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<h1>INPUT / OUTPUT Examples</h1>
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<p style="text-align: right;">Syntax: <a href="../Commands/INPUT.htm" target="" title="" alt="" class="MCXref_0" xrefformat="{paratext}">INPUT</a>, <a href="../Commands/OUTPUT.htm" target="" title="" alt="" class="MCXref_0" xrefformat="{paratext}">OUTPUT</a></p>
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<p> </p><pre class="BScode" xml:space="preserve">' INPUT_OUTPUT.BS1
' This program demonstrates how the input/output direction of a pin is
' determined by the corresponding bit of DIRS. It also shows that the
' state of the pin itself (as reflected by the corresponding bit of PINS)
' is determined by the outside world when the pin is an input, and by the
' corresponding bit of PINS when it's an output. To set up the demo,
' connect a 10k resistor from +5V to P7 on the BASIC Stamp. The resistor
' to +5V puts a high (1) on the pin when it's an input. The BASIC Stamp
' can override this state by writing a low (0) to bit 7 of OUTS and
' changing the pin to output.
' {$STAMP BS1}
' {$PBASIC 1.0}
Main:
INPUT 7 ' Make P7 an input
DEBUG "State of P7: ", #PIN7, CR
PIN7 = 0 ' Write 0 to output latch
DEBUG "After 0 written to OUT7: "
DEBUG #PIN7, CR
OUTPUT 7 ' Make P7 an output
DEBUG "After P7 changed to output: "
DEBUG #PIN7
END
</pre>
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<p>NOTE: The example below is written for the BS2 and will run on any of the BS2-family modules. Modify the $STAMP directive (as required) before downloading to the BS2e, BS2sx, BS2p, BS2pe, or BS2px.</p><pre class="BScode" xml:space="preserve">' INPUT_OUTPUT.BS2
' This program demonstrates how the input/output direction of a pin is
' determined by the corresponding bit of DIRS. It also shows that the
' state of the pin itself (as reflected by the corresponding bit of PINS)
' is determined by the outside world when the pin is an input, and by the
' corresponding bit of PINS when it's an output. To set up the demo,
' connect a 10k resistor from +5V to P7 on the BASIC Stamp. The resistor
' to +5V puts a high (1) on the pin when it's an input. The BASIC Stamp
' can override this state by writing a low (0) to bit 7 of OUTS and
' changing the pin to output.
' {$STAMP BS2}
' {$PBASIC 2.5}
Main:
INPUT 7 ' Make P7 an input
DEBUG "State of P7: ",
BIN1 IN7, CR
OUT7 = 0 ' Write 0 to output latch
DEBUG "After 0 written to OUT7: ",
BIN1 IN7, CR
OUTPUT 7 ' Make P7 an output
DEBUG "After P7 changed to output: ",
BIN1 IN7
END
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<p style="text-align: right;"><span class="SystemShortDate">8/8/2012</span>
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