src/soc/litex/florent/libresoc/ls180.py

   1 #
   2 # This file is part of LiteX.
   3 #
   4 # Copyright (c) 2018-2019 Florent Kermarrec <florent@enjoy-digital.fr>
   5 # SPDX-License-Identifier: BSD-2-Clause
   6
   7 from litex.build.generic_platform import *
   8 from litex.build.lattice import LatticePlatform
   9 from litex.build.lattice.programmer import UJProg
  10
  11 # IOs ----------------------------------------------------------------------------------------------
  12
  13 _io = [
  14     ("clk25", 0, Pins("G2"), IOStandard("LVCMOS33")),
  15     ("rst",   0, Pins("R1"), IOStandard("LVCMOS33")),
  16
  17     ("user_led", 0, Pins("B2"), IOStandard("LVCMOS33")),
  18     ("user_led", 1, Pins("C2"), IOStandard("LVCMOS33")),
  19     ("user_led", 2, Pins("C1"), IOStandard("LVCMOS33")),
  20     ("user_led", 3, Pins("D2"), IOStandard("LVCMOS33")),
  21     ("user_led", 4, Pins("D1"), IOStandard("LVCMOS33")),
  22     ("user_led", 5, Pins("E2"), IOStandard("LVCMOS33")),
  23     ("user_led", 6, Pins("E1"), IOStandard("LVCMOS33")),
  24     ("user_led", 7, Pins("H3"), IOStandard("LVCMOS33")),
  25
  26     ("serial", 0,
  27         Subsignal("tx", Pins("L4"), IOStandard("LVCMOS33")),
  28         Subsignal("rx", Pins("M1"), IOStandard("LVCMOS33"))
  29     ),
  30
  31     ("spisdcard", 0,
  32         Subsignal("clk",  Pins("J1")),
  33         Subsignal("mosi", Pins("J3"), Misc("PULLMODE=UP")),
  34         Subsignal("cs_n", Pins("H1"), Misc("PULLMODE=UP")),
  35         Subsignal("miso", Pins("K2"), Misc("PULLMODE=UP")),
  36         Misc("SLEWRATE=FAST"),
  37         IOStandard("LVCMOS33"),
  38     ),
  39
  40     ("sdcard", 0,
  41         Subsignal("clk",  Pins("J1")),
  42         Subsignal("cmd",  Pins("J3"), Misc("PULLMODE=UP")),
  43         Subsignal("data", Pins("K2 K1 H2 H1"), Misc("PULLMODE=UP")),
  44         Misc("SLEWRATE=FAST"),
  45         IOStandard("LVCMOS33"),
  46     ),
  47
  48     ("sdram_clock", 0, Pins("F19"), IOStandard("LVCMOS33")),
  49     ("sdram", 0,
  50         Subsignal("a",     Pins(
  51             "M20 M19 L20 L19 K20 K19 K18 J20",
  52             "J19 H20 N19 G20 G19")),
  53         Subsignal("dq",    Pins(
  54             "J16 L18 M18 N18 P18 T18 T17 U20",
  55             "E19 D20 D19 C20 E18 F18 J18 J17")),
  56         Subsignal("we_n",  Pins("T20")),
  57         Subsignal("ras_n", Pins("R20")),
  58         Subsignal("cas_n", Pins("T19")),
  59         Subsignal("cs_n",  Pins("P20")),
  60         Subsignal("cke",   Pins("F20")),
  61         Subsignal("ba",    Pins("P19 N20")),
  62         Subsignal("dm",    Pins("U19 E20")),
  63         IOStandard("LVCMOS33"),
  64         Misc("SLEWRATE=FAST"),
  65     ),
  66
  67     ("wifi_gpio0", 0, Pins("L2"), IOStandard("LVCMOS33")),
  68
  69     ("ext0p", 0, Pins("B11"), IOStandard("LVCMOS33")),
  70     ("ext1p", 0, Pins("A10"), IOStandard("LVCMOS33")),
  71
  72     ("gpio", 0,
  73         Subsignal("p", Pins("B11")),
  74         Subsignal("n", Pins("C11")),
  75         IOStandard("LVCMOS33")
  76     ),
  77     ("gpio", 1,
  78         Subsignal("p", Pins("A10")),
  79         Subsignal("n", Pins("A11")),
  80         IOStandard("LVCMOS33")
  81     ),
  82     ("gpio", 2,
  83         Subsignal("p", Pins("A9")),
  84         Subsignal("n", Pins("B10")),
  85         IOStandard("LVCMOS33")
  86     ),
  87     ("gpio", 3,
  88         Subsignal("p", Pins("B9")),
  89         Subsignal("n", Pins("C10")),
  90         IOStandard("LVCMOS33")
  91     ),
  92
  93     ("usb", 0,
  94         Subsignal("d_p", Pins("D15")),
  95         Subsignal("d_n", Pins("E15")),
  96         Subsignal("pullup", Pins("B12 C12")),
  97         IOStandard("LVCMOS33")
  98     ),
  99     ("oled_spi", 0,
 100         Subsignal("clk",  Pins("P4")),
 101         Subsignal("mosi", Pins("P3")),
 102         IOStandard("LVCMOS33"),
 103     ),
 104     ("oled_ctl", 0,
 105         Subsignal("dc",   Pins("P1")),
 106         Subsignal("resn", Pins("P2")),
 107         Subsignal("csn",  Pins("N2")),
 108         IOStandard("LVCMOS33"),
 109     ),
 110 ]
 111
 112 # Platform -----------------------------------------------------------------------------------------
 113
 114 class Platform(LatticePlatform):
 115     default_clk_name   = "clk25"
 116     default_clk_period = 1e9/25e6
 117
 118     def __init__(self, device="LFE5U-45F", **kwargs):
 119         assert device in ["LFE5U-25F", "LFE5U-45F", "LFE5U-85F"]
 120         LatticePlatform.__init__(self, device + "-6BG381C", _io, **kwargs)
 121
 122     def create_programmer(self):
 123         return UJProg()
 124
 125     def do_finalize(self, fragment):
 126         LatticePlatform.do_finalize(self, fragment)
 127         self.add_period_constraint(self.lookup_request("clk25", loose=True), 1e9/25e6)