| PC.ParallelGet | Part of PC module |
| Syntax | PC.ParallelGet (port : int) : nat1
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| Description | The PC.ParallelGet function is used to read the value of certain pins on a parallel port. The port is specified with the port parameter which can have the value 1, 2 or 3 corresponding to "LPT1", "LPT2" and "LPT3". This procedure can be used to control robots and peripherals.
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| Example | This program reads and prints the values of the five data pins of the PC's parallel port.
% Read in the set of pin values from LPT1
const val : int := PC.ParallelGet (1)
put "Pin 10 is: ", (val div 64) mod 2
put "Pin 11 is: ", (val div 128) mod 2
put "Pin 12 is: ", (val div 32) mod 2
put "Pin 13 is: ", (val div 16) mod 2
put "Pin 15 is: ", (val div 8) mod 2
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| Details | The five pins that are used for parallel input are pins 10-15. The PC.ParallelGet procedure returns the sum of
The mod and div operators can be used to determine which pins are high or low.
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| Status | Exported qualified. This means that you can only call the function by calling PC.ParallelGet, not by calling ParallelGet.
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| See also | PC.ParallelPut procedure for a diagram of the pins. That procedure is used to set the values on the parallel port.
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