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litex-boards/litex_boards/platforms/zedboard.py

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# This file is Copyright (c) 2019 Michael Betz <michibetz@gmail.com>
# License: BSD
from litex.build.generic_platform import Pins, IOStandard, Subsignal
from litex.build.xilinx import XilinxPlatform
from litex.build.openocd import OpenOCD
_io = [
# 8 LEDs above DIP switches (Bank 33)
("user_led", 0, Pins("T22"), IOStandard("LVCMOS33")),
("user_led", 1, Pins("T21"), IOStandard("LVCMOS33")),
("user_led", 2, Pins("U22"), IOStandard("LVCMOS33")),
("user_led", 3, Pins("U21"), IOStandard("LVCMOS33")),
("user_led", 4, Pins("V22"), IOStandard("LVCMOS33")),
("user_led", 5, Pins("W22"), IOStandard("LVCMOS33")),
("user_led", 6, Pins("U19"), IOStandard("LVCMOS33")),
("user_led", 7, Pins("U14"), IOStandard("LVCMOS33")),
# UG-2832HSWEG04 (ssd1306)
("zed_oled", 0,
Subsignal("clk", Pins("AB12")),
Subsignal("mosi", Pins("AA12")),
# OLED does not have a MISO pin :(
Subsignal("reset_n", Pins("U9")),
Subsignal("dc", Pins("U10")),
Subsignal("vbat_n", Pins("U11")),
Subsignal("vdd_n", Pins("U12")),
IOStandard("LVCMOS33")
),
# 8 Switches (Bank 35)
("user_sw", 0, Pins("F22"), IOStandard("LVCMOS18")),
("user_sw", 1, Pins("G22"), IOStandard("LVCMOS18")),
("user_sw", 2, Pins("H22"), IOStandard("LVCMOS18")),
("user_sw", 3, Pins("F21"), IOStandard("LVCMOS18")),
("user_sw", 4, Pins("H19"), IOStandard("LVCMOS18")),
("user_sw", 5, Pins("H18"), IOStandard("LVCMOS18")),
("user_sw", 6, Pins("H17"), IOStandard("LVCMOS18")),
("user_sw", 7, Pins("M15"), IOStandard("LVCMOS18")),
# push buttons (Bank 34)
# ("user_btn", 0, Pins("D13"), IOStandard("LVCMOS18")),
# ("user_btn", 1, Pins("C10"), IOStandard("LVCMOS18")),
("user_btn_c", 0, Pins("P16"), IOStandard("LVCMOS25")),
("user_btn_d", 0, Pins("R16"), IOStandard("LVCMOS25")),
("user_btn_l", 0, Pins("N15"), IOStandard("LVCMOS25")),
("user_btn_r", 0, Pins("R18"), IOStandard("LVCMOS25")),
("user_btn_u", 0, Pins("T18"), IOStandard("LVCMOS25")),
# Clock source (Bank 13)
("clk100", 0, Pins("Y9"), IOStandard("LVCMOS33")),
# PS stuff
("ps7_clk", 0, Pins("F7")),
("ps7_porb", 0, Pins("B5")),
("ps7_srstb", 0, Pins("C9")),
("ps7_mio", 0, Pins("G6 A1 A2 F6 E4 A3 A4 D5 E5 C4 G7 B4 C5 A6 B6 E6 D6 E9 A7 E10 A8 F11 A14 E11 B7 F12 A13 D7 A12 E8 A11 F9 C7 G13 B12 F14 A9 B14 F13 C13 E14 C8 D8 B11 E13 B9 D12 B10 D11 C14 D13 C10 D10 C12")),
("ps7_ddram", 0,
Subsignal("addr",
Pins("M4 M5 K4 L4 K6 K5 J7 J6 J5 H5 J3 G5 H4 F4 G4")),
Subsignal("ba", Pins("L7 L6 M6")),
Subsignal("cas_n", Pins("P3")),
Subsignal("cke", Pins("V3")),
Subsignal("ck_n", Pins("N5")),
Subsignal("ck_p", Pins("N4")),
Subsignal("cs_n", Pins("P6")),
Subsignal("dm", Pins("B1 H3 P1 AA2")),
Subsignal("dq",
Pins("D1 C3 B2 D3 E3 E1 F2 F1 G2 G1 L1 L2 L3 K1 J1 K3 "
"M1 T3 N3 T1 R3 T2 M2 R1 AA3 U1 AA1 U2 W1 Y3 W3 Y1"),
),
Subsignal("dqs_n", Pins("D2 J2 P2 W2")),
Subsignal("dqs_p", Pins("C2 H2 N2 V2")),
Subsignal("reset_n", Pins("F3")),
Subsignal("odt", Pins("P5")),
Subsignal("ras_n", Pins("R5")),
Subsignal("vrn", Pins("M7")),
Subsignal("vrp", Pins("N7")),
Subsignal("we_n", Pins("R4"))
)
]
_connectors = [
# access a pin with `pmoda:N`, where N is:
# N: 0 1 2 3 4 5 6 7
# Pin: 1 2 3 4 7 8 9 10
# Bank 13
("pmoda", "Y11 AA11 Y10 AA9 AB11 AB10 AB9 AA8"),
("pmodb", "W12 W11 V10 W8 V12 W10 V9 V8"),
("pmodc", "AB6 AB7 AA4 Y4 T6 R6 U4 T4"),
("pmodd", "W7 V7 V4 V5 W5 W6 U5 U6"),
("XADC", {
# Bank 34
"gio_0": "H15",
"gio_1": "R15",
"gio_2": "K15",
"gio_3": "J15",
# Bank 35
"AD0N_R": "E16",
"AD0P_R": "F16",
"AD8N_N": "D17",
"AD8P_R": "D16"
}),
("LPC", {
# "DP0_C2M_N": "", # NC
# "DP0_C2M_P": "", # NC
# "DP0_M2C_N": "", # NC
# "DP0_M2C_P": "", # NC
# "GBTCLK0_M2C_N": "", # NC
# "GBTCLK0_M2C_P": "", # NC
"CLK0_M2C_N": "L19",
"CLK0_M2C_P": "L18",
"CLK1_M2C_N": "C19",
"CLK1_M2C_P": "D18",
"IIC_SCL_MAIN": "R7",
"IIC_SDA_MAIN": "U7",
"LA00_CC_N": "M20",
"LA00_CC_P": "M19",
"LA01_CC_N": "N20",
"LA01_CC_P": "N19",
"LA02_N": "P18",
"LA02_P": "P17",
"LA03_N": "P22",
"LA03_P": "N22",
"LA04_N": "M22",
"LA04_P": "M21",
"LA05_N": "K18",
"LA05_P": "J18",
"LA06_N": "L22",
"LA06_P": "L21",
"LA07_N": "T17",
"LA07_P": "T16",
"LA08_N": "J22",
"LA08_P": "J21",
"LA09_N": "R21",
"LA09_P": "R20",
"LA10_N": "T19",
"LA10_P": "R19",
"LA11_N": "N18",
"LA11_P": "N17",
"LA12_N": "P21",
"LA12_P": "P20",
"LA13_N": "M17",
"LA13_P": "L17",
"LA14_N": "K20",
"LA14_P": "K19",
"LA15_N": "J17",
"LA15_P": "J16",
"LA16_N": "K21",
"LA16_P": "J20",
"LA17_CC_N": "B20",
"LA17_CC_P": "B19",
"LA18_CC_N": "C20",
"LA18_CC_P": "D20",
"LA19_N": "G16",
"LA19_P": "G15",
"LA20_N": "G21",
"LA20_P": "G20",
"LA21_N": "E20",
"LA21_P": "E19",
"LA22_N": "F19",
"LA22_P": "G19",
"LA23_N": "D15",
"LA23_P": "E15",
"LA24_N": "A19",
"LA24_P": "A18",
"LA25_N": "C22",
"LA25_P": "D22",
"LA26_N": "E18",
"LA26_P": "F18",
"LA27_N": "D21",
"LA27_P": "E21",
"LA28_N": "A17",
"LA28_P": "A16",
"LA29_N": "C18",
"LA29_P": "C17",
"LA30_N": "B15",
"LA30_P": "C15",
"LA31_N": "B17",
"LA31_P": "B16",
"LA32_N": "A22",
"LA32_P": "A21",
"LA33_N": "B22",
"LA33_P": "B21",
"PRSNT_M2C_L": "AB14"
})
]
class Platform(XilinxPlatform):
default_clk_name = "clk100"
default_clk_period = 10.0
def __init__(self, toolchain="vivado"):
XilinxPlatform.__init__(
self,
"xc7z020clg484-1",
_io,
_connectors,
toolchain=toolchain
)
def create_programmer(self):
return OpenOCD(config="board/digilent_zedboard.cfg")
def do_finalize(self, fragment):
XilinxPlatform.do_finalize(self, fragment)
self.add_period_constraint(
self.lookup_request(Platform.default_clk_name, loose=True),
Platform.default_clk_period
)
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