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
   7
   8 __all__ = ["TinyFPGABXPlatform"]
   9
  10
  11 class TinyFPGABXPlatform(LatticeICE40Platform):
  12     device     = "lp8k"
  13     package    = "cm81"
  14     clocks     = [
  15         ("clk16", 16e6),
  16     ]
  17     resources  = [
  18         Resource("clk16", 0, Pins("B2", dir="i"),
  19                  extras={"IO_STANDARD": "SB_LVCMOS33"}),
  20
  21         Resource("user_led", 0, Pins("B3", dir="o"), extras={"IO_STANDARD": "SB_LVCMOS33"}),
  22
  23         Resource("usb", 0,
  24             Subsignal("d_p",    Pins("B4", dir="io")),
  25             Subsignal("d_n",    Pins("A4", dir="io")),
  26             Subsignal("pullup", Pins("A3", dir="o")),
  27             extras={"IO_STANDARD": "SB_LVCMOS33"}
  28         ),
  29
  30         Resource("spiflash", 0,
  31             Subsignal("cs_n", Pins("F7", dir="o")),
  32             Subsignal("clk",  Pins("G7", dir="o")),
  33             Subsignal("mosi", Pins("G6", dir="o")),
  34             Subsignal("miso", Pins("H7", dir="i")),
  35             Subsignal("wp",   Pins("H4", dir="o")),
  36             Subsignal("hold", Pins("J8", dir="o")),
  37             extras={"IO_STANDARD": "SB_LVCMOS33"}
  38         ),
  39
  40         Resource("spiflash4x", 0,
  41             Subsignal("cs_n", Pins("F7", dir="o")),
  42             Subsignal("clk",  Pins("G7", dir="o")),
  43             Subsignal("dq",   Pins("G6 H7 H4 J8", dir="io")),
  44             extras={"IO_STANDARD": "SB_LVCMOS33"}
  45         ),
  46     ]
  47     connectors = [
  48         Connector("gpio", 0,
  49             # Left side of the board
  50             #     1  2  3  4  5  6  7  8  9 10 11 12 13
  51              "   A2 A1 B1 C2 C1 D2 D1 E2 E1 G2 H1 J1 H2"
  52             # Right side of the board
  53             #          14 15 16 17 18 19 20 21 22 23 24
  54              "         H9 D9 D8 B8 A9 B8 A8 B7 A7 B6 A6"
  55             # Bottom of the board
  56             # 25 26 27 28 29 30 31
  57              "G1 J3 J4 G9 J9 E8 J2"),
  58     ]
  59
  60     def toolchain_program(self, products, name):
  61         tinyprog = os.environ.get("TINYPROG", "tinyprog")
  62         with products.extract("{}.bin".format(name)) as bitstream_filename:
  63             subprocess.run([tinyprog, "-p", bitstream_filename], check=True)