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It's a long way to go from switch on test board to parallel
port, processed, parallel port to test board and have LED turn on.
Just having hardware switch which people touch and the LED feedback
makes the learning more fun for me and hopefully others.
Use input pin 15 of lpt0, lpt1 for logic in A & B and pin
17 of lpt2 for X in the following:
#Write scripts for SI/OP to emulate standard logic gates via ports
input(s) and output.
#AND_gate.sh
#!/bin/bash
while true ; do
VALUE_A=`cat /home/siop/port0/pin15`
VALUE_B=`cat /home/siop/port1/pin15`
VALUE_X=2
if [ $((VALUE_A+VALUE_B)) = $VALUE_X ] ; then
echo "1" > /home/siop/port2/pin17
else
echo "0" > /home/siop/port2/pin17
fi
sleep .5
done
#NAND_gate.sh
#!/bin/bash
while true ; do
VALUE_A=`cat /home/siop/port0/pin15`
VALUE_B=`cat /home/siop/port1/pin15`
VALUE_X=2
if [ $((VALUE_A+VALUE_B)) = $VALUE_X ] ; then
echo "0" > /home/siop/port2/pin17
else
echo "1" > /home/siop/port2/pin17
fi
sleep .5
done
#OR_gate.sh
#!/bin/bash
while true ; do
VALUE_A=`cat /home/siop/port0/pin15`
VALUE_B=`cat /home/siop/port1/pin15`
VALUE_X=0
if [ $((VALUE_A+VALUE_B)) = $VALUE_X] ; then
echo "0" > /home/siop/port2/pin17
else
echo "1" > /home/siop/port2/pin17
fi
sleep .5
done
#NOR_gate.sh
#!/bin/bash
while true ; do
VALUE_A=`cat /home/siop/port0/pin15`
VALUE_B=`cat /home/siop/port1/pin15`
VALUE_X=0
if [ $((VALUE_A+VALUE_B)) = $VALUE_X ] ; then
echo "1" > /home/siop/port2/pin17
else
echo "0" > /home/siop/port2/pin17
fi
sleep .5
done
#XOR_gate.sh
#!/bin/bash
while true ; do
VALUE_A=`cat /home/siop/port0/pin15`
VALUE_B=`cat /home/siop/port1/pin15`
VALUE_X=1
if [ $((VALUE_A+VALUE_B)) = $VALUE_X ] ; then
echo "1" > /home/siop/port2/pin17
else
echo "0" > /home/siop/port2/pin17
fi
sleep .5
done
#Inverter
#!/bin/bash
while true ; do
VALUE_A=`cat /home/siop/port0/pin15`
VALUE_X=0
if [ $VALUE_A = $VALUE_X ] ; then
echo "1" > /home/siop/port2/pin17
else
echo "0" > /home/siop/port2/pin17
fi
sleep .5
done