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import subprocess
from amaranth.vendor.gowin import GowinPlatform
from amaranth.build import *
from .resources import *
class TangNanoPlatform(GowinPlatform):
part = "GW1N-LV1QN48C6/I5"
family = "GW1N-1"
default_clk = "OSC"
osc_frequency = 24_000_000
resources = [
# This clock is shared with the USB-JTAG MCU and stops when the USB bus is suspended.
# It probably should not be used, but is included for completeness.
Resource("clk24", 0, Pins("35", dir="i"), Clock(24_000_000),
Attrs(IO_TYPE="LVCMOS33")),
RGBLEDResource(0, r="18", g="16", b="17",
attrs=Attrs(IO_TYPE="LVCMOS33")),
*ButtonResources(pins="15 14", invert=True,
attrs=Attrs(IO_TYPE="LVCMOS33")),
UARTResource(0, tx="9", rx="8",
attrs=Attrs(IO_TYPE="LVCMOS33", PULL_MODE="UP")),
*SPIFlashResources(0,
cs_n="19", clk="20", copi="22", cipo="23", wp_n="24", hold_n="25",
attrs=Attrs(IO_TYPE="LVCMOS33")),
Resource("lcd", 0,
Subsignal("clk", Pins("11", dir="o")),
Subsignal("hs", Pins("10", dir="o")),
Subsignal("vs", Pins("46", dir="o")),
Subsignal("de", Pins("5", dir="o")),
Subsignal("r", Pins("27 28 29 30 31", dir="o")),
Subsignal("g", Pins("32 33 34 38 39 40", dir="o")),
Subsignal("b", Pins("41 42 43 44 45", dir="o")),
Attrs(IO_TYPE="LVCMOS33")),
Resource("lcd_backlight", 0, Pins("47", dir="o"),
Attrs(IO_TYPE="LVCMOS33")),
]
connectors = []
def toolchain_prepare(self, fragment, name, **kwargs):
overrides = {
"add_options":
"set_option -use_mspi_as_gpio 1 -use_sspi_as_gpio 1",
"gowin_pack_opts":
"--sspi_as_gpio --mspi_as_gpio"
}
return super().toolchain_prepare(fragment, name, **overrides, **kwargs)
def toolchain_program(self, products, name):
with products.extract("{}.fs".format(name)) as bitstream_filename:
subprocess.check_call(["openFPGALoader", "-b", "tangnano",
bitstream_filename])
if __name__ == "__main__":
from .test.blinky import *
TangNanoPlatform().build(Blinky(), do_program=True)
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