28 lines
899 B
Python
28 lines
899 B
Python
from migen.fhdl.std import *
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from migen.genlib.cdc import MultiReg
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from migen.bank.description import *
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class GPIOIn(Module, AutoCSR):
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def __init__(self, signal):
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self._in = CSRStatus(flen(signal))
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self.specials += MultiReg(signal, self._in.status)
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class GPIOOut(Module, AutoCSR):
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def __init__(self, signal):
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self._out = CSRStorage(flen(signal))
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self.comb += signal.eq(self._out.storage)
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class GPIOInOut(Module):
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def __init__(self, in_signal, out_signal):
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self.submodules.gpio_in = GPIOIn(in_signal)
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self.submodules.gpio_out = GPIOOut(out_signal)
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def get_csrs(self):
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return self.gpio_in.get_csrs() + self.gpio_out.get_csrs()
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class Blinker(Module):
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def __init__(self, signal, divbits=26):
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counter = Signal(divbits)
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self.comb += signal.eq(counter[divbits-1])
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self.sync += counter.eq(counter + 1)
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