ecp5_evn.py 4.44 KB
Newer Older
DurandA's avatar
DurandA committed
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
# This file is Copyright (c) 2019 Arnaud Durand <arnaud.durand@unifr.ch>
# License: BSD

from litex.build.generic_platform import *
from litex.build.lattice import LatticePlatform
from litex.build.lattice.programmer import LatticeProgrammer
from litex.build.openocd import OpenOCD

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

_io = [
    ("clk12", 0, Pins("A10"), IOStandard("LVCMOS33")),
    ("rst_n", 0, Pins("G2"), IOStandard("LVCMOS33")),

    ("user_led", 0, Pins("A13"), IOStandard("LVCMOS25")),
    ("user_led", 1, Pins("A12"), IOStandard("LVCMOS25")),
    ("user_led", 2, Pins("B19"), IOStandard("LVCMOS25")),
    ("user_led", 3, Pins("A18"), IOStandard("LVCMOS25")),
    ("user_led", 4, Pins("B18"), IOStandard("LVCMOS25")),
    ("user_led", 5, Pins("C17"), IOStandard("LVCMOS25")),
    ("user_led", 6, Pins("A17"), IOStandard("LVCMOS25")),
    ("user_led", 7, Pins("B17"), IOStandard("LVCMOS25")),

    ("user_dip_btn", 1, Pins("J1"), IOStandard("LVCMOS33")),
    ("user_dip_btn", 2, Pins("H1"), IOStandard("LVCMOS33")),
    ("user_dip_btn", 3, Pins("K1"), IOStandard("LVCMOS33")),
    ("user_dip_btn", 4, Pins("E15"), IOStandard("LVCMOS25")),
    ("user_dip_btn", 5, Pins("D16"), IOStandard("LVCMOS25")),
    ("user_dip_btn", 6, Pins("B16"), IOStandard("LVCMOS25")),
    ("user_dip_btn", 7, Pins("C16"), IOStandard("LVCMOS25")),
    ("user_dip_btn", 8, Pins("A16"), IOStandard("LVCMOS25")),

    ("serial", 0,
        Subsignal("rx", Pins("P2"), IOStandard("LVCMOS33")),
        Subsignal("tx", Pins("P3"), IOStandard("LVCMOS33")),
    ),

    ("clk200", 0,
        Subsignal("p", Pins("Y19")),
        Subsignal("n", Pins("W20")),
        IOStandard("LVDS")
    ),
    ("ext_clk50", 0, Pins("B11"), IOStandard("LVCMOS33")),
44
    ("ext_clk50_en", 0, Pins("C11"), IOStandard("LVCMOS33")),
DurandA's avatar
DurandA committed
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
]

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

_connectors = [
    ("RASP",
        "None",  # (no pin 0)
        "None",  #  1 3.3V
        "None",  #  2 5V
        "T17",   #  3 RASP_IO02
        "None",  #  4 5V
        "U16",   #  5 RASP_IO03
        "None",  #  6 GND
        "U17",   #  7 RASP_IO04
        "P18",   #  8 RASP_IO14
        "None",  #  9 GND
        "N20",   # 10 RASP_IO15
        "N19",   # 11 RASP_IO17
        "T16",   # 12 RASP_IO18
        "M18",   # 13 RASP_IO27
        "None",  # 14 GND
        "N17",   # 15 RASP_IO22
        "P17",   # 16 RASP_IO23
        "None",  # 17 3.3V
        "M17",   # 18 RASP_IO24
        "U20",   # 19 RASP_IO10
        "None",  # 20 GND
        "T19",   # 21 RASP_IO09
        "N18",   # 22 RASP_IO25
        "R20",   # 23 RASP_IO11
        "U19",   # 24 RASP_IO08
        "None",  # 25 GND
        "R18",   # 26 RASP_IO07
        "L18",   # 27 RASP_ID_SD
        "L17",   # 28 RASP_ID_SC
        "U18",   # 29 RASP_IO05
        "None",  # 30 GND
        "T18",   # 31 RASP_IO06
        "T20",   # 32 RASP_IO12
        "P20",   # 33 RASP_IO13
        "None",  # 34 GND
        "R17",   # 35 RASP_IO19
        "P19",   # 36 RASP_IO16
        "N16",   # 37 RASP_IO26
        "P16",   # 38 RASP_IO20
        "None",  # 39 GND
        "R16",   # 40 RASP_IO21
    ),

    ("PMOD",
        "None",  # (no pin 0)
        "C6",    #  1
        "C7",    #  2
        "E8",    #  3
        "D8",    #  4
        "None",  #  5 GND
        "None",  #  6 VCCIO0
        "C8",    #  7 EXPCON_IO32
        "B8",    #  8 EXPCON_IO33
        "A7",    #  9 EXPCON_IO34
        "A8",    # 10 EXPCON_IO35
        "None",  # 11 GND
        "None",  # 12 VCCIO0
    ),
]

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

class Platform(LatticePlatform):
    default_clk_name = "clk12"
115
    default_clk_period = 1e9/12e6
DurandA's avatar
DurandA committed
116 117 118 119 120 121

    def __init__(self, **kwargs):
        LatticePlatform.__init__(self, "LFE5UM5G-85F-8BG381", _io, _connectors, **kwargs)

    def request(self, *args, **kwargs):
        if "serial" in args:
122 123 124
            print("two 0 Ω resistors shoud be populated on R34 and R35 and "
            "the FT2232H should be configured to UART with virtual COM on "
            "port B")
DurandA's avatar
DurandA committed
125
        if "ext_clk50" in args:
126
            print("an oscillator must be populated on X5")
DurandA's avatar
DurandA committed
127 128 129 130 131 132 133
            
        return LatticePlatform.request(self, *args, **kwargs)

    def create_programmer(self):
        fdir = os.path.join(
            os.path.abspath(os.path.dirname(__file__)), "prog")
        return OpenOCD(os.path.join(fdir, "ecp5-evn.cfg"))