nmigen_boards/tinyfpga_bx.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__ = ["TinyFPGABXPlatform"]
  10
  11
  12 class TinyFPGABXPlatform(LatticeICE40Platform):
  13     device      = "iCE40LP8K"
  14     package     = "CM81"
  15     default_clk = "clk16"
  16     resources   = [
  17         Resource("clk16", 0, Pins("B2", dir="i"),
  18                  Clock(16e6), Attrs(IO_STANDARD="SB_LVCMOS33")),
  19
  20         Resource("user_led", 0, Pins("B3", dir="o"), Attrs(IO_STANDARD="SB_LVCMOS33")),
  21
  22         Resource("usb", 0,
  23             Subsignal("d_p",    Pins("B4", dir="io")),
  24             Subsignal("d_n",    Pins("A4", dir="io")),
  25             Subsignal("pullup", Pins("A3", dir="o")),
  26             Attrs(IO_STANDARD="SB_LVCMOS33")
  27         ),
  28
  29         *SPIFlashResources(0,
  30             cs="F7", clk="G7", mosi="G6", miso="H7", wp="H4", hold="J8",
  31             attrs=Attrs(IO_STANDARD="SB_LVCMOS33")
  32         ),
  33     ]
  34     connectors  = [
  35         Connector("gpio", 0,
  36             # Left side of the board
  37             #     1  2  3  4  5  6  7  8  9 10 11 12 13
  38              "   A2 A1 B1 C2 C1 D2 D1 E2 E1 G2 H1 J1 H2 "
  39             # Right side of the board
  40             #          14 15 16 17 18 19 20 21 22 23 24
  41              "         H9 D9 D8 B8 A9 B8 A8 B7 A7 B6 A6 "
  42             # Bottom of the board
  43             # 25 26 27 28 29 30 31
  44              "G1 J3 J4 G9 J9 E8 J2"
  45         ),
  46     ]
  47
  48     def toolchain_program(self, products, name):
  49         tinyprog = os.environ.get("TINYPROG", "tinyprog")
  50         with products.extract("{}.bin".format(name)) as bitstream_filename:
  51             subprocess.check_call([tinyprog, "-p", bitstream_filename])
  52
  53
  54 if __name__ == "__main__":
  55     from ._blinky import Blinky
  56     TinyFPGABXPlatform().build(Blinky(), do_program=True)