_TERM=UNTUNED_SPLIT_40")),
Subsignal("dqs_p", Pins("N2 U2"),
IOStandard("DIFF_SSTL135"),
Misc("IN_TERM=UNTUNED_SPLIT_40")),
Subsignal("dqs_n", Pins("N1 V2"),
IOStandard("DIFF_SSTL135"),
Misc("IN_TERM=UNTUNED_SPLIT_40")),
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Subsignal("clk_p", Pins("U9"), IOStandard("DIFF_SSTL135")),
Subsignal("clk_n", Pins("V9"), IOStandard("DIFF_SSTL135")),
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Subsignal("cke", Pins("N5"), IOStandard("SSTL135")),
Subsignal("odt", Pins("R5"), IOStandard("SSTL135")),
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Subsignal("reset_n", Pins("K6"), IOStandard("SSTL135")),
Misc("SLEW=FAST"),
),
# MII Ethernet
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("eth_ref_clk", 0, Pins("G18"), IOStandard("LVCMOS33")),
("eth_clocks", 0,
Subsignal("tx", Pins("H16")),
Subsignal("rx", Pins("F15")),
IOStandard("LVCMOS33"),
),
("eth", 0,
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Subsignal("rst_n", Pins("C16")),
Subsignal("mdio", Pins("K13")),
Subsignal("mdc", Pins("F16")),
Subsignal("rx_dv", Pins("G16")),
Subsignal("rx_er", Pins("C17")),
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Subsignal("rx_data", Pins("D18 E17 E18 G17")),
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Subsignal("tx_en", Pins("H15")),
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Subsignal("tx_data", Pins("H14 J14 J13 H17")),
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Subsignal("col", Pins("D17")),
Subsignal("crs", Pins("G14")),
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IOStandard("LVCMOS33"),
),
]
# Connectors ---------------------------------------------------------------------------------------
_connectors = [
("pmoda", "G13 B11 A11 D12 D13 B18 A18 K16"),
("pmodb", "E15 E16 D15 C15 J17 J18 K15 J15"),
("pmodc", "U12 V12 V10 V11 U14 V14 T13 U13"),
("pmodd", "D4 D3 F4 F3 E2 D2 H2 G2"),
("ck_io", {
# Outer Digital Header
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"ck_io0" : "V15",
"ck_io1" : "U16",
"ck_io2" : "P14",
"ck_io3" : "T11",
"ck_io4" : "R12",
"ck_io5" : "T14",
"ck_io6" : "T15",
"ck_io7" : "T16",
"ck_io8" : "N15",
"ck_io9" : "M16",
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"ck_io10" : "V17",
"ck_io11" : "U18",
"ck_io12" : "R17",
"ck_io13" : "P17",
# Inner Digital Header
"ck_io26" : "U11",
"ck_io27" : "V16",
"ck_io28" : "M13",
"ck_io29" : "R10",
"ck_io30" : "R11",
"ck_io31" : "R13",
"ck_io32" : "R15",
"ck_io33" : "P15",
"ck_io34" : "R16",
"ck_io35" : "N16",
"ck_io36" : "N14",
"ck_io37" : "U17",
"ck_io38" : "T18",
"ck_io39" : "R18",
"ck_io40" : "P18",
"ck_io41" : "N17",
# Outer Analog Header as Digital IO
"ck_a0" : "F5",
"ck_a1" : "D8",
"ck_a2" : "C7",
"ck_a3" : "E7",
"ck_a4" : "D7",
"ck_a5" : "D5",
# Inner Analog Header as Digital IO
"ck_io20" : "B7",
"ck_io21" : "B6",
"ck_io22" : "E6",
"ck_io23" : "E5",
"ck_io24" : "A4",
"ck_io25" : "A3",
} ),
("XADC", {
# Outer Analog Header
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"vaux4_n" : "C5",
"vaux4_p" : "C6",
"vaux5_n" : "A5",
"vaux5_p" : "A6",
"vaux6_n" : "B4",
"vaux6_p" : "C4",
"vaux7_n" : "A1",
"vaux7_p" : "B1",
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"vaux15_n" : "B2",
"vaux15_p" : "B3",
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"vaux0_n" : "C14",
"vaux0_p" : "D14",
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# Inner Analog Header
"vaux12_n" : "B7",
"vaux12_p" : "B6",
"vaux13_n" : "E6",
"vaux13_p" : "E5",
"vaux14_n" : "A4",
"vaux14_p" : "A3",
# Power Measurements
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"vsnsuv_n" : "B17",
"vsnsuv_p" : "B16",
"vsns5v0_n" : "B12",
"vsns5v0_p" : "C12",
"isns5v0_n" : "F14",
"isns5v0_n" : "F13",
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"isns0v95_n" : "A16",
"isns0v95_n" : "A15",
} ),
]
# PMODS --------------------------------------------------------------------------------------------
def raw_pmod_io(pmod):
return [(pmod, 0, Pins(" ".join([f"{pmod}:{i:d}" for i in range(8)])), IOStandard("LVCMOS33"))]
def usb_pmod_io(pmod):
return [
# USB-UART PMOD: https://store.digilentinc.com/pmod-usbuart-usb-to-uart-interface/
("usb_uart", 0,
Subsignal("tx", Pins(f"{pmod}:1")),
Subsignal("rx", Pins(f"{pmod}:2")),
IOStandard("LVCMOS33")
),
]
_usb_uart_pmod_io = usb_pmod_io("pmodb") # USB-UART PMOD on JB.
def i2s_pmod_io(pmod):
return [
# I2S PMOD: https://store.digilentinc.com/pmod-i2s2-stereo-audio-input-and-output/
("i2s_rx_mclk", 0, Pins(f"{pmod}:4"), IOStandard("LVCMOS33")),
("i2s_rx", 0,
Subsignal("clk", Pins(f"{pmod}:6")),
Subsignal("sync", Pins(f"{pmod}:5")),
Subsignal("rx", Pins(f"{pmod}:7")),
IOStandard("LVCMOS33"),
),
("i2s_tx_mclk", 0, Pins(f"{pmod}:0"), IOStandard("LVCMOS33")),
("i2s_tx", 0,
Subsignal("clk",Pins(f"{pmod}:2")),
Subsignal("sync", Pins(f"{pmod}:1")),
Subsignal("tx", Pins(f"{pmod}:3")),
IOStandard("LVCMOS33"),
),
]
_i2s_pmod_io = i2s_pmod_io("pmoda") # I2S PMOD on JA.
def sdcard_pmod_io(pmod):
return [
# SDCard PMOD:
# - https://store.digilentinc.com/pmod-microsd-microsd-card-slot/
# - https://github.com/antmicro/arty-expansion-board
("spisdcard", 0,
Subsignal("clk", Pins(f"{pmod}:3")),
Subsignal("mosi", Pins(f"{pmod}:1"), Misc("PULLUP True")),
Subsignal("cs_n", Pins(f"{pmod}:0"), Misc("PULLUP True")),
Subsignal("miso", Pins(f"{pmod}:2"), Misc("PULLUP True")),
Misc("SLEW=FAST"), #NOTE: this is not supported by yosys+nextprn toolchain
IOStandard("LVCMOS33"),
),
("sdcard", 0,
Subsignal("data", Pins(f"{pmod}:2 {pmod}:4 {pmod}:5 {pmod}:0"), Misc("PULLUP True")),
Subsignal("cmd", Pins(f"{pmod}:1"), Misc("PULLUP True")),
Subsignal("clk", Pins(f"{pmod}:3")),
Subsignal("cd", Pins(f"{pmod}:6")),
Misc("SLEW=FAST"), #NOTE: this and all Misc() is not supported by yosys+nextprn toolchain
IOStandard("LVCMOS33"),
),
]
_sdcard_pmod_io = sdcard_pmod_io("pmodd") # SDCARD PMOD on JD.
def numato_sdcard_pmod_io(pmod):
return [
# SDCard PMOD:
# https://numato.com/product/micro-sd-expansion-module/
# This adaptor does not have the card detect (CD) pin connected
("spisdcard", 0,
Subsignal("clk", Pins(f"{pmod}:5")),
Subsignal("mosi", Pins(f"{pmod}:1"), Misc("PULLUP True")),
Subsignal("cs_n", Pins(f"{pmod}:4"), Misc("PULLUP True")),
Subsignal("miso", Pins(f"{pmod}:2"), Misc("PULLUP True")),
Misc("SLEW=FAST"),
IOStandard("LVCMOS33"),
),
("sdcard", 0,
Subsignal("data", Pins(f"{pmod}:2 {pmod}:6 {pmod}:0 {pmod}:4"), Misc("PULLUP True")),
Subsignal("cmd", Pins(f"{pmod}:1"), Misc("PULLUP True")),
Subsignal("clk", Pins(f"{pmod}:5")),
Misc("SLEW=FAST"),
IOStandard("LVCMOS33"),
),
]
_numato_sdcard_pmod_io = numato_sdcard_pmod_io("pmodd") # SDCARD PMOD on JD.
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# Platform -----------------------------------------------------------------------------------------
class Platform(XilinxPlatform):
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default_clk_name = "clk100"
default_clk_period = 1e9/100e6
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def __init__(self, variant="a7-35", toolchain="vivado"):
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device = {
"a7-35": "xc7a35ticsg324-1L",
"a7-100": "xc7a100tcsg324-1"
}[variant]
XilinxPlatform.__init__(self, device, _io, _connectors, toolchain=toolchain)
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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"]
if toolchain != "yosys+nextpnr": #this is not supported by yosys+pnr
self.add_platform_command("set_property INTERNAL_VREF 0.675 [get_iobanks 34]")
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def create_programmer(self):
bscan_spi = "bscan_spi_xc7a100t.bit" if "xc7a100t" in self.device else "bscan_spi_xc7a35t.bit"
return OpenOCD("openocd_xc7_ft2232.cfg", bscan_spi)
def do_finalize(self, fragment):
XilinxPlatform.do_finalize(self, fragment)
self.add_period_constraint(self.lookup_request("clk100", loose=True), 1e9/100e6)