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 .resources import *
   7
   8
   9 __all__ = ["ICEBreakerPlatform"]
  10
  11
  12 class ICEBreakerPlatform(LatticeICE40Platform):
  13     device      = "iCE40UP5K"
  14     package     = "SG48"
  15     default_clk = "clk12"
  16     resources   = [
  17         Resource("clk12", 0, Pins("35", dir="i"),
  18                  Clock(12e6), Attrs(GLOBAL=True, IO_STANDARD="SB_LVCMOS")),
  19
  20         *LEDResources(pins="11 37", invert=True, attrs=Attrs(IO_STANDARD="SB_LVCMOS")),
  21         # Semantic aliases
  22         Resource("led_r", 0, PinsN("11", dir="o"), Attrs(IO_STANDARD="SB_LVCMOS")),
  23         Resource("led_g", 0, PinsN("37", dir="o"), Attrs(IO_STANDARD="SB_LVCMOS")),
  24
  25         *ButtonResources(pins="10", invert=True, attrs=Attrs(IO_STANDARD="SB_LVCMOS")),
  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_LVCMOS")
  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         *LEDResources(pins={2: "7", 3: "1", 4: "2", 5: "8", 6: "3"}, conn=("pmod", 2),
  48                       attrs=Attrs(IO_STANDARD="SB_LVCMOS")),
  49         # Semantic aliases
  50         Resource("led_r", 1, Pins("7", dir="o", conn=("pmod", 2)),
  51                  Attrs(IO_STANDARD="SB_LVCMOS")),
  52         Resource("led_g", 1, Pins("1", dir="o", conn=("pmod", 2)),
  53                  Attrs(IO_STANDARD="SB_LVCMOS")),
  54         Resource("led_g", 2, Pins("2", dir="o", conn=("pmod", 2)),
  55                  Attrs(IO_STANDARD="SB_LVCMOS")),
  56         Resource("led_g", 3, Pins("8", dir="o", conn=("pmod", 2)),
  57                  Attrs(IO_STANDARD="SB_LVCMOS")),
  58         Resource("led_g", 4, Pins("3", dir="o", conn=("pmod", 2)),
  59                  Attrs(IO_STANDARD="SB_LVCMOS")),
  60
  61         *ButtonResources(pins={1: "9", 2: "4", 3: "10"}, conn=("pmod", 2),
  62                          attrs=Attrs(IO_STANDARD="SB_LVCMOS")),
  63     ]
  64
  65     def toolchain_program(self, products, name):
  66         iceprog = os.environ.get("ICEPROG", "iceprog")
  67         with products.extract("{}.bin".format(name)) as bitstream_filename:
  68             subprocess.check_call([iceprog, bitstream_filename])
  69
  70
  71 if __name__ == "__main__":
  72     from .test.blinky import *
  73     p = ICEBreakerPlatform()
  74     p.add_resources(p.break_off_pmod)
  75     p.build(Blinky(), do_program=True)