alchitry_cu.py

import os
import subprocess

from nmigen.build import *
from nmigen.vendor.lattice_ice40 import *
from .resources import *


__all__ = ["AlchitryCuPlatform"]


class AlchitryCuPlatform(LatticeICE40Platform):
    device      = "iCE40HX8K"
    package     = "CB132"
    default_clk = "clk12"
    resources   = [
        Resource("clk12", 0, Pins("J3", dir="i"),
                 Clock(12e6), Attrs(GLOBAL=True, IO_STANDARD="SB_LVCMOS")),

        *LEDResources(
            pins="J11 K11 K12 K14 L12 L14 M12 N14",
            attrs=Attrs(IO_STANDARD="SB_LVCMOS")
        ),

        UARTResource(0,
            rx="M9", tx="P14",
            attrs=Attrs(IO_STANDARD="SB_LVCMOS", PULLUP=1),
            role="dce"
        ),

        *SPIFlashResources(0,
            cs_n="P13", clk="P12", copi="M11", cipo="P11",
            attrs=Attrs(IO_STANDARD="SB_LVCMOS")
        ),
    ]
    connectors  = [
        # TODO
    ]

    def toolchain_program(self, products, name):
        iceprog = os.environ.get("ICEPROG", "iceprog")
        with products.extract("{}.bin".format(name)) as bitstream_filename:
            # TODO: this should be factored out and made customizable
            subprocess.check_call([iceprog, "-S", bitstream_filename])


if __name__ == "__main__":
    from .test.blinky import *
    AlchitryCuPlatform().build(Blinky(), do_program=True)

error.txt

keegan@chlorophyllum:~/fpga-tools/nmigen/examples/board$ PYTHONPATH=~/fpga-tools/nmigen:~/fpga-tools/nmigen-boards python3 ./01_blinky.py 
ERROR: BEL 'X0/Y18/io1' has no global buffer connection available
ERROR: Packing design failed.
0 warnings, 2 errors
Traceback (most recent call last):
  File "./01_blinky.py", line 21, in <module>
    platform.build(Blinky(), do_program=True)
  File "/home/keegan/fpga-tools/nmigen/nmigen/build/plat.py", line 99, in build
    products = plan.execute_local(build_dir)
  File "/home/keegan/fpga-tools/nmigen/nmigen/build/run.py", line 98, in execute_local
    subprocess.check_call(["sh", "{}.sh".format(self.script)])
  File "/usr/lib/python3.7/subprocess.py", line 347, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['sh', 'build_top.sh']' returned non-zero exit status 255.