117 lines
5.5 KiB
HTML
117 lines
5.5 KiB
HTML
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<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns:MadCap="http://www.madcapsoftware.com/Schemas/MadCap.xsd" MadCap:lastBlockDepth="6" MadCap:lastHeight="94" MadCap:lastWidth="853" MadCap:disableMasterStylesheet="true" MadCap:tocPath="" MadCap:InPreviewMode="false" MadCap:PreloadImages="false" MadCap:RuntimeFileType="Topic" MadCap:TargetType="WebHelp" lang="en-us" xml:lang="en-us" MadCap:PathToHelpSystem="../../../" MadCap:HelpSystemFileName="Default.xml" MadCap:SearchType="Stem">
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<head><title>POLLIN / POLLOUT / POLLMODE Example</title>
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<link href="../../SkinSupport/MadCap.css" rel="stylesheet" />
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<link href="../../Resources/Stylesheets/BSE_Help.css" rel="stylesheet" />
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<script src="../../SkinSupport/MadCapAll.js" type="text/javascript">
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</script>
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</head>
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<body>
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<h1>POLLIN / POLLOUT / POLLMODE Example</h1>
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<div class="ImagePlusCaption">
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<div class="Col2">
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<p>
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<img src="../../graphics/pgm_icon2p.gif" border="0" alt="BS2p icon" title="BS2p icon" />
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<img src="../../graphics/pgm_icon2pe.gif" border="0" alt="BS2pe icon" title="BS2pe icon" />
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<img src="../../graphics/pgm_icon2px.gif" border="0" alt="BS2px icon" title="BS2px icon" />
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</p>
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</div>
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<p style="text-align: right;">Syntax:<a href="../Commands/POLLIN.htm" target="" title="" alt="" class="MCXref_0" xrefformat="{paratext}">POLLIN</a>, <a href="../Commands/POLLOUT.htm" target="" title="" alt="" class="MCXref_0" xrefformat="{paratext}">POLLOUT</a>, <a href="../Commands/POLLMODE.htm" target="" title="" alt="" class="MCXref_0" xrefformat="{paratext}">POLLMODE</a></p>
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<p> </p>
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</div>
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<p class="clear"> </p>
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<p> </p>
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<p class="PlainText" style="text-align: center;">
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<img src="../../graphics/pollin_sch.gif" />
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</p>
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<p>NOTE: This is written for the BS2p and will also run on the BS2pe and BS2px. Modify the $STAMP directive (as required) before downloading to the BS2pe or BS2px.</p><pre class="BScode" xml:space="preserve">' POLL.BSP
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' This program demonstrates POLLIN, POLLOUT, and the use of the POLLMODE
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' instruction. Connect active-low inputs to pins 0, 1, 2, and 3. Then
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' connect an LED to pin 7. The program will print "." to the Debug
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' window until one of the alarm buttons are pressed. This will cause
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' the termination of the main loop. At this point the program will
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' save the latched bits, clear them (and the polling process), then
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' report the input(s) that triggered the alarm.
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' {$STAMP BS2p}
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' {$PBASIC 2.5}
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FDoor PIN 0
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BDoor PIN 1
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Patio PIN 2
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Rst PIN 3
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AlarmLed PIN 7
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alarms VAR Byte ' alarm bits
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idx VAR Nib ' loop control
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Setup:
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POLLIN FDoor, 0 ' define alarm inputs
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POLLIN BDoor, 0
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POLLIN Patio, 0
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POLLOUT AlarmLed, 1 ' alarm indicator
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POLLMODE 10 ' activate latched polling
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DEBUG CLS,
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"Alarms Activated", CR
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Main:
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DO
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DEBUG "." ' foreground activity
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PAUSE 50
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LOOP UNTIL (AlarmLed = 1) ' loop until LED is on
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GET 128, alarms ' get alarm bits
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POLLMODE 0 ' deactivate polling
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Report:
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DEBUG CLS, ' alarms report
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"Front Door : ", CR,
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"Back Door : ", CR,
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"Patio : ", CR
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FOR idx = 0 TO 2 ' scan alarm bits
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DEBUG CRSRXY, 13, idx ' move cursor
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IF (alarms.LOWBIT(idx)) THEN ' report each bit status
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DEBUG "Alarm", CR
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ELSE
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DEBUG "-", CR
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ENDIF
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NEXT
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DEBUG CR, "Press RESET to clear..."
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DO : LOOP UNTIL (Rst = 0) ' wait until Rst pressed
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GOTO Setup
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END
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</pre>
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<div class="Col2">
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<div class="MasterFoot">
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<p MadCap:conditions="BSEconditions.BSEWebHelp (Primary)-INCLUDE"><a href="../../HomeTopics/HomePage.htm">Go to Welcome page</a>
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</p>
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</div>
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</div>
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<div class="Col2">
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<div class="MasterFoot">
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<p style="text-align: right;"><span class="ContactInfoProjectName">BASIC Stamp Help</span> <![CDATA[ ]]><span class="ContactInfoVersion#">Version 2.5.4</span> <![CDATA[ ]]></p>
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<p style="text-align: right;">Copyright © <span class="ContactInfoCompanyName">Parallax Inc.</span></p>
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<p style="text-align: right;"><span class="SystemShortDate">8/8/2012</span>
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</p>
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</div>
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</div>
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