167 lines
9.1 KiB
HTML
167 lines
9.1 KiB
HTML
<?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>PUT</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 class="code">PUT</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_icon2e.gif" border="0" alt="BS2e icon" title="BS2e icon" />
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<img src="../../graphics/pgm_icon2sx.gif" border="0" alt="BS2sx icon" title="BS2sx icon" />
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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;"><a href="../ExampleTopics/GetPutEx.htm" target="" title="" alt="" class="MCXref_0" xrefformat="{paratext}">GET / PUT Examples</a>
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</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">Syntax: <span class="keyword_in_text">PUT</span> <![CDATA[ ]]><i>Location</i>, {<i>WORD</i>}<i> Value</i>{,<i><![CDATA[ ]]></i>{<i>WORD</i>}<i> Value ...</i>}</p>
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<h2>Function</h2>
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<p class="PlainText">Write one or more values to the Scratchpad RAM, starting at <i>Location</i> and
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building upward.
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</p>
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<ul>
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<li value="1"><b><i>Location</i></b> is a variable/constant/expression (0 – 62 for BS2e
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and BS2sx, and 0 – 126 for BS2p, BS2pe, and BS2px) that specifies the
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Scratchpad RAM location to write to.</li>
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<li value="2"><b><i>Value</i></b> is a variable/constant/expression to store
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in RAM.*</li>
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</ul>
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<p class="PlainText">*Note: The optional arguments require PBASIC 2.5.</p>
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<h2>Quick Facts</h2>
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<table width="100%" cellpadding="4" cellspacing="0" border="1">
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<tr>
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<td width="24%" align="center" bgcolor="#CFCFCF"> </td>
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<td width="38%" align="center" bgcolor="#CFCFCF">BS2e and BS2sx</td>
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<td width="38%" align="center" bgcolor="#CFCFCF">BS2p, BS2pe, and BS2px</td>
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</tr>
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<tr>
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<td align="center" bgcolor="#CFCFCF">Scratchpad RAM size and organization</td>
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<td align="center">64 bytes (0 – 63). Organized as bytes only.</td>
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<td align="center">136 bytes (0 – 135). Organized as bytes only.</td>
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</tr>
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<tr>
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<td align="center" bgcolor="#CFCFCF">General purpose locations</td>
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<td align="center">0 - 62</td>
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<td align="center">0 – 126</td>
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</tr>
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<tr>
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<td align="center" bgcolor="#CFCFCF">Special use location</td>
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<td align="center">Current program slot number in read-only location 63.</td>
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<td align="center">Current program slot number in lowest nibble of read-only location 127. Current read/write slot number in highest nibble of location 127. </td>
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</tr>
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<tr>
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<td align="center" bgcolor="#CFCFCF">Additional locations</td>
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<td align="center">None</td>
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<td align="center">Locations 128 - 135 (read-only) hold state of polled input pins.</td>
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</tr>
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<tr>
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<td align="center" bgcolor="#CFCFCF">Related Commands</td>
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<td align="center"><a href="GET.htm" target="" title="" alt="" class="MCXref_0" xrefformat="{paratext}">GET</a>
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</td>
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<td align="center"><a href="GET.htm" target="" title="" alt="" class="MCXref_0" xrefformat="{paratext}">GET</a>, <a href="STORE.htm" target="" title="" alt="" class="MCXref_0" xrefformat="{paratext}">STORE</a></td>
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</tr>
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<tr>
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<td align="center" bgcolor="#CFCFCF">PBASIC 2.5 Syntax Options</td>
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<td align="center" colspan="2">
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<p colspan="2" align="center">Multiple sequential variables may be read from the Scratchpad RAM. </p>
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<p colspan="2" align="center">The optional WORD modifier may be specified to retrieve 16-bit values.</p>
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</td>
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</tr>
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</table>
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<h2>Explanation</h2>
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<p class="PlainText">The <span class="keyword_in_text">PUT</span> command writes a value into the specified Scratchpad RAM location(s).
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All values in the general-purpose locations can be written to from within any of
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the eight program slots.</p>
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<p class="PlainText">Scratchpad RAM is useful for passing data to programs in other program slots
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and for additional workspace. It is different than regular RAM in that symbol
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names cannot be assigned directly to locations and each location is always
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configured as a byte only. The following code will write the value 100 to location
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25, read it back out with <span class="keyword_in_text">GET</span> and display it:</p>
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<p class="PlainText">The following example illustrates this:<br></br></p><pre class="BScode" xml:space="preserve">
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temp VAR Byte
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Main:
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PUT 25, 100
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GET 25, temp
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DEBUG DEC temp
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END
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</pre>
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<p class="PlainText">When using $PBASIC 2.5 syntax, Word-sized variables can be written to the
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Scratchpad RAM with a single <span class="keyword_in_text">PUT</span> statement, as well as multiple items to
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consecutive locations. The Word modifier writes the low-byte first, then the
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high-byte (<i>"Little Endian"</i>).</p>
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<p>
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<img src="../../graphics/bsesxppepx_inline.gif" border="0">
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</img>
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</p><pre class="BScode" xml:space="preserve">
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' {$PBASIC 2.5}
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value VAR Word
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value2 VAR Word
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addr VAR Word ' EEPROM address
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test VAR Byte ' test byte read back
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Main:
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value = $11
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value2 = $2003
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PUT 0, value, Word value2 ' write value to SP location 0
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' and value2 to SP locations 1 & 2
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value = $FF ' modify variables
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value2 = $FFFF
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GET 0, value, Word value2 ' retrieve from Scratchpad
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DEBUG HEX2 ? value ' display
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DEBUG HEX4 ? value2
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END
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</pre>
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<p class="PlainText">Most Scratchpad RAM locations are available for general use. The highest
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location (63 for BS2e/BS2sx and 127 for BS2p/BS2pe) is a special, read-only,
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location that always contains the number of the currently running program slot.
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On the BS2p/BS2pe, the upper nibble of location 127 also contains the current
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program slot that will be used for the <span class="keyword_in_text">READ</span> and <span class="keyword_in_text">WRITE</span> commands.
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Any values written to this location will be ignored.</p>
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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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