cs8900_8c-source.html

单片机的软件

00165     cs8900WriteReg(PP_IA+0, (CS8900_MAC1<<8) + CS8900_MAC0 );
00166     cs8900WriteReg(PP_IA+2, (CS8900_MAC3<<8) + CS8900_MAC2 );
00167     cs8900WriteReg(PP_IA+4, (CS8900_MAC5<<8) + CS8900_MAC4 );
00168     <span class="comment">// configure the Physical Interface</span>
00169     cs8900WriteReg(PP_LineCTL, SERIAL_RX_ON | SERIAL_TX_ON);
00170     cs8900WriteReg(PP_RxCTL, RX_OK_ACCEPT | RX_IA_ACCEPT | RX_BROADCAST_ACCEPT );
00171 }
00172 
00173 <span class="keywordtype">void</span> cs8900Write(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> address, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> data)
00174 {
00175     <span class="comment">// assert the address</span>
00176     outb(CS8900_ADDRESS_PORT, address | (inb(CS8900_ADDRESS_PORT)&amp;~CS8900_ADDRESS_MASK));
00177     <span class="comment">// set data bus as output</span>
00178     outb(CS8900_DATA_DDR, 0xFF);
00179     <span class="comment">// place data on bus</span>
00180     outb(CS8900_DATA_PORT, data);
00181     <span class="comment">// clock write pin</span>
00182     cbi(CS8900_CONTROL_PORT, CS8900_CONTROL_WRITEPIN);
00183     nop();
00184     nop();
00185     nop();
00186     nop();
00187     sbi(CS8900_CONTROL_PORT, CS8900_CONTROL_WRITEPIN);
00188     <span class="comment">// set data bus back to input with pullups enabled</span>
00189     outb(CS8900_DATA_DDR, 0x00);
00190     outb(CS8900_DATA_PORT, 0xFF);
00191 }
00192 
00193 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> cs8900Read(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> address)
00194 {
00195     <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> data;
00196     <span class="comment">// assert the address</span>
00197     outb(CS8900_ADDRESS_PORT, address | (inb(CS8900_ADDRESS_PORT)&amp;~CS8900_ADDRESS_MASK));
00198     <span class="comment">// set data bus to input with pullups enabled</span>
00199     outb(CS8900_DATA_DDR, 0x00);
00200     outb(CS8900_DATA_PORT, 0xFF);
00201     <span class="comment">// assert read</span>
00202     cbi(CS8900_CONTROL_PORT, CS8900_CONTROL_READPIN);
00203     nop();
00204     nop();
00205     nop();
00206     nop();
00207     <span class="comment">// read in the data</span>
00208     data = inb( CS8900_DATA_PIN );
00209     <span class="comment">// negate read</span>
00210     sbi(CS8900_CONTROL_PORT, CS8900_CONTROL_READPIN);
00211     <span class="comment">// return data</span>
00212     <span class="keywordflow">return</span> data;
00213 }
00214 
00215 <span class="keywordtype">void</span> cs8900Write16(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> address, <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> data)
00216 {
00217     cs8900Write(address+0, data);   
00218     cs8900Write(address+1, data&gt;&gt;8);    
00219 }
00220 
00221 <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> cs8900Read16(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> address)
00222 {
00223     <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> data;
00224     data =  cs8900Read(address+0);
00225     data |= cs8900Read(address+1)&lt;&lt;8;
00226     <span class="keywordflow">return</span> data;
00227 }
00228 
00229 <span class="comment">// writes a word in little-endian byte order to a specified PacketPage address</span>
00230 <span class="keywordtype">void</span> cs8900WriteReg(<span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> address, <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> data)
00231 {
00232     cs8900Write16(CS8900_IO_PP_PTR, address);
00233     cs8900Write16(CS8900_IO_PP_DATA_PORT0, data);
00234 }
00235 
00236 <span class="comment">// reads a word in little-endian byte order from a specified PacketPage address</span>
00237 <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> cs8900ReadReg(<span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> address)
00238 {
00239     cs8900Write16(CS8900_IO_PP_PTR, address);
00240     <span class="keywordflow">return</span> cs8900Read16(CS8900_IO_PP_DATA_PORT0);
00241 }
00242 
00243 <span class="comment">// copies bytes from MCU-memory to frame port</span>
00244 <span class="comment">// NOTES: * an odd number of byte may only be transfered</span>
00245 <span class="comment">//          if the frame is written to the end!</span>
00246 <span class="comment">//        * MCU-memory MUST start at word-boundary</span>
00247 
00248 <span class="keywordtype">void</span> cs8900CopyToFrame(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *source, <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> size)
00249 {
00250     <span class="keywordflow">while</span>(size&gt;1)
00251     {
00252         cs8900Write16(CS8900_IO_RXTX_DATA_PORT0, *((<span class="keywordtype">unsigned</span> <span class="keywordtype">short</span>*)source));
00253         source += 2;
00254         size -= 2;
00255     }
00256     <span class="comment">// if odd num. of bytes...</span>
00257     <span class="comment">// write leftover byte (the LAN-controller ignores the highbyte)</span>
00258     <span class="keywordflow">if</span>(size)
00259         cs8900Write16(CS8900_IO_RXTX_DATA_PORT0, *(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>*)source);
00260 }
00261 
00262 <span class="comment">// copies bytes from frame port to MCU-memory</span>
00263 <span class="comment">// NOTES: * an odd number of byte may only be transfered</span>
00264 <span class="comment">//          if the frame is read to the end!</span>
00265 <span class="comment">//        * MCU-memory MUST start at word-boundary</span>
00266 
00267 <span class="keywordtype">void</span> cs8900CopyFromFrame(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *dest, <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> size)
00268 {
00269     <span class="keywordflow">while</span>(size&gt;1)
00270     {
00271         *((<span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> *)dest) = cs8900Read16(CS8900_IO_RXTX_DATA_PORT0);
00272         dest += 2;
00273         size -= 2;
00274     }
00275   
00276     <span class="comment">// check for leftover byte...</span>
00277     <span class="comment">// the LAN-Controller will return 0 for the highbyte</span>
00278     <span class="keywordflow">if</span>(size)    
00279         *(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *)dest = cs8900Read16(CS8900_IO_RXTX_DATA_PORT0);
00280 }
00281 
00282 <span class="keywordtype">void</span> cs8900IORegDump(<span class="keywordtype">void</span>)
00283 {
00284     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"CS8900 I/O Registers\r\n"</span>);
00285     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">" FRAME   ISQ  ADDR DATA0 DATA1\r\n"</span>);
00286     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"-------------------------------\r\n"</span>);
00287     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"  "</span>);
00288     <a class="code" href="group__rprintf.html#ga8">rprintfu16</a>(cs8900Read16(CS8900_IO_RXTX_DATA_PORT0));
00289     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"  "</span>);
00290     <a class="code" href="group__rprintf.html#ga8">rprintfu16</a>(cs8900Read16(CS8900_IO_ISQ));
00291     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"  "</span>);
00292     <a class="code" href="group__rprintf.html#ga8">rprintfu16</a>(cs8900Read16(CS8900_IO_PP_PTR));
00293     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"  "</span>);
00294     <a class="code" href="group__rprintf.html#ga8">rprintfu16</a>(cs8900Read16(CS8900_IO_PP_DATA_PORT0));
00295     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"  "</span>);
00296     <a class="code" href="group__rprintf.html#ga8">rprintfu16</a>(cs8900Read16(CS8900_IO_PP_DATA_PORT1));
00297     <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
00298 }
00299 
00300 <span class="keywordtype">void</span> cs8900RegDump(<span class="keywordtype">void</span>)
00301 {
00302     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"CS8900 PacketPage Registers\r\n"</span>);
00303     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"CHIP ID: "</span>);
00304     <a class="code" href="group__rprintf.html#ga8">rprintfu16</a>(cs8900ReadReg(PP_ChipID));
00305     <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
00306 
00307     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"PP_ISAIOB: "</span>);
00308     <a class="code" href="group__rprintf.html#ga8">rprintfu16</a>(cs8900ReadReg(PP_ISAIOB));
00309     <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
00310 
00311     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"MAC addr: "</span>);
00312     <a class="code" href="group__rprintf.html#ga8">rprintfu16</a>(cs8900ReadReg(PP_IA+0));
00313     <a class="code" href="group__rprintf.html#ga8">rprintfu16</a>(cs8900ReadReg(PP_IA+2));
00314     <a class="code" href="group__rprintf.html#ga8">rprintfu16</a>(cs8900ReadReg(PP_IA+4));
00315     <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
00316 }
00317 
<a name="l00318"></a><a class="code" href="group__nic.html#ga4">00318</a> <span class="keywordtype">void</span> <a class="code" href="group__nic.html#ga4">nicRegDump</a>(<span class="keywordtype">void</span>)
00319 {
00320     cs8900IORegDump();
00321     cs8900RegDump();
00322 }
00323 
00324 
00325 u08 cs8900LinkStatus(<span class="keywordtype">void</span>)
00326 {
00327     <span class="keywordflow">if</span>(cs8900ReadReg(PP_LineST) &amp; LINK_OK)
00328         <span class="keywordflow">return</span> 1;
00329     <span class="keywordflow">else</span>
00330         <span class="keywordflow">return</span> 0;
00331 }
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