litex-boards/litex_boards/platforms/sipeed_tang_nano_9k.py at master · litex-hub/litex-boards · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2022 Icenowy Zheng <icenowy@aosc.io>
# SPDX-License-Identifier: BSD-2-Clause

from migen import *

from litex.build.generic_platform import *
from litex.build.gowin.platform import GowinPlatform
from litex.build.gowin.programmer import GowinProgrammer
from litex.build.openfpgaloader import OpenFPGALoader


# IOs ----------------------------------------------------------------------------------------------

_io = [
    # Clk / Rst
    ("clk27",  0, Pins("52"), IOStandard("LVCMOS33")),

    # Leds
    ("user_led", 0, Pins("10"), IOStandard("LVCMOS18")),
    ("user_led", 1, Pins("11"), IOStandard("LVCMOS18")),
    ("user_led", 2, Pins("13"), IOStandard("LVCMOS18")),
    ("user_led", 3, Pins("14"), IOStandard("LVCMOS18")),
    ("user_led", 4, Pins("15"), IOStandard("LVCMOS18")),
    ("user_led", 5, Pins("16"), IOStandard("LVCMOS18")),

    # Buttons.
    ("user_btn_n", 0, Pins("3"), IOStandard("LVCMOS18")),
    ("user_btn_n", 1, Pins("4"), IOStandard("LVCMOS18")),

    # Serial
    ("serial", 0,
        Subsignal("rx", Pins("18")),
        Subsignal("tx", Pins("17")),
        IOStandard("LVCMOS33")
    ),

    # SPIFlash
    ("spiflash", 0,
        Subsignal("cs_n", Pins("60"), IOStandard("LVCMOS33")),
        Subsignal("clk",  Pins("59"), IOStandard("LVCMOS33")),
        Subsignal("miso", Pins("62"), IOStandard("LVCMOS33")),
        Subsignal("mosi", Pins("61"), IOStandard("LVCMOS33")),
    ),

    ("spisdcard", 0,
        Subsignal("clk",  Pins("36")),
        Subsignal("mosi", Pins("37")),
        Subsignal("cs_n", Pins("38")),
        Subsignal("miso", Pins("39")),
        IOStandard("LVCMOS33"),
    ),

    # LCD
    ("lcd", 0,
        Subsignal("clk", Pins("35")),
        Subsignal("hs",  Pins("40")),
        Subsignal("vs",  Pins("34")),
        Subsignal("de",  Pins("33")),
        Subsignal("r",   Pins("75 74 73 72 71")),
        Subsignal("g",   Pins("70 69 68 57 56 55")),
        Subsignal("b",   Pins("54 53 51 42 41")),
        IOStandard("LVCMOS33"),
    ),
    ("lcd_backlight", 0, Pins("86"), IOStandard("LVCMOS33")),

    # PSRAM
    ("O_psram_ck",      0, Pins(2)),
    ("O_psram_ck_n",    0, Pins(2)),
    ("O_psram_cs_n",    0, Pins(2)),
    ("O_psram_reset_n", 0, Pins(2)),
    ("IO_psram_dq",     0, Pins(16)),
    ("IO_psram_rwds",   0, Pins(2)),

    # HDMI.
    ("hdmi", 0,
        Subsignal("clk_p",   Pins("69")),
        Subsignal("clk_n",   Pins("68")),
        Subsignal("data0_p", Pins("71")),
        Subsignal("data0_n", Pins("70")),
        Subsignal("data1_p", Pins("73")),
        Subsignal("data1_n", Pins("72")),
        Subsignal("data2_p", Pins("75")),
        Subsignal("data2_n", Pins("74")),
        Misc("PULL_MODE=NONE"),
    ),

    # SPI RGB LCD.
    ("spilcd", 0,
        Subsignal("reset", Pins("47")),
        Subsignal("cs",    Pins("48")),
        Subsignal("clk",   Pins("79")),
        Subsignal("mosi",  Pins("77")),
        Subsignal("rs",    Pins("47")),
        IOStandard("LVCMOS33"),
    ),
]

# Connectors ---------------------------------------------------------------------------------------

_connectors = [
    ["J6", "38 37 36 39 25 26 27 28 29 30 33 34 40 35 41 42 51 53 54 55 56 57 68 69"],
    ["J7", "63 86 85 84 83 82 81 80 79 77 76 75 74 73 72 71 70  - 48 49 31 32  -  -"],
]

# Platform -----------------------------------------------------------------------------------------

class Platform(GowinPlatform):
    default_clk_name   = "clk27"
    default_clk_period = 1e9/27e6

    def __init__(self, toolchain="gowin"):
        GowinPlatform.__init__(self, "GW1NR-LV9QN88PC6/I5", _io, _connectors, toolchain=toolchain, devicename="GW1NR-9C")
        self.toolchain.options["use_mspi_as_gpio"] = 1
        self.toolchain.options["use_sspi_as_gpio"] = 1

    def create_programmer(self, kit="openfpgaloader"):
        if kit == "gowin":
            return GowinProgrammer(self.devicename)
        else:
            return OpenFPGALoader(cable="ft2232")

    def do_finalize(self, fragment):
        GowinPlatform.do_finalize(self, fragment)
        self.add_period_constraint(self.lookup_request("clk27", loose=True), 1e9/27e6)