Difference between revisions of "CSC270 Homework 4 Solution 2011"
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| − | For the last diagram, the design is correct, but could have been simplified | + | For the last diagram, the design is correct, but could have been simplified by setting the d input to 0 and leaving I8 to I15 unconnected (we use the symbol NC in diagrams to indicate the fact that an input or output is "not connected" to anything. |
| + | |||
| + | ==Code== | ||
| + | <code><pre> | ||
| + | # solution program for hw4 | ||
| + | # D. Thiebaut | ||
| + | # | ||
| + | def mux4To1( I0, I1, I2, I3, C0, C1 ): | ||
| + | inputs = ( I0, I1, I2, I3 ) | ||
| + | return inputs[ C0 + 2*C1 ] | ||
| + | |||
| + | def decode3To8( I0, I1, I2 ): | ||
| + | outputs = [0, 0, 0, 0, 0, 0, 0, 0] | ||
| + | outputs[ I0 + I1*2 + I2*4 ] = 1 | ||
| + | return outputs | ||
| + | |||
| + | def main(): | ||
| + | #--- verification of the majority voter --- | ||
| + | print "a b c | f " | ||
| + | print "------+---" | ||
| + | for a in [0,1]: | ||
| + | for b in [0,1]: | ||
| + | for c in [0,1]: | ||
| + | f = mux4To1( 0, c, c, 1, a, b ) | ||
| + | print "%d %d %d | %d" % ( a, b, c, f ) | ||
| + | |||
| + | |||
| + | main() | ||
| + | |||
| + | |||
| + | |||
| + | |||
| + | |||
| + | </pre></code> | ||
| + | |||
=Extra Credit= | =Extra Credit= | ||
