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35 lines
756 B
Python
35 lines
756 B
Python
from __future__ import generators
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from myhdl import Signal, delay, Simulation, intbv, bin
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def bin2gray(width, B, G):
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""" Gray encoder.
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width -- bit width
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B -- input intbv signal, binary encoded
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G -- output intbv signal, gray encoded
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"""
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while 1:
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yield B
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for i in range(width):
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G.next[i] = B[i+1] ^ B[i]
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def testBench(width):
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B = Signal(intbv(0))
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G = Signal(intbv(0))
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dut = bin2gray(width, B, G)
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def stimulus():
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for i in range(2**width):
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B.next = intbv(i)
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yield delay(10)
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print "B: " + bin(B, width) + "| G: " + bin(G, width)
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return (dut, stimulus())
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if __name__ == '__main__':
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Simulation(testBench(width=3)).run()
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