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<H2>
Module SPI</H2>
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SPI.asm Jan Ornter DATE: 11-9-2005 VER.: 1.0 This class provides functions for the modified physical SPI-Layer
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<CODE> </CODE></FONT></TD>
<TD><CODE><B><A HREF="SPI.html#SPI.BufferH">SPI.BufferH</A></B></CODE>
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Stores the most significant Byte</TD>
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<CODE> </CODE></FONT></TD>
<TD><CODE><B><A HREF="SPI.html#SPI.BufferL">SPI.BufferL</A></B></CODE>
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Stores the least significant Byte</TD>
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<CODE></CODE></FONT></TD>
<TD><CODE><B><A HREF="SPI.html#SPI.Init">SPI.Init</A></B>()</CODE>
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This macro initialises the SPI module</TD>
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<CODE> SPI.BufferH SPI.BufferL </CODE></FONT></TD>
<TD><CODE><B><A HREF="SPI.html#SPI.Read">SPI.Read</A></B>( SPI.BufferH SPI.BufferL )</CODE>
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This macro reads two Bytes from the SPI-Bus.</TD>
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<CODE></CODE></FONT></TD>
<TD><CODE><B><A HREF="SPI.html#SPI.Write">SPI.Write</A></B>( SPI.BufferH SPI.BufferL )</CODE>
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This macro shifts data out of the MCU through the SPI-Interface.</TD>
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<A NAME="SPI.BufferH"></A><H3>
SPI.BufferH</H3>
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<DD> Stores the most significant Byte
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</DL>
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<A NAME="SPI.BufferL"></A><H3>
SPI.BufferL</H3>
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<DD> Stores the least significant Byte
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<A NAME="SPI.Init"></A><H3>
SPI.Init</H3>
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<B>SPI.Init</B>()</PRE>
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<DD> This macro initialises the SPI module
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<A NAME="SPI.Read"></A><H3>
SPI.Read</H3>
<PRE>
SPI.BufferH SPI.BufferL <B>SPI.Read</B>( SPI.BufferH SPI.BufferL )</PRE>
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<DD> This macro reads two Bytes from the SPI-Bus. Put the Read command and the address in the SPI.BufferH and SPI.BufferL Registers. Then call SPI.Read. Then read the returned values in SPI.BufferH and SPI.BufferL.
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<DD><DL>
<DT><B>Parameters:</B>
<DD><CODE>SPI.BufferH</CODE> - The most significant Byte of the Data </DD>
<DD><CODE>SPI.BufferL</CODE> - The least significant Byte of the Data </DD>
</DL></DD>
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<DT><B>Returns:</B>
<DD><CODE>SPI.BufferH</CODE> - The most significant Byte of the Data </DD>
<DD><CODE>SPI.BufferL</CODE> - The least significant Byte of the Data </DD>
</DL></DD>
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<DD><DL>
<DT><B>Stacklevel:</B><DD>1</DD></DL>
</DD>
<DD><DL>
<DT><B>Status:</B><DD> Tested</DD></DL>
</DD>
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<DD><DL>
<DT><B>Example:</B><DD><CODE><TABLE BORDER="0"><TR> <TD><CODE> </CODE></TD> <TD><CODE><FONT COLOR="#0000FF">pagesel </FONT></CODE></TD> <TD><CODE><FONT COLOR="#AA22AA">SPI.BufferH </FONT></CODE></TD></TR><TR> <TD><CODE> </CODE></TD> <TD><CODE><FONT COLOR="#0000FF"><B>movlw </B></FONT></CODE></TD> <TD><CODE><FONT COLOR="#AA22AA">0xf0 </FONT></CODE></TD></TR><TR> <TD><CODE> </CODE></TD> <TD><CODE><FONT COLOR="#0000FF"><B>movwf </B></FONT></CODE></TD> <TD><CODE><FONT COLOR="#AA22AA">SPI.BufferH </FONT></CODE></TD></TR><TR> <TD><CODE> </CODE></TD> <TD><CODE><FONT COLOR="#0000FF"><B>movlw </B></FONT></CODE></TD> <TD><CODE><FONT COLOR="#AA22AA">0x0f </FONT></CODE></TD></TR><TR> <TD><CODE> </CODE></TD> <TD><CODE><FONT COLOR="#0000FF"><B>movwf </B></FONT></CODE></TD> <TD><CODE><FONT COLOR="#AA22AA">SPI.BufferL </FONT></CODE></TD></TR><TR> <TD><CODE> </CODE></TD> <TD><CODE><FONT COLOR="#0000FF"><B>call </B></FONT></CODE></TD> <TD><CODE><FONT COLOR="#AA22AA">SPI.Read </FONT></CODE></TD></TR></TABLE></CODE></DD></DL>
</DD>
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<DT><B>Description:</B><DD> This sends 0xf00f over the SPI-Bus, and reads the answer to SPI.BufferH and SPI.BufferL.</DD></DL>
</DD>
</DL>
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<A NAME="SPI.Write"></A><H3>
SPI.Write</H3>
<PRE>
<B>SPI.Write</B>( SPI.BufferH SPI.BufferL )</PRE>
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<DL>
<DD> This macro shifts data out of the MCU through the SPI-Interface.
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<DD><DL>
<DT><B>Parameters:</B>
<DD><CODE>SPI.BufferH</CODE> - The most significant Byte of the Data </DD>
<DD><CODE>SPI.BufferL</CODE> - The least significant Byte of the Data </DD>
</DL></DD>
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<DD><DL>
<DT><B>Stacklevel:</B><DD>1</DD></DL>
</DD>
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<DT><B>Status:</B><DD> Tested</DD></DL>
</DD>
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<DD><DL>
<DT><B>Example:</B><DD><CODE><TABLE BORDER="0"><TR> <TD><CODE> </CODE></TD> <TD><CODE><FONT COLOR="#0000FF">pagesel </FONT></CODE></TD> <TD><CODE><FONT COLOR="#AA22AA">SPI.BufferH </FONT></CODE></TD></TR><TR> <TD><CODE> </CODE></TD> <TD><CODE><FONT COLOR="#0000FF"><B>movlw </B></FONT></CODE></TD> <TD><CODE><FONT COLOR="#AA22AA">0xf0 </FONT></CODE></TD></TR><TR> <TD><CODE> </CODE></TD> <TD><CODE><FONT COLOR="#0000FF"><B>movwf </B></FONT></CODE></TD> <TD><CODE><FONT COLOR="#AA22AA">SPI.BufferH </FONT></CODE></TD></TR><TR> <TD><CODE> </CODE></TD> <TD><CODE><FONT COLOR="#0000FF"><B>movlw </B></FONT></CODE></TD> <TD><CODE><FONT COLOR="#AA22AA">0x0f </FONT></CODE></TD></TR><TR> <TD><CODE> </CODE></TD> <TD><CODE><FONT COLOR="#0000FF"><B>movwf </B></FONT></CODE></TD> <TD><CODE><FONT COLOR="#AA22AA">SPI.BufferL </FONT></CODE></TD></TR><TR> <TD><CODE> </CODE></TD> <TD><CODE><FONT COLOR="#0000FF"><B>call </B></FONT></CODE></TD> <TD><CODE><FONT COLOR="#AA22AA">SPI.Write </FONT></CODE></TD></TR></TABLE></CODE></DD></DL>
</DD>
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<DT><B>Description:</B><DD> This sends 0xf00f over the SPI-Bus</DD></DL>
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