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38 lines
797 B
Python
38 lines
797 B
Python
from __future__ import generators
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from myhdl import Signal, Simulation, delay, always_comb
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def mux(z, a, b, sel):
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""" Multiplexer.
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z -- mux output
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a, b -- data inputs
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sel -- control input: select a if asserted, otherwise b
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"""
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def muxlogic():
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if sel == 1:
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z.next = a
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else:
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z.next = b
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return always_comb(muxlogic)
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from random import randrange
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(z, a, b, sel) = [Signal(0) for i in range(4)]
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MUX_1 = mux(z, a, b, sel)
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def test():
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print "z a b sel"
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for i in range(8):
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a.next, b.next, sel.next = randrange(8), randrange(8), randrange(2)
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yield delay(10)
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print "%s %s %s %s" % (z, a, b, sel)
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def main():
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Simulation(MUX_1, test()).run()
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if __name__ == '__main__':
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main()
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