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from nmigen.build import *
__all__ = ["SPIResource"]
def SPIResource(*args, cs, clk, mosi, miso, int=None, reset=None, attrs=None, role="host"):
assert role in ("host", "device")
io = []
if role == "host":
io.append(Subsignal("cs", PinsN(cs, dir="o")))
io.append(Subsignal("clk", Pins(clk, dir="o", assert_width=1)))
io.append(Subsignal("mosi", Pins(mosi, dir="o", assert_width=1)))
io.append(Subsignal("miso", Pins(miso, dir="i", assert_width=1)))
else: # device
io.append(Subsignal("cs", PinsN(cs, dir="i", assert_width=1)))
io.append(Subsignal("clk", Pins(clk, dir="i", assert_width=1)))
io.append(Subsignal("mosi", Pins(mosi, dir="i", assert_width=1)))
io.append(Subsignal("miso", Pins(miso, dir="oe", assert_width=1)))
if int is not None:
if role == "host":
io.append(Subsignal("int", Pins(int, dir="i")))
else:
io.append(Subsignal("int", Pins(int, dir="oe", assert_width=1)))
if reset is not None:
if role == "host":
io.append(Subsignal("reset", Pins(reset, dir="o")))
else:
io.append(Subsignal("reset", Pins(reset, dir="i", assert_width=1)))
if attrs is not None:
io.append(attrs)
return Resource.family(*args, default_name="spi", ios=io)
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