nmigen_boards/icebreaker.py

   1 import os
   2 import subprocess
   3
   4 from nmigen.build import *
   5 from nmigen.vendor.lattice_ice40 import *
   6 from .dev import *
   7
   8
   9 __all__ = ["ICEBreakerPlatform"]
  10
  11
  12 class ICEBreakerPlatform(LatticeICE40Platform):
  13     device     = "iCE40UP5K"
  14     package    = "SG48"
  15     resources  = [
  16         Resource("clk12", 0, Pins("35", dir="i"),
  17                  Clock(12e6), Attrs(GLOBAL="1", IO_STANDARD="SB_LVCMOS33")),
  18
  19         Resource("user_led",  0, PinsN("11", dir="o"), Attrs(IO_STANDARD="SB_LVCMOS33")),
  20         Resource("user_led",  1, PinsN("37", dir="o"), Attrs(IO_STANDARD="SB_LVCMOS33")),
  21         # Color-specific aliases
  22         Resource("user_ledr", 0, PinsN("11", dir="o"), Attrs(IO_STANDARD="SB_LVCMOS33")),
  23         Resource("user_ledg", 0, PinsN("37", dir="o"), Attrs(IO_STANDARD="SB_LVCMOS33")),
  24
  25         Resource("user_btn",  0, PinsN("10", dir="i"), Attrs(IO_STANDARD="SB_LVCMOS33")),
  26
  27         UARTResource(0,
  28             rx="6", tx="9",
  29             attrs=Attrs(IO_STANDARD="SB_LVTTL", PULLUP="1")
  30         ),
  31
  32         *SPIFlashResources(0,
  33             cs="16", clk="15", mosi="14", miso="17", wp="12", hold="13",
  34             attrs=Attrs(IO_STANDARD="SB_LVCMOS33")
  35         ),
  36     ]
  37     connectors = [
  38         Connector("pmod", 0, "4 2 47 45 - -  3 48 46 44 - -"),  # PMOD1A
  39         Connector("pmod", 1, "43 38 34 31 - - 42 36 32 28 - -"), # PMOD1B
  40         Connector("pmod", 2, "27 25 21 19 - -  26 23 20 18 - -"), # PMOD2
  41     ]
  42     # The attached LED/button section can be either used standalone or as a PMOD.
  43     # Attach to platform using:
  44     # p.add_resources(p.break_off_pmod)
  45     # pmod_btn = plat.request("user_btn")
  46     break_off_pmod = [
  47          Resource("user_btn", 1, Pins("9", dir="i", conn=("pmod", 2)),
  48                   Attrs(IO_STANDARD="SB_LVCMOS33")),
  49          Resource("user_btn", 2, Pins("4", dir="i", conn=("pmod", 2)),
  50                   Attrs(IO_STANDARD="SB_LVCMOS33")),
  51          Resource("user_btn", 3, Pins("10", dir="i", conn=("pmod", 2)),
  52                   Attrs(IO_STANDARD="SB_LVCMOS33")),
  53
  54          Resource("user_led", 2, Pins("7", dir="o", conn=("pmod", 2)),
  55                   Attrs(IO_STANDARD="SB_LVCMOS33")),
  56          Resource("user_led", 3, Pins("1", dir="o", conn=("pmod", 2)),
  57                   Attrs(IO_STANDARD="SB_LVCMOS33")),
  58          Resource("user_led", 4, Pins("2", dir="o", conn=("pmod", 2)),
  59                   Attrs(IO_STANDARD="SB_LVCMOS33")),
  60          Resource("user_led", 5, Pins("8", dir="o", conn=("pmod", 2)),
  61                   Attrs(IO_STANDARD="SB_LVCMOS33")),
  62          Resource("user_led", 6, Pins("3", dir="o", conn=("pmod", 2)),
  63                   Attrs(IO_STANDARD="SB_LVCMOS33")),
  64
  65          # Color-specific aliases
  66          Resource("user_ledr", 1, Pins("7", dir="o", conn=("pmod", 2)),
  67                   Attrs(IO_STANDARD="SB_LVCMOS33")),
  68          Resource("user_ledg", 1, Pins("1", dir="o", conn=("pmod", 2)),
  69                   Attrs(IO_STANDARD="SB_LVCMOS33")),
  70          Resource("user_ledg", 2, Pins("2", dir="o", conn=("pmod", 2)),
  71                   Attrs(IO_STANDARD="SB_LVCMOS33")),
  72          Resource("user_ledg", 3, Pins("8", dir="o", conn=("pmod", 2)),
  73                   Attrs(IO_STANDARD="SB_LVCMOS33")),
  74          Resource("user_ledg", 4, Pins("3", dir="o", conn=("pmod", 2)),
  75                   Attrs(IO_STANDARD="SB_LVCMOS33"))
  76     ]
  77
  78     def toolchain_program(self, products, name):
  79         iceprog = os.environ.get("ICEPROG", "iceprog")
  80         with products.extract("{}.bin".format(name)) as bitstream_filename:
  81             subprocess.check_call([iceprog, bitstream_filename])
  82
  83
  84 if __name__ == "__main__":
  85     from ._blinky import Blinky
  86     p = ICEBreakerPlatform()
  87     p.add_resources(p.break_off_pmod)
  88     p.build(Blinky("clk12"), do_program=True)