import os
import subprocess

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


__all__ = ["ICEBreakerPlatform"]


class ICEBreakerPlatform(LatticeICE40Platform):
    device      = "iCE40UP5K"
    package     = "SG48"
    default_clk = "clk12"
    resources   = [
        Resource("clk12", 0, Pins("35", dir="i"),
                 Clock(12e6), Attrs(GLOBAL=True, IO_STANDARD="SB_LVCMOS")),

        *LEDResources(pins="11 37", invert=True, attrs=Attrs(IO_STANDARD="SB_LVCMOS")),
        # Semantic aliases
        Resource("led_r", 0, PinsN("11", dir="o"), Attrs(IO_STANDARD="SB_LVCMOS")),
        Resource("led_g", 0, PinsN("37", dir="o"), Attrs(IO_STANDARD="SB_LVCMOS")),

        *ButtonResources(pins="10", invert=True, attrs=Attrs(IO_STANDARD="SB_LVCMOS")),

        UARTResource(0,
            rx="6", tx="9",
            attrs=Attrs(IO_STANDARD="SB_LVTTL", PULLUP=1)
        ),

        *SPIFlashResources(0,
            cs="16", clk="15", copi="14", cipo="17", wp="12", hold="13",
            attrs=Attrs(IO_STANDARD="SB_LVCMOS")
        ),
    ]
    connectors = [
        Connector("pmod", 0, " 4  2 47 45 - -  3 48 46 44 - -"),  # PMOD1A
        Connector("pmod", 1, "43 38 34 31 - - 42 36 32 28 - -"), # PMOD1B
        Connector("pmod", 2, "27 25 21 19 - - 26 23 20 18 - -"), # PMOD2
    ]
    # The attached LED/button section can be either used standalone or as a PMOD.
    # Attach to platform using:
    # p.add_resources(p.break_off_pmod)
    # pmod_btn = plat.request("user_btn")
    break_off_pmod = [
        *LEDResources(pins={2: "7", 3: "1", 4: "2", 5: "8", 6: "3"}, conn=("pmod", 2),
                      attrs=Attrs(IO_STANDARD="SB_LVCMOS")),
        # Semantic aliases
        Resource("led_r", 1, Pins("7", dir="o", conn=("pmod", 2)),
                 Attrs(IO_STANDARD="SB_LVCMOS")),
        Resource("led_g", 1, Pins("1", dir="o", conn=("pmod", 2)),
                 Attrs(IO_STANDARD="SB_LVCMOS")),
        Resource("led_g", 2, Pins("2", dir="o", conn=("pmod", 2)),
                 Attrs(IO_STANDARD="SB_LVCMOS")),
        Resource("led_g", 3, Pins("8", dir="o", conn=("pmod", 2)),
                 Attrs(IO_STANDARD="SB_LVCMOS")),
        Resource("led_g", 4, Pins("3", dir="o", conn=("pmod", 2)),
                 Attrs(IO_STANDARD="SB_LVCMOS")),

        *ButtonResources(pins={1: "9", 2: "4", 3: "10"}, conn=("pmod", 2),
                         attrs=Attrs(IO_STANDARD="SB_LVCMOS")),
    ]

    def toolchain_program(self, products, name):
        iceprog = os.environ.get("ICEPROG", "iceprog")
        with products.extract("{}.bin".format(name)) as bitstream_filename:
            subprocess.check_call([iceprog, bitstream_filename])


if __name__ == "__main__":
    from .test.blinky import *
    p = ICEBreakerPlatform()
    p.add_resources(p.break_off_pmod)
    p.build(Blinky(), do_program=True)
